Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 38, NWS Austin/San Antonio, TX

April 25, 1997Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 25, 1997, 8:33 AM CDT for Val Verde County, Texas. It was in force for 117 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 25, 1997, 8:33 AM CDT (13:33 UTC)
Expired: Apr 25, 1997, 10:30 AM CDT
In force: 117 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Val Verde County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 1.6 hours before the alert went out and 66 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: 1194 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 558 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 236 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 251336
FFWSAT
TXC465-251530-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
833 AM CDT FRI APR 25 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1030 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...VAL VERDE COUNTY
 
AT 830 AM NATIONAL WEATHER SERVICE RADAR ESTIMATED RAINFALL AMOUNTS OF
OVER 1 AND 1/2 INCHES IN THE LAST HOUR OVER THE DRY DEVILS AND LOWER
DEVILS DRAINAGES. A SQUALL LINE EXTENDING FROM THE CITY OF DEL RIO
NORTHWARD TO SAN ANGELO IS MOVING TO THE EAST AT 20 MPH. STORMS ALONG
THIS LINE WILL PRODUCE ADDITIONAL RAINS ACROSS THE EASTERN PORTIONS OF
VAL VERDE COUNTY FOR THE NEXT HALF HOUR.
 
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT ATTEMPT TO
CROSS BRIDGES...OR LOW SPOTS IF WATER COVERS THE ROADWAY.  NEVER TRY
TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT TO ESCAPE
RISING WATER DURING THREATENING RAINS.
 
 
 
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 10:20 AM CDT	Flash Flood Warning	EWX	Edwards	115 min
Apr 25, 11:11 AM CDT	Severe Thunderstorm Warning	EWX	Blanco	64 min
Apr 25, 11:17 AM CDT	Severe Thunderstorm Warning	EWX	Burnet	58 min
Apr 25, 11:52 AM CDT	Flash Flood Warning	EWX	Blanco, Burnet, Llano	4 hr
Apr 25, 1:10 PM CDT	Flash Flood Warning	EWX	Gillespie	6 hr
Apr 25, 1:53 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell	67 min
Apr 25, 2:30 PM CDT	Severe Thunderstorm Warning	EWX	Bexar	60 min
Apr 25, 2:41 PM CDT	Flash Flood Warning	EWX	Bastrop, Caldwell	4 hr
Apr 25, 2:47 PM CDT	Flash Flood Warning	EWX	Travis, Williamson	4 hr
Apr 25, 3:24 PM CDT	Flash Flood Warning	EWX	Fayette	4 hr
Apr 25, 3:59 PM CDT	Flash Flood Warning	EWX	Gonzales	3 hr
Apr 25, 5:16 PM CDT	Flash Flood Warning	EWX	Lavaca	3 hr

Nearby

Flash Flood Warnings in Texas, 1997 Every flash flood warning in 1997

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.