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Area Forecast Discussion
Issued by NWS Knoxville/Tri Cities, TN

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000
FXUS64 KMRX 201520 AAA
AFDMRX

Area Forecast Discussion...UPDATED
National Weather Service Morristown TN
1120 AM EDT Wed Sep 20 2017

.DISCUSSION...
-- Changed Discussion --Showers are already developing just outside our area in SW VA and
srn WV, associated with an upper level low that will be drifting
SE through the day. The 12Z OHX sounding does not look promising
for much convection to develop with an inversion just above 850 mb,
but the 12Z RNK sounding appears more favorable with greater
moisture depth. Latest rapid update models show isolated coverage
of showers in SW VA and NE TN this afternoon, but less than the
current forecast PoPs would suggest. The update will lower PoPs to
a slight chance in that area, while maintaining the slight chance
mention in the Plateau. Temperatures have been slow to rise due to
valley fog this morning, which will require some adjustments to
hourly temp grids, but forecast high temps in the 80s across the
Valley appear on the right track.-- End Changed Discussion --

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...None.
TN...None.
VA...None.
&&

$$

DGS

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