As an area of showers and thunderstorms moved west to east across Middle Tennessee, flash flooding occurred across Maury County. This was the result of southerly flow surface and aloft ushering in deep atmospheric moisture across the mid state.
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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.
As an area of showers and thunderstorms moved west to east across Middle Tennessee, flash flooding occurred across Maury County. This was the result of southerly flow surface and aloft ushering in deep atmospheric moisture across the mid state.
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 Sep 20, 12:54 PM CST, 1 hour 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NASHVILLE TN 154 PM CDT SUN SEP 20 2009 .DISCUSSION... CURRENT...MOSTLY PULSE TYPE STORMS MOVING NE ACROSS MAINLY NW 1/2 OF CWA THIS AFTERNOON. LAREGER AREA OF CONVECTION POISED TO MOVE IN FROM W AND SW ASSOCIATED WITH H5 S/WV. TEMPS MAINLY IN 70S...BUT 80 REACHED WHERE SUNSHINE BROKE THRU. AFOREMENTIONED S/WV WILL MOVE NE AND INCREASE CONVECTION ACROSS CWA TONITE AND ANOTHER ONE WILL MOVE ACROSS EARLY MON. WE REMAIN VERY MOIST AND UNSTABLE...SO HAVE EXTENDED FLOOD WATCH IN TIME TO 12Z MON AND KEEPING PLATEAU OUT OF IT. MON NITE WILL BE DRY FOR MOST PART. THEN 40-50% POPS AS ANOTHER ROUND OF H5 IMPULSES MOVE IN...AS AT SAME TIME H5 RIDGE SHOWS SIGNS OF BUILDING. NW FLOW ON WED AND THU WILL ASSIST MOIST UNSTABLE AIR MASS FOR MORE CHANCES OF CONVECTION. ON FRI...L/WV TROF LEE OF ROCKIES WILL EJECT ENERGY NE WITH MAIN PORTION GOINNG INTO MIDWEST STATES BY SUN. OTHER IMPULSES WILL AFFECT CWA OVER WEEKEND WITH A POSSIBLE FRONT INTO CWA BY SUN. 40-50% POPS ONCE AGAIN. WILL BE UNSEASONABLY WARM INTO LATE WEEK WITH MID 80S LIKELY THE HIEST TEMPS REACHED. && .PRELIMINARY POINT TEMPS/POPS... NASHVILLE 70 81 68 84 / 70 60 30 50 CLARKSVILLE 68 82 66 83 / 70 30 30 50 CROSSVILLE 65 74 63 78 / 70 80 40 40 COLUMBIA 69 81 67 82 / 70 50 40 50 LAWRENCEBURG 68 80 67 83 / 70 50 40 50 WAVERLY 68 82 66 82 / 70 40 30 50 && .OHX WATCHES/WARNINGS/ADVISORIES... FLOOD WATCH THROUGH MONDAY MORNING FOR TNZ005>010-022>032- 056>064-075-077-093>095. && 17/MAG
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NASHVILLE TN 509 AM CDT SUN SEP 20 2009 TNZ011-033-034-065-066-078>080-211030- PICKETT-OVERTON-FENTRESS-WHITE-CUMBERLAND-WARREN-GRUNDY-VAN BUREN- 509 AM CDT SUN SEP 20 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT A HIGH PROBABILITY OF RAIN TODAY CONTINUES TO POSE A MINOR FLOODING THREAT DUE TO HIGH WATER LEVELS FROM PREVIOUS HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS AND LOCAL EMERGENCY MANAGEMENT OFFICIALS ARE ENCOURAGED TO REPORT HEAVY RAINFALL AMOUNTS TO THE NATIONAL WEATHER SERVICE IN NASHVILLE. TNZ005>010-022>032-056>064-075-077-093>095-211030- STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-BENTON-HOUSTON- HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-SMITH- JACKSON-PUTNAM-PERRY-HICKMAN-LEWIS-WILLIAMSON-MAURY-MARSHALL- RUTHERFORD-CANNON-DEKALB-BEDFORD-COFFEE-WAYNE-LAWRENCE-GILES- 509 AM CDT SUN SEP 20 2009 ...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT A FLOOD WATCH IS AGAIN IN EFFECT UNTIL THIS EVENING FOR ALL OF MIDDLE TENNESSEE GENERALLY WEST OF THE CUMBERLAND PLATEAU. A HIGH PROBABILITY OF RAIN TODAY CONTINUES TO POSE A FLOODING THREAT DUE TO HIGH WATER LEVELS FROM PREVIOUS HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS AND LOCAL EMERGENCY MANAGEMENT OFFICIALS ARE ENCOURAGED TO REPORT HEAVY RAINFALL AMOUNTS TO THE NATIONAL WEATHER SERVICE IN NASHVILLE. ROSE
The Nashville radar (KOHX), 78 km away, was scanning. The volume nearest the first event began at 20:37 UTC.
1 flash flood. Local standard time, as filed.
Numerous low-lying roads across the area, including a stretch of Knob Creek Road near State Route 7, were flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2009Every state in 2009This day in weather historyWarnings in Tennessee, September 2009
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: 196923.