A humid air mass remained in place, while a frontal boundary was slowly approaching from eastern Kentucky. Nighttime convection resulted in flash flooding in southwestern Virginia.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MRX wrote it up.
A humid air mass remained in place, while a frontal boundary was slowly approaching from eastern Kentucky. Nighttime convection resulted in flash flooding in southwestern Virginia.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Morristown, TN wrote its last area forecast discussion before the first event at Aug 18, 7:34 PM EST, 2 hours 16 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Morristown TN 834 PM EDT Sat Aug 18 2018 .DISCUSSION... A few adjustments were made to the forecast to better match radar and satellite trends over the next few hours, but the forecast is generally on track through the overnight hours. Models indicate that any elevated convective activity overnight will be mainly in the southern half, which is reasonable given how the northern half has been worked over with rain this evening. Low clouds and fog are expected to blanket most of the area after midnight through sunrise. && .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && DGS
Hazardous Weather Outlook National Weather Service Morristown TN 319 PM EDT Sat Aug 18 2018 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-191930- Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins- Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen- Northwest Cocke-Cocke Smoky Mountains-Northwest Greene- Southeast Greene-Washington TN-Unicoi-Northwest Carter- Southeast Carter-Roane-Loudon-Knox-Jefferson-NW Blount- Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains- Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe- Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee- Wise-Scott-Russell-Washington- 319 PM EDT Sat Aug 18 2018 /219 PM CDT Sat Aug 18 2018/ This Hazardous Weather Outlook is for portions of Southwest North Carolina...East Tennessee and Southwest Virginia. .DAY ONE...This Afternoon and Tonight Scattered to numerous showers and thunderstorms are in the forecast through this evening. Some of the stronger storms could produce gusty winds and frequent cloud to ground lightning. In addition, deep moisture in the atmosphere could yield periods of heavy rainfall possibly resulting in isolated flash flooding. .DAYS TWO THROUGH SEVEN...Sunday through Friday Scattered showers and thunderstorms possible Sunday but not as widespread. Some of these storms may be strong with isolated wind damage and localized flooding possible. Our attention then turns toward another system that moves in on Monday and Tuesday. This storm system could produce another round of potential strong to severe thunderstorms. Once again, the primary threats will be isolated damaging winds and localized flooding. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Knoxville radar (KMRX), 134 km away, was scanning. The volume nearest the first event began at 02:52 UTC.
2 flash flood. Local standard time, as filed.
Flooding on Lee Hwy between Halls Bottom Rd and Oak Park Dr.
Water got into a home near the 16000 block of Wyndale Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Virginia in 2018Every state in 2018This day in weather historyWarnings in Virginia, August 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 782855, 782859.