Ch. 3 Sec. 2 Storms

storm•violent disturbance

in atmosphere

thunderstorm• Form in large cumulonimbus clouds

• Produce strong upward & downward wind

(updrafts) (downdrafts)

lightning• sudden spark or energy discharge as charges jump between parts of cloud or between cloud & ground

How to stay safe during a

thunderstorm

Thunderstorm safetyAvoid touching metal objects b/c conduct electricityUse lightning rods on tall buildings

If outside find low area away from trees, fences & polesCrouch with head down & hands on kneesSafe in hard top car

Lightning causes around 100 deaths in the U.S. annually (more than

hurricanes and tornadoes combined). In this picture, the young

woman and her friends were severely injured by lightning just a few seconds after this picture was taken. Notice that no rain was falling, clearly illustrating that lightning can strike up to several miles away from the thunderstorm.

IF CAUGHT OUTDOORS: • If you feel your hair standing on end,

squat with your head between your knees. Do not lie flat!

Avoid touching telephones, electrical appliances, or plumbing

fixtures during a thunderstorm.

tornado• rapidly whirling, funnel-shaped cloud

• reaches down from storm cloud to touch Earth’s surface

tornado• Tornado alley-

middle part of USA

• Ranked on Fujita scale- F1F5

The safest place to be during a tornado is in the basement of a

well-built building.

hurricane• tropical storm

w/ winds 119 kph or higher

• begins over warm water as low pressure area or tropical disturbance

•eye of hurricane= winds grow calm & sky clears

hurricane

Hurricane Isabel

If you hear a hurricane warning and are told to evacuate, leave

the area immediately!

storm surge

• dome of water that sweeps across coast where hurricane lands

Hurricane Safety [02:53]

winter storms

lake-effect snow• Cold dry air moves

across warmer water & picks up water vapor

• When air reaches land & cools, lake-effect snow falls

Two of the snowiest cities in the U.S. are Buffalo &

Rochester in upstate New York.

If you are If you are caught in a caught in a snowstorm, snowstorm, try to find try to find

shelter from shelter from the wind.the wind.

storm surge

• dome of water that sweeps across coast where a __________landshurricane

tornado• rapidly whirling, funnel-shaped cloud

• reaches down from storm cloud to touch Earth’s surface

thunderstorm• Form in large cumulonimbus clouds

• Produce strong upward & downward wind

(updrafts) (downdrafts)

hurricane• tropical storm

w/ winds 119 kph or higher

• begins over warm water as low pressure area or tropical disturbance

• Cold dry air moves across warmer water & picks up water vapor

• When air reaches land & cools, lake-effect snow falls winter

storm

lake-effect snow