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| an immense body of air usually 1600 km (1000 miles) across. |
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| the conditions experienced in an area as an air mass passes over it. |
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| originate in high latitudes, cold |
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| originate in low latitudes, hot |
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| snow showers associated with a continental-polar air mass to which moisture and heat are added from below as the air mass moves over a relatively warm lake |
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| describes weather associated with maritime polar air from N. Atlantic into the Northeast and mid-Atlantic regions. Strong winds, freezing temperatures, and precipitation follow. |
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| boundary that separates different air masses, one warmer than the other and often having a higher moisture content. |
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| generally applied to warmer air gliding up along a colder air mass |
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| when the surface position of a front moves so that warm air occupies territory formerly covered by cooler air. Gentle slope. |
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| when dense cold air is actively advancing into a region occupied by warmer air, propelling warm air very high up. |
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| the surface position of the front does not move. The flow on either side of the boundary is nearly parallel to the position of the front. |
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| an active cold front overtakes a warm front. |
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| a storm that generates lightning and thunder |
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| a violent windstorm that takes the form of a rotating column of air |
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| vertical cylinder of rotating air that develops in the updraft of a severe thunderstorm. |
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| enhanced fujita intensity scale (EF Scale) |
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| commonly used guide for tornado intensity |
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| alert the public of the possibility of tornadoes over a specific area for a time interval |
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| issued by local offices of the NWS when a tornado has been sighted in an area or Is indicated by weather radar. |
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| weather radar that can detect motion directly as well as normal radar things |
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| intense center of low pressure that forms over tropical oceans and are characterized by intense convective activity and strong cyclonic circulation |
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| doughnut shaped wall of intense convective activity surrounding the center of the storm |
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| the very center of a hurricane |
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| when a cyclone’s strongest winds do not exceed 61 km (28 m)/h |
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| when winds are between 61 and 119 km (38-74 m)/h. Given a name at this point. |
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| saffir simpson hurricane scale |
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Definition
| a scale from 1-5 used to rank the relative intensities of hurricanes. |
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Definition
| a dome of water that sweeps across the coast near the point where the eye makes landfall. |
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