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Flashcards in Severe Weather Notes Deck (12):
1

Thunder is the sound caused by

Rapid expansion of air along the lightning strikes

2

What percent of tornadoes happen in the US? What percent of thunderstorms become tornadoes?

75%,1%

3

How long are tornadoes and what is the average wind speed and spinning wind speed

Length: 8km long 10-60m wide
Wind speed120-180km/hr
Spinning winds up to 500 km/hr

4

Hurricane wind speed

At least 110 km/hr

5

Names for hurricanes in western pacific and Indian Ocean

Western: typhoons
Indian: cyclones

6

Diameter of a hurricane

160-1500 km

7

How do hurricanes form

A group of thunderstorms split by wind, energy is contained through condensation,

8

Strongest part of the hurricane and wind speeds

Eye wall
Up to 300 km/hr

9

Storm surge height

8 m high
160 km long

10

The storm surge has its greatest height right before it crashes into the

Shore

11

Thunderstorms are caused when

Warm, moist air rises

12

Lightning happens when

An electric discharge that takes place between a
Positively charged area, and a negatively charged area