An upper level disturbance tracked across the region triggering isolated severe thunderstorms over east Tennessee during the afternoon hours. Storm reports were primarily for damaging winds.
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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.
An upper level disturbance tracked across the region triggering isolated severe thunderstorms over east Tennessee during the afternoon hours. Storm reports were primarily for damaging winds.
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 21, 8:26 AM EST, 4 hours 34 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 926 AM EDT TUE AUG 21 2007 .DISCUSSION...SHORT WAVE MOVING THROUGH UPPER RIDGE BRINGING ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS INTO THE AREA. ADDITIONAL DEVELOPMENT IS POSSIBLE THIS AFTERNOON WITH THE AID OF HEATING AND INCREASED INSTABILITY. HAVE UPDATES ZONES TO ADJUST TIMING OF PRECIP AND EXPAND COVERAGE SLIGHTLY. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 96 72 98 72 97 / 10 10 10 10 10 KNOXVILLE AIRPORT, TN 94 72 96 70 95 / 20 10 10 10 10 OAK RIDGE, TN 94 71 96 70 95 / 20 10 10 10 10 TRI CITIES AIRPORT, TN 90 68 92 67 92 / 30 20 20 10 10 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && MJB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 329 AM EDT TUE AUG 21 2007 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-220730- 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- 329 AM EDT TUE AUG 21 2007 /229 AM CDT TUE AUG 21 2007/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The Knoxville radar (KMRX), 52 km away, was scanning. The volume nearest the first event began at 17:57 UTC.
4 thunderstorm wind, 1 hail. Local standard time, as filed.
The sheriffs dispatch reported powerlines downed by thunderstorm winds on Coile Road and E Adair in Knoxville.
The sheriffs dispatcher reported a tree downed by thunderstorm winds on E Raccoon Valley and Martin Road.
The sheriffs office reported numerous trees downed by thunderstorm winds around the Church Hill area.
The county highway department reported one tree downed by thunderstorm winds on Cross Mountain Road near Mountain City.
The fire department chief reported quarter-size hail at the Pittman Center Fire Hall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2007Every state in 2007This day in weather historyWarnings in Tennessee, August 2007
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: 50744, 50745, 50746, 50747, 50748.