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14 Cards in this Set
- Front
- Back
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Squall |
A line of thunderstorms that contains heavy precipitation, hail, frequent lightning, strong straight-line winds, and possibly tornadoes and waterspouts. |
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Thunderstorm |
A thunderstorm cell during its life cycle progresses through three stages: Cumulus, Mature and Dissipating |
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Cumulus Stage of thunderstorms |
The key feature of the cumulus stage is an updraft which varies varies in strength and extends from very near the surface to the cloud top. It is inadvisable to fly a UAS in or near cumulus clouds. |
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Mature Stage of cumulus Thunderstorms |
Precipitation beginning to fall from the cloud base is your signal that a downdraft has developed and a cell has entered the mature stage. Gusts and down drafts often are accompanied by Wind shear |
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Dissipating Stage of cumulus |
Downdrafts characterize the dissipating stage of the thunderstorm cell and the storm dies rapidly. When rain has ended and downdrafts have abated, the dissipating stage 'is complete. |
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Character of moist unstable air |
Cumuliform clouds and showery precipitation. |
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Character of stable air |
Stratiform clouds Poor visibility Precipitation
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Condition necessary for formation of cumulonimbus clouds are a lifting action and |
Unstable moist air |
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Clouds with greatest turbulence |
Cumulonimbus |
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Clouds with greatest turbulence |
Cumulonimbus |
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Clouds with greatest convection turbulence |
Towering cumulus |
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Clouds with greatest turbulence |
Cumulonimbus |
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Clouds with greatest convection turbulence |
Towering cumulus |
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Approximate AGL for base of cumuliform clouds when air temp is 82 and dew point is 38 |
10000 ft |
