A hot, moist, and unstable airmass developed over much of Middle Tennessee during the afternoon hours on Saturday, August 14th, and lead to the development of an atmospheric environment that was conducive for thunderstorm development. Some of those thunderstorms that developed reached severe thresholds during the late afternoon through early evening hours across four counties in Middle…
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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 OHX wrote it up.
A hot, moist, and unstable airmass developed over much of Middle Tennessee during the afternoon hours on Saturday, August 14th, and lead to the development of an atmospheric environment that was conducive for thunderstorm development. Some of those thunderstorms that developed reached severe thresholds during the late afternoon through early evening hours across four counties in Middle Tennessee, resulting in strong downdrafts that produced damaging straight line 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 Nashville, TN wrote its last area forecast discussion before the first event at Aug 14, 5:28 PM CST, 47 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NASHVILLE TN 628 PM CDT SAT AUG 14 2010 .UPDATE... HUMID AND UNSTABLE CONDITIONS IN THE LOWER LEVELS WILL COMBINE WITH A WESTERLY UPPER DIFFLUENT FLOW TO PRODUCE SCT AFTERNOON AND EVENING THUNDERSTORMS. ACTIVITY SHOULD DIE OUT AFTER 06Z WITH 3-5 SM BR POSSIBLE TOWARD 12Z. && .AVIATION... && .PREV DISCUSSION... /ISSUED 518 PM CDT SAT AUG 14 2010/ MESOSCALE UPDATE...BROKEN LINE OF THUNDERSTORMS CURRENTLY MOVING ACROSS NORTHWEST MIDDLE TENNESSEE, WITH A LARGE OUTFLOW BOUNDARY RACING TOWARD THE NASHVILLE METRO AREA. ELSEWHERE ACROSS MIDDLE TENNESSEE, ISOLATED CELLS CONTINUE TO DEVELOP. LAPS ANALYSIS FROM 21Z SHOWS THE MOST UNSTABLE AIR LOCATED ACROSS THE UPPER CUMBERLAND PLATEAU, BACK ACROSS THE METRO AREA, THEN INTO WESTERN MIDDLE TENNESSEE. TBNA SHOWS BEST VELOCITIES ALONG THE OUTFLOW BOUNDARY OCCURRING IN ROBERTSON COUNTY, WITH VALUES OF 30-40 KTS AROUND 2,300 FT AGL. AT THE MOMENT, NO SEVERE WEATHER WARNINGS ARE IN EFFECT FOR MIDDLE TENNESSEE, ALTHOUGH SOME OF THE STORMS MAY STRENGTHEN FURTHER GIVEN THE MORE UNSTABLE AIR MASS THEY'RE MOVING INTO. PREV DISCUSSION... /ISSUED 324 PM CDT SAT AUG 14 2010/ SHORT TERM (THRU MON)... ISO TRW DEVELOPING IN MID AFTERNOON HEAT. IT IS VERY UNSTABLE IN W MID TN S/CAPES AROUND 4000 J/KG. MORE ORGANIZED AREA OF PCPN WITH MCV IN W KY PRODUCING BROKEN LINE TRW. SYS EXPECTED TO BUILD SE INTO NW MID TN BY LATE AFTERNOON. H8 WINDS TEND TO WEAKEN W/SYS THIS EVENING. EXPECT TO GET SOME STRONG-SEVERE STORMS NW QUAD OF MID TN THIS EVENING...TO I-65 CORRIDOR BEFORE SYS WEAKENS. SOME STORMS POSSBILE IN W MID TN S OF I-40 AS WELL. INC CHC OF PCPN TNGT. HEAVY DOWNPOURS WITH DAMAGING WINDS POSSIBLE. ANOTHER HOT DAY SUNDAY W/MAINLY SCT RW/TRW. HEAT ADVISORY FOR ONE MORE DAY ON TRACK. SFC HIGH PRES TRACKS ACR THE OH VLY MON AND PUSHES A FRONT INTO MID TN. SCT RW/TRW ATTM. LONG TERM (TUE-SAT)... LONG-TERM MODELS CONTINUES TO SHOW SFC LOW PRES TRACKING WEST ALONG THE GULF COAST TUE-WED THEN LIFTING NORTH. MOISTURE STREAMS INTO THE REGION. MAIN IMPACT LOOKS TO BE CLOUDS WITH POPS IN SLGT TO CHC RANGE ATTM. && .OHX WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY UNTIL 7 PM CDT SUNDAY FOR TNZ005>010-022>031- 056>064-075-077-093>095. && 21
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NASHVILLE TN 1207 PM CDT SAT AUG 14 2010 TNZ011-033-151030- PICKETT-OVERTON- 1207 PM CDT SAT AUG 14 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT...ACCOMPANIED BY STRONG TO DAMAGING WIND GUSTS...ALONG WITH BRIEF HEAVY DOWNPOURS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... EVEN THOUGH ANY SEVERE THUNDERSTORMS ARE EXPECTED TO BE BRIEF AND ISOLATED, SPOTTERS ARE ENCOURAGED TO CLOSELY MONITOR WEATHER CONDITIONS AND BE PREPARED TO CALL IN ANYTHING REACHING REPORTING CRITERIA. TNZ005>010-022>031-056-057-059-062-151030- STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-BENTON-HOUSTON- HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-SMITH- JACKSON-PERRY-HICKMAN-WILLIAMSON-RUTHERFORD- 1207 PM CDT SAT AUG 14 2010 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT SUNDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT...ACCOMPANIED BY STRONG TO DAMAGING WIND GUSTS...ALONG WITH BRIEF HEAVY DOWNPOURS. THE HEAT ADVISORY WILL ALSO CONTINUE FOR LOCATIONS GENERALLY ALONG AND WEST OF A DALE HOLLOW LAKE...TO SMITHVILLE...TO HILLSBORO LINE. MORE INFORMATION IS AVAILABLE ON THE INTERNET AT WEATHER.GOV OR BY LISTENING TO NOAA WEATHER RADIO. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A HEAT ADVISORY WILL BE IN EFFECT THROUGH EARLY SUNDAY EVENING FOR LOCATIONS GENERALLY ALONG AND WEST OF A DALE HOLLOW LAKE...TO SMITHVILLE...TO HILLSBORO LINE. SOME RELIEF FROM THE HEAT WILL OCCUR NEXT WEEK...BUT TEMPERATURES WILL STILL REMAIN ABOVE NORMAL. MORE INFORMATION IS AVAILABLE ON THE INTERNET AT WEATHER.GOV OR BY LISTENING TO NOAA WEATHER RADIO. .SPOTTER INFORMATION STATEMENT... EVEN THOUGH ANY SEVERE THUNDERSTORMS ARE EXPECTED TO BE BRIEF AND ISOLATED, SPOTTERS ARE ENCOURAGED TO CLOSELY MONITOR WEATHER CONDITIONS AND BE PREPARED TO CALL IN ANYTHING REACHING REPORTING CRITERIA. TNZ058-060-061-063-064-075-077-093>095-151030- LEWIS-MAURY-MARSHALL-CANNON-DE KALB-BEDFORD-COFFEE-WAYNE-LAWRENCE- GILES- 1207 PM CDT SAT AUG 14 2010 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT SUNDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED STRONG THUNDERSTORMS ARE POSSIBLE TODAY AND THIS EVENING. WIND GUSTS OF 30 TO 40 MPH...ALONG WITH BRIEF HEAVY DOWNPOURS... WILL OCCUR WITH THE STRONGER STORMS. THE HEAT ADVISORY WILL ALSO CONTINUE FOR LOCATIONS GENERALLY ALONG AND WEST OF A DALE HOLLOW LAKE...TO SMITHVILLE...TO HILLSBORO LINE. MORE INFORMATION IS AVAILABLE ON THE INTERNET AT WEATHER.GOV OR BY LISTENING TO NOAA WEATHER RADIO. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A HEAT ADVISORY WILL BE IN EFFECT THROUGH EARLY SUNDAY EVENING FOR LOCATIONS GENERALLY ALONG AND WEST OF A DALE HOLLOW LAKE...TO SMITHVILLE...TO HILLSBORO LINE. SOME RELIEF FROM THE HEAT WILL OCCUR NEXT WEEK...BUT TEMPERATURES WILL STILL REMAIN ABOVE NORMAL. MORE INFORMATION IS AVAILABLE ON THE INTERNET AT WEATHER.GOV OR BY LISTENING TO NOAA WEATHER RADIO. .SPOTTER INFORMATION STATEMENT... EVEN THOUGH ANY SEVERE THUNDERSTORMS ARE EXPECTED TO BE BRIEF AND ISOLATED, SPOTTERS ARE ENCOURAGED TO CLOSELY MONITOR WEATHER CONDITIONS AND BE PREPARED TO CALL IN ANYTHING REACHING REPORTING CRITERIA. TNZ032-034-065-066-078>080-151030- PUTNAM-FENTRESS-WHITE-CUMBERLAND-WARREN-GRUNDY-VAN BUREN- 1207 PM CDT SAT AUG 14 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED STRONG THUNDERSTORMS ARE POSSIBLE TODAY AND THIS EVENING. WIND GUSTS OF 30 TO 40 MPH...ALONG WITH BRIEF HEAVY DOWNPOURS... WILL OCCUR WITH THE STRONGER STORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... EVEN THOUGH ANY SEVERE THUNDERSTORMS ARE EXPECTED TO BE BRIEF AND ISOLATED, SPOTTERS ARE ENCOURAGED TO CLOSELY MONITOR WEATHER CONDITIONS AND BE PREPARED TO CALL IN ANYTHING REACHING REPORTING CRITERIA. SPOTTER THUNDERSTORM REPORTING CRITERIA... TORNADO FUNNEL CLOUD FLOODING HAIL >= 1/2 INCH WINDS > 50 MPH (MEASURED) STRUCTURAL DAMAGE TREES OR POWER LINES DOWN 31
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NASHVILLE TN 428 PM CDT SAT AUG 14 2010 TNZ005-142200- STEWART- 428 PM CDT SAT AUG 14 2010 ...SIGNIFICANT WEATHER ADVISORY FOR STEWART COUNTY... AT 428 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 8 MILES NORTH OF DOVER...MOVING SOUTHEAST AT 30 MPH. WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH BRIEF HEAVY RAINFALL...AND FREQUENT CLOUD TO GROUND LIGHTNING STRIKES. 31
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NASHVILLE TN 645 PM CDT SAT AUG 14 2010 TNZ028-150030- WILSON- 645 PM CDT SAT AUG 14 2010 ...SIGNIFICANT WEATHER ADVISORY FOR WILSON COUNTY... AT 643 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR LEBANON...MOVING EAST AT 10 MPH. WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS STORM. THIS STORM WILL MOVE ACROSS THE WILSON COUNTY FAIR AROUND 7 PM. 21
The Nashville radar (KOHX), 82 km away, was scanning. The volume nearest the first event began at 00:16 UTC.
2 thunderstorm wind, 1 hail. Local standard time, as filed.
A few trees were downed in Columbia.
Trees and power lines were downed in Carthage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2010Every state in 2010This day in weather historyWarnings in Tennessee, August 2010
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: 256630, 256631, 255066.