Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 24, NWS Austin/San Antonio, TX

June 30, 2002Lavaca County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 30, 2002, 7:21 AM CDT for Lavaca County, Texas. It was in force for 4 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: Jun 30, 2002, 7:21 AM CDT (12:21 UTC)
Expired: Jun 30, 2002, 11:00 AM CDT
In force: 4 hr
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Lavaca County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 0.4 hours before the alert went out and 192 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: 2322 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 564 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 92 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.

769 
WGUS54 KEWX 301221
FFWSAT
TXC285-301600-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
723 AM CDT SUN JUN 30 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  LAVACA

* UNTIL 1100 AM CDT

* AT 720 AM...WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN   
JUST SOUTH OF HALLETTSVILLE ALONG THE LAVACA RIVER.  MOVEMENT WAS TO 
THE NORTH AT 30 MPH WITH ADDITIONAL HEAVY RAIN AND SHOWERS TRAINING 
NORTHWARD INTO THE SAME AREA.

EXCESSIVE RUNOFF FROM THESE SHOWERS AND HEAVY RAINS WILL CAUSE FLASH 
FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. 
ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS 
AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. 
MOVE TO HIGHER GROUND.

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


LAT...LON 2949 9675 2913 9690 2942 9718 2959 9710






$$

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 30, 4:08 AM CDT	Flash Flood Warning	EWX	Guadalupe	3 hr
Jun 30, 6:18 AM CDT	Flash Flood Warning	EWX	Bandera	3 hr
Jun 30, 6:46 AM CDT	Flash Flood Warning	EWX	Blanco, Comal, Hays	4 hr
Jun 30, 7:02 AM CDT	Flash Flood Warning	EWX	Guadalupe	4 hr
Jun 30, 7:46 AM CDT	Flash Flood Warning	EWX	Bastrop, Travis, Williamson	4 hr
Jun 30, 8:08 AM CDT	Flash Flood Warning	EWX	Kendall	4 hr
Jun 30, 8:46 AM CDT	Flash Flood Warning	EWX	Bexar	3 hr
Jun 30, 9:29 AM CDT	Flash Flood Warning	EWX	Burnet	4 hr
Jun 30, 9:49 AM CDT	Flash Flood Warning	EWX	Gillespie	3 hr
Jun 30, 10:24 AM CDT	Flash Flood Warning	EWX	Kerr	3 hr
Jun 30, 10:43 AM CDT	Flash Flood Warning	EWX	Blanco	2 hr
Jun 30, 11:24 AM CDT	Flash Flood Warning	EWX	Kendall	3 hr
Jun 30, 12:52 PM CDT	Flash Flood Warning	EWX	Bandera, Blanco, Burnet, Gillespie, Kendall, Kerr and 1 more	3 hr
Jun 30, 1:43 PM CDT	Flash Flood Warning	EWX	Atascosa, Bexar, Comal, Guadalupe, Hays, Wilson	3 hr
Jun 30, 3:42 PM CDT	Flash Flood Warning	EWX	Blanco, Burnet, Kendall	2 hr
Jun 30, 4:54 PM CDT	Flash Flood Warning	EWX	Blanco, Comal, Gillespie, Hays, Kendall, Kerr	3 hr

Nearby

Flash Flood Warnings in Texas, 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.