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Mississippi River.....

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Old 02-16-2011 | 04:05 PM
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Default Mississippi River.....

....how in the hell does this river cause turbulence

"Memphis....blah blah blah 1234, chop 3-6-oh"

"Blah 1234...that will last for about 10 miles...associated with the river"
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Old 02-16-2011 | 05:05 PM
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Ever heard of lake effect snow, fog, or clouds?

Lots of water holds lots of heat. As the land surrounding cools, air over the river rises. Apparently, the air was pretty unstable as well to get to that altitude.
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Old 02-16-2011 | 05:05 PM
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I usually get chop when going from land over a nearby large lake. I presumed it was due to differing surface temps causing rising/falling air currents.

But that's <5K, don't know about FL 360.

Any geologist/wx geeks around?
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Old 02-16-2011 | 08:56 PM
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Originally Posted by FlyJSH
Ever heard of lake effect snow, fog, or clouds?

Lots of water holds lots of heat. As the land surrounding cools, air over the river rises. Apparently, the air was pretty unstable as well to get to that altitude.

I understand from a large lake, but a river? At 36?
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Old 02-16-2011 | 09:35 PM
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Same process as an air mass thunderstorm (but in your case there wasn't enough moisture to form a shower). They can build up over a field maybe a mile or so square and reach well into the flight levels. The Mississippi is close to a mile across south of Illinois, plenty of area to form a big thermal. If the lapse rate was great enough, the thermal would just keep rising.

Last edited by FlyJSH; 02-16-2011 at 09:50 PM.
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