Alert archive / Tennessee / Flash Flood Warnings in 2004

Flash Flood Warning 63, NWS Memphis, TN

September 12, 2004Decatur County, Tennessee

NWS Memphis, TN issued this flash flood warning at Sep 12, 2004, 6:00 PM CDT for Decatur County, Tennessee. It was in force for 3 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 12, 2004, 6:00 PM CDT (23:00 UTC)
Expired
Sep 12, 2004, 9:00 PM CDT
In force
3 hr
Issued by
NWS Memphis, TN
Area
Counties, with a storm outline in the text

County Decatur County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.0 hours before the alert went out and 148 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 2004-09-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 416 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 2004-09-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 square meters per square second.193958Sfc1 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
416 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
1012 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
113 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.

000 
WGUS54 KMEG 122304
FFWMEM
TNC039-130200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
600 PM CDT SUN SEP 12 2004

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DECATUR COUNTY IN TENNESSEE

* UNTIL 900 PM CDT

* AT 600 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED           
  THUNDERSTORMS WITH VERY HEAVY RAIN BETWEEN DECATURVILLE AND        
  SCOTTS HILL AND BATH SPRINGS.

* CITIES AFFECTED THROUGH 900 PM CDT INCLUDE...
  BATH SPRINGS AND SURROUNDING AREAS.

.A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
MOVE TO HIGHER GROUND IMMEDIATELY. DO NOT ATTEMPT TO CROSS FLOODED
ROADWAYS.

.DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.

.STAY TUNED TO THIS NATIONAL WEATHER SERVICE BROADCAST FOR THE LATEST
UPDATES AND INFORMATION. TO REPORT FLOODING ONLY...CALL 1 800 4 3 2 0
8 7 5.

LAT...LON 3558 8800 3550 8798 3544 8805 3540 8815
      3557 8815

$$

JCL

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 12, 12:53 PM CDTSevere Thunderstorm WarningMEGWeakley37 min
Sep 12, 2:07 PM CDTSevere Thunderstorm WarningMEGWeakley23 min
Sep 12, 2:46 PM CDTSevere Thunderstorm WarningMEGHardeman29 min
Sep 12, 3:25 PM CDTSevere Thunderstorm WarningMEGGibson35 min
Sep 12, 3:36 PM CDTFlash Flood WarningMEGHardeman114 min
Sep 12, 3:45 PM CDTSevere Thunderstorm WarningMEGHaywood30 min
Sep 12, 3:47 PM CDTSevere Thunderstorm WarningMEGCrockett28 min
Sep 12, 3:56 PM CDTSevere Thunderstorm WarningMEGFayette34 min
Sep 12, 4:19 PM CDTSevere Thunderstorm WarningMEGLauderdale26 min
Sep 12, 4:34 PM CDTSevere Thunderstorm WarningMEGTipton26 min
Sep 12, 4:42 PM CDTSevere Thunderstorm WarningMEGShelby33 min
Sep 12, 5:03 PM CDTSevere Thunderstorm WarningMEGTipton27 min
Sep 12, 5:09 PM CDTSevere Thunderstorm WarningMEGHaywood36 min
Sep 12, 5:15 PM CDTSevere Thunderstorm WarningMEGShelby30 min
Sep 12, 5:21 PM CDTSevere Thunderstorm WarningMEGDecatur24 min
Sep 12, 5:29 PM CDTSevere Thunderstorm WarningMEGTipton31 min
Sep 12, 5:33 PM CDTFlash Flood WarningMEGShelby3 hr

Nearby

Flash Flood Warnings in Tennessee, 2004Every flash flood warning in 2004

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.