Download - Thunderstorms & Tornadoes Chapter 10 Meteorology 1010 Professor Bunds Utah Valley University
Thunderstorms & Tornadoes
Chapter 10
Meteorology 1010Professor Bunds
Utah Valley University
Thunderstorm Types
• Air Mass– Occur within mT air– Uneven heating of the ground creates unstable
air (therefore common in afternoon)– Usually isolated storms & usually do not
produce strong winds, hail
• Severe– Involve uneven heating and lifting of warm air
by front or mountains– Usually occur in bands or groups– Can produce strong winds, hail, tornadoes
Average Number of Days per Year with Thunderstorms
Lots of air mass Lots of air mass T-stormsT-storms
Stages of Air Mass Thunderstorm Development
Cumulus Clouds – potential initiation of air Cumulus Clouds – potential initiation of air mass T-stormsmass T-storms
Developing Cumulonimbus
Gust Front in Severe Thunderstorm
Roll Cloud in Severe Thunderstorm
Roll Cloud in Severe Thunderstorm
Conditions for a Thunderstorm
Dryline
Squall Lineline of thunderstorms ahead of a cold front
Lightning!
Stages of a Lightning Strike
Tornadoes!
Damage Path from a Tornado
Supercell
Supercell
Development of a Tornado from a Mesocyclone
Multi-Vortex
Average Tornadoes per Year per 10,000 mi2 area
Fujita Intensity Scale
Fujita Intensity Scale
Number of Tornadoes-blue
Amount of Damage-red
Paths of Tornadoes
Tornado Forecasting
Watch-Conditions are Right
Warning-Tornado has been Spotted!
Doppler Radar
Doppler Effect
Tornado OutbreakApril 14 – 16, 2011
• 62 Tornados Saturday Night Alone
• 200 in 3 Days
• Multiple vortex systems
• www.Tornadovideos.net
Greensboro, N.C.
Charleston S.C.
Morehead, N.C.
Locations of Soundings in Following Slides
Morehead North Carolina 04/17/2011 00 UTC
Charleston South Carolina 04/17/2011 00 UTC
Greensboro Carolina 04/17/2011 00 UTC