Alert archive / Tennessee / Areal Flood Warnings in 2012
Areal Flood Warning 1, NWS Nashville, TN
NWS Nashville, TN issued this areal flood warning at Sep 18, 2012, 2:51 AM CDT for 6 counties in Tennessee. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 18, 2012, 2:51 AM CDT (07:51 UTC)
- Expired
- Sep 18, 2012, 6:30 AM CDT
- In force
- 4 hr
- Issued by
- NWS Nashville, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bedford County, TN, Cannon County, TN, Coffee County, TN, Grundy County, TN, Van Buren County, TN, Warren County, TN
The radar
The Northeast Alabama radar (KHTX), 75 km from the middle of the area, began a volume at 07:52 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
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 7.9 hours before the alert went out and 280 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
- 405 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 220 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.2
What forecasters said that day
The local office's own words before this areal flood warning 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 areal flood warning went out at Sep 17, 11:53 PM CDT, 2 hours 58 minutes earlier.
Area forecast discussion, Sep 17, 11:53 PM CDT, 2 hours 58 minutes before
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</html>Hazardous weather outlook, Sep 17, 2:20 PM CDT, 12 hours 31 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NASHVILLE TN 220 PM CDT MON SEP 17 2012 TNZ008>011-027>034-058>066-075-077>080-093>095-181030- SUMNER-MACON-CLAY-PICKETT-DAVIDSON-WILSON-TROUSDALE-SMITH-JACKSON- PUTNAM-OVERTON-FENTRESS-LEWIS-WILLIAMSON-MAURY-MARSHALL- RUTHERFORD-CANNON-DE KALB-WHITE-CUMBERLAND-BEDFORD-COFFEE-WARREN- GRUNDY-VAN BUREN-WAYNE-LAWRENCE-GILES- 220 PM CDT MON SEP 17 2012 ...FLOOD WATCH IN EFFECT THROUGH TUESDAY MORNING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT AN AREA OF LOW PRESSURE WILL MOVE ACROSS MIDDLE TENNESSEE TODAY INTO TONIGHT...WITH WIDESPREAD RAIN AND ISOLATED TO SCATTERED THUNDERSTORMS SPREADING ACROSS THE AREA AND BECOMING HEAVY AT TIMES. RAINFALL TOTALS ARE EXPECTED TO RANGE FROM 2 TO 4 INCHES ALONG THE I-65 CORRIDOR...UP TO 3 TO 5 INCHES OVER EASTERN MIDDLE TENNESSEE AND THE CUMBERLAND PLATEAU. LOCALLY HIGHER RAINFALL AMOUNTS WILL BE POSSIBLE. ADDITIONALLY...ENOUGH AFTERNOON AND EARLY EVENING INSTABILITY MAY MOVE INTO SOUTHERN MIDDLE TN THIS AFTERNOON AND EVENING. AS A RESULT...THERE IS A SLIGHT POTENTIAL FOR STRONGER TO SEVERE THUNDERSTORMS TO DEVELOP. WITH THE STRONGER STORMS...FLASH FLOODING...WHICH IS FLOODING THAT CAN OCCUR VERY RAPIDLY...WILL BE A POSSIBILITY AS WELL. OTHERWISE...FLOODING OF LOW LYING AREAS AND TYPICALLY FLOOD PRONE AREAS IS LIKELY IN THE WATCH AREA. ALTHOUGH DRY SOIL CONDITIONS AND LOW RIVER LEVELS MAY HELP REDUCE THE THREAT OF WIDESPREAD FLOODING...LOCALIZED FLOODING WILL BE POSSIBLE. MORE INFORMATION IS AVAILABLE ON THE INTERNET AT WEATHER.GOV OR BY LISTENING TO NOAA WEATHER RADIO. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY 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>007-022>026-056-057-181030- STEWART-MONTGOMERY-ROBERTSON-BENTON-HOUSTON-HUMPHREYS-DICKSON- CHEATHAM-PERRY-HICKMAN- 220 PM CDT MON SEP 17 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT AN AREA OF LOW PRESSURE MOVING ACROSS MIDDLE TENNESSEE WILL BRING WIDESPREAD RAIN AND A FEW THUNDERSTORMS. RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE EXPECTED. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY 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. 21
In the hours before
Local storm report, Sep 17, 10:19 PM CDT, 4 hours 32 minutes before
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</html>Local storm report, Sep 17, 10:39 PM CDT, 4 hours 12 minutes before
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</html>Local storm report, Sep 17, 10:57 PM CDT, 3 hours 54 minutes before
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</html>Local storm report, Sep 18, 1:08 AM CDT, 1 hour 43 minutes before
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</html>Local storm report, Sep 18, 1:14 AM CDT, 1 hour 37 minutes before
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</html>Local storm report, Sep 18, 1:17 AM CDT, 1 hour 34 minutes before
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</html>The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 7:12 PM CDT | Flash Flood Warning | OHX | Clay, DeKalb, Fentress, Jackson, Overton, Pickett and 2 more | 6 hr |
| Sep 17, 7:58 PM CDT | River Flood Advisory | OHX | Bedford | 11 hr |
Nearby
Areal Flood Warnings in Tennessee, 2012Every areal flood warning in 2012
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.