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

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491 FXUS64 KMRX 260709 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 309 AM EDT Thu Apr 26 2018 .SHORT TERM...(Today and Tonight)...An upper-level shortwave rotates through the area today. This system will bring increasing rain chances through the day as swings through. Rain will first spread into the southern valley this morning and progress northeastward through the day. Rain and clouds will keep temperatures below normal again with highs in the lower to mid 60s, which is around 5 to 10 degrees below normal. Minimal CAPE values across the southern most areas later this afternoon so only a slight chance for a thunderstorm or two. Just good ole fashion spring rains for most. This system begins to exit to our east overnight and rain chances decrease. Clouds will hang in for most of the night, keeping temperatures mild. Lows will be in the mid to upper 40s which is near normal. Total rainfall for today and tonight looks to be around half an inch across the central and southern valley and around one quarter of an inch for areas north of I-40. If we can make it through today, better days lie ahead! .LONG TERM...(Thursday through Tuesday)...Models in decent agreement overall for the long term, and it should be a fairly tranquil period overall. Forecast confidence is above average for this time of year. May be a few lingering showers mainly northeast early Friday. Cooler air pushing in on northwest winds and some additional weak short wave energy moving through the mid/upper level Eastern US trough should keep some clouds around especially northeast for Friday into Saturday, but moisture looks limited enough to keep precip out of the forecast once the Friday morning showers end. By Sunday, a mid/upper level ridge will be building in, and the remainder of the forecast through Wednesday looks dry with a warming trend. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 63 50 73 50 / 90 60 10 0 Knoxville McGhee Tyson Airport, TN 63 50 71 48 / 80 60 10 10 Oak Ridge, TN 63 49 72 49 / 80 60 10 10 Tri Cities Airport, TN 66 48 69 45 / 60 70 20 10 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && $$ SR/LW

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