Wikipedia

Thunderstorm

(Redirected fromSevere thunderstorm)
"Electrical storm" redirects here. For other uses, seeElectrical storm (disambiguation).
For other uses, seeThunderstorm (disambiguation).

Athunderstorm,also known as anelectrical stormor alightning storm,is a storm characterized by the presence oflightning[1]and itsacousticeffect on theEarth's atmosphere,known asthunder.[2]Relatively weak thunderstorms are sometimes calledthundershowers.[3]Thunderstorms occur in a type of cloud known as acumulonimbus.[4]They are usually accompanied bystrong winds[1]and often produceheavy rain[1]and sometimessnow,sleet,orhail,[1]but some thunderstorms produce little precipitation orno precipitationat all. Thunderstorms mayline up in a seriesor become arainband,known as asquall line.Strong orsevere thunderstormsinclude some of the most dangerous weather phenomena, including large hail, strong winds, andtornadoes.Some of the most persistent severe thunderstorms, known assupercells,rotate as do cyclones. While most thunderstorms move with the mean wind flow through the layer of thetropospherethat they occupy, verticalwind shearsometimes causes a deviation in their course at a right angle to the wind shear direction.

Thunderstorm
Lightning from a thunderstorm near Pritzerbe, Germany
Area of occurrencePrimarily tropical and alsotemperateregions.
SeasonMost common in spring and summer. (in temperate regions)
Common in wet season. (in tropical regions)
EffectDepends on the storm, may involve rain, hail, and/or high winds. May cause flooding or fires.
A typical thunderstorm over a field.
Summer thunderstorm in the woods
Good summer thunderstorm
The sound of a thunderstorm
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Spring thunderstorm in suburbs
The sound of part of a thunderstorm
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Thunderstorms result from the rapid upward movement of warm, moist air, sometimes along afront.[5]However, some kind ofcloud forcing,whether it is a front,shortwavetrough, or another system is needed for the air to rapidly accelerate upward. As the warm, moist air moves upward, it cools,condenses,[5]and forms a cumulonimbus cloud that can reach heights of over 20 kilometres (12 mi). As the rising air reaches itsdew pointtemperature, water vapor condenses into water droplets or ice, reducing pressure locally within the thunderstorm cell. Any precipitation falls the long distance through the clouds towards the Earth's surface. As the droplets fall, they collide with other droplets and become larger. The falling droplets create adowndraftas it pulls cold air with it, and this cold air spreads out at the Earth's surface, occasionally causing strong winds that are commonly associated with thunderstorms.

Thunderstorms can form and develop in any geographic location but most frequently within themid-latitude,where warm, moist air from tropical latitudes collides with cooler air from polar latitudes.[6]Thunderstorms are responsible for the development and formation of many severe weather phenomena, which can be potentially hazardous. Damage that results from thunderstorms is mainly inflicted bydownburstwinds, large hailstones, andflash floodingcaused by heavyprecipitation.Stronger thunderstorm cells are capable of producing tornadoes andwaterspouts.

There are three types of thunderstorms:single-cell,multi-cell,andsupercell.[7]Supercell thunderstorms are the strongest and most severe.[7]Mesoscale convective systemsformed by favorable vertical wind shear within the tropics andsubtropicscan be responsible for the development ofhurricanes.Dry thunderstorms,with no precipitation, can cause the outbreak ofwildfiresfrom the heat generated from thecloud-to-ground lightningthat accompanies them. Several means are used to study thunderstorms:weather radar,weather stations,and video photography. Past civilizations held various myths concerning thunderstorms and their development as late as the 18th century. Beyond the Earth's atmosphere, thunderstorms have also been observed on the planets ofJupiter,Saturn,Neptune,and, probably,Venus.

Life cycle

Stages of a thunderstorm's life
See also:Cloud

Warm air has a lowerdensitythan cool air, so warmer air rises upwards and cooler air will settle at the bottom[8](this effect can be seen with ahot air balloon).[9]Clouds form as relatively warmer air, carrying moisture, rises within cooler air. The moist air rises, and, as it does so, it cools and some of thewater vaporin that rising aircondenses.[10]When the moisture condenses, it releases energy known aslatent heatof condensation, which allows the rising packet of air to cool less than the cooler surrounding air[11]continuing the cloud's ascension. If enoughinstabilityis present in the atmosphere, this process will continue long enough forcumulonimbusclouds to form and producelightningandthunder.Meteorological indices such asconvective available potential energy(CAPE) and thelifted indexcan be used to assist in determining potential upward vertical development of clouds.[12]Generally, thunderstorms require three conditions in order to form:

  1. Moisture
  2. An unstable airmass
  3. A lifting force (heat)

All thunderstorms, regardless of type, go through three stages: thedeveloping stage,themature stage,and thedissipation stage.[13][14]The average thunderstorm has a 24 km (15 mi) diameter. Depending on the conditions present in the atmosphere, each of these three stages take an average of 30 minutes.[15]

Developing stage

Acumulus congestus' transformation into a maturecumulonimbus incus

The first stage of a thunderstorm is the cumulus stage or developing stage. During this stage, masses of moisture are lifted upwards into the atmosphere. The trigger for this lift can besolar illumination,where the heating of the ground producesthermals,or where two winds converge forcing air upwards, or where winds blow over terrain of increasing elevation. The moisture carried upward cools into liquid drops of water due to lower temperatures at high altitude, which appear ascumulusclouds. As the water vapor condenses into liquid,latent heatis released, which warms the air, causing it to become less dense than the surrounding, drier air. The air tends to rise in anupdraftthrough the process ofconvection(hence the termconvective precipitation). This process creates alow-pressure zonewithin and beneath the forming thunderstorm. In a typical thunderstorm, approximately 500 million kilograms of water vapor are lifted into theEarth's atmosphere.[16][failed verification]

Mature stage

Anvil-shaped thundercloud in the mature stage

In the mature stage of a thunderstorm, the warmed air continues to rise until it reaches an area of warmer air and can rise no farther. Often this 'cap' is thetropopause.The air is instead forced to spread out, giving the storm a characteristicanvilshape. The resulting cloud is calledcumulonimbus incus.The water dropletscoalesceinto larger and heavier droplets and freeze to become ice particles. As these fall, they melt to become rain. If the updraft is strong enough, the droplets are held aloft long enough to become so large that they do not melt completely but fall ashail.While updrafts are still present, the falling rain drags the surrounding air with it, creatingdowndraftsas well. The simultaneous presence of both an updraft and a downdraft marks the mature stage of the storm and produces cumulonimbus clouds. During this stage, considerable internalturbulencecan occur, which manifests as strong winds, severe lightning, and eventornadoes.[17]

Typically, if there is littlewind shear,the storm will rapidly enter the dissipating stage and 'rain itself out',[14]but, if there is sufficient change in wind speed or direction, the downdraft will be separated from the updraft, and the storm may become asupercell,where the mature stage can sustain itself for several hours.[18]

Dissipating stage

A thunderstorm in an environment with no winds to shear the storm or blow the anvil in any one direction
Flanking linein front of a dissipatingcumulonimbus incuscloud

In the dissipation stage, the thunderstorm is dominated by the downdraft. If atmospheric conditions do not support super cellular development, this stage occurs rather quickly, approximately 20–30 minutes into the life of the thunderstorm. The downdraft will push down out of the thunderstorm, hit the ground and spread out. This phenomenon is known as adownburst.The cool air carried to the ground by the downdraft cuts off the inflow of the thunderstorm, the updraft disappears and the thunderstorm will dissipate. Thunderstorms in an atmosphere with virtually no vertical wind shear weaken as soon as they send out an outflow boundary in all directions, which then quickly cuts off itsinflowof relatively warm, moist air, and kills the thunderstorm's further growth.[19]The downdraft hitting the ground creates anoutflow boundary.This can cause downbursts, a potential hazardous condition for aircraft to fly through, as a substantial change in wind speed and direction occurs, resulting in a decrease of airspeed and the subsequent reduction in lift for the aircraft. The stronger theoutflow boundaryis, the stronger the resultant vertical wind shear becomes.[20]

Classification

Conditions favorable for thunderstorm types and complexes

There are four main types of thunderstorms: single-cell, multi-cell, squall line (also called multi-cell line) and supercell.[7]Which type forms depends on the instability and relative wind conditions at different layers of the atmosphere ( "wind shear"). Single-cell thunderstorms form in environments of low vertical wind shear and last only 20–30 minutes.

Organized thunderstorms and thunderstorm clusters/lines can have longer life cycles as they form in environments of significant vertical wind shear, normally greater than 25 knots (13 m/s) in the lowest 6 kilometres (3.7 mi) of thetroposphere,[21]which aids the development of stronger updrafts as well as various forms of severe weather. The supercell is the strongest of the thunderstorms,[7]most commonly associated with large hail, high winds, and tornado formation.Precipitable watervalues of greater than 31.8 millimetres (1.25 in) favor the development of organized thunderstorm complexes.[22]Those with heavy rainfall normally have precipitable water values greater than 36.9 millimetres (1.45 in).[23]Upstream values ofCAPEof greater than 800 J/kg are usually required for the development of organized convection.[24]

Single-cell

Main article:Air-mass thunderstorm
A single-cell thunderstorm overWagga Wagga

This term technically applies to a single thunderstorm with one main updraft. Also known asair-mass thunderstorms,these are the typical summer thunderstorms in many temperate locales. They also occur in the cool unstable air that often follows the passage of acold frontfrom the sea during winter. Within a cluster of thunderstorms, the term "cell" refers to each separate principal updraft. Thunderstorm cells occasionally form in isolation, as the occurrence of one thunderstorm can develop an outflow boundary that sets up new thunderstorm development. Such storms are rarely severe and are a result of local atmospheric instability; hence the term "air mass thunderstorm". When such storms have a brief period of severe weather associated with them, it is known as a pulse severe storm. Pulse severe storms are poorly organized and occur randomly in time and space, making them difficult to forecast. Single-cell thunderstorms normally last 20–30 minutes.[15]

Multi-cell clusters

Main article:Multicellular thunderstorm
A group of thunderstorms over Brazil photographed by theSpace ShuttleChallenger

This is the most common type of thunderstorm development.Mature thunderstormsare found near the center of the cluster, while dissipating thunderstorms exist on their downwind side.Multicell stormsform as clusters of storms but may then evolve into one or moresquall lines.While each cell of the cluster may only last 20 minutes, the cluster itself may persist for hours at a time. They often arise from convective updrafts in or near mountain ranges and linear weather boundaries, such as strong cold fronts or troughs of low pressure. These type of storms are stronger than the single-cell storm, yet much weaker than the supercell storm. Hazards with the multicell cluster include moderate-sized hail, flash flooding, and weak tornadoes.[15]

Multicell lines

Main article:Squall line
See also:List of derecho events

A squall line is an elongated line ofsevere thunderstormsthat can form along or ahead of acold front.[25][26]In the early 20th century, the term was used as a synonym forcold front.[27]The squall line contains heavyprecipitation,hail,frequentlightning,strong straight line winds, and possiblytornadoesandwaterspouts.[28]Severe weatherin the form of strong straight-line winds can be expected in areas where the squall line itself is in the shape of abow echo,within the portion of the line that bows out the most.[29]Tornadoescan be found along waves within aline echo wave pattern,or LEWP, where mesoscalelow pressure areasare present.[30]Some bow echoes in the summer are calledderechos,and move quite fast through large sections of territory.[31]On the back edge of the rain shield associated with mature squall lines, awake lowcan form, which is a mesoscale low pressure area that forms behind the mesoscale high pressure system normally present under the rain canopy, which are sometimes associated with aheat burst.[32]This kind of storm is also known as "Wind of the Stony Lake" (simplified Chinese:Thạch hồ phong;traditional Chinese:Thạch hồ phong;shi2 hu2 feng1) in southern China.[33]

Supercells

Main article:Supercell
The setting sun illuminates the top of a classic anvil-shaped thunderstorm cloud in easternNebraska,United States.

Supercell storms are large, usuallysevere,quasi-steady-state storms that form in an environment where wind speed or wind direction varies with height ( "wind shear"), and they have separate downdrafts and updrafts (i.e., where its associated precipitation is not falling through the updraft) with a strong, rotating updraft (a"mesocyclone"). These storms normally have such powerful updrafts that the top of the supercell storm cloud (or anvil) can break through thetroposphereand reach into the lower levels of thestratosphere.Supercell storms can be 24 kilometres (15 mi) wide. Research has shown that at least 90 percent of supercells causesevere weather.[18]These storms can produce destructivetornadoes,extremely largehailstones(10 centimetres or 4 inches diameter),straight-line windsin excess of 130 km/h (81 mph), andflash floods.In fact, research has shown that most tornadoes occur from this type of thunderstorm.[34]Supercells are generally the strongest type of thunderstorm.[15]

Severe thunderstorms

In the United States, a thunderstorm is classed as severe if winds reach at least 93 kilometres per hour (58 mph), hail is 25 millimetres (1 in) in diameter or larger, or iffunnel cloudsortornadoesare reported.[35][36][37]Although a funnel cloud or tornado indicates a severe thunderstorm, atornado warningis issued in place of asevere thunderstorm warning.A severe thunderstorm warning is issued if a thunderstorm becomes severe, or will soon turn severe. In Canada, a rainfall rate greater than 50 millimetres (2 in) in one hour, or 75 millimetres (3 in) in three hours, is also used to indicate severe thunderstorms.[38]Severe thunderstorms can occur from any type of storm cell. However,multicell,supercell,and squall lines represent the most common forms of thunderstorms that produce severe weather.[18]

Mesoscale convective systems

See also:Mesoscale convective system
MCC moving through theGreat Lakes region:on 13 June 2022, at 18:45 UTC

Amesoscale convective system(MCS) is a complex of thunderstorms that becomes organized on a scale larger than the individual thunderstorms but smaller thanextratropical cyclones,and normally persists for several hours or more.[39]A mesoscale convective system's overall cloud and precipitation pattern may be round or linear in shape, and include weather systems such astropical cyclones,squall lines,lake-effect snowevents,polar lows,andmesoscale convective complexes(MCCs), and they generally form nearweather fronts.Most mesoscale convective systems develop overnight and continue their lifespan through the next day.[14]They tend to form when the surface temperature varies by more than 5 °C (9 °F) between day and night.[40]The type that forms during the warm season over land has been noted across North America, Europe, and Asia, with a maximum in activity noted during the late afternoon and evening hours.[41][42]

Forms of MCS that develop in the tropics are found in use either theIntertropical Convergence Zoneormonsoon troughs,generally within the warm season between spring and fall. More intense systems form over land than over water.[43][44]One exception is that oflake-effect snowbands, which form due to cold air moving across relatively warm bodies of water, and occurs from fall through spring.[45]Polar lows are a second special class of MCS. They form at high latitudes during the cold season.[46]Once the parent MCS dies, later thunderstorm development can occur in connection with its remnantmesoscale convective vortex(MCV).[47]Mesoscale convective systems are important to theUnited States rainfall climatologyover theGreat Plainssince they bring the region about half of their annual warm season rainfall.[48]

Motion

Thunderstorm line viewed inreflectivity(dBZ) on aplan position indicatorradar display

The two major ways thunderstorms move are viaadvectionof the wind and propagation alongoutflow boundariestowards sources of greater heat and moisture. Many thunderstorms move with the mean wind speed through the Earth'stroposphere,the lowest 8 kilometres (5.0 mi) of theEarth's atmosphere.Weaker thunderstorms are steered by winds closer to the Earth's surface than stronger thunderstorms, as the weaker thunderstorms are not as tall. Organized, long-lived thunderstorm cells and complexes move at a right angle to the direction of the verticalwind shearvector. If the gust front, or leading edge of the outflow boundary, races ahead of the thunderstorm, its motion will accelerate in tandem. This is more of a factor with thunderstorms with heavy precipitation (HP) than with thunderstorms with low precipitation (LP). When thunderstorms merge, which is most likely when numerous thunderstorms exist in proximity to each other, the motion of the stronger thunderstorm normally dictates the future motion of the merged cell. The stronger the mean wind, the less likely other processes will be involved in storm motion. Onweather radar,storms are tracked by using a prominent feature and tracking it from scan to scan.[18]

Back-building thunderstorm

A back-building thunderstorm, commonly referred to as atraining thunderstorm,is a thunderstorm in which new development takes place on the upwind side (usually the west or southwest side in theNorthern Hemisphere), such that the storm seems to remain stationary or propagate in a backward direction. Though the storm often appears stationary on radar, or even moving upwind, this is an illusion. The storm is really a multi-cell storm with new, more vigorous cells that form on the upwind side, replacing older cells that continue to drift downwind.[49][50]When this happens, catastrophic flooding is possible. InRapid City, South Dakota,in 1972, an unusual alignment of winds at various levels of the atmosphere combined to produce a continuously training set of cells that dropped an enormous quantity of rain upon the same area, resulting indevastating flash flooding.[51]A similar event occurred inBoscastle,England, on 16 August 2004,[52]and over Chennai on 1 December 2015.[53]

Hazards

Each year, many people are killed or seriously injured by severe thunderstorms despite the advance warning[citation needed].While severe thunderstorms are most common in the spring and summer, they can occur at just about any time of the year.

Cloud-to-ground lightning

See also:Lightning strikeandWildfire
A return stroke, cloud-to-ground lightning strike during a thunderstorm

Cloud-to-ground lightningfrequently occurs within the phenomena of thunderstorms and have numerous hazards towards landscapes and populations. One of the more significant hazards lightning can pose is thewildfiresthey are capable of igniting.[54]Under a regime of low precipitation (LP) thunderstorms, where little precipitation is present, rainfall cannot prevent fires from starting when vegetation is dry as lightning produces a concentrated amount of extreme heat.[55]Direct damage caused by lightning strikes occurs on occasion.[56]In areas with a high frequency for cloud-to-ground lightning, like Florida, lightning causes several fatalities per year, most commonly to people working outside.[57]

Acid rain is also a frequent risk produced by lightning.Distilled waterhas aneutralpHof 7. "Clean" or unpolluted rain has a slightly acidic pH of about 5.2, because carbon dioxide and water in the air react together to formcarbonic acid,a weak acid (pH 5.6 in distilled water), but unpolluted rain also contains other chemicals.[58]Nitric oxidepresent during thunderstorm phenomena,[59]caused by the oxidation of atmospheric nitrogen, can result in the production of acid rain, if nitric oxide forms compounds with the water molecules in precipitation, thus creating acid rain. Acid rain can damage infrastructures containing calcite or certain other solid chemical compounds. In ecosystems, acid rain can dissolve plant tissues of vegetations and increase acidification process in bodies of water and insoil,resulting in deaths of marine and terrestrial organisms.[60]

Hail

Main article:Hail
Hailstorm inBogotá,Colombia

Any thunderstorm that produces hail that reaches the ground is known as a hailstorm.[61]Thunderclouds that are capable of producing hailstones are often seen obtaining green coloration. Hail is more common along mountain ranges because mountains force horizontal winds upwards (known asorographic lifting), thereby intensifying the updrafts within thunderstorms and making hail more likely.[62]One of the more common regions for large hail is across mountainous northern India, which reported one of the highest hail-related death tolls on record in 1888.[63]China also experiences significant hailstorms.[64]Across Europe,Croatiaexperiences frequent occurrences of hail.[65]

In North America, hail is most common in the area whereColorado,Nebraska,andWyomingmeet, known as "Hail Alley".[66]Hail in this region occurs between the months of March and October during the afternoon and evening hours, with the bulk of the occurrences from May through September.Cheyenne, Wyoming,is North America's most hail-prone city with an average of nine to ten hailstorms per season.[67]In South America, areas prone to hail are cities like Bogotá, Colombia.

Hail can cause serious damage, notably toautomobiles,aircraft, skylights, glass-roofed structures, livestock, and most commonly, farmers'crops.[67]Hail is one of the most significant thunderstorm hazards to aircraft. When hail stones exceed 13 millimetres (0.5 in) in diameter, planes can be seriously damaged within seconds.[68]The hailstones accumulating on the ground can also be hazardous to landing aircraft. Wheat, corn, soybeans, and tobacco are the most sensitive crops to hail damage.[63]Hail is one of Canada's most costly hazards.[69]Hailstorms have been the cause of costly and deadly events throughout history. One of the earliest recorded incidents occurred around the 9th century inRoopkund,Uttarakhand, India.[70]The largest hailstone in terms of maximum circumference and length ever recorded in the United States fell in 2003 inAurora, Nebraska,United States.[71]

Tornadoes and waterspouts

In June 2007, the town ofElie, Manitobawas struck by anF5tornado.
Main articles:TornadoandWaterspout

A tornado is a violent, rotating column of air in contact with both the surface of the earth and a cumulonimbus cloud (otherwise known as a thundercloud) or, in rare cases, the base of acumulus cloud.Tornadoes come in many sizes but are typically in the form of a visiblecondensation funnel,whose narrow end touches the earth and is often encircled by a cloud ofdebrisanddust.[72]Most tornadoes have wind speeds between 40 and 110 mph (64 and 177 km/h), are approximately 75 metres (246 ft) across, and travel several kilometers (a few miles) before dissipating. Some attain wind speeds of more than 300 mph (480 km/h), stretch more than 1,600 metres (1 mi) across, and stay on the ground for more than 100 kilometres (dozens of miles).[73][74][75]

TheFujita scaleand theEnhanced Fujita Scalerate tornadoes by damage caused. An EF0 tornado, the weakest category, damages trees but does not cause significant damage to structures. An EF5 tornado, the strongest category, rips buildings off their foundations and can deform large skyscrapers. The similarTORRO scaleranges from a T0 for extremely weak tornadoes to T11 for the most powerful known tornadoes.[76]Dopplerradardata,photogrammetry,and ground swirl patterns (cycloidal marks) may also be analyzed to determine intensity and award a rating.[77]

Formation of numerous waterspouts in theGreat Lakesregion (North America)

Waterspouts have similar characteristics as tornadoes, characterized by a spiraling funnel-shaped wind current that form over bodies of water, connecting to large cumulonimbus clouds. Waterspouts are generally classified as forms of tornadoes, or more specifically, non-supercelledtornadoes that develop over large bodies of water.[78]These spiralling columns of air frequently develop within tropical areas close to theequator,but are less common within areas ofhigh latitude.[79]

Flash flood

Main article:Flash flood
A flash flood caused by a severe thunderstorm

Flash flooding is the process where a landscape, most notably an urban environment, is subjected to rapid floods.[80]These rapid floods occur more quickly and are more localized than seasonal river flooding or areal flooding[81]and are frequently (though not always) associated with intense rainfall.[82]Flash flooding can frequently occur in slow-moving thunderstorms and is usually caused by the heavy liquid precipitation that accompanies it. Flash floods are most common in arid regions as well as densely populated urban environments, where few plants, and bodies of water are present to absorb and contain the extra water. Flash flooding can be hazardous to small infrastructure, such as bridges, and weakly constructed buildings. Plants and crops in agricultural areas can be destroyed and devastated by the force of raging water. Automobiles parked within affected areas can also be displaced.Soilerosion can occur as well, exposing risks oflandslidephenomena.

Downburst

Main article:Downburst
Trees uprooted or displaced by the force of a downburst wind in northwestMonroe County, Wisconsin

Downburst winds can produce numerous hazards to landscapes experiencing thunderstorms. Downburst winds are generally very powerful, and are often mistaken for wind speeds produced by tornadoes,[83]due to the concentrated amount of force exerted by their straight-horizontal characteristic. Downburst winds can be hazardous to unstable, incomplete, or weakly constructed infrastructures and buildings. Agricultural crops, and other plants in nearby environments can be uprooted and damaged. Aircraft engaged in takeoff or landing can crash.[14][83]Automobiles can be displaced by the force exerted by downburst winds. Downburst winds are usually formed in areas when high pressure air systems of downdrafts begin to sink and displace the air masses below it, due to their higher density. When these downdrafts reach the surface, they spread out and turn into the destructive straight-horizontal winds.[14]

Thunderstorm asthma

Main article:Thunderstorm asthma

Thunderstorm asthma is the triggering of an asthma attack by environmental conditions directly caused by a local thunderstorm. During a thunderstorm, pollen grains can absorb moisture and then burst into much smaller fragments with these fragments being easily dispersed by wind. While larger pollen grains are usually filtered by hairs in the nose, the smaller pollen fragments are able to pass through and enter the lungs, triggering the asthma attack.[84][85][86][87]

Safety precautions

See also:Emergency managementandTornado preparedness

Most thunderstorms come and go fairly uneventfully; however, any thunderstorm can becomesevere,and all thunderstorms, by definition, present the danger oflightning.[88]Thunderstorm preparedness and safety refers to taking steps before, during, and after a thunderstorm to minimize injury and damage.

Preparedness

Preparedness refers to precautions that should be taken before a thunderstorm. Some preparedness takes the form of general readiness (as a thunderstorm can occur at any time of the day or year).[89]Preparing a family emergency plan, for example, can save valuable time if a storm arises quickly and unexpectedly.[90]Preparing the home by removing dead or rotting limbs and trees, which can be blown over in high winds, can also significantly reduce the risk of property damage and personal injury.[91]

TheNational Weather Service(NWS) in the United States recommends several precautions that people should take if thunderstorms are likely to occur:[89]

  • Know the names of local counties, cities, and towns, as these are how warnings are described.[89]
  • Monitor forecasts and weather conditions and know whether thunderstorms are likely in the area.[92]
  • Be alert for natural signs of an approaching storm.
  • Cancel or reschedule outdoor events (to avoid being caught outdoors when a storm hits).[92]
  • Take action early so you have time to get to a safe place.[92]
  • Get inside a substantial building or hard-topped metal vehicle before threatening weather arrives.[92]
  • If you hearthunder,get to the safe place immediately.[92]
  • Avoid open areas like hilltops, fields, and beaches, and do not be or be near the tallest objects in an area when thunderstorms are occurring.[89][92]
  • Do not shelter under tall or isolated trees during thunderstorms.[92]
  • If in the woods, put as much distance as possible between you and any trees during thunderstorms.[92]
  • If in a group, spread out to increase the chances of survivors who could come to the aid of any victims from alightning strike.[92]

Safety

While safety and preparedness often overlap, "thunderstorm safety" generally refers to what people should do during and after a storm. TheAmerican Red Crossrecommends that people follow these precautions if a storm is imminent or in progress:[88]

  • Take action immediately upon hearing thunder. Anyone close enough to the storm to hear thunder can be struck by lightning.[91]
  • Avoid electrical appliances, including corded telephones.[88]Cordlessand wireless telephones are safe to use during a thunderstorm.[91]
  • Close and stay away from windows and doors, as glass can become a serious hazard in high wind.[88]
  • Do not bathe or shower, as plumbing conducts electricity.
  • If driving, safely exit the roadway, turn on hazard lights, and park. Remain in the vehicle and avoid touching metal.[88]

The NWS stopped recommending the "lightning crouch" in 2008 as it does not provide a significant level of protection and will not significantly lower the risk of being killed or injured from a nearby lightning strike.[92][93][94]

Thunderstorm nearCuero, Texas

Frequent occurrences

See also:United States rainfall climatology
Rotatingwall cloudinOklahoma

Thunderstorms occur throughout the world, even in the polar regions, with the greatest frequency in tropicalrainforestareas, where they may occur nearly daily. At any given time, approximately 2,000 thunderstorms are occurring on Earth.[95]KampalaandTororoin Uganda have each been mentioned as the most thunderous places on Earth,[96]a claim also made for Singapore andBogoron the Indonesian island ofJava.Other cities known for frequent storm activity includeDarwin,Caracas,ManilaandMumbai.Thunderstorms are associated with the variousmonsoonseasons around the globe, and they populate therainbandsoftropical cyclones.[97]In temperate regions, they are most frequent in spring and summer, although they can occur along or ahead ofcold frontsat any time of year.[98]They may also occur within a cooler air mass following the passage of a cold front over a relatively warmer body of water. Thunderstorms are rare in polar regions because of cold surface temperatures.[citation needed]

Some of the most powerful thunderstorms over the United States occur in the Midwest and theSouthern states.These storms can produce large hail and powerful tornadoes. Thunderstorms are relatively uncommon along much of theWest Coast of the United States,[99]but they occur with greater frequency in the inland areas, particularly theSacramentoandSan JoaquinValleys of California. In spring and summer, they occur nearly daily in certain areas of theRocky Mountainsas part of theNorth American Monsoonregime. In theNortheast,storms take on similar characteristics and patterns as the Midwest, but with less frequency and severity. During the summer,air-mass thunderstormsare an almost daily occurrence over central and southern parts of Florida.[citation needed]

Energy

How thunderstorms launch particle beams into space
See also:Sprite (lightning),Upper-atmospheric lightning,andSt. Elmo's fire

If the quantity of water that is condensed in and subsequently precipitated from a cloud is known, then the total energy of a thunderstorm can be calculated. In a typical thunderstorm, approximately 5×108kg of water vapor are lifted, and the amount of energy released when this condenses is 1015joules.This is on the same order of magnitude of energy released within a tropical cyclone, and more energy than that released duringthe atomic bomb blast at Hiroshima, Japan in 1945.[16][failed verification]

TheFermi Gamma-ray Burst Monitorresults show thatgamma raysandantimatterparticles (positrons) can be generated in powerful thunderstorms.[100]It is suggested that the antimatter positrons are formed interrestrial gamma-ray flashes(TGF). TGFs are brief bursts occurring inside thunderstorms and associated with lightning. The streams of positrons and electrons collide higher in the atmosphere to generate more gamma rays.[101]About 500 TGFs may occur every day worldwide, but mostly go undetected.

Studies

In more contemporary times, thunderstorms have taken on the role of a scientific curiosity. Every spring,storm chasershead to theGreat Plainsof the United States and the Canadian Prairies to explore the scientific aspects of storms and tornadoes through use of videotaping.[102]Radio pulses produced by cosmic rays are being used to study how electric charges develop within thunderstorms.[103]More organized meteorological projects such asVORTEX2use an array of sensors, such as theDoppler on Wheels,vehicles with mounted automatedweather stations,weather balloons,and unmanned aircraft to investigate thunderstorms expected to produce severe weather.[104]Lightning is detected remotely using sensors that detect cloud-to-ground lightning strokes with 95 percent accuracy in detection and within 250 metres (820 ft) of their point of origin.[105]

Summer storm in 19th-century Polishcountryside–picturebyJozef Chelmonski,1896, 107 cm (42.1 in)x163 cm (64.1 in),National Museum in Cracow

Mythology and religion

Thunderstorms strongly influenced many early civilizations.Greeksbelieved that they were battles waged byZeus,who hurled lightning bolts forged byHephaestus.SomeAmerican Indiantribes associated thunderstorms with theThunderbird,who they believed was a servant of theGreat Spirit.TheNorseconsidered thunderstorms to occur whenThorwent to fightJötnar,with the thunder and lightning being the effect of his strikes with the hammerMjölnir.HinduismrecognizesIndraas the god of rain and thunderstorms. Christian doctrine accepts that fierce storms are the work of God. These ideas were still within the mainstream as late as the 18th century.[106]

Martin Lutherwas out walking when a thunderstorm began, causing him to pray to God for being saved and promising to become a monk.[107]

Outside of Earth

Thunderstorms, evidenced by flashes oflightning,on Jupiter have been detected and are associated with clouds where water may exist as both a liquid and ice, suggesting a mechanism similar to that on Earth. (Water is apolar moleculethat can carry a charge, so it is capable of creating the charge separation needed to produce lightning).[108]These electrical discharges can be up to a thousand times more powerful than lightning on the Earth.[109]The water clouds can form thunderstorms driven by the heat rising from the interior.[110]The clouds of Venus may also be capable of producinglightning;some observations suggest that the lightning rate is at least half of that on Earth.[111]

See also

References

  1. ^abcd"thunderstorm | Definition, Types, Structure, & Facts".Encyclopedia Britannica.Retrieved14 January2021.
  2. ^"Weather Glossary – T".National Weather Service. 21 April 2005.Retrieved23 August2006.
  3. ^"Lightning FAQ".JetStream.National Oceanic and Atmospheric Administration.
  4. ^"Cumulonimbus clouds".Met Office.Retrieved14 January2021.
  5. ^ab"Thunderstorms | UCAR Center for Science Education".scied.ucar.edu.Retrieved14 January2021.
  6. ^National Severe Storms Laboratory."SEVERE WEATHER 101 / Thunderstorm Basics".SEVERE WEATHER 101.National Oceanic and Atmospheric Administration.Retrieved2 January2020.
  7. ^abcd"Thunderstorms and Tornadoes".ux1.eiu.edu.Retrieved14 January2021.
  8. ^Albert Irvin Frye (1913).Civil engineers' pocket book: a reference-book for engineers, contractors.D. Van Nostrand Company. p.462.Retrieved31 August2009.
  9. ^Yikne Deng (2005).Ancient Chinese Inventions.Chinese International Press. pp.112–13.ISBN978-7-5085-0837-5.Retrieved18 June2009.
  10. ^FMI (2007)."Fog And Stratus – Meteorological Physical Background".Zentralanstalt für Meteorologie und Geodynamik.Retrieved7 February2009.
  11. ^Chris C. Mooney (2007).Storm world: hurricanes, politics, and the battle over global warming.Houghton Mifflin Harcourt. p.20.ISBN978-0-15-101287-9.Retrieved31 August2009.
  12. ^David O. Blanchard (September 1998)."Assessing the Vertical Distribution of Convective Available Potential Energy".Weather and Forecasting.13(3).American Meteorological Society:870–7.Bibcode:1998WtFor..13..870B.doi:10.1175/1520-0434(1998)013<0870:ATVDOC>2.0.CO;2.S2CID124375544.
  13. ^"Thunderstorm Basics".NOAA National Severe Storms Laboratory.Retrieved14 January2021.
  14. ^abcdeMichael H. Mogil (2007).Extreme Weather.New York: Black Dog & Leventhal Publisher. pp.210–211.ISBN978-1-57912-743-5.
  15. ^abcdNational Severe Storms Laboratory (15 October 2006)."A Severe Weather Primer: Questions and Answers about Thunderstorms".National Oceanic and Atmospheric Administration.Archived fromthe originalon 25 August 2009.Retrieved1 September2009.
  16. ^abGianfranco Vidali (2009)."Rough Values of Various Processes".Syracuse University.Archived fromthe originalon 15 March 2010.Retrieved31 August2009.
  17. ^Pilot's Web The Aviator's Journal (13 June 2009)."Structural Icing in VMC".Archived fromthe originalon 19 August 2011.Retrieved2 September2009.
  18. ^abcdJon W. Zeitler & Matthew J. Bunkers (March 2005)."Operational Forecasting of Supercell Motion: Review and Case Studies Using Multiple Datasets"(PDF).National Weather ServiceForecast Office,Riverton, Wyoming.Retrieved30 August2009.
  19. ^The Weather World 2010 Project (3 September 2009)."Vertical Wind Shear".University of Illinois.Retrieved21 October2006.{{cite web}}:CS1 maint: numeric names: authors list (link)
  20. ^T. T. Fujita(1985).The Downburst, microburst and macroburst: SMRP Research Paper 210.
  21. ^Markowski, Paul and Yvette Richardson. Mesoscale Meteorology in Midlatitudes. John Wiley & Sons, Ltd., 2010. pp. 209.
  22. ^Maddox R.A., Chappell C.F., Hoxit L.R. (1979)."Synoptic and meso-α scale aspects of flash flood events".Bull. Amer. Meteor. Soc.60(2):115–123.Bibcode:1979BAMS...60..115M.doi:10.1175/1520-0477-60.2.115.{{cite journal}}:CS1 maint: multiple names: authors list (link)
  23. ^Schnetzler, Amy Eliza. Analysis of Twenty-Five Years of Heavy Rainfall Events in the Texas Hill Country. University of Missouri-Columbia, 2008. pp. 74.
  24. ^Markowski, Paul and Yvette Richardson. Mesoscale Meteorology in Midlatitudes. John Wiley & Sons, Ltd., 2010. pp. 215, 310.
  25. ^Glossary of Meteorology (2009)."Squall line".American Meteorological Society.Archived fromthe originalon 17 December 2008.Retrieved14 June2009.
  26. ^Glossary of Meteorology (2009)."Prefrontal squall line".American Meteorological Society.Archived fromthe originalon 17 August 2007.Retrieved14 June2009.
  27. ^University of Oklahoma (2004)."The Norwegian Cyclone Model"(PDF).Archived fromthe original(PDF)on 1 September 2006.Retrieved17 May2007.
  28. ^Office of the Federal Coordinator for Meteorology (2008)."Chapter 2: Definitions"(PDF).NOAA.pp.2–1. Archived fromthe original(PDF)on 6 May 2009.Retrieved3 May2009.
  29. ^Glossary of Meteorology (2009)."Bow echo".American Meteorological Society.Archived fromthe originalon 6 June 2011.Retrieved14 June2009.
  30. ^Glossary of Meteorology (2009).Line echo wave pattern.American Meteorological Society.ISBN978-1-878220-34-9.Archived fromthe originalon 24 September 2008.Retrieved3 May2009.
  31. ^Stephen F. Corfidi; Jeffry S. Evans & Robert H. Johns (2015)."About Derechos".Storm Prediction Center,NCEP, NWS, NOAA Web Site.Retrieved17 February2015.
  32. ^Glossary of Meteorology (2009).Heat burst.American Meteorological Society.ISBN978-1-878220-34-9.Archived fromthe originalon 6 June 2011.Retrieved14 June2009.
  33. ^"Squall lines and" Shi Hu Feng "– what you want to know about the violent squalls hitting Hong Kong on 9 May 2005".Hong Kong Observatory. 17 June 2005. Archived fromthe originalon 25 October 2019.Retrieved23 August2006.
  34. ^"Supercell Thunderstorms".Weather World 2010 Project.University of Illinois. 4 October 1999.Retrieved23 August2006.
  35. ^National Weather Service(21 April 2005)."Weather Glossary – S".National Oceanic and Atmospheric Administration.Retrieved17 June2007.
  36. ^Kim Runk (2009).1 "Hail(.wmv). Silver Spring, Maryland: NOAA.
  37. ^National Weather ServiceForecast Office,Phoenix, Arizona(7 April 2009)."New Hail Criteria".Retrieved3 September2009.{{cite web}}:CS1 maint: multiple names: authors list (link)
  38. ^Environment CanadaOntario Region (24 May 2005)."Fact Sheet – Summer Severe Weather Warnings".Archived fromthe originalon 28 February 2009.Retrieved3 September2009.
  39. ^Glossary of Meteorology (2009)."Mesoscale convective system".American Meteorological Society.Archived fromthe originalon 6 June 2011.Retrieved27 June2009.
  40. ^Haerter, Jan O.; Meyer, Bettina; Nissen, Silas Boye (30 July 2020). "Diurnal self-aggregation".npj Climate and Atmospheric Science.3(1): 30.arXiv:2001.04740.Bibcode:2020npCAS...3...30H.doi:10.1038/s41612-020-00132-z.S2CID220856705.
  41. ^William R. Cotton; Susan van den Heever & Israel Jirak (2003)."Conceptual Models of Mesoscale Convective Systems: Part 9"(PDF).Colorado State University.Retrieved23 March2008.
  42. ^C. Morel & S. Senesi (2002)."A climatology of mesoscale convective systems over Europe using satellite infrared imagery II: Characteristics of European mesoscale convective systems".Quarterly Journal of the Royal Meteorological Society.128(584): 1973.Bibcode:2002QJRMS.128.1973M.doi:10.1256/003590002320603494.ISSN0035-9009.S2CID120021136.Retrieved2 March2008.
  43. ^Semyon A. Grodsky & James A. Carton (15 February 2003)."The Intertropical Convergence Zone in the South Atlantic and the Equatorial Cold Tongue"(PDF).Journal of Climate.16(4).University of Maryland, College Park:723.Bibcode:2003JCli...16..723G.doi:10.1175/1520-0442(2003)016<0723:TICZIT>2.0.CO;2.S2CID10083024.Retrieved5 June2009.
  44. ^Michael Garstang; David Roy Fitzjarrald (1999).Observations of surface to atmosphere interactions in the tropics.Oxford University Press US. pp.40–41.ISBN978-0-19-511270-2.
  45. ^B. Geerts (1998)."Lake Effect Snow".University of Wyoming.Retrieved24 December2008.
  46. ^E. A. Rasmussen & J. Turner (2003).Polar Lows: Mesoscale Weather Systems in the Polar Regions.Cambridge University Press. p. 612.ISBN978-0-521-62430-5.
  47. ^Lance F. Bosart & Thomas J. Galarneau Jr. (2005)."3.5 The Influence of the Great Lakes on Warm Season Weather Systems During BAMEX"(PDF).6thAmerican Meteorological SocietyCoastal Meteorology Conference.Retrieved15 June2009.
  48. ^William R. Cotton; Susan van den Heever & Israel Jirak (Fall 2003)."Conceptual Models of Mesoscale Convective Systems: Part 9"(PDF).Retrieved23 March2008.
  49. ^Stephen Corfidi (4 February 2015)."MCS Movement and Behavior (PowerPoint)".National Weather Service, Storm Prediction Center.Retrieved18 February2015.
  50. ^National Weather Service(1 September 2009)."Types of Thunderstorms".National Weather Service Southern Region Headquarters.Retrieved3 September2009.
  51. ^National Weather ServiceForecast Office,Rapid City, South Dakota(15 May 2007)."The Rapid City Flood of 1972".National Weather ServiceCentral Region Headquarters.Retrieved3 September2009.{{cite web}}:CS1 maint: multiple names: authors list (link)
  52. ^David Flower (9 February 2008)."Boscastle Flood 2004".Tintagel – King Arthur Country.Retrieved3 September2009.
  53. ^Jayesh Phadtare (2018)."Role of Eastern Ghats Orography and Cold Pool in an Extreme Rainfall Event over Chennai on 1 December 2015".Monthly Weather Review.146(4). American Meteorological Society.:943–965.Bibcode:2018MWRv..146..943P.doi:10.1175/MWR-D-16-0473.1.
  54. ^Scott, A (2000). "The Pre-Quaternary history of fire".Palaeogeography, Palaeoclimatology, Palaeoecology.164(1–4): 281.Bibcode:2000PPP...164..281S.doi:10.1016/S0031-0182(00)00192-9.
  55. ^Vladimir A. Rakov (1999)."Lightning Makes Glass".University of Florida,Gainesville.Retrieved7 November2007.
  56. ^Bruce Getz & Kelli Bowermeister (9 January 2009)."Lightning and Its Hazards".Hughston Sports Medicine Foundation. Archived fromthe originalon 24 January 2010.Retrieved9 September2009.
  57. ^Charles H. Paxton; J. Colson & N. Carlisle (2008)."P2.13 Florida lightning deaths and injuries 2004–2007".American Meteorological Society.Retrieved5 September2009.
  58. ^G. E. Likens; W. C. Keene; J. M. Miller & J. N. Galloway (1987). "Chemistry of precipitation from a remote, terrestrial site in Australia".Journal of Geophysical Research.92(13):299–314.Bibcode:1987JGR....92..299R.doi:10.1029/JA092iA01p00299.
  59. ^Joel S. Levine; Tommy R. Augustsson; Iris C. Andersont; James M. Hoell Jr. & Dana A. Brewer (1984). "Tropospheric sources of NOx: Lightning and biology".Atmospheric Environment.18(9):1797–1804.Bibcode:1984AtmEn..18.1797L.doi:10.1016/0004-6981(84)90355-X.PMID11540827.
  60. ^Office of Air and Radiation Clean Air Markets Division (1 December 2008)."Effects of Acid Rain – Surface Waters and own Aquatic Animals".United States Environmental Protection Agency.Retrieved5 September2009.
  61. ^Glossary of Meteorology (2009)."Hailstorm".American Meteorological Society.Archived fromthe originalon 6 June 2011.Retrieved29 August2009.
  62. ^Geoscience Australia (4 September 2007)."Where does severe weather occur?".Commonwealth of Australia. Archived fromthe originalon 21 June 2009.Retrieved28 August2009.
  63. ^abJohn E. Oliver (2005).Encyclopedia of World Climatology.Springer. p. 401.ISBN978-1-4020-3264-6.Retrieved28 August2009.
  64. ^Dongxia Liu; Guili Feng & Shujun Wu (February 2009). "The characteristics of cloud-to-ground lightning activity in hailstorms over northern China".Atmospheric Research.91(2–4):459–465.Bibcode:2009AtmRe..91..459L.doi:10.1016/j.atmosres.2008.06.016.
  65. ^Damir Počakal; Željko Večenaj & Janez Štalec (2009). "Hail characteristics of different regions in continental part of Croatia based on influence of orography".Atmospheric Research.93(1–3): 516.Bibcode:2009AtmRe..93..516P.doi:10.1016/j.atmosres.2008.10.017.
  66. ^Rene Munoz (2 June 2000)."Fact Sheet on Hail".University Corporation for Atmospheric Research. Archived fromthe originalon 15 October 2009.Retrieved18 July2009.
  67. ^abNolan J. Doesken (April 1994)."Hail, Hail, Hail! The Summertime Hazard of Eastern Colorado"(PDF).Colorado Climate.17(7). Archived fromthe original(PDF)on 25 November 2010.Retrieved18 July2009.
  68. ^Federal Aviation Administration(2009)."Hazards".Retrieved29 August2009.
  69. ^Damon P. Coppola (2007).Introduction to international disaster management.Butterworth-Heinemann. p. 62.ISBN978-0-7506-7982-4.
  70. ^David Orr (7 November 2004)."Giant hail killed more than 200 in Himalayas".Telegraph Group Unlimited via the Internet Wayback Machine. Archived fromthe originalon 3 December 2005.Retrieved28 August2009.
  71. ^Knight C. A., Knight N.C. (2005)."Very Large Hailstones From Aurora, Nebraska".Bull. Amer. Meteor. Soc.86(12):1773–1781.Bibcode:2005BAMS...86.1773K.doi:10.1175/bams-86-12-1773.
  72. ^Renno, Nilton O. (August 2008)."A thermodynamically general theory for convective vortices"(PDF).Tellus A.60(4):688–99.Bibcode:2008TellA..60..688R.doi:10.1111/j.1600-0870.2008.00331.x.hdl:2027.42/73164.
  73. ^Edwards, Roger(4 April 2006)."The Online Tornado FAQ".Storm Prediction Center.Retrieved8 September2006.
  74. ^ "Doppler On Wheels".Center for Severe Weather Research. 2006. Archived fromthe originalon 5 February 2007.Retrieved29 December2006.
  75. ^"Hallam Nebraska Tornado".Omaha/Valley, NE Weather Forecast Office. 2 October 2005.Retrieved8 September2006.
  76. ^Dr. Terence Meaden (2004)."Wind Scales: Beaufort, T – Scale, and Fujita's Scale".Tornado and Storm Research Organisation. Archived fromthe originalon 30 April 2010.Retrieved11 September2009.
  77. ^Storm Prediction Center."Enhanced F Scale for Tornado Damage".National Oceanic and Atmospheric Administration.Retrieved21 June2009.
  78. ^"Waterspout".American Meteorological Society.2009. Archived fromthe originalon 20 June 2008.Retrieved11 September2009.
  79. ^National Weather ServiceForecast Office,Burlington, Vermont(3 February 2009)."15 January 2009: Lake Champlain Sea Smoke, Steam Devils, and Waterspout: Chapters IV and V".Eastern Region Headquarters.Retrieved21 June2009.{{cite web}}:CS1 maint: multiple names: authors list (link)
  80. ^Glossary of Meteorology (2009)."Flash Flood".American Meteorological Society.Archived fromthe originalon 6 June 2011.Retrieved9 September2009.
  81. ^National Weather Service."Flood Products: What Do They Mean?".NOAA.Retrieved23 August2011.
  82. ^National Weather Service."Flash Flood".NOAA.Retrieved23 August2011.
  83. ^abNational Weather ServiceForecast OfficeColumbia, South Carolina(27 January 2009)."Downbursts..."National Weather ServiceEastern Region Headquarters.Retrieved9 September2009.
  84. ^Suphioglu C (1998). "Thunderstorm Asthma Due to Grass Pollen".Int Arch Allergy Immunol.116(4):253–260.doi:10.1159/000023953.PMID9693274.S2CID46754817.
  85. ^Taylor P.E., Jonsson H. (2004). "Thunderstorm asthma".Curr Allergy Asthma Rep.4(5):409–13.doi:10.1007/s11882-004-0092-3.PMID15283882.S2CID19351066.
  86. ^Dabrera G, Murray V, Emberlin J, Ayres JG, Collier C, Clewlow Y, Sachon P (March 2013)."Thunderstorm asthma: an overview of the evidence base and implications for public health advice".QJM.106(3):207–17.doi:10.1093/qjmed/hcs234.PMID23275386.{{cite journal}}:CS1 maint: multiple names: authors list (link)
  87. ^D'Amato G, Vitale C, D'Amato M, Cecchi L, Liccardi G, Molino A, Vatrella A, Sanduzzi A, Maesano C, Annesi-Maesano I (March 2016)."Thunderstorm-related asthma: what happens and why"(PDF).Clin Exp Allergy.46(3):390–6.doi:10.1111/cea.12709.PMID26765082.S2CID12571515.{{cite journal}}:CS1 maint: multiple names: authors list (link)
  88. ^abcdeAmerican Red Cross."Thunderstorm Safety Checklist"(PDF).American Red Cross.Retrieved24 August2011.
  89. ^abcdNational Weather Service Weather Forecast Office."Thunderstorm".Severe Weather Preparedness Information.Albuquerque, NM: NOAA.Retrieved24 August2011.
  90. ^Federal Emergency Management Agency."Thunderstorms and Lightning".Ready.US Department of Homeland Security. Archived fromthe originalon 23 June 2011.Retrieved24 August2011.
  91. ^abcFederal Emergency Management Agency."What to Do Before a Thunderstorm".US Department of Homeland Security. Archived fromthe originalon 20 August 2011.Retrieved24 August2011.
  92. ^abcdefghij"NWS Lightning Safety Myths".Lightningsafety.noaa.gov. 30 June 2014. Archived fromthe originalon 28 March 2015.Retrieved20 August2014.
  93. ^"NWS JetStream – Lightning Frequently Asked Questions".Srh.noaa.gov. 28 June 2014.Retrieved20 August2014.
  94. ^"You're not safer crouching: Six things you didn't know about lightning".LA Times.Retrieved20 August2014.
  95. ^National Geographic Almanac of Geography,ISBN0-7922-3877-X,page 75.
  96. ^"How many thunderstorms occur each year?".Thunderstorms.Sky Fire Productions. Archived fromthe originalon 11 July 2007.Retrieved23 August2006.
  97. ^National Weather ServiceJetStream (8 October 2008)."Tropical Cyclone Hazards".National Weather ServiceSouthern Region Headquarters.Retrieved30 August2009.
  98. ^David Roth."Unified Surface Analysis Manual"(PDF).Hydrometeorological Prediction Center.Retrieved22 October2006.
  99. ^Office of the Federal Coordinator for Meteorology (7 June 2001)."National Severe Local Storms Operations Plan – Chapter 2"(PDF).Department of Commerce.Archived fromthe original(PDF)on 6 May 2009.Retrieved23 August2006.
  100. ^Garner, Rob (26 June 2015)."Fermi Catches Antimatter-Hurling Storms".nasa.gov.Retrieved19 July2016.
  101. ^Ouellette, Jennifer (13 January 2011)."Fermi Spots Antimatter in Thunderstorms".Discovery News.Archived fromthe originalon 12 November 2012.Retrieved16 January2011.
  102. ^Alan Moller(5 March 2003)."Storm Chase Ethics".Retrieved9 September2009.
  103. ^Florida Institute of Technology(2 June 2009)."Scientists use high-energy particles from space to probe thunderstorms".Archived fromthe originalon 22 February 2023.Retrieved9 September2009.
  104. ^VORTEX2 (2009)."What is VORTEX2?".Archived fromthe originalon 25 November 2020.Retrieved9 September2009.{{cite web}}:CS1 maint: numeric names: authors list (link)
  105. ^Peter P. Neilley & R. B. Bent (2009)."An Overview of the United States Precision Lightning Network (USPLN)".American Meteorological SocietyFourth Conference on the Meteorological Applications of Lightning Data.Retrieved9 September2009.
  106. ^John D. Cox (2002).Storm Watchers.John Wiley & Sons, Inc. p.7.ISBN978-0-471-38108-2.
  107. ^"Martin Luther".Christian History. 8 August 2008.Retrieved6 July2016.
  108. ^Elkins-Tanton, Linda T. (2006).Jupiter and Saturn.New York: Chelsea House.ISBN978-0-8160-5196-0.
  109. ^Watanabe, Susan, ed. (25 February 2006)."Surprising Jupiter: Busy Galileo spacecraft showed jovian system is full of surprises".NASA. Archived fromthe originalon 8 October 2011.Retrieved20 February2007.
  110. ^Kerr, Richard A. (2000). "Deep, Moist Heat Drives Jovian Weather".Science.287(5455):946–947.doi:10.1126/science.287.5455.946b.S2CID129284864.
  111. ^Russell, S. T.; Zhang, T.L.; Delva, M.; et al. (2007). "Lightning on Venus inferred from whistler-mode waves in the ionosphere".Nature.450(7170):661–662.Bibcode:2007Natur.450..661R.doi:10.1038/nature05930.PMID18046401.S2CID4418778.

Further reading

  • Burgess, D. W., R. J. Donaldson Jr., and P. R. Desrochers, 1993:Tornado detection and warning by radar. The Tornado: Its Structure, Dynamics, Prediction, and Hazards, Geophys. Monogr.,No. 79,American Geophysical Union,203–221.
  • Corfidi, S. F., 1998:Forecasting MCS mode and motion.Preprints 19th Conf. on Severe Local Storms,American Meteorological Society,Minneapolis,Minnesota, pp. 626–629.
  • Davies J. M. (2004)."Estimations of CIN and LFC associated with tornadic and nontornadic supercells".Weather Forecast.19(4):714–726.Bibcode:2004WtFor..19..714D.doi:10.1175/1520-0434(2004)019<0714:eocala>2.0.co;2.
  • Davies, J. M., and R. H. Johns, 1993:Some wind and instability parameters associated with strong and violent tornadoes. Part I: Helicity and mean shear magnitudes. The Tornado: Its Structure, Dynamics, Prediction, and Hazards(C. Church et al., Eds.), Geophysical Monograph 79, American Geophysical Union, 573–582.
  • David, C. L. 1973:An objective of estimating the probability of severe thunderstorms.Preprint Eight conference of Severe Local Storms.Denver,Colorado,American Meteorological Society,223–225.
  • Doswell, C.A. III; Baker, D. V.; Liles, C. A. (2002)."Recognition of negative factors for severe weather potential: A case study".Weather Forecast.17:937–954.doi:10.1175/1520-0434(2002)017<0937:ronmff>2.0.co;2.
  • Doswell, C.A., III, S.J. Weiss and R.H. Johns (1993):Tornado forecasting: A review. The Tornado: Its Structure, Dynamics, Prediction, and Hazards (C. Church et al., Eds),Geophys. Monogr. No. 79, American Geophysical Union, 557–571.
  • Johns, R. H., J. M. Davies, and P. W. Leftwich, 1993:Some wind and instability parameters associated with strong and violent tornadoes. Part II: Variations in the combinations of wind and instability parameters. The Tornado: Its Structure, Dynamics, Prediction and Hazards, Geophys. Mongr.,No. 79, American Geophysical Union, 583–590.
  • Evans, Jeffry S.,:Examination of Derecho Environments Using Proximity Soundings.NOAA.gov
  • J. V. Iribarne and W.L. Godson,Atmospheric Thermodynamics,published by D. Reidel Publishing Company,Dordrecht,theNetherlands,1973
  • M. K. Yau and R. R. Rogers,Short Course in Cloud Physics, Third Edition,published by Butterworth-Heinemann, 1 January 1989,ISBN9780750632157ISBN0-7506-3215-1
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