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> Why does this thunderstorm have a cap to it?
post Feb 8 2008, 09:12 PM
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Take a good look at this picture and explin why this thunderstom has a cap to it.

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Laurel Highland's Historical Village N.P. Inc.

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post Feb 11 2008, 01:59 AM
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This will not be any kind of technical explanation.

My observation of Thunderstorm clouds, from the typical Florida afternoon T'storms, the top of the cloud does appear to flaten out into somewhat of an anvil shape at a high altitude.

With the picture you have displayed, it would appear it was taken on the very fringes between twilight and night and the backlighting is illuminating the fact of a very low and thick overhead cloud ceiling, as a part of the storm and as a part of the sky in general.

The telephone pole on the right side of the picure, gave me an initial vision of a funnel cloud, however, further examination reveals it to be what it is....whew!

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post Feb 11 2008, 02:05 PM
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It could be a temperature inversion at that level of the atmosphere. Or it could be that the thunderstorm ran into stable air at that altitude. But those reasons are kind of the same.

A layer of warm air could be situated where the thunderstorm hits a cap and spreads out. Since this layer of air is warmer than the thermals making the thunderstorm, the air cannot rise any further.

I think that's the right answer. Have to see if anybody agrees with me or not.
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