ACUS11 KWNS 172150
SWOMCD
SPC MCD 172149
NCZ000-TNZ000-SCZ000-GAZ000-172345-

Mesoscale Discussion 2015
NWS Storm Prediction Center Norman OK
0449 PM CDT Mon Aug 17 2026

Areas affected...Eastern Tennessee into Western North Carolina

Concerning...Severe Thunderstorm Watch 590...

Valid 172149Z - 172345Z

The severe weather threat for Severe Thunderstorm Watch 590
continues.

SUMMARY...The threat for damaging winds will continue over the next
few hours as storms cluster across the area.

DISCUSSION...The development of numerous storms in a moist, unstable environment in the lee of the Appalachians have slowly clustered and
grown upscale this afternoon. Within a modestly favorable low-level
westerly shear environment (i.e., 0-3 km shear around 20-25 knots
per mesoanalysis and local VWPs), continued upscale growth and
organization is likely over the next few hours. As such, the threat
for damaging winds will persist as multiple clusters progress
eastward toward the higher terrain.

..Jirak.. 08/17/2026

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fjg!-Q7Qc6bBVINYcL6Erf_dU-BYepJcr-X7M0yaKRaJu58BOr3aSaMT7HlbxWuG6awmvZ0acEW6YMIui0m4Qdm1vkTb7uY$ for graphic product...

ATTN...WFO...RNK...GSP...MRX...FFC...

LAT...LON 35058544 35468475 35818397 36248316 36498231 36528187
36408154 36118147 35778174 35398223 35028285 34858357
34938437 34908468 35058544

MOST PROBABLE PEAK WIND GUST...55-70 MPH


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