Alert archive / Tennessee / Flash Flood Watches in 2013
Flash Flood Watch 6, NWS Nashville, TN
NWS Nashville, TN issued this flash flood watch at Aug 12, 2013, 1:15 PM CDT for 39 counties in Tennessee. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Aug 12, 2013, 1:15 PM CDT (18:15 UTC)
- Expired
- Aug 13, 2013, 3:03 AM CDT
- In force
- 14 hr
- Issued by
- NWS Nashville, TN
- Flood severity
- None
All 39 counties
Bedford County, TN, Benton County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 29 km from the middle of the area, began a volume at 18:15 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 6.3 hours before the alert went out and 18 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1987 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 542 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.7
What forecasters said that day
The local office's own words before this flash flood watch went out, 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 this flash flood watch went out at Aug 12, 12:45 PM CDT, 30 minutes earlier.
Area forecast discussion, Aug 12, 12:45 PM CDT, 30 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NASHVILLE TN 1245 PM CDT MON AUG 12 2013 .UPDATE...FOR 18Z TAFS && .AVIATION... BANDS OF SHRA/TSRA ONGOING ACRS MIDDLE TN RIGHT NOW. INITIAL ACTIVITY FORMED IN ASSOCIATION WITH MCV WHICH MOVED ACRS KY/NORTHERN TN. NEW ACTIVITY IS FORMING PRIMARILY ALONG OUTFLOW FROM EARLIER CONVECTION...WITH SOME ADDITIONAL STORMS POPPING AS CONVECTIVE TEMPS ARE REACHED IN THE STILL VERY WARM SOUTHERN PART OF OUR AREA. BEST CHC FOR THUNDER IN THE NEAR TERM AT CSV WHERE A TEMPO IS CARRIED. WILL CARRY A CB CLOUD GROUP AT BNA AS WELL AS NEW ACTIVITY COULD BE CLOSE LATER THIS AFTN. MAIN ACTION AT THE TAF SITES LOOKS TO BE THIS EVENING AT BNA/CKV AND AROUND MIDNIGHT AT CSV AS STRONG SHORTWAVE CURRENTLY OVER MO APPROACHES. WILL CARRY TEMPO THUNDER AT ALL AIRPORTS AS WE EXPECT FAIRLY WIDESPREAD ACTIVITY AHEAD OF THIS FEATURE. LATER TONIGHT/WED MORNING A COLD FRONT WILL APPROACH SHIFTING OUR WINDS TO THE NW. WILL LIKELY BE SOME MVFR CEILINGS ALONG AND BEHIND THIS FRONT. && .PREV DISCUSSION... /ISSUED 1110 AM CDT MON AUG 12 2013/ UPDATE...WITH THE EXPECTATION OF MOSTLY CLOUDY SKIES THIS AFTERNOON, A COOLING THRUST OF THUNDERSTORMS THIS MORNING, AND THE DEVELOPMENT OF MORE SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS THIS AFTERNOON, WILL LOWER MAX TEMP EXPECTATIONS OVER NORTHERN AREAS AND KEEP THEM CORRALLED MAINLY IN THE LOWER AND MIDDLE 80S. OTHERWISE, PLAN TO KEEP CURRENT FORECAST FOR TODAY PRETTY MUCH AS IT IS. && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && 99
Hazardous weather outlook, Aug 12, 5:00 AM CDT, 8 hours 15 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NASHVILLE TN 500 AM CDT MON AUG 12 2013 TNZ005>011-022>034-056>066-075-077>080-093>095-131000- STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON- HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE- SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS- WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-CANNON-DE KALB-WHITE- CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE- GILES- 500 AM CDT MON AUG 12 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS THE MID STATE THROUGH TONIGHT. SOME OF THESE THUNDERSTORMS COULD BECOME STRONG WITH THE POTENTIAL FOR HEAVY RAINFALL. THIS COULD LEAD TO AT LEAST MINOR FLOODING OF LOW LYING...TYPICAL FLOOD PRONE LOCATIONS AND ACROSS LOCATIONS THAT RECEIVED SUBSTANTIAL RAINFALL FROM THE PREVIOUS DAYS....INCLUDING THE INTERSTATE 40 CORRIDOR...FROM AROUND DICKSON...OVER TO AROUND NASHVILLE... COOKEVILLE AND CROSSVILLE...AS WELL AS PORTIONS OF NORTHWESTERN MIDDLE TENNESSEE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED TO CONTINUE THROUGH TUESDAY NIGHT. SOME OF THESE THUNDERSTORMS COULD BECOME STRONG WITH THE POTENTIAL FOR HEAVY RAINFALL...WHICH COULD LEAD TO MINOR FLOODING. .SPOTTER CALL TO ACTION STATEMENT... SPOTTERS AND LOCAL EMERGENCY MANAGEMENT OFFICIALS ARE ENCOURAGED TO REPORT HEAVY RAINFALL AMOUNTS TO THE NATIONAL WEATHER SERVICE IN NASHVILLE. 31
In the hours before
Special weather statement, Aug 12, 8:18 AM CDT, 4 hours 57 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NASHVILLE TN 818 AM CDT MON AUG 12 2013 TNZ005>007-023>026-121400- CHEATHAM-DICKSON-HOUSTON-HUMPHREYS-MONTGOMERY-ROBERTSON-STEWART- 818 AM CDT MON AUG 12 2013 ...SIGNIFICANT WEATHER ADVISORY FOR CHEATHAM...DICKSON...HOUSTON... HUMPHREYS...MONTGOMERY...ROBERTSON AND STEWART COUNTIES... AT 812 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM OAK GROVE TO WAVERLY...MOVING EAST AT 25 MPH. SOME LOCATIONS IN THE PATH INCLUDE WOODLAWN...ERIN...CUMBERLAND CITY...WAVERLY...PALMYRA...CLARKSVILLE...MCEWEN...CUNNINGHAM... SLAYDEN...VANLEER...CHEATHAM DAM AND CHARLOTTE. RAINFALL RATES OF ONE HALF TO ONE INCH PER HOUR WILL BE COMMON IN THESE AREAS. MINOR FLOODING IS POSSIBLE IN LOW-LYING AREAS. LAT...LON 3608 8741 3604 8799 3665 8744 3665 8688 ROSE
Special weather statement, Aug 12, 8:55 AM CDT, 4 hours 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
855 AM CDT MON AUG 12 2013
TNZ006-007-023>026-121445-
CHEATHAM-DICKSON-HOUSTON-HUMPHREYS-MONTGOMERY-ROBERTSON-
855 AM CDT MON AUG 12 2013
...SIGNIFICANT WEATHER ADVISORY FOR CHEATHAM...DICKSON...HOUSTON...
HUMPHREYS...MONTGOMERY AND ROBERTSON COUNTIES...
AT 852 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES EAST OF
GUTHRIE TO MCEWEN...MOVING EAST AT 20 MPH.
SOME LOCATIONS IN THE PATH INCLUDE CUNNINGHAM...SLAYDEN...MCEWEN...
ADAMS...VANLEER...CEDAR HILL...CHEATHAM DAM...CHARLOTTE...PLEASANT
VIEW...SPRINGFIELD...WHITE BLUFF AND ASHLAND CITY.
YOU CAN EXPECT HEAVY RAINFALL WITH THESE STORMS, WITH HOURLY RATES
AVERAGING ONE-HALF TO ONE INCH. MINOR FLOOD IS POSSIBLE IN LOW-LYING
AREAS.
LAT...LON 3610 8720 3605 8775 3665 8723 3665 8712
3665 8662Special weather statement, Aug 12, 9:28 AM CDT, 3 hours 47 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
928 AM CDT MON AUG 12 2013
TNZ007-008-026-027-121515-
CHEATHAM-DAVIDSON-ROBERTSON-SUMNER-
928 AM CDT MON AUG 12 2013
...SIGNIFICANT WEATHER ADVISORY FOR CHEATHAM...DAVIDSON...ROBERTSON
AND SUMNER COUNTIES...
AT 922 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES NORTH OF
SPRINGFIELD TO GREENBRIER TO ASHLAND CITY...MOVING EAST AT 25 MPH.
SOME LOCATIONS IN THE PATH INCLUDE SPRINGFIELD...ASHLAND CITY...
GREENBRIER...BEAMAN PARK...JOELTON...RIDGETOP...ORLINDA...BELLS
BEND...CROSS PLAINS...WHITES CREEK...WHITE HOUSE AND MILLERSVILLE.
FREQUENT LIGHTNING AND WINDS OF 40 TO 50 MPH ARE EXPECTED WITH THESE
STORMS. HOWEVER, THE PRIMARY THREAT REMAINS HEAVY RAINFALL. HOURLY
RAINFALL RATES OF AN INCH OR MORE ARE POSSIBLE IN MANY AREAS. MINOR
FLOODING IN LOW-LYING AREAS IS EXPECTED. BRIEF STREET FLOODING IN
URBAN AREAS IS ALSO POSSIBLE.
LAT...LON 3640 8646 3631 8654 3632 8655 3631 8657
3629 8656 3611 8672 3612 8717 3619 8715
3621 8718 3642 8700 3665 8695 3666 8659
3664 8656 3666 8651 3666 8642
ROSESpecial weather statement, Aug 12, 10:11 AM CDT, 3 hours 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1011 AM CDT MON AUG 12 2013
TNZ007>009-027>030-121600-
DAVIDSON-MACON-ROBERTSON-SMITH-SUMNER-TROUSDALE-WILSON-
1011 AM CDT MON AUG 12 2013
...SIGNIFICANT WEATHER ADVISORY FOR DAVIDSON...MACON...ROBERTSON...
SMITH...SUMNER...TROUSDALE AND WILSON COUNTIES...
AT 1008 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM PORTLAND TO
GALLATIN TO HERMITAGE...MOVING EAST AT 25 MPH.
SOME LOCATIONS IN THE PATH INCLUDE COTTONTOWN...OLD HICKORY...
MADISON...NASHVILLE...LAKEWOOD...HENDERSONVILLE...MITCHELLVILLE...
PORTLAND...GALLATIN...HERMITAGE...PERCY PRIEST LAKE AND MOUNT JULIET.
WINDS OF 30 TO 40 MPH ARE EXPECTED WITH THESE STORMS. HEAVY RAINFALL
ALSO REMAINS A THREAT. MINOR FLOODING IN LOW-LYING AREAS IS POSSIBLE.
LAT...LON 3664 8608 3637 8599 3609 8626 3612 8685
3641 8658 3666 8666 3666 8659 3664 8657
3666 8651 3666 8635
ROSELocal storm report, Aug 12, 10:55 AM CDT, 2 hours 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1055 AM CDT MON AUG 12 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1040 AM FLASH FLOOD 3 S WESTMORELAND 36.52N 86.25W
08/12/2013 SUMNER TN EMERGENCY MNGR
WATER RESCUE ON OLD WOLF HILL ROAD IN THE BRANSFORD
COMMUNITY
&&
EVENT NUMBER OHX1300662
MROSEThe office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 8:18 AM CDT | Special Weather Statement | OHX | Dickson, Houston, Montgomery | 42 min |
| Aug 12, 8:55 AM CDT | Special Weather Statement | OHX | Cheatham, Dickson, Robertson | 50 min |
| Aug 12, 9:28 AM CDT | Special Weather Statement | OHX | Cheatham, Davidson, Robertson, Sumner | 47 min |
| Aug 12, 9:30 AM CDT | Severe Thunderstorm Warning | OHX | Robertson, Sumner | 30 min |
| Aug 12, 9:52 AM CDT | Severe Thunderstorm Warning | OHX | Robertson, Sumner | 23 min |
| Aug 12, 10:11 AM CDT | Special Weather Statement | OHX | Davidson, Sumner, Trousdale, Wilson | 49 min |
| Aug 12, 11:52 AM CDT | Flash Flood Warning | OHX | Benton, Humphreys | 3 hr |
| Aug 12, 12:51 PM CDT | Flash Flood Warning | OHX | Lawrence | 3 hr |
| Aug 12, 2:40 PM CDT | Severe Thunderstorm Warning | OHX | Giles | 35 min |
| Aug 12, 3:55 PM CDT | Flash Flood Warning | OHX | Lawrence | 3 hr |
Nearby
Flash Flood Watches in Tennessee, 2013Every flash flood watch in 2013
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.