Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 39, NWS Austin/San Antonio, TX

April 25, 1997Edwards County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 25, 1997, 10:20 AM CDT for Edwards County, Texas. It was in force for 115 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, 10:20 AM CDT (15:20 UTC)
Expired
Apr 25, 1997, 12:15 PM CDT
In force
115 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Edwards County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 3.3 hours before the alert went out and 86 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-pSkew-T log-p diagram, Del Rio, TX at 12:00Z on 1997-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1194 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 1997-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 236 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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 251522
FFWSAT
TXC137-251715-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1020 AM CDT FRI APR 25 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1215 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...EDWARDS COUNTY
 
AT 1020 AM NATIONAL WEATHER SERVICE RADAR ESTIMATED ONE AND ONE HALF TO
2 INCHES OF RAINFALL IN THE LAST THREE HOURS. HEAVY RAIN CONTINUES TO
FALL AS A SQUALL LINE MOVING TO THE EAST AT 15 TO 20 MPH MOVES OVER THE
COUNTY. STREAMS...CREEKS...AND LOW WATER CROSSINGS ARE LIKELY FILLING
WITH WATER AND RUNOFF WILL CONTINUE FOR ANOTHER HOUR OR TWO.*
 
AVOID ALREADY FLOODED AREAS.  TRAVELERS SHOULD NOT ATTEMPT TO
CROSS FLOODED ROADS.  IF YOUR VEHICLE STALLS...LEAVE IT AND MOVE
IMMEDIATELY TO HIGHER GROUND IF YOU CAN DO SO SAFELY.
 
 
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 25, 8:33 AM CDTFlash Flood WarningEWXVal Verde117 min
Apr 25, 11:11 AM CDTSevere Thunderstorm WarningEWXBlanco64 min
Apr 25, 11:17 AM CDTSevere Thunderstorm WarningEWXBurnet58 min
Apr 25, 11:52 AM CDTFlash Flood WarningEWXBlanco, Burnet, Llano4 hr
Apr 25, 1:10 PM CDTFlash Flood WarningEWXGillespie6 hr
Apr 25, 1:53 PM CDTSevere Thunderstorm WarningEWXCaldwell67 min
Apr 25, 2:30 PM CDTSevere Thunderstorm WarningEWXBexar60 min
Apr 25, 2:41 PM CDTFlash Flood WarningEWXBastrop, Caldwell4 hr
Apr 25, 2:47 PM CDTFlash Flood WarningEWXTravis, Williamson4 hr
Apr 25, 3:24 PM CDTFlash Flood WarningEWXFayette4 hr
Apr 25, 3:59 PM CDTFlash Flood WarningEWXGonzales3 hr
Apr 25, 5:16 PM CDTFlash Flood WarningEWXLavaca3 hr

Nearby

Flash Flood Warnings in Texas, 1997Every 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.