THUNDERSTORMSBrad Derrick

TypesThunderstorms are different every time though they may seem the same.

Types include single cells, multi-cells, squall lines, and super cells.

Single cells may have few strong effects.

Super cells well-known for strong tornadoes.

Single cells short-lived.

Microbursts may form in some storms.

Effects not certain until storm hits.

Single cells produce medium winds and small hail.

Multicells are capable of producing weak tornadoes.

Squall lines may produce strong tornadoes.

Supercells are famous for flash floods, large hail, violent winds and violent tornadoes.

Thunderstorms need 3 basic things to form.

Moisture is the main ingredient.

Lower air has to cool off quickly

Something needs to push moist air to where surrounding air is cold.

Tornadoes also need certain conditions to form.

The severity of a thunderstorm depends on what is coming from it.

Severe criteria: 58mph+ winds.

Severe criteria: Hail of more than 3/4 in. diameter.

Severe criteria: A tornado touches down.

Lightning isnt severe; all storms produce it.

+ Safety Precautions +Stay indoors, away from lightning.

Dont use plug-in electrical devices.

Dont use faucets or bathtubs during a storm.

Stay in a car if outside.

Dont get under a tree or touch downed power lines.

Tornadoes are rare in any given area.

Tornadoes are most commonly short lived.

Tornadoes move at an average speed of 35 miles per hour.

In 1905, Princeton, IN received 10.50 inches of rain in 24 hours.

In 1986, wind gusts of 100 mph blew over 200 homes in South Dakota.

1890: parts of Iowa receive 4 inches of hail, later drifting into 6 foot mounds and remaining for 26 days.

The End