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AMS SOL 6.6 part 3
| Term | Definition |
|---|---|
| Air Mass | a large body of air that has properties similar to the area of Earth over which it develops |
| Front | a boundary between two air masses of different density, moisture, or temperature |
| Cold Front | cold air advances toward warm air and pushes it up out of the way |
| Warm front | warm air advances over cold air |
| Stationary Front | occurs when the boundary between air masses stops advancing |
| occluded front | three different air masses come together |
| thunderstorms | cumulonimbus clouds, thunder, lightning, heavy rain, hail |
| lightning | occurs when electricity builds up in clouds |
| thunder | occurs with heated air expands and contracts quickly |
| tornado | a violent whirling wind that moves in a narrow path over land |
| Fujita scale | used to measure the strength of a tornado F0-F5 |
| amount of F4 and F5 tornados | less than 1% |
| hurricane | a large swirling low pressure system that forms over the Atlantic Ocean |
| typhoon | hurricane-like storm that forms in the Pacific ocean |
| cyclone | hurricane-like storm that forms in the Indian ocean |
| Blizzard | strong winds, low temperatures, poor visibility, blowing snow for at least 3 hours |
| Weather watch | conditions are favorable for a storm to develop |
| weather warning | severe weather conditions already exist so immediate action should be taken |
| meteorologist | a scientist who studies and predicts weather |
| forecast | a prediction of future weather conditions |
| station model | combination of symbols that show weather conditions at a specific location |
| isobar | a line on a weather map that connects points of equal pressure |
| isobars that are close together | indicates windy condition |
| isotherms | a line on a weather map that connects points of equal temperature |
| warm front symbol | red line with semicircles |
| cold front symbol | blue line with triangles |
| stationary front symbol | alternating red semicircles and blue triangles facing opposite directions |
| occluded front symbol | purple line with semicircles and triangles |
| center of station model | filled means overcast, half full means partly cloudy, clear means clear skies |
| temperature | written in the upper left corner of a station model |
| dew point | written in the lower left corner of a station model |
| air pressure | written in the upper right corner of a station model |
| flag pole | points in the direction the wind is coming from and represents 5mph |
| long flag | indicates 10mph |
| short flag | indicates 5mph |
| Large H | indicates the high pressure center on a weather map, clear weather |
| Large L | indicates the low pressure center on a weather map, bad weather |
| Tornado Alley | central USA |
Created by:
sford
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