Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 65, NWS Austin/San Antonio, TX

May 24, 1997Lavaca County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 24, 1997, 3:11 PM CDT for Lavaca County, Texas. 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 counties it named.

The facts

Issued
May 24, 1997, 3:11 PM CDT (20:11 UTC)
Expired
May 24, 1997, 5:15 PM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Lavaca County, TX

The radar

The Austin/San Antonio radar (KEWX), 112 km from the middle of the area, began a volume at 20:15 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

Corpus Christi, TX (KCRP), launched 12:00Z, 8.2 hours before the alert went out and 188 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, Corpus Christi, TX at 12:00Z on 1997-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2214 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, Corpus Christi, TX at 12:00Z on 1997-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 square meters per square second.193958Sfc1 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
2214 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
625 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
109 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 
TTAA00 KSAT 242015
FFWSAT
TXC285-242215-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
311 PM CDT SAT MAY 24 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  515 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...LAVACA COUNTY
 
AT 305 PM...RADAR INDICATED NUMEROUS THUNDERSTORMS WITH VERY HEAVY
RAIN REDEVELOPING BETWEEN SUBLIME... HALLETTSVILLE AND SHINER.
RADAR ESTIMATED RAINFALL 1 TO 2 INCHES PER HOUR.  AN ADDITIONAL
1 TO 3 INCHES IS POSSIBLE BY 5 PM.
 
AREAS AT GREATEST RISK OF FLOODING WERE THOSE ALONG AND NEAR
U.S. HIGHWAY 90A BETWEEN SUBLIME AND HALLETTSVILLE AND U.S.
HIGHWAY 77A BETWEEN HALLETTSVILLE AND YOAKUM.
 
THE THUNDERSTORMS WERE MOVING NORTHEAST AT 15 MPH.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.  IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS.  CAMPERS AND OTHER
PEOPLE IN RECREATION AREAS ALONG CREEKS...STREAMS...AND RIVERS IN
THE WARNING AREA SHOULD MOVE TO HIGH GROUND IMMEDIATELY.

The office that day

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

IssuedProductOfficeCountiesLasted
May 24, 3:58 PM CDTFlash Flood WarningEWXDeWitt2 hr
May 24, 4:21 PM CDTSevere Thunderstorm WarningEWXDeWitt69 min
May 24, 5:11 PM CDTFlash Flood WarningEWXLavaca2 hr
May 24, 6:53 PM CDTFlash Flood WarningEWXLavaca2 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; radar from the NEXRAD Level II archive.