Alert archive / Texas / Flash Flood Warnings in 1987

Flash Flood Warning 20, NWS Austin/San Antonio, TX

May 31, 1987Kinney County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 31, 1987, 9:15 AM CDT for Kinney County, Texas. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
May 31, 1987, 9:15 AM CDT (14:15 UTC)
Expired
May 31, 1987, 11:15 AM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Kinney 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

Del Rio, TX (KDRT), launched 12:00Z, 2.3 hours before the alert went out and 41 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 12:00Z on 1987-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1083 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 12:00Z on 1987-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 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
1083 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
605 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 311415
FFWSAT
TXC271-311615-
 
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
915 AM CDT SUN MAY 31 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 AM CDT AND A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1115 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...KINNEY
 
A SEVERE THUNDERSTORM IS LOCATED ABOUT 10 MILES SOUTHWEST OF
BRACKETTVILLE TEXAS OR JUST WEST OF LAS MORAS.  THIS SEVERE
THUNDERSTORM IS DRIFTING NORTHEAST AND BECAUSE OF THE SLOW
MOVEMENT...THE HEAVY RAINS ARE CAUSING FLASH FLOOD CONDITIONS.  IF
THIS SEVERE THUNDERSTORM CONTINUES TO DRIFT NORTHEAST...IT COULD MOVE
INTO BRACKETVILLE IN ABOUT ONE HOUR.  RESIDENTS IN BRACKETTVILLE AND
TO THE SOUTHWEST OF BRACKETTVILLE SHOULD BE ALERT FOR THIS SEVERE
THUNDERSTORM AND FLASH FLOODING.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...HAIL
3/4 INCH OR MORE IN DIAMETER...FREQUENT LIGHTNING AND VERY HEAVY
RAIN.
 
WHEN A THUNDERSTORM THREATENS...SEEK SHELTER INSIDE A HOME OR
BUILDING AWAY FROM DOORS AND WINDOWS.  REFRAIN FROM USING ELECTRICAL
APPLIANCES.
 
PLEASE LISTEN TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO STATION
FOR LATER STATEMENTS OR WARNINGS REGARDING THIS SEVERE WEATHER EVENT.

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, May 31, 6:37 AM CDT, 2 hours 38 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
630 AM CDT SUN MAY 31 1987

...THE FLASH FLOOD WATCH CONTINUES FOR TRAVIS AND ALL SURROUNDING
COUNTIES IN CENTRAL TEXAS...

   THUNDERSTORMS AND HEAVY RAINS WERE ONCE AGAIN MOVING INTO THE
WESTERN HILL COUNTRY...NORTHWEST AND WEST OF SAN ANTONIO.  THEY WERE
MOVING TOWARDS THE NORTHEAST AT 10 TO 15 MPH.  THE CLOSEST THUNDER-
STORM TO AUSTIN AT THIS TIME IS SOME 100 MILES TO THE SOUTHWEST.

CONDITIONS REMAIN VERY UNSTABLE AND REFORMATION AND DEVELOPMENT OF
ADDITIONAL SHOWERS AND THUNDERSTORMS LATER TODAY WILL ONCE AGAIN
INCREASE THE FLASH FLOOD THREAT.

NUMEROUS RELEASES HAVE COME OUT OF BOTH THE AUSTIN AND SAN ANTONIO
OFFICES CO*NCERNING OUR MINI-MONSOON SEASON.  BROADCASTERS PAY
PARTICULAR ATTENTION TO THE SAFETY RULES AND REPEAT THESE OFTEN,
ESPECIALLY WHEN HEAVY RAINS BEGIN OR MOVE IN.
Special weather statement, May 31, 7:01 AM CDT, 2 hours 14 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
705 AM CDT SUN MAY 31 1987

...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR TONIGHT AND SUNDAY FOR
VAL VERDE COUNTY TX...

AT 700 AM CDT RADAR INDICATED HEAVY THUNDERSTORMS MOVING THROUGH THE
CITY OF DEL RIO. HAIL HAS BEEN REPORTED WITH THESE STORMS. THE
THUNDERSTORMS ARE MOVING TO THE NORTH AT ABOUT 15 MPH.

EVERYONE SHOULD KEEP A WATCHFUL EYE ON THE WEATHER.  AVOID DRIVING
YOUR CAR DURINJG PERIODS OF HEAVY RAINS. WASH OUTS AND FLOODED
ROADWAYS CAN PLUNGE YOU INTO LIFE THREATENING SITUATIONS.

YOUR NATIONAL WEATHER SERVICE WILL ISSUE ADDITIONALS STATEMENTS...SO
STAY TUNED TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO.

The office that day

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

IssuedProductOfficeCountiesLasted
May 31, 9:15 AM CDTSevere Thunderstorm WarningEWXKinney60 min
May 31, 11:32 AM CDTFlash Flood WarningEWXKinney3 hr
May 31, 12:05 PM CDTFlash Flood WarningEWXVal Verde4 hr
May 31, 4:40 PM CDTFlash Flood WarningEWXHays3 hr

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.