Alert archive / Tennessee / Flash Flood Warnings in 2011

Flash Flood Warning 45, NWS Nashville, TN

September 4, 2011Benton County, Houston County, Humphreys County, Tennessee

NWS Nashville, TN issued this flash flood warning at Sep 4, 2011, 6:38 PM CDT for Benton County, Houston County, Humphreys County, 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 outline as issued.

The facts

Issued
Sep 4, 2011, 6:38 PM CDT (23:38 UTC)
Expired
Sep 4, 2011, 10:45 PM CDT
In force
4 hr
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Flood severity
None

Counties Benton County, TN, Houston County, TN, Humphreys County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.6 hours before the alert went out and 108 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2011-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 658 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2011-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
658 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1398 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

501 
WGUS54 KOHX 042338
FFWOHX
TNC005-083-085-050530-
/O.NEW.KOHX.FF.W.0045.110904T2338Z-110905T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
638 PM CDT SUN SEP 4 2011

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HOUSTON COUNTY IN MIDDLE TENNESSEE...
  NORTHERN BENTON COUNTY IN MIDDLE TENNESSEE...
  NORTHWESTERN HUMPHREYS COUNTY IN MIDDLE TENNESSEE...

* UNTIL 1230 AM CDT

* AT 637 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
  AREA OF VERY HEAVY RAINFALL ACROSS THE WARNED AREA. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. FLASH FLOODING IS EXPECTED TO OCCUR OVER MAINLY RURAL AREAS
  OF HOUSTON...NORTHERN BENTON AND NORTHWESTERN HUMPHREYS COUNTIES...
  INCLUDING THE TOWN OF BIG SANDY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

&&

LAT...LON 3612 8815 3623 8810 3631 8785 3624 8779
      3634 8759 3634 8753 3633 8751 3631 8752
      3615 8779

$$

ROSE
1 follow-up statement
071 
WGUS74 KOHX 050345
FFSOHX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1045 PM CDT SUN SEP 4 2011

TNC005-083-085-050359-
/O.CAN.KOHX.FF.W.0045.000000T0000Z-110905T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BENTON TN-HOUSTON TN-HUMPHREYS TN-
1045 PM CDT SUN SEP 4 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHWESTERN
HUMPHREYS...HOUSTON AND NORTHERN BENTON COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3612 8815 3623 8810 3631 8785 3624 8779
      3634 8759 3634 8753 3633 8751 3631 8752
      3615 8779

$$

ROSE

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 3, 11:32 PM CDTSpecial Weather StatementOHXMontgomery28 min
Sep 3, 11:34 PM CDTSevere Thunderstorm WarningOHXMontgomery26 min
Sep 4, 3:11 AM CDTFlash Flood WatchOHXBedford, Cannon, Coffee, Cumberland, DeKalb, Fentress and 11 more49 hr
Sep 4, 2:32 PM CDTSevere Thunderstorm WarningOHXFentress, Pickett28 min
Sep 4, 3:02 PM CDTSpecial Weather StatementOHXDeKalb28 min
Sep 4, 4:38 PM CDTSevere Thunderstorm WarningOHXCannon, DeKalb, Rutherford, Wilson37 min
Sep 4, 5:52 PM CDTFlash Flood WarningOHXHouston, Montgomery, Stewart3 hr

Nearby

Flash Flood Warnings in Tennessee, 2011Every flash flood warning in 2011

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.