Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 164, NWS Austin/San Antonio, TX

June 21, 1997Karnes County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 21, 1997, 3:36 PM CDT for Karnes County, Texas. It was in force for 3 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
Jun 21, 1997, 3:36 PM CDT (20:36 UTC)
Expired
Jun 21, 1997, 6:45 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Karnes County, TX

The radar

The Austin/San Antonio radar (KEWX), 90 km from the middle of the area, began a volume at 20:40 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, 8.6 hours before the alert went out and 140 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 1997-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3868 joules per kilogram.LCLEL10008507005003002001001 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 1997-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 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
3868 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
570 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
1.0
Supercell composite
5.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 212035
FFWSAT
TXC255-212345-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
336 PM CDT SAT JUN 21 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  645 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...KARNES COUNTY
 
AT 330 PM...RADAR INDICATED SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN
WERE MOVING INTO KARNES COUNTY NEAR RUNGE... KENEDY... AND ZUNKERVILLE.
 
MOVEMENT WAS NORTHEAST AT 15 MPH.  THIS RAIN WILL OVERSPREAD THE COUNTY
THIS AFTERNOON PRODUCING FLOODING.
 
MANY AREAS OF THE COUNTY HAVE RECEIVED 2 TO 4 INCHES OF RAIN.  RADAR
INDICATED THESE NEW STORMS WERE PRODUCING NEAR 1 INCH PER HOUR RAINFALL.
 
DANGEROUS FLASH FLOODING WILL OCCUR ACROSS RAIN SOAKED AREAS IF 1 TO 2
INCHES OF RAIN FALLS IN ONE HOUR OR LESS.
 
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.
 
FLOOD PRONE URBAN AREAS FILL WITH WATER QUICKLY.  CLOGGED STORM
DRAINS MAY CAUSE OTHER AREAS TO FLOOD.  DO NOT DRIVE THROUGH
FLOOD WATERS AND STAY AWAY FROM STORM DRAINS.
 
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
Jun 20, 7:51 PM CDTSevere Thunderstorm WarningEWXVal Verde69 min
Jun 20, 8:57 PM CDTSevere Thunderstorm WarningEWXVal Verde63 min
Jun 21, 1:51 AM CDTFlash Flood WarningEWXKerr3 hr
Jun 21, 6:01 AM CDTFlash Flood WarningEWXFrio3 hr
Jun 21, 7:30 AM CDTFlash Flood WarningEWXAtascosa3 hr
Jun 21, 7:45 AM CDTFlash Flood WarningEWXBexar3 hr
Jun 21, 9:01 AM CDTFlash Flood WarningEWXFrio119 min
Jun 21, 9:33 AM CDTFlash Flood WarningEWXGonzales, Guadalupe, Wilson3 hr
Jun 21, 10:25 AM CDTFlash Flood WarningEWXDeWitt, Karnes3 hr
Jun 21, 10:39 AM CDTFlash Flood WarningEWXBandera, Medina3 hr
Jun 21, 10:59 AM CDTFlash Flood WarningEWXCaldwell3 hr
Jun 21, 11:16 AM CDTFlash Flood WarningEWXBastrop, Fayette, Lavaca3 hr
Jun 21, 11:16 AM CDTFlash Flood WarningEWXBlanco, Comal, Hays, Travis3 hr
Jun 21, 11:16 AM CDTFlash Flood WarningEWXKendall3 hr
Jun 21, 11:38 AM CDTFlash Flood WarningEWXBandera, Bexar3 hr
Jun 21, 12:08 PM CDTFlash Flood WarningEWXLee, Williamson3 hr
Jun 21, 1:25 PM CDTFlash Flood WarningEWXGuadalupe3 hr
Jun 21, 1:25 PM CDTFlash Flood WarningEWXGillespie3 hr
Jun 21, 1:25 PM CDTFlash Flood WarningEWXDeWitt3 hr
Jun 21, 1:25 PM CDTFlash Flood WarningEWXBandera3 hr
Jun 21, 2:07 PM CDTFlash Flood WarningEWXKendall, Kerr3 hr
Jun 21, 2:07 PM CDTFlash Flood WarningEWXLavaca3 hr
Jun 21, 3:20 PM CDTFlash Flood WarningEWXBexar, Medina3 hr
Jun 21, 3:20 PM CDTFlash Flood WarningEWXComal3 hr
Jun 21, 4:39 PM CDTFlash Flood WarningEWXGuadalupe6 hr
Jun 21, 4:39 PM CDTFlash Flood WarningEWXBandera6 hr
Jun 21, 4:39 PM CDTFlash Flood WarningEWXDeWitt6 hr
Jun 21, 5:09 PM CDTFlash Flood WarningEWXCaldwell, Travis6 hr
Jun 21, 5:17 PM CDTFlash Flood WarningEWXBandera6 hr
Jun 21, 5:17 PM CDTFlash Flood WarningEWXLavaca6 hr
Jun 21, 5:42 PM CDTFlash Flood WarningEWXHays6 hr
Jun 21, 6:16 PM CDTFlash Flood WarningEWXBexar, Comal3 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.