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Weather Stack
Air Masses, Fronts, Tornadoes , Hurricanes
| Term | Definition |
|---|---|
| air mass | a huge body of air with similar temperature, humidity and air pressure |
| front | where two air masses meet and do not mix |
| thunderstorm | disturbance in the earth's atmosphere involving lightning and thunder |
| Tornado Alley | area in central plains of the US where tornadoes are abundant |
| tornado watch | issued when the conditions are right for a tornado to occur |
| tornado warning | issued when a tornado has been spotted |
| Fujita Scale | used to rate tornadoes and their level of damage |
| Saffir-Simpson Scale | used to categorize hurricanes based on wind speed |
| vortex | the movement of a liquid or gas in a spiral around a central axis |
| storm surge | a massive wall of water that builds up at sea and blows in to land |
| tornado | violent windstorm that spirals around a rotating column of air |
| funnel cloud | rapidly, rotating cloud becomes a visible funnel at the base of a cloud |
| continental air mass | forms over land and associated with dry air |
| polar air mass | forms over polar regions and associated with cold air and high pressure |
| tropical air mass | forms over tropical areas and associated with warm air and low air pressure |
| maritime air mass | forms over oceans and brings humidity |
| occluded front | when a warm air mass is trapped between two cold air masses |
| warm front | when warm air slides over the cold, dense air |
| stationary front | when warm and cold front meet creates a "stand off" |
| cold front | cold, dry air slides under warm air and pushes it up |
| typhoon | a big rotating wind and rainstorm located in the Western Pacific Ocean |
| cyclone | a big rotating wind and rainstorm located in the Indian Ocean or off the coast of Australia |
| hurricane | a big rotating wind and rainstorm located in the Atlantic Ocean and eastern Pacific Ocean |