Alert archive / Texas / Flash Flood Warnings in 1987

Flash Flood Warning 90, NWS Austin/San Antonio, TX

June 25, 1987Travis County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 25, 1987, 4:55 PM CDT for Travis County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 25, 1987, 4:55 PM CDT (21:55 UTC)
Expired
Jun 25, 1987, 8:00 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Travis County, TX

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Victoria Regiona, TX (KVCT), launched 12:00Z, 9.9 hours before the alert went out and 186 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, Victoria Regiona, TX at 12:00Z on 1987-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1930 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, Victoria Regiona, TX at 12:00Z on 1987-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
1930 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
810 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
58 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 KAUS 252155
FFWAUS
TXC453-260100-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN TX
455 PM CDT THU JUN 25 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL  800 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH CENTRAL TEXAS
          ...TRAVIS
 
FLASH FLOODING IS OCCURING IN TRAVIS COUNTY AT THE 6600 BLOCK
OF SHOAL CREEK WHERE SHOAL CREEK IS OUT OF ITS BANKS.  IN ELROY
...IN SOUTHEAST TRAVIS COUNTY...THREE INCHES OF RAIN WAS
RECORDED IN THE LAST HOUR.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...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 MOVE UP TO HIGHER GROUND.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.  IT'S
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS.  CAMPERS SHOULD
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.
 
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A
SMALL ONE...ON FOOT.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

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 25, 3:40 PM CDT, 1 hour 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
340 PM CDT THU JUN 25 1987

...STRONG THUNDERSTORMS RAPIDLY DEVELOPING IN CENTRAL TEXAS...

WITHIN THE PAST HOUR STRONG THUNDERSTORMS HAVE DEVELOPED IN AND
AROUND THE AUSTIN AREA. ANYONE OF THESE THUNDERSTORMS MAY PRODUCE
SMALL HAIL...GUSTY WINDS AND BRIEF HEAVY RAINS ALONG WITH DANGEROUS
LIGHTNING AS THEY MOVE SOUTHEASTWARD.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 25, 3:48 PM CDTSevere Thunderstorm WarningEWXTravis57 min
Jun 25, 4:00 PM CDTSevere Thunderstorm WarningEWXBastrop60 min
Jun 25, 4:42 PM CDTSevere Thunderstorm WarningEWXBastrop, Lee, Milam, Travis, Williamson63 min
Jun 25, 4:42 PM CDTSevere Thunderstorm WarningEWXBurleson63 min
Jun 25, 5:42 PM CDTSevere Thunderstorm WarningEWXTravis, Williamson63 min
Jun 25, 6:00 PM CDTSevere Thunderstorm WarningEWXJackson, Lavaca60 min
Jun 25, 6:36 PM CDTTornado WarningEWXTravis39 min

Nearby

Flash Flood Warnings in Texas, 1987Every flash flood warning in 1987

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.