Chapter 10 thunderstorms and tornadoes
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Chapter 10: Thunderstorms and tornadoes. Thunderstorms Tornadoes Tornadic thunderstorms Severe weather and doppler radar. Thunderstorms. Ordinary cell thunderstorms. cumulus stage mature stage dissipating stage.

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Chapter 10: Thunderstorms and tornadoes

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Chapter 10 thunderstorms and tornadoes

Chapter 10: Thunderstorms and tornadoes

  • Thunderstorms

  • Tornadoes

  • Tornadic thunderstorms

  • Severe weather and doppler radar


Thunderstorms

Thunderstorms


Ordinary cell thunderstorms

Ordinary cell thunderstorms

  • cumulus stage

  • mature stage

  • dissipating stage

  • Ordinary cell thunderstorms are sometimes called‘air mass thunderstorms’, because they form in conditionally unstable air masses and are not necessarilyassociated with fronts or severe weather


Severe thunderstorms and the supercell

Severe thunderstorms and the supercell

  • multicell storms

  • supercell


Squall lines and mesoscale convective complexes

Squall lines and mesoscale convective complexes

  • multicell thunderstorm

  • squall line

  • mesoscale convective complex


Dryline thunderstorms

Dryline thunderstorms

  • dryline

  • these storms occur frequently in the southernGreat Plains of the US


Gust fronts microbursts and derechoes

Gust fronts, microbursts and derechoes

  • gust front

  • shelf cloud and roll cloud

  • outflow boundary

  • downbursts and microbursts

  • derecho

  • Microbursts present a severe hazard to aircraft, especially during takeoff and landing

  • Several airports have installed microburst detection instruments


Floods and flash floods

Floods and flash floods

  • flash floods


Distribution of thunderstorms

Distribution of thunderstorms

  • combination of warmth and moisture

  • geographical placement

  • “Tornado Alley” is home to most of the world’s tornadoes


Lightning and thunder

Lightning and thunder

  • lightning

  • thunder

  • According to the Guinness Book of World Records,Roy Sullivan holds the world’s record for being struckby lightning seven times between 1942 and his deathin 1983.


Electrification of clouds

Electrification of clouds

  • electrical charges in clouds

  • relationships of updrafts and downdrafts to electrical charges


The lightning stroke

The lightning stroke

  • cloud-to-ground lightning

  • stepped leader

  • return stroke

  • dart leader


Types of lightning

Types of lightning

  • forked lightning

  • ribbon lightning

  • dry lightning

  • heat lightning

  • St. Elmo’s fire

  • “heat lightning” isn’t really any different thanordinary lightning


Lightning detection and suppression

Lightning detection and suppression

  • lightning direction-finder


Tornadoes

Tornadoes


Tornado life cycles

Tornado life cycles

  • tornado

  • funnel cloud

  • dust-whirl stage

  • mature stage


Tornado outbreaks

Tornado outbreaks

  • tornado families

  • tornado outbreaks

  • Much ground-breaking research on tornadoes wasconducted by Professor Ted Fujita of the Universityof Chicago. The “F-scale” of tornado intensity wasnamed after him.


Tornado occurrence

Tornado occurrence

  • tornado alley

  • time of day

  • times of year


Tornado winds

Tornado winds

  • multi-vortex tornadoes

  • suction vortices


Seeking shelter

Seeking shelter

  • tornado watch

  • tornado warning

  • It’s always a good idea to know what to do if a tornado watch or warning is issued for your area


The fujita scale

The Fujita scale

  • tornado classification based on damage


Tornadic thunderstorms

Tornadic thunderstorms


Supercell tornadoes

Supercell tornadoes

  • mesocyclones

  • bounded weak echo region

  • hook echo

  • rotating clouds

  • wall cloud

  • A rotating wall cloud is an unforgettable sight - justask a successful storm chaser


Nonsupercell tornadoes

Nonsupercell tornadoes

  • gustnadoes

  • landspouts

  • cold air funnels


Severe weather and doppler radar

Severe weather and Doppler radar


Severe weather and doppler radar1

Severe weather and Doppler radar

  • Doppler shift

  • tornado vortex signature

  • Doppler lidar

  • NEXRAD

  • waterspout

  • Many cities in the US have multiple Doppler radars,operated by television station weather centers


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