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

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000 FXUS64 KMRX 220801 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 301 AM EST Wed Nov 22 2017 .SHORT TERM...
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(Today and Tonight)... Latest water vapor imagery and RAP upper air analysis indicate trough axis associated with Hudson Bay low extends south across the area this morning. As the trough shift east today and surface high pressure begins to build in, expect clearing skies and afternoon sunshine to help push the temperatures into the upper 40`s to middle 50`s across much of the area. Meanwhile higher terrain will see temperatures only reach into the lower 40`s by late afternoon. Mostly clear skies overnight tonight will lead to lows in the upper 20`s to lower 30`s across most of the area, or about 6-9 degrees below normal, by Thanksgiving morning. .LONG TERM...(Thursday through Tuesday)... It should be a relatively calm weather pattern through the long term period. Surface ridging should keep us dry and clear late this week. An upper-level shortwave trough will dig southward on Saturday bringing a cold front through the region. However, we should stay mostly dry on Saturday because of surface riding to our south inhibiting moisture return ahead of the front. High pressure builds in behind the cold front for Sunday and Monday with max temperatures 5-10 degrees below normal on Sunday. Monday morning will likely be the coldest morning with dry air in place, a clear sky, and high pressure centered over our area. By Tuesday, the surface ridge shifts to the east resulting in a warmer southerly flow and moisture return to the region ahead of the next front. $$
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&& .PRELIMINARY POINT TEMPS/POPS...
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Chattanooga Airport, TN 55 34 57 36 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 52 31 56 34 / 0 0 0 0 Oak Ridge, TN 51 31 55 33 / 0 0 0 0 Tri Cities Airport, TN 49 26 53 30 / 0 0 0 0
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&& .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && $$ EJH/JB

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