Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 2, NWS Austin/San Antonio, TX

February 19, 1997Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Feb 19, 1997, 11:46 PM CST for Val Verde 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 counties it named.

The facts

Issued
Feb 19, 1997, 11:46 PM CST (05:46 UTC)
Expired
Feb 20, 1997, 3:45 AM CST
In force
4 hr
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 00:00Z, 5.8 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-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 1997-02-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 810 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 00:00Z on 1997-02-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 square meters per square second.1939587897117Sfc1 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
810 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
917 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 200548
FFWSAT
TXC465-200945-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1146 PM CST WED FEB 19 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  345 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...VAL VERDE COUNTY
 
THE FLASH FLOOD WARNING HAS BEEN EXTENDED. AT 1145 PM CST...DOPPLER
RADAR INDICATED STRONG THUNDERSTORMS PRODUCING RAINFALL RATES OF UP TO
2.5 INCHES AN HOUR ACROSS CENTRAL VAL VERDE COUNTY. THESE THUNDERSTORMS
EXTENDED SOUTHWARD INTO MEXICO FOR 100 MILES. THE INDIVIDUAL STORMS WERE
MOVING NORTH AT 35 MPH WHILE THE AREA WAS MOVING EAST AT 15 MPH.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS OBSERVED
ACT QUICKLY.  MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 19, 9:10 PM CSTFlash Flood WarningEWXVal Verde3 hr
Feb 19, 9:51 PM CSTSevere Thunderstorm WarningEWXVal Verde69 min
Feb 20, 3:07 AM CSTFlash Flood WarningEWXGillespie4 hr
Feb 20, 3:49 AM CSTFlash Flood WarningEWXVal Verde116 min
Feb 20, 7:07 AM CSTFlash Flood WarningEWXGillespie3 hr
Feb 20, 7:22 AM CSTFlash Flood WarningEWXReal3 hr
Feb 20, 8:51 AM CSTFlash Flood WarningEWXKerr4 hr
Feb 20, 9:53 AM CSTFlash Flood WarningEWXGillespie, Llano4 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.