Alert archive / Texas / Flash Flood Warnings in 1987

Flash Flood Warning 79, NWS Austin/San Antonio, TX

June 12, 19874 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 12, 1987, 10:17 PM CDT for 4 counties in Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 12, 1987, 10:17 PM CDT (03:17 UTC)
Expired
Jun 13, 1987, 1:15 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Burnet County, TX, Hays County, TX, Travis County, TX, Williamson 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

Stephenville/Cla, TX (KSEP), launched 00:00Z, 3.3 hours before the alert went out and 197 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, Stephenville/Cla, TX at 00:00Z on 1987-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 822 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, Stephenville/Cla, TX at 00:00Z on 1987-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 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
822 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
632 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
-7 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAUS 130317
FFWAUS
TXC031-053-171-209-453-491-130615-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN TX
1017 PM CDT FRI JUN 12 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 115 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

TEXAS...BLANCO...SOUTHERN BURNET...GILLESPIE...NORTHERN HAYS...
 WESTERN TRAVIS AND WILLIAMSON

AT 1015 PM CDT INTENSE THUNDERSTORMS WERE CREATING MAJOR
FLOODING OVER THE PREVIOUS MENTIONED COUNTIES.  ROADS IN AND
AROUND MARBLE FALLS...GRANITE SHOALS AND LIBERTY HILL HAVE
BECOME IMPASSABLE.  FLOOD WATERS WERE REPORTED AS NEAR 5 FEET
DEEP IN PARTS OF MARBLE FALLS.
]
THIS IS A DANGEROUS SITUATION.  TAKE APPROPRIATE ACTION.

REMEMBER THAT DEATHS DURING FLASH FLOODING ARE OFTEN RELATED TO
MOTORISTS DRIVING THROUGH FLOODED LOW WATER CROSSINGS.

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 12, 9:15 PM CDT, 1 hour 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
910 PM CDT FRI 12 JUN 1987

...A LINE OF INTENSE THUNDERSTORMS IS MOVING SOUTHEASTWARD AT 15 MPH
THROUGH THE RAIN-SOAKED AND FLOODED HILL COUNTRY...

JUST AFTER 9 PM...RADAR SHOWED A 25 MILE WIDE LINE...EXTENDING FROM
TEMPLE AND KILLEEN THROUGH BERTRAM...MARBLE FALLS AND FREDERICKSBURG
TO NEAR HARPER.  MANY SPOTS ALONG THAT LINE INDICATED RAINFALL RATES
OF ONE TO TWO INCHES PER HOUR.

ALMOST ALL HILL COUNTRY STREAMS...CREEKS AND RIVERS REMAIN AT OR NEAR
FLOOD STAGE.  IT WILL ONLY TAKE AN HOUR OR SO OF HEAVY RAIN TO QUICKLY
CAUSE ADDITIONAL FLASH FLOODING IN THOSE SPOTS.  PERSONS IN CENTRAL
TEXAS...ESPECIALLY THE HILL COUNTRY FLOOD PRONE AREAS SHOULD TAKE
PRECAUTIONS NOW FOR LOCALIZED FLASH FLOODING.

OTHER STATEMENTS WILL BE ISSUED LATER ON THIS LINE OF INTENSE THUNDER
STORMS.
Special weather statement, Jun 12, 9:29 PM CDT, 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
929 PM CDT FRI JUN 12 1987

AT 925 PM CDT RADAR INDICATED A LINE OF THUNDERSTORMS FROM JUST SOUTH
OF OZONA AND EXTENDED THROUGH THE NORTHEAST PART OF VAL VERDE COUNTY.
THE STRONGEST THUNDERSTORM WAS LOCATED ALONG HIGHWAY 163 JUST NORTH
OF THE VAL VERDE COUNTY LINE. THE STORMS WERE MOVING EAST AT 10 MILES
AN HOUR.

THE THUNDERSTORMS ARE SLOW MOVING AND WILL LIKELY CAUSE HEAVY
RAIN. MOTORISTS TRAVELING ALONG HIGHWAY 277 AND 163 IN NORTHERN
VAL VERDE COUNTY SHOULD BE ALERT FOR REDUCED VISIBILITY...FLOODING OF
LOW LYING AREAS AND LOW WATER CROSSINGS.

SMALL HAIL...HEAVY RAIN...STRONG GUSTY WINDS AND FREQUENT DANGEROUS
LIGHTNING ARE L)IKELY WITH THESE STORMS.
Special weather statement, Jun 12, 9:59 PM CDT, 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
955 PM CDT FRI 12 JUN 1987

A LINE OF SCATTERED THUNDERSTORMS HAS MOVED INTO THE TEXAS HILL
COUNTRY. AT 945 PM CDT THE LINE EXTENDS FROM WEST TO EAST FROM
NORTHEAST VAL VERDE COUNTY EAST THROUGH NORTHERN EDWARDS COUNTY AND
KERR COUNTY THEN NORTHEAST THROUGH THE MARBLE FALLS AREA. THE THUNDER
STORMS WERE MOVING TO THE SOUTHEAST AT AROUND 10 MPH AND APPEARED TO
BE LOSING INTENSITY.

FREQUENT LIGHTNING AND BRIEF HEAVY RAIN CAN BE EXPECTED FROM THESE
THUNDERSTORMS. DUE TO THE SATURATED GROUND IN THE HILL COUNTRY FROM
RAINS OF THE PAST SEVERAL DAYS...SOME LOW WATER CROSSINGS AND LOW LYING
AREAS COULD BECOME FLOODED AGAIN AS THESE STORMOS PASS.

MOTORISTS DRIVING THROUGH THE TEXAS HILL COUNTRY TONIGHT SHOULD EXERCISE
CAUTION. OTHER STATEMENTS OR WARNINGS WILL BE ISSUED AS NEEDED.
Special weather statement, Jun 12, 10:03 PM CDT, 14 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
1000 PM CDT FRI 12 JUN 1987

...A LINE OF INTENSE THUNDERSTORMS IS MOVING SOUTHEASTWARD AT 15 MPH
THROUGH THE RAIN-SOAKED AND FLOODED HILL COUNTRY...

JUST BEFORE 10 PM...RADAR SHOWED A 25 MILE WIDE LINE...EXTENDING FROM
NEAR CAMERON TO NORTH OF GEORGETOWN THROUGH THE LIBERTY HILL AREA TO
NEAR JOHNSON CITY. MANY SPOTS ALONG THAT LINE INDICATED VERY HEAVY
RAINFALL AS THE LINE MOVES SOUTHEAST THROUGH THE AREA.

ALMOST ALL HILL COUNTRY STREAMS...CREEKS AND RIVERS REMAIN AT OR NEAR
FLOOD STAGE.  IT WILL ONLY TAKE AN HOUR OR SO OF HEAVY RAIN TO QUICKLY
CAUSE ADDITIONAL FLASH FLOODING IN THOSE SPOTS.  PERSONS IN CENTRAL
TEXAS...ESPECIARLLY THE HILL COUNTRY FLOOD PRONE AREAS SHOULD TAKE
PRECAUTIONS NOW FOR LOCALIZED FLASH FLOODING.

OTHER STATEMENTS WILL BE ISSUED LATER ON THIS LINE OF INTENSE THUNDER
STORMS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 10:17 PM CDTFlash Flood WarningEWXBlanco, Gillespie3 hr
Jun 13, 7:20 AM CDTFlash Flood WarningEWXBexar, Medina4 hr
Jun 13, 8:21 AM CDTFlash Flood WarningEWXAtascosa3 hr
Jun 13, 11:15 AM CDTFlash Flood WarningEWXMcMullen2 hr
Jun 13, 11:23 AM CDTFlash Flood WarningEWXBastrop, Caldwell3 hr
Jun 13, 12:06 PM CDTFlash Flood WarningEWXKinney, Uvalde3 hr
Jun 13, 12:16 PM CDTFlash Flood WarningEWXTravis3 hr
Jun 13, 1:46 PM CDTFlash Flood WarningEWXKerr, Real3 hr
Jun 13, 2:28 PM CDTFlash Flood WarningEWXBlanco, Burnet, Travis3 hr
Jun 13, 2:28 PM CDTFlash Flood WarningEWXWilliamson3 hr
Jun 13, 5:05 PM CDTFlash Flood WarningEWXVal Verde4 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.