An upper level disturbance prompted convection that produced locally heavy rain over extreme northeast Tennessee.
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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 prompted convection that produced locally heavy rain over extreme northeast Tennessee.
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 20, 6:33 AM EST, 2 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 733 AM EDT SAT JUL 20 2013 .AVIATION...SPOTTY SHOWERS AND TSRA GETTING AN EARLY START THIS MORNING...AND PASSING NEAR TRI AND TYS. IFR CONDITIONS BRIEFLY AT TRI THIS MORNING. COVERAGE LATER THIS AFTERNOON AND EVENING MAY JUST SKIRT THE TAF SITES...SO KEPT CONTINUITY WITH PREVIOUS SET OF TAFS FOR NOW. LIMITED TO VCTS/VCSH FOR TRI AND TYS WITH VCTS AND TEMPO SHOWERS AT CHA. MVFR OR LOWER CONDITIONS POSSIBLE BY 06Z TO 12Z SUNDAY...ESPECIALLY AT TRI. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 92 72 87 71 88 / 40 30 60 40 60 KNOXVILLE MCGHEE TYSON AIRPORT, TN 91 71 87 70 86 / 30 40 60 50 60 OAK RIDGE, TN 91 70 87 70 85 / 30 40 60 60 60 TRI CITIES AIRPORT, TN 89 66 85 66 85 / 30 40 60 50 60 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && TG
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 423 AM EDT SAT JUL 20 2013 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-210830- 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- 423 AM EDT SAT JUL 20 2013 /323 AM CDT SAT JUL 20 2013/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT... ISOLATED TO SCATTERED THUNDERSTORMS THIS AFTERNOON AND EVENING MAY BECOME STRONG TO SEVERE...BRINGING THE POSSIBILITY OF DAMAGING WINDS...HAIL UP TO AROUND 1 INCH IN DIAMETER...CLOUD TO GROUND LIGHTNING...AND LOCALLY HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY... THE COVERAGE OF THUNDERSTORMS WILL INCREASE ON SUNDAY AND EARLY NEXT WEEK...AS A WEAK COLD FRONT SLOWLY APPROACHES THE REGION AND STALLS OUT AROUND THE SOUTHERN APPALACHIANS. AS A RESULT...THE POSSIBILITY OF DAMAGING WINDS...LARGE HAIL...CLOUD TO GROUND LIGHTNING...AND LOCALLY HEAVY RAINFALL WILL ALSO INCREASE. HOWEVER...A SIGNIFICANT LARGE SCALE SEVERE WEATHER EVENT DOES REMAIN UNLIKELY AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS WEEKEND. TG/TD
The Knoxville radar (KMRX), 130 km away, was scanning. The volume nearest the first event began at 13:30 UTC.
1 flash flood. Local standard time, as filed.
Flooding was observed across Route 91 and surrounding hollows.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2013Every state in 2013This day in weather historyWarnings in Tennessee, July 2013
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: 467086.