Alert archive / Tennessee / Flash Flood Warnings in 2003

Flash Flood Warning 94, NWS Nashville, TN

August 6, 2003Williamson County, Tennessee

NWS Nashville, TN issued this flash flood warning at Aug 6, 2003, 2:03 PM CDT for Williamson 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
Aug 6, 2003, 2:03 PM CDT (19:03 UTC)
Expired
Aug 6, 2003, 5:00 PM CDT
In force
3 hr
Issued by
NWS Nashville, TN
Area
Counties, with a storm outline in the text

County Williamson County, TN

The radar

The Nashville radar (KOHX), 51 km from the middle of the area, began a volume at 19:05 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, 7.1 hours before the alert went out and 40 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 2003-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 127 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 2003-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
127 J/kg
Mixed-layer CIN
-110 J/kg
Mixed-layer LCL
1148 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KOHX 061908
FFWBNA
TNC187-062200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
203 PM CDT WED AUG 6 2003

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WILLIAMSON COUNTY IN TENNESSEE
  THIS INCLUDES THE CITY OF FRANKLIN

* UNTIL 500 PM CDT

* AT 200 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN OVER MUCH OF WILLIAMSON COUNTY. RAINFALL RATES HAVE
  BEEN 2 TO 2.5 INCHES PER HOUR. WEATHER RADAR INDICATED THAT
  TRACE CREEK IN NORTHERN WILLIAMSON COUNTY AND BEAR CREEK IN THE 
  SOUTHERN PART OF THE COUNTY HAVE RECEIVED THE MOST RAIN. MORE HEAVY 
  RAIN WILL ENTER WILLIAMSON COUNTY FROM NORTHERN HICKMAN COUNTY.

A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS OCCURRING OR
IMMINENT. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO
CROSS BRIDGES, DIPS, OR OTHER LOW SPOTS IF WATER COVERS THE ROAD.
NEVER TRY TO CROSS A FLOWING STREAM, EVEN A SMALL ONE, ON FOOT. TO
ESCAPE RISING WATER, MOVE TO HIGHER GROUND.

LAT...LON 3602 8715 3586 8721 3572 8670 3603 8667

$$
END/ORCHANIAN
1 follow-up statement
000 
WGUS74 KOHX 062233
FFSBNA
TNC081-187-062300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
533 PM CDT WED AUG 6 2003

...FLASH FLOOD WARNINGS FOR HICKMAN AND WILLIAMSON COUNTIES HAVE
EXPIRED...

THE HEAVY RAINFALL THAT BROUGHT THE THREAT OF FLASH FLOODING TO
HICKMAN COUNTY AND WILLIAMSON COUNTY HAS NOW MOVED SOUTH OF THE
AREA. THEREFORE...THE POTENTIAL FOR FLASH FLOODING NO LONGER
EXISTS.

HOWEVER...WITH THE ONGOING POTENTIAL FOR ISOLATED SHOWERS AND
THUNDERSTORMS TO STILL OCCUR...THE PONDING OF WATER ON ROADWAYS AND
MINOR FLOODING OF LOW LYING AREAS WILL STILL BE POSSIBLE.

LAT...LON 3658 8577 3645 8561 3656 8496 3693 8539

$$

21

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 10:21 AM CDTFlash Flood WarningOHXMaury3 hr
Aug 6, 12:40 PM CDTFlash Flood WarningOHXCannon3 hr
Aug 6, 12:55 PM CDTFlash Flood WarningOHXRutherford3 hr
Aug 6, 1:20 PM CDTFlash Flood WarningOHXLewis3 hr
Aug 6, 1:34 PM CDTSevere Thunderstorm WarningOHXHickman, Lewis41 min
Aug 6, 2:17 PM CDTFlash Flood WarningOHXHickman3 hr
Aug 6, 3:13 PM CDTSevere Thunderstorm WarningOHXBenton32 min
Aug 6, 3:46 PM CDTSevere Thunderstorm WarningOHXPerry, Wayne44 min
Aug 6, 3:50 PM CDTFlash Flood WarningOHXPerry3 hr
Aug 6, 4:13 PM CDTFlash Flood WarningOHXLewis3 hr

Nearby

Flash Flood Warnings in Tennessee, 2003Every flash flood warning in 2003

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.