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

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000 FXUS64 KMRX 231914 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 314 PM EDT Tue May 23 2017 .SHORT TERM (Today through tomorrow)... Majority of the precipitation is continuing to exit northeast through NE Tennessee and SW Virginia. A few very scattered showers could move through this evening, so will maintain low end precipitation chances through tonight. Mid to low level clouds will stick around tonight which will help keep temperatures similar to last night even though today`s daytime highs are several degrees colder. These mid and low level clouds should also help keep dense fog away overnight. Although if clouds do clear out a bit in a specific location visibilities could quickly drop, but widespread dense fog is not expected at this time. The lull in rainfall will only last till tomorrow morning before our next system starts to bring increased rain chances to the area again. Low pressure system will begin to move in and ahead of it a frontal boundary push through our area. Surface low will begin to increase in strength as it exits just to our north and this should cause locations in NE Tennessee and SW Virginia to see the highest precipitation chances and rainfall amounts in our forecast area. .LONG TERM (Wednesday Night through Tuesday)... Primary weather maker will be an H5 closed low digging southward down the upper Mississippi Valley through Wednesday before ejecting eastward across the Tennessee Valley through Thursday. This will bring periods of showers and isolated thunderstorms Tuesday night through Thursday evening, followed by a fair and warmer day Friday. But the progressive weather pattern will persist, with a new storm system moving through the Rockies into the Plains this weekend, tapping Gulf Moisture and bringing into east TN and vicinity waves of scattered convection Saturday and Sunday. A new deep upper low will move into the northern Plains and Great Lakes during the opening days of the new week, and the associated westerly flow across our region should reduce our rain chances next week while keeping temperatures close to normal. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 62 73 55 73 / 60 80 60 30 Knoxville McGhee Tyson Airport, TN 60 72 55 69 / 50 80 70 50 Oak Ridge, TN 60 73 55 70 / 60 70 60 50 Tri Cities Airport, TN 57 71 54 66 / 40 80 70 60 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && $$ ABM/GC

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