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Flashcards in Severe Weather Notes Deck (13):
1

Lightning happens when

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

2

Thunder is the sound caused by

Rapid expansion of air along the lightning strike

3

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

75%;1%

4

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

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

5

Hurricane wind speed

At least 110 km/hr

6

Names for hurricanes in the western pacific and Indian Ocean

Western pacific: typhoon
Indian Ocean:cyclone

7

Diameter of a hurricane

160-1500 km

8

How do hurricanes form

Begins as thunderstorms, winds split in different directions,energy is obtained from condensation of water vapor, once it hits warm ocean water, condensation fuels the hurricane

9

Strongest part of the hurricane and the wind speeds

Eye wall
Winds up to 300 km/hr

10

The names of hurricanes are assigned in advance for a ________ year cycle

6

11

Storm surge height

8 m high, 65-160 km long

12

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

Shore

13

Thunderstorms are caused when

Warm, moist air rises