Alert archive / Tennessee / Flash Flood Warnings in 2003

Flash Flood Warning 74, NWS Nashville, TN

July 28, 2003Williamson County, Tennessee

NWS Nashville, TN issued this flash flood warning at Jul 28, 2003, 4:55 PM CDT for Williamson County, Tennessee. It was in force for 2 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: Jul 28, 2003, 4:55 PM CDT (21:55 UTC)
Expired: Jul 28, 2003, 7:00 PM CDT
In force: 2 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), 60 km from the middle of the area, began a volume at 21:59 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, 9.9 hours before the alert went out and 47 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: 1388 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 903 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 22 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 282156
FFWBNA
TNC187-290000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
455 PM CDT MON JUL 28 2003

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN WILLIAMSON COUNTY IN TENNESSEE

* UNTIL 700 PM CDT

* AT 447 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN FROM SOUTH CENTRAL WILLIAMSON COUNTY TO EXTREME SOUTHWESTERN
  RUTHERFORD COUNTY...OR FROM 10 MILES SOUTHWEST OF FRANKLIN TO 16
  MILES SOUTHEAST OF FRANKLIN...MOVING EAST AT 25 MPH.

* THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL CONTINUE IN RURAL 
SOUTHERN WILLIAMSON COUNTY FOR THE NEXT HOUR. 

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 3580 8710 3569 8662 3579 8664

$$

04

1 follow-up statement

000 
WGUS74 KOHX 282333
FFSBNA
TNC187-290000-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
630 PM CDT MON JUL 28 2003

...FLASH FLOOD WARNING FOR SOUTHERN WILLIAMSON COUNTY HAS BEEN
CANCELED...

NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THAT EARLIER HEAVY
RAINFALL IN SOUTHERN WILLIAMSON COUNTY HAS DEPARTED THE REGION. RADAR
ESTIMATES THAT UP TO TWO INCHES OF RAINFALL OCCURRED IN A COUPLE OF
HOURS IN SOUTHEAST WILLIAMSON COUNTY...WITH NO FLOODING PROBLEMS
NOTED. THUS...THE FLASH FLOOD WARNING HAS BEEN CANCELED.

ALTHOUGH THE EARLIER THUNDERSTORMS HAVE DISSIPATED, RUNOFF FROM THE
RAINFALL MAY STILL PRODUCE RISES ALONG AREA CREEKS AND STREAMS, AND
CAN STILL POSE A DANGER. AS ALWAYS, PLEASE DO NOT ATTEMPT TO DRIVE
ACROSS WATER COVERED ROADS.

$$

04

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 1:45 PM CDT	Severe Thunderstorm Warning	OHX	Robertson	45 min
Jul 28, 2:38 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Pickett	37 min
Jul 28, 3:17 PM CDT	Severe Thunderstorm Warning	OHX	Smith	28 min
Jul 28, 3:34 PM CDT	Severe Thunderstorm Warning	OHX	Jackson	26 min
Jul 28, 4:05 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	25 min
Jul 28, 4:24 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford	51 min
Jul 28, 4:30 PM CDT	Severe Thunderstorm Warning	OHX	Warren	45 min
Jul 28, 5:17 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	43 min
Jul 28, 5:27 PM CDT	Severe Thunderstorm Warning	OHX	Bedford	33 min
Jul 28, 5:33 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Robertson, Stewart	87 min
Jul 28, 5:46 PM CDT	Severe Thunderstorm Warning	OHX	Coffee	29 min
Jul 28, 5:56 PM CDT	Flash Flood Warning	OHX	Coffee	2 hr
Jul 28, 6:05 PM CDT	Severe Thunderstorm Warning	OHX	Lincoln	40 min
Jul 28, 6:10 PM CDT	Severe Thunderstorm Warning	OHX	Franklin	50 min
Jul 28, 6:10 PM CDT	Tornado Warning	OHX	Montgomery, Robertson	35 min
Jul 28, 6:49 PM CDT	Tornado Warning	OHX	Cheatham, Montgomery, Robertson	41 min

Nearby

Flash Flood Warnings in Tennessee, 2003 Every 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.