Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 218, NWS Austin/San Antonio, TX

June 28, 1997Llano County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 28, 1997, 5:56 AM CDT for Llano 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
Jun 28, 1997, 5:56 AM CDT (10:56 UTC)
Expired
Jun 28, 1997, 8:00 AM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Llano County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 10.9 hours before the alert went out and 255 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 1997-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1755 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, Del Rio, TX at 00:00Z on 1997-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 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
1755 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1266 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 281056
FFWSAT
TXC299-281300-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
556 AM CDT SAT JUN 28 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  800 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...LLANO COUNTY
 
NATIONAL WEATHER SERVICE DOPPLER RADAR HAS INDICATED 1.9 INCHES OF RAIN
HAS FALLEN BETWEEEN LLANO AND VALLEY SPRING IN THE PAST THREE HOURS.
CURERNT ESTIMATED RAINFALL RATE OF 1.8 INCHES AN HOUR IS OCCURRING
NORTHEAST OF LLANO. THE ENTIRE AREA OF HEAVY RAINS IS MOVING SLOWLY EAST 
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.
 
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.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 28, 5:38 AM CDT, 18 minutes before
TXZ171>173-183>194-202>209-217>225-228-282300-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
600 AM CDT SAT JUN 28 1997

SOME LOCALIZED FLOODING IS POSSIBLE THROUGH THIS EVENING DUE TO AN
UPPER LEVEL DISTURBANCE AND VERY MOIST AIR OVER THE SOUTH TEXAS.  THE
STRONGER STORMS WILL PRODUCE LOCALLY HEAVY RAINFALL AMOUNTS OF 1 TO 2
INCHES IN A SHORT PERIOD OF TIME.

THE SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED ACROSS THE HILL
COUNTRY INTO SOUTH CENTRAL TEXAS THROUGH THIS EVENING WILL PRODUCE
AVERAGE RAINFALL AMOUNTS OF 1/2 INCH WITH ISOLATED TOTALS OF
1 TO 2 INCHES.

NEARBY HAZARDOUS WEATHER OUTLOOKS INCLUDE:
FOR SOUTHWEST TEXAS...FROM MIDLAND...LBBSPSMAF
FOR THE CONCHO VALLEY...FROM SAN ANGELO...LBBSPSSJT
FOR NORTH TEXAS...FROM FORT WORTH...FTWSPSFTW
FOR SOUTHEAST TEXAS...FROM HOUSTON/GALVESTON...SATSPSHOU
FOR COASTAL BEND/RIO GRANDE PLAINS...FROM CORPUS CHRISTI...SATSPSCRP

THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF
THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS...AND
ADVISORIES.  THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED
ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED
HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 8:04 AM CDTFlash Flood WarningEWXLlano116 min

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.