This air mass is centered over northern Mexico and has very little influence on weather in the United States, since it rarely moves outside its source region.
What is continental tropical?
100
A storm that produces thunder and lightning.
What is a thunderstorm?
100
Air masses that form over water.
What is maritime?
100
A cold front.
100
An active cold front overtakes a warm front.
What is an occluded front?
200
This forms at the boundary between two different air masses.
What is a front?
200
A violent windstorm that forms a rotating column of air.
What is a tornado?
200
Continental polar air masses that cross the Great Lakes in the winter can bring these.
What are lake-effect snowstorms?
200
A warm front.
300
This type of air mass forms over land.
What is continental?
300
A tropical cyclone, in the United States.
What is a hurricane?
300
The area of most intense storm activity in a hurricane.
What is the eyewall?
300
A stationary front.
300
What hurricanes usually start out as.
What is a tropical disturbance/tropical storm?
400
This type of front forms when the flow of air is neither toward the warm air mass nor toward the cold air mass.
What is a stationary front?
400
The center of a hurricane, where there is no precipitation, little wind, and warm descending air.
What is the eye?
400
The cause of the greatest amount of damage from a hurricane.
What is the storm surge?
400
An occluded front.
400
Occluded fronts are associated with what type of pressure system?
low
500
How air masses are classified.
What is according to the surface over which they form (source region)?
500
The fuel for a hurricane.
What is the energy released through the condensation of large amounts of water vapor?
500
A vertical, spinning column of air, from which many tornadoes develop.
What is a mesocyclone?
500
A cold front using two air masses
500
The three stages of a thunderstorm.
What is the cumulus stage, the mature stage, the dissipating stage?