ISU GEO 211 - Chapter 14- Thunderstorms/tornadoes (2 pages)

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Chapter 14- Thunderstorms/tornadoes



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Chapter 14- Thunderstorms/tornadoes

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Covers Chapter 14


Lecture number:
33
Pages:
2
Type:
Lecture Note
School:
Illinois State University
Course:
Geo 211 - Earth's Dynamic Weather
Edition:
1
Documents in this Packet

Unformatted text preview:

GEO 211 1st Edition Lecture 33 Outline of Last Lecture I Hurricane formation A Stages of development 1 Tropical disturbance 2 Tropical depression 3 Tropical storm 4 Hurricane B Saffirr Simpson scale for hurricanes potential damage Outline of Current Lecture II Chapter 14 Thunderstorms tornadoes A Thunderstorms B Life cycle of ordinary storms 1 Cumulus stage 2 Mature stage intense storm 3 Dissipation stage updrafts begin to weaken and collapse C Types of thunderstorms 1 Single cell 2 Multicell clusters 3 Multicell lines squall line 4 Supercell D Severe thunderstorms produce one or more of these Current Lecture II Chapter 14 Thunderstorms tornadoes A Thunderstorms Estimated 45 000 storms develop each day 16 million a year Tropical regions associated with ITCZ develop most thunderstorms In US most develop in Southeastern states Highest frequency in Florida These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute B Life cycle of ordinary storms 1 Cumulus stage initial stage updrafts dominate the cloud Dry air from surroundings mixes into a cloud called entrainment 2 Mature stage intense storm Begins when precipitation starts to fall Updrafts become organized and strong Updrafts and downdrafts exist side by side 3 Dissipation stage updrafts begin to weaken and collapse Downdrafts dominate cloud later C Types of thunderstorms 1 Single cell ordinary cell air mass thunderstorms widely scattered summer storms short lived doesn t produce severe weather 2 Multicell clusters 3 Multicell lines squall line 4 Supercell D Severe thunderstorms produce one or more of these Hail 1 inch in diameter or larger Tornadoes Wind gusts 58 mph or greater Updrafts downdrafts are titled Gust front boundary between dense cold downdrafts and warm updrafts



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