Alert archive / Tennessee / Flash Flood Warnings in 2002

Flash Flood Warning 24, NWS Nashville, TN

March 20, 2002Cheatham County, Dickson County, Robertson County, Tennessee

NWS Nashville, TN issued this flash flood warning at Mar 20, 2002, 2:34 AM CST for Cheatham County, Dickson County, Robertson County, Tennessee. It was in force for 5 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, 2:34 AM CST (08:34 UTC)
Expired: Mar 20, 2002, 7:30 AM CST
In force: 5 hr
Issued by: NWS Nashville, TN
Area: Whole counties

Counties Cheatham County, TN, Dickson County, TN, Robertson County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 8.6 hours before the alert went out and 50 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 200834
FFWBNA
TNC021-043-147-201430-

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

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHEATHAM...DICKSON...AND ROBERTSON COUNTIES

* UNTIL 830 AM CST

* AT 225 AM CST...WEATHER SERVICE DOPPLER RADAR SHOWED A SOLID AREA 
OF HEAVY RAINFALL WITH EMBEDDED THUNDERSTORMS MOVING ACROSS WESTERN 
MIDDLE TENNESSEE. THE HEAVIEST RAINFALL WAS ABOUT TO MOVE INTO THE 
WARNED AREAS. FLOODING OF ROADWAYS HAS ALREADY BEEN REPORTED IN 
STEWART COUNTY WITH THIS SYSTEM. 

SOME FLOODING OF ROADWAYS AND CREEKS IS IMMINENT. DO NOT ATTEMPT TO 
DRIVE ACROSS WATER COVERED ROADWAYS...ESPECIALLY AT NIGHT.
$$
MAR

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, 1:31 AM CST	Flash Flood Warning	OHX	Benton, Houston, Humphreys, Montgomery, Stewart	6 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.