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National Weather Service Huntsville AL
255 AM CDT Thu Sep 29 2016
A cold front has moved south of the TN valley taking the isolated shra
with it. Otherwise a quiet wx pattern is expected for the next seven
days. However there are a couple of flies in the onitment for both
the short and long terms.
For the short term, today thru Saturday, expect cooler temps (highs
in the 70s and lows upper 40s/lower 50s) and mainly dry conditions. A closed upper low now over the Ohio valley is progged to move south
towards the TN valley over the next few days. Models are showing that
the center of the upper low will end up over KY by Friday before
drifting back north on Friday night and Saturday. This wx scenario
could make for a tricky fcst, especially with wrap arnd cloud
cover/temps and the chc for shra. Thunder looks unlikely during this
period due to a fairly stable airmass across the area.
See where the Upper Low is right now? Find the bullseye.
Picture this... You have this storm spinning "slowly" up in the atmosphere and its really cold at 20,000 feet... (10°F actually!).
Heat rises, Cold collapses... So This Upper Low in turn is mixing down to the mid levels and showing up on these maps... Take a look at the Mid Level temps. That's what you call a cool "pool" of air.
And here are the 9,000 foot temps... It's actually below freezing at that level.
Meanwhile sunny here with a few clouds. Rain is too far away. But breezy
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