A tropical cyclone that has winds 119 km/hr or higher.
What is a hurricane?
100
The Great Plains from parts of Texas to parts of South Dakota and Iowa.
Where if tornado alley?
100
It's a violent disturbance in the atmosphere.
What is a thunderstorm?
100
Winter
When do they occur?
100
They move fast.
Do cold fronts move fast or slow?
200
They form in the Atlantic, Pacific and Indian Oceans.
Where do they form?
200
It means that a tornado is possible in the area.
What is a tornado watch?
200
It is rapidly heated air expands suddenly and explosively creating the sound of an explosion.
What is thunder?
200
Crops or pipes can freeze or burst.
Name 1 thing that cold weather can damage.
200
They bring clouds and precipitation.
What do warm fronts bring?
300
It's from June till November.
When is hurricane season?
300
They usually form in spring or early summer, in the afternoon when the ground os warm.
When do tornadoes usually form?
300
It is a sudden spark or discharge as these charges jump between parts of the cloud and the ground.
What is lightning?
300
0 degrees Celsius.
At what degree does snow fall?
300
If they are stalled, then they can bring clouds and precipitation for days.
What happens if stationary fronts are stalled?
400
They begin over warm ocean water as a low pressure area, or tropical disturbance.
Where do they begin?
400
The cold air moves under the warm air forcing it to rise.
What happens when air masses meet?
400
They form in large cumulonimbus clouds.
How do they form?
400
It is when cold, dry air moves across warm water and then it becomes more humid as water vapor vibes from the lake surface and when the air reaches land and condenses, lake-effect snow falls.
What is lake-effect snow?
400
It means light rain or snow.
What does warm humid air mean in a warm front?
500
The eye is a ring of clouds, and the center of a hurricane.
What is an eye?
500
It is caused by strong winds and flying debris.
What is tornado damage?
500
Updrafts are upward winds and downdrafts are downward winds.
What are updrafts and downdrafts?
500
You have to find warm shelter and wear warm clothes.