| A | B |
|---|
| hurricane | a severe storm that develops over tropical oceans and whose strong winds of more than 120 km/h spiral in toward the intensly low-pressure storm center |
| tornado | a destructive, rotating column of air that has very high wind speeds and that may be visible as a funnel-shaped cloud |
| maritime polar | air masses are moist and cold |
| thunderstorm | a usually brief, heavy storm that consists of rain, strong winds, lightning, and thunder. |
| continental tropical | air masses are warm and dry |
| continental polar | air masses are cold and dry |
| maritime tropical | air masses are moist and warm |
| midlatitude cyclone | an area of low pressure that is characterized by rotating wind that movves toward the rising air of the central low-pressure region |
| squall line | a long line of heavy thunderstorms |
| anticyclone | the air sinks and flows outward from a center of high pressure |
