1. Thunderstorm - Wikipedia, The Free Encyclopedia thunderstorms were associated with the Thunderbirds, held by Native Americans to be a servant of the Great Spirit The Norse considered thunderstorms to occur when r went to beat on http://en.wikipedia.org/wiki/Thunderstorm

Thunderstorm From Wikipedia, the free encyclopedia Jump to: navigation search "Electrical storm" redirects here. For other uses, see Electrical storm (disambiguation) A typical thunderstorm A thunderstorm , also known as an electrical storm , a lightning storm thundershower or simply a storm is a form of weather characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder The meteorologically-assigned cloud type associated with the thunderstorm is the cumulonimbus . Thunderstorms are usually accompanied by strong winds heavy rain and sometimes snow sleet hail , or no precipitation at all. Those which cause hail to fall are known as hailstorms. Thunderstorms may line up in a series or rainband , known as a squall line . Strong or severe thunderstorms may rotate, known as supercells . While most thunderstorms move with the mean wind flow through the layer of the troposphere that they occupy, vertical wind shear dew point , water droplets and ice form and begin falling the long distance through the clouds towards Earth's surface. As the droplets fall, they collide with other droplets and become larger. The falling droplets create a downdraft of air that spreads out at Earth's surface and causes strong winds associated with thunderstorms. Thunderstorms can generally form and develop in any geographic location, perhaps most frequently within areas located at

2. USATODAY.com Contains information on types of thunderstorms, lightning, and precipitation. http://www.usatoday.com/weather/resources/basics/thunderstorms.htm

OAS_listpos = "PageCount,AdOps1,Top728x90,Zaplet1,FloatBottom,Bottom728x90,VerticalBanner,Poster3,PosterBig,Links1,Links2"; Search How do I find it? Subscribe to paper Home News ... Weather Weather Cars Event tickets Jobs Real estate ... Online degrees Find a forecast: OAS_AD("PosterBig"); OAS_AD("VerticalBanner"); Resources: Thunderstorms Thunderstorms are one of the most common and most noticeable weather products of our atmosphere. They form worldwide, spit out deadly lightning, band together to form hurricanes, and can spin up the world's fastest winds inside tornadoes. The links below take you to information about the nature, structure and detailed studies of thunderstorms. Weather to watch Severe weather watches, warnings What watches and warnings mean Thunderstorm safety Learn all about severe weather Understanding lightning Understanding tornadoes Understanding floods, droughts Understanding hurricanes ... Understanding winter weather Scroll down this page for links to more information, beginning with types of thunderstorms and including thunderstorm dangers, history and science. Some of the links below are to Web sites that are not part of USATODAY.com, but which have authoritative information. A separate browser window will open for each outside page you wish to view. Types of thunderstorms What is a thunderstorm Multicells: How thunderstorms grow into clusters What makes a thunderstorm severe What's needed for powerful thunderstorms ... 'Dry' thunderstorms spark lightning, start fires

3. FEMA For Kids: Important Terms thunder won't hurt you lightning will! So it's important to pay attention when you hear thunder. thunderstorms happen in every state and every http://www.fema.gov/kids/thunder.htm

thunder won't hurt you - lightning will! So it's important to pay attention when you hear thunder. Thunderstorms happen in every state and every thunderstorm has lightning. Lightning can strike people and buildings and is very dangerous. Thunderstorms affect small areas when compared with hurricanes and winter storms. The typical thunderstorm is 15 miles in diameter and lasts an average of 30 minutes. Nearly 1,800 thunderstorms are happening at any moment around the world. their small size, all thunderstorms are dangerous. Every thunderstorm produces lightning, which kills more people each year than tornadoes. Heavy rain from thunderstorms can lead to flash flooding. Strong winds, hail, and tornadoes are also dangers associated with some thunderstorms. You can estimate how many miles away a storm is by counting the number of seconds between the flash of lightning and the clap of thunder. Divide the number of seconds by five to get the distance in miles. The lightning is seen before the thunder is heard because light travels faster than sound. (Of course, get safe shelter first, before you take the time to count the seconds!) Thunderstorms need three things: Moisture - to form clouds and rain.

4. Questions And Answers About Thunderstorms: Basics A supercell is an often dangerous convective storm with a very organized internal structure including a rotating updraft that allows it to keep going for up to several hours. http://www.nssl.noaa.gov/primer/tstorm/tst_basics.html

5. Thunderstorms Photos of the Single Cell, MultiCell Cluster and Multi-Cell Squall Line were taken by NSSL The photo of the Supercell was taken by Howie Bluestein http://weather.cod.edu/sirvatka/ts.html

THUNDERSTORMS There are three types of thunderstorms: single-cell (or air mass) multicell cluster multicell (or squall line) supercell Photos of the Single Cell, Multi-Cell Cluster and Multi-Cell Squall Line were taken by NSSL The photo of the Supercell was taken by Howie Bluestein The photos were taken from the storm spotters guide at the University of Illinois' Daily Planet web page. Although the natural environment does not fall into three distinct categories, we break them down to help illustrate significant differences. The differences arise because of varying atmospheric profiles, especially those concerned with vertical shear, defined as the change in wind velocity (speed or direction) with height, or The air mass thunderstorm is a common and usually non-severe phenomenon that forms away from frontal systems or other synoptic-scale disturbances. They form where moist and unstable conditions exist in the atmosphere. Air mass thunderstorms are usually produced in areas of very little vertical shear. As a result, the threat for severe is small. When they do reach severe limits, the thunderstorms may produce brief high winds or hail which develop because of high instability. These storms are know as pulse severe storms. Although several storm cells can develop, each individual cell lasts about 30-60 minutes and has three stages.

6. 7(t) Thunderstorms And Tornadoes Contains how thunderstorms are formed, with pictures of hail, lightning, and thunderclouds. http://www.physicalgeography.net/fundamentals/7t.html

FUNDAMENTALS eBOOK HOME FUNDAMENTALS eBOOK UNDERSTANDING ... Share CHAPTER 7: Introduction to the Atmosphere (t). Thunderstorms and Tornadoes Thunderstorms Thunderstorms form when moist, unstable air is lifted vertically into the atmosphere. Lifting of this air results in condensation and the release of latent heat . The process to initiate vertical lifting can be caused by: (1). Unequal warming of the surface of the Earth. Orographic lifting due to topographic obstruction of air flow. (3). Dynamic lifting because of the presence of a frontal zone Immediately after lifting begins, the rising parcel of warm moist air begins to cool because of adiabatic expansion. At a certain elevation the dew point is reached resulting in condensation and the formation of a cumulus cloud. For the cumulus cloud to form into a thunderstorm, continued uplift must occur in an unstable atmosphere. With the vertical extension of the air parcel, the cumulus cloud grows into a cumulonimbus cloud.

7. Thunderstorms, Tornadoes, Lightning Describes how these weather phenomenon are made in the atmosphere. http://www.nws.noaa.gov/om/brochures/ttl.pdf

8. Dog Owner's Guide: Thunderstorm Tips Fear of thunderstorms is quite common in dogs, and the onset of the fear can be obscure. Sometimes a dog is afraid from puppyhood; sometimes a particularly bad storm is connected http://www.canismajor.com/dog/thunder.html

[Dog Owner's Guide: Thunderstorm Tips (www.canismajor.com/dog/thunder.html)] Home Topics Index Newest ... About Thunderstorm tips BOOM! "Mom, Benji's under the bed again!" Benji paced the floor, whining ever so slightly at the distant rumbling. The weather report promised an afternoon and evening of storms, and the little dog was gearing up for his panic. He drooled and paced, stopping frequently to press himself against Marsha's legs. When the trembling started, Marsha picked him up and cuddled his shaking body. It would be a long evening. Lightning crackled and thunder roared as the storm began overhead, and Rover raced down the hallway and scrabbled under the bed. There he would stay till the fury subsided. Misty followed Robert from room to room, never letting him out of her sight. She didn't whine, shake, or run in terror from the sturm and drang of the storm, but she shadowed Robert whenever he moved. Fear of thunderstorms is quite common in dogs, and the onset of the fear can be obscure. Sometimes a dog is afraid from puppyhood; sometimes a particularly bad storm is connected to another fearful event in the dog's life; and sometimes the origin of the fear cannot be pinpointed. Puppies may pick up fear or discomfort with storms from their people, so it is important to develop a matter-of-fact attitude when dealing with a frightened youngster. Let the pup stay close, reassure him that he's fine, and coax him to play to divert his attention, but don't hover over him, stroke him incessantly, or cuddle him anxiously.

9. FEMA: Thunderstorms And Lightning thunderstorms and Lightning. Facts About thunderstorms; Facts About Lightning; How Can I Protect Myself From a Thunderstorm or Lightning? All thunderstorms are dangerous. http://www.fema.gov/hazard/thunderstorm/index.shtm

Skip to content FEMA.gov FEMA Mobile Site Contact Us ... Frequently Asked Questions or Additional Languages Search Advanced Search Home Apply for Assistance FEMA Audiences ... About FEMA Social Media FEMA Mobile Email Updates Facebook Twitter ... Print Preview Thunderstorms and Lightning Facts About Thunderstorms Facts About Lightning How Can I Protect Myself From a Thunderstorm or Lightning? Dry thunderstorms that do not produce rain that reaches the ground are most prevalent in the western United States. Falling raindrops evaporate, but lightning can still reach the ground and can start wildfires. Facts About Thunderstorms They may occur singly, in clusters, or in lines. Some of the most severe occur when a single thunderstorm affects one location for an extended time. Thunderstorms typically produce heavy rain for a brief period, anywhere from 3 minutes to an hour. Warm, humid conditions are highly favorable for thunderstorm development. Back To Top Facts About Lightning Lightning often strikes outside of heavy rain and may occur as far as 10 miles away from any rainfall. "Heat lightning" is actually lightning from a thunderstorm too far away for thunder to be heard. However, the storm may be moving in your direction!

10. Aviation Weather -Thunderstorms Find information on pilot training, tools for flight planning and scheduling, aircraft ride share and list of things to do http://www.pilotoutlook.com/aviation_weather/thunderstorms

11. Thunderstorms Contains information on the formation of a thunderstorm, types of thunderstorms, and lightning and thunder. http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/tstorm.html

12. BrainPOP - Animated Educational Site For Kids - Science, Social Studies, English Animated Science, Health, Technology, Math, Social Studies and English movies, comic strips, activity pages and school homework assistance via email for Kids. http://www.brainpop.com/science/weatherandclimate/thunderstorms/

Thunderstorms BAAROOOM — it’s a thunderstorm! In this electrifying movie, Tim and Moby show you all you need to know about these powerful weather events. What makes a regular cloud into a storm cloud? Where does lightning come from? Why does lightning sometimes strike the ground? You’ll get the answers to these questions and more! Ever wonder why lightning is jagged instead of straight? Tim will illuminate you. You’ll understand where thunder comes from, and what its connection to lightning is. And because they think you’re cool, Tim and Moby will give you some important tips for keeping safe in a storm. Don’t get caught out in the rain — learn your thunderstorms! show_flash("http://brainpop.speedera.net/www.brainpop.com/science/weatherandclimate/thunderstorms/screenshot.swf",329,246,""); About BrainPOP BrainPOP en Español BrainPOP Jr. - K-3 Movies, Homework Help, Games for Kids ... Join our Affiliate Program Can't see the movies? Download the Flash Plug-in here. Still need help? Click here. BrainPOP offers educational animated movies for kids. This Internet site provides information of a general nature and is designed for educational purposes only. Please carefully review our User Agreement and our before using this site. Your use of the site indicates your agreement to be bound by our

13. Thunderstorm Forecast Map - USATODAY.com Current forecasted thunderstorms for the continental United States. http://www.usatoday.com/weather/tstormpic/wtstormusa.htm

14. FEMA: Thunderstorms And Lightning Contains background information and a thunderstorm factsheet. http://www.fema.gov/hazard/thunderstorm/

Skip to content FEMA.gov FEMA Mobile Site Contact Us ... Frequently Asked Questions or Additional Languages Search Advanced Search Home Apply for Assistance FEMA Audiences ... About FEMA Social Media FEMA Mobile Email Updates Facebook Twitter ... Print Preview Thunderstorms and Lightning Facts About Thunderstorms Facts About Lightning How Can I Protect Myself From a Thunderstorm or Lightning? Dry thunderstorms that do not produce rain that reaches the ground are most prevalent in the western United States. Falling raindrops evaporate, but lightning can still reach the ground and can start wildfires. Facts About Thunderstorms They may occur singly, in clusters, or in lines. Some of the most severe occur when a single thunderstorm affects one location for an extended time. Thunderstorms typically produce heavy rain for a brief period, anywhere from 3 minutes to an hour. Warm, humid conditions are highly favorable for thunderstorm development. Back To Top Facts About Lightning Lightning often strikes outside of heavy rain and may occur as far as 10 miles away from any rainfall. "Heat lightning" is actually lightning from a thunderstorm too far away for thunder to be heard. However, the storm may be moving in your direction!

15. Thunderstorms Generous sponsorship of Windows to the Universe is provided by the Hewlett Foundation, the American Geological Institute, the American Geophysical Union, the National Science http://www.windows2universe.org/earth/Atmosphere/tstorm.html

16. MSU Extension Emergency Management -- Thunderstorms Click here to skip directly to thunderstorm links. thunderstorms In Michigan. Severe thunderstorms are storms accompanied by strong wind, lightning, heavy rain, and http://web1.msue.msu.edu/emergency/thunderstorms.html

MSU Extension Emergency Management Search The Site: Thunderstorms Click here to skip directly to thunderstorm links. Thunderstorms In Michigan Severe thunderstorms are storms accompanied by strong wind, lightning, heavy rain, and sometimes hail or tornadoes. These storms are possible at anytime in Michigan; however, most occur from May through September. Thunderstorms occur when the right conditions are present. This is when a layer of warm moist air meets a layer of cool dry air. This forms thunderhead clouds which are also known as Cumulonimbus clouds. These clouds are enormous and contain a large amount of energy and water. Hazards of Thunderstorms There are four main hazards that can occur during thunderstorms. These hazards are hail, lightning, tornadoes, and severe winds. Hail usually falls around the middle of the storm along with the heaviest rain. Hail stones can come in many sizes. Hail is usually pea to golf ball size, but it has been known to get as large as a baseball. Hail is formed when strong winds carry the rain above the freezing level. Eventually the hail gets to the point where it's too heavy for the wind to support and so it falls to the Earth. When the hail falls it causes damage to crops, automobiles, homes, wildlife, and can injure people. Lightning is a random occurrence of a thunderstorm's high level of energy. An intense electric field is present inside of a thunderstorm. When the force of the positive and negative energy inside the storm becomes great enough, lighting occurs. When this occurs it can heat the air around it to 50,000 degrees Fahrenheit. On average, lighting kills and injures more people a year then tornadoes and hurricanes.

17. Articles About Thunderstorms - Los Angeles Times thunderstorms News. Find breaking news, commentary, and archival information about thunderstorms from the Los Angeles Times http://articles.latimes.com/keyword/thunderstorms

18. BrainPOP | Science | Learn About Thunderstorms Animated Science, Health, Technology, Math, Social Studies, Arts Music and English movies, quizzes, activity pages and school homework help for K12 kids, aligned with state http://www.brainpop.com/science/weather/thunderstorms/

LOG IN SEARCH GO USERNAME: PASSWORD: GO Thunderstorms BAAROOOM — it’s a thunderstorm! In this electrifying movie, Tim and Moby show you all you need to know about these powerful weather events. What makes a regular cloud into a storm cloud? Where does lightning come from? Why does lightning sometimes strike the ground? You’ll get the answers to these questions and more! Ever wonder why lightning is jagged instead of straight? Tim will illuminate you. You’ll understand where thunder comes from, and what its connection to lightning is. And because they think you’re cool, Tim and Moby will give you some important tips for keeping safe in a storm. Don’t get caught out in the rain — learn your thunderstorms! Watch the Science movie about show_flash("http://brainpop.speedera.net/www.brainpop.com/new_common_images/flash_files/84248.swf", "163", "80", ""); Related Topics: Wind Natural Disasters Hurricanes Clouds ... See a Full List of Topics BrainPOP is a business name of FWD Media, Inc. Your use of the site indicates your agreement to be bound by our and

19. In The Clouds Photography - Weather Gallery (supercells) Supercell thunderstorms Supercell thunderstorms refer to thunderstorms which are rotating. Most, but not all, supercells rotate cyclonically (counterclockwise in the northern http://www.inclouds.com/Wx/supercell.html

PREV NEXT Home Gallery Information Search Feedback ... Photo Tips Supercell Thunderstorms: Supercell thunderstorms refer to thunderstorms which are rotating. Most, but not all, supercells rotate cyclonically (counter-clockwise in the northern hemisphere). Rotation is produced by wind shear (a change in wind speed and/or direction with height) and exists for the updraft portion or the entire scale of the storm (usually from a few to tens of kilometers horizontally and five to twelve kilometers vertically). Suggested Reading: Storms . ASTeR Press Inc. Tornado Alley. Monster Storms of the Great Plains . Oxford University Press Weather Gallery (Page 4 of 6): Supercell Thunderstorms PREV: NEXT: Tornadoes

20. Thunderstorm - Simple English Wikipedia, The Free Encyclopedia thunderstorms are small, intense weather systems that make strong winds, heavy rain, lightning, and thunder. thunderstorms can happen anywhere with two conditions the air near http://simple.wikipedia.org/wiki/Thunderstorm

Thunderstorm From Wikipedia, the free encyclopedia Jump to: navigation search Thunderstorm over Garajau, Madeira Thunderstorms are small, intense weather systems that make strong winds, heavy rain, lightning , and thunder . Thunderstorms can happen anywhere with two conditions : the air near the Earth 's surface must be warm and moist (with lots of liquid ), and the atmosphere must be unstable lightning bolts hit the earth every second, and at any one moment, about 1,800 thunderstorms happen around the earth. Contents Cycle Lightning Severe thunderstorms Benefits ... change Cycle Uusually there are more clouds in the afternoon than in early morning. This is because the ground has warmed up enough by the afternoon for strong winds to blow upward from the ground (these winds are called updrafts If there is very little moisture , an updraft has to go much higher before the water vapor condenses into a cloud . Sometimes the air can rise up as high as 5,000 to 10,000 feet (1,524 to 3,048 m) before a small cumulus cloud can condense from the invisible water vapor. High, puffy little clouds do not change until lots of moisture is added. This moisture helps the updraft. Moisture can add heat, which means the cloud will warm up inside and go up even faster. The moisture makes the cumulus cloud "mushroom" upwards and turn into a tall cumuls cloud. The winds inside this cloud are very strong.

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