A lone thunderstorm formed over the edge of the Cumberland Plateau producing convective gusts.
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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 lone thunderstorm formed over the edge of the Cumberland Plateau producing convective gusts.
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 Jul 8, 12:09 PM EST, 36 minutes earlier.
Area Forecast Discussion National Weather Service Morristown TN 109 PM EDT Sat Jul 8 2017 .AVIATION... Showers and thunderstorms are developing across the area ahead of a cold front this afternoon. With the exception of brief MVFR or IFR conditions within these showers and thunderstorms, VFR conditions are expected to be predominant. Behind the front, clearing conditions and light winds are forecast overnight with fog development possible between 09z-12z Sunday. Any fog should dissipate by about 14z Sunday with a mostly clear sky and VFR conditions during the day. && .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && JB
Hazardous Weather Outlook National Weather Service Morristown TN 305 AM EDT Sat Jul 8 2017 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-090715- 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- 305 AM EDT Sat Jul 8 2017 /205 AM CDT Sat Jul 8 2017/ This Hazardous Weather Outlook is for portions of Southwest North Carolina...East Tennessee and Southwest Virginia. .DAY ONE...Today and Tonight Scattered showers and thunderstorms will be across the area today. A few of these thunderstorms may be strong to severe, capable of damaging wind gusts and locally heavy rainfall. .DAYS TWO THROUGH SEVEN...Sunday through Friday No hazardous weather is expected. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated at this time.
Special Weather Statement
National Weather Service Morristown TN
122 PM EDT SAT JUL 8 2017
TNZ035-036-067-069-081800-
Anderson TN-Roane TN-Knox TN-Morgan TN-
122 PM EDT SAT JUL 8 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MORGAN...ANDERSON...
NORTHWESTERN KNOX AND NORTHEASTERN ROANE COUNTIES UNTIL 200 PM EDT...
At 121 PM EDT, Doppler radar was tracking a strong thunderstorm near
Oliver Springs, or near Oak Ridge, moving northeast at 20 mph.
Dime size hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Knoxville, Oak Ridge, Clinton, Kingston, Oliver Springs, Harriman,
Lake City, Oakdale, Coalfield, Rosedale, Karns, Dearmond, Bearden,
Powell, Petros and Frozen Head State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3588 8450 3608 8460 3621 8428 3619 8426
3618 8424 3618 8423 3623 8423 3624 8419
3623 8411 3593 8397
TIME...MOT...LOC 1721Z 246DEG 18KT 3600 8437The Knoxville radar (KMRX), 91 km away, was scanning. The volume nearest the first event began at 17:47 UTC.
1 thunderstorm wind. Local standard time, as filed.
A few trees were reported down on Wheeler Drive in Oliver Springs.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2017Every state in 2017This day in weather historyWarnings in Tennessee, July 2017
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: 704676.