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

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000 FXUS64 KMRX 231512 AAB AFDMRX Area Forecast Discussion...UPDATED National Weather Service Morristown TN 1112 AM EDT Sun Apr 23 2017 .DISCUSSION... A large area of a light to moderate, steady rain continue to over spread the region ahead of an approaching upper-level low pressure system. Latest model progs, including the HRRR, RAP, and NAM show this precipitation regenerating again this after as upper-level lift increases and the true cold front pushes in. As a result, an additional 2 to 3 inches of rainfall will be common across most of the region, particularly for areas along and east of I-75 across upper east Tennessee and southwest Virginia. This rain has lead to quite a bit of urban and stream flooding across our region, particularly across the Cumberland Plateau, Cumberland Mtns of SW Virginia -- and much of the central and southern Valley. While not necessarily "flashy" in nature, this steady rain of about 1/4 to 1/3 of an inch per hour is adding up and causing issues for the aforementioned creeks and streams -- and poor drainage/runoff areas in towns/cities. have handled the immediate concern with a Flood Advisory through 3 PM and will handle higher concerns with a warning as needed, reevaluating things in the afternoon. A watch will remain in effect for the entire daytime period -- and into the night across parts of our area. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 66 53 72 55 / 90 70 10 10 Knoxville McGhee Tyson Airport, TN 62 52 69 54 / 100 70 30 10 Oak Ridge, TN 59 52 70 54 / 100 60 20 10 Tri Cities Airport, TN 59 49 67 51 / 100 90 50 30 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...Flash Flood Watch until 8 PM EDT this evening for Cherokee-Clay. TN...Flash Flood Watch through late tonight for Cocke Smoky Mountains- Hamblen-Hancock-Hawkins-Jefferson-Johnson-North Sevier- Northwest Carter-Northwest Cocke-Northwest Greene-Sevier Smoky Mountains-Southeast Carter-Southeast Greene-Sullivan- Unicoi-Washington TN. Flash Flood Watch until 8 PM EDT /7 PM CDT/ this evening for Anderson-Bledsoe-Blount Smoky Mountains-Bradley-Campbell- Claiborne-East Polk-Grainger-Hamilton-Knox-Loudon-Marion- McMinn-Meigs-Morgan-NW Blount-Northwest Monroe-Rhea-Roane- Scott TN-Sequatchie-Southeast Monroe-Union-West Polk. VA...Flash Flood Watch through late tonight for Lee-Russell-Scott- Washington-Wise. && $$ AMP

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