Alert archive / Tennessee / Flash Flood Warnings in 2002

Flash Flood Warning 23, NWS Nashville, TN

March 20, 20025 counties in Tennessee

NWS Nashville, TN issued this flash flood warning at Mar 20, 2002, 1:31 AM CST for 5 counties in Tennessee. It was in force for 6 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: Mar 20, 2002, 1:31 AM CST (07:31 UTC)
Expired: Mar 20, 2002, 7:30 AM CST
In force: 6 hr
Issued by: NWS Nashville, TN
Area: Whole counties

Counties Benton County, TN, Houston County, TN, Humphreys County, TN, Montgomery County, TN, Stewart County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 7.5 hours before the alert went out and 105 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 54 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 664 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 183 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 KOHX 200731
FFWBNA
TNC005-083-085-125-161-201330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
126 AM CST WED MAR 20 2002

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES IN MIDDLE           
  TENNESSEE...
  BENTON...HOUSTON...HUMPHREYS...MONTGOMERY...AND STEWART.

* UNTIL 730 AM CST

* AT 126 AM CST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY 
  RAINFALL MOVING INTO THE DOVER AND BIG SANDY AREAS. LOCATIONS IN   
  NORTHWEST MIDDLE TENNESSEE CAN EXPECT HEAVY RAINFALL DURING THE    
  NEXT FEW HOURS, WHICH WILL ONLY EXACERBATE THE ALREADY HIGH WATER  
  LEVELS.

A FLOOD WARNING MEANS THAT 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.
$$
ROSE

1 follow-up statement

000 
WGUS74 KOHX 201051
FFSBNA
TNC005-021-043-083-085-125-147-161-201330-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
451 AM CST WED MAR 20 2002

...A FLASH FLOOD WARNING IS IN EFFECT UNTIL 730 AM FOR STEWART,
HOUSTON, BENTON, MONTGOMERY, AND HUMPHREYS COUNTIES...
...A FLASH FLOOD WARNING IS IN EFFECT UNTIL 830 AM FOR ROBERTSON,
CHEATHAM, AND DICKSON COUNTIES...

AT 444 AM, THE HEAVIEST RAINFALL HAD MOVED OUT OF NORTHWEST MIDDLE
TENNESSEE. THE SHERIFFS OFFICE IN STEWART COUNTY EARLIER REPORTED
SOME ROAD FLOODING DUE TO THIS MORNINGS RAIN. NO OTHER FLOODING
HAD BEEN REPORTED.

STILL, MOST LOCATIONS WITHIN THE WARNED AREAS RECEIVED BETWEEN ONE
HALF AND ONE INCH OF ADDITIONAL RAINFALL DURING THE EARLY MORNING.
IN ADDITION TO PONDING OF WATER ON ROADWAYS, THE RUNOFF FROM THIS
MOST RECENT RAINFALL COULD BE ENOUGH TO SEND HIGH RUNNING CREEKS
AND STREAMS OUT OF THEIR BANKS. LOW WATER CROSSINGS REMAIN ESPECIALLY
VULNERABLE.
$$
ROSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 20, 2:34 AM CST	Flash Flood Warning	OHX	Cheatham, Dickson, Robertson	5 hr

Nearby

Flash Flood Warnings in Tennessee, 2002 Every flash flood warning in 2002

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.