Alert archive / Texas / Flash Flood Warnings in 1987

Flash Flood Warning 93, NWS Austin/San Antonio, TX

July 17, 1987Blanco County, Gillespie County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 17, 1987, 6:19 AM CDT for Blanco County, Gillespie County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jul 17, 1987, 6:19 AM CDT (11:19 UTC)
Expired: Jul 17, 1987, 9:15 AM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

Counties Blanco County, TX, Gillespie 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, 11.3 hours before the alert went out and 221 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1172 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1217 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 77 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 171119
FFWAUS
TXC031-171-171415-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN TX
619 AM CDT FRI JUL 17 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 915 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

TEXAS...BLANCO AND GILLESPIE

AUSTIN RADAR HAS BEEN INDICATING HEAVY RAINFALL OVER PORTIONS
OF GILLISPIE AND BLANCO COUNTIES THROUGH THE NIGHT. PERSONS
ALONG THE PEDERNALES RIVER SHOULD MOVE AWAY FROM THE BANKS
AS A SHARP RISE CAN BE EXPECTED ALONG THE RIVER.

RAINFALL TOTALS OF UP TO FIVE INCHES MAY HAVE FALLEN THROUGH
THE NIGHT.

DONT LET CHILDREN PLAY IN WATERWAYS SUBJECT TO RAPID RISING
OR SWIFT MOVING WATER.

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, Jul 17, 3:48 AM CDT, 2 hours 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
340 AM CDT FRI JUL 17 1987

...THUNDERSTORMS WITH HEAVY RAINS WEST THROUGH NORTHWEST OF AUSTIN...

STRONG THUNDERSTORMS WITH HEAVY RAINS ARE INDICATED IN A BAND 15 MILES
WIDE FROM BLANCO TO LAKE BUCHANAN TO ADAMSVILLE...MOVEMENT WAS TOWARDS
THE EAST AT NEAR 20 MPH.

THESE THUNDERSTORMS ARE INDICATING A HEAVY RAINFALL RATE OF UP TO THREE
INCHES PER HOUR. THE RATE AT WHICH RAIN IS FALLING MAY PRODUCE TEMPORARY
FLOODING OF LOW WATER CROSSINGS AND URBAN STREETS IN SOME LOCATIONS.
MOTORISTS SHOULD BE ALERT TO THIS POSSIBILITIES.

PERSONS ALONG THE PEDERNALES RIVER SHOULD STAY ALERT TO A POSSIBLE
SHARP RISE ALONG THE RIVER DUE TO THE HEAVY RAINFALL.

A LARGE AREA OF SHOWERS AND THUNDERSTORMS WAS INDICATED WEST OF A LINE
FROM WEST OT WACO TO LAKE TRAVIS TO NORTHWEST OF SAN ANTONIO WITH
MOVEMENT TOWARDS THE NORTHEAST.

ADDITIONAL STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT.

Special weather statement, Jul 17, 3:49 AM CDT, 2 hours 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
340 AM CDT FRI JUL 17 1987

...THUNDERSTORMS WITH HEAVY RAINS WEST THROUGH NORTHWEST OF AUSTIN...

STRONG THUNDERSTORMS WITH HEAVY RAINS ARE INDICATED IN A BAND 15 MILES
WIDE FROM BLANCO TO LAKE BUCHANAN TO ADAMSVILLE...MOVEMENT WAS TOWARDS
THE EAST AT NEAR 20 MPH.

THESE THUNDERSTORMS ARE INDICATING A HEAVY RAINFALL RATE OF UP TO THREE
INCHES PER HOUR. THE RATE AT WHICH RAIN IS FALLING MAY PRODUCE TEMPORARY
FLOODING OF LOW WATER CROSSINGS AND URBAN STREETS IN SOME LOCATIONS.
MOTORISTS SHOULD BE ALERT TO THIS POSSIBILITIES.

PERSONS ALONG THE PEDERNALES RIVER SHOULD STAY ALERT TO A POSSIBLE
SHARP RISE ALONG THE RIVER DUE TO THE HEAVY RAINFALL.

A LARGE AREA OF SHOWERS AND THUNDERSTORMS WAS INDICATED WEST OF A LINE
FROM WEST OF WACO TO LAKE TRAVIS TO NORTHWEST OF SAN ANTONIO WITH
MOVEMENT TOWARDS THE NORTHEAST.

ADDITIONAL STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT.

Local storm report, Jul 17, 4:51 AM CDT, 1 hour 28 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
450 AM CDT FRI JUN 17 1987

TIME         EVENT
110 AM       2.7 INCHES OR RAIN, APPROX 50 MPH WIND GUST AT I-10
             STATE HWY 41...KERR COUNTY
203 AM       GOLF BALL SIZE HAIL, APPROX 30 TO 40 MPH WIND GUST,
             2 INCHES OF RAIN IN 40 MINUTES...NORTHERN KINNEY COUNTY
240 AM       SOUTH FORK OF GUADALUPE RIVER:
             4 TO 6 INCHES OR RAIN, 15 FT RISE AT CAMP MYSTIC, 8 FT
             RISE AT CAMP ARROWHEAD.
             NORTH FORK OF GUADALUPE RIVER:
             4 FT RISE AT MOORE RANCH.
             WATER 3 FT OVER INGRAM DAM...OLD TIMERS SAY CONDITIONS
             SAME AS 1978...ALL REPORTS VIA KERRVILLhE DSP...KERR COUNTY

Special weather statement, Jul 17, 5:06 AM CDT, 1 hour 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
5 AM CDT FRI JUL 17 1987

...THUNDERSTORMS WITH HEAVY RAINS WEST OF AUSTIN...

STRONG THUNDERSTORMS WITH HEAVY RAINS ARE INDICATED IN A BAND 15 MILES
WIDE FROM LIBERTLY HILL TO LAKE TRAVIS TO JOHNSON CITY TO BLANCO...
MOVEMENT IS TOWARDS THE NORTHEAST.

HEAVY RAINFALL RATES OF UP TO THREE INCHES PER HOUR WERE NOTED IN THE
THUNDERSTORMS. THESE HEAVY RAINFALL RATES MAY PRODUCE FLOODING OF LOW
LOW WATER CROSSINGS AND URBAN STREETS. MOTORISTS ARE ADVISED NOT TO
CROSS ROADWAYS THAT ARE WATER COVERED.

PERSONS ALONG THE PEDERNALES RIVER SHOULD STAY ALERT TO A POSSIBLE
SHARP RISE ALONG THE RIVER DUE TO THE HEAVY RAINFALL.

A LARGE AREA OF SHOWERS AND THUNDERSTORMS WAS INDICATED WEST OF A LINE
FROM WEST OF WACO TO AUSTIN TO NEAR BANDERA...MOVING NORTHEASTWARD.

FLASH FLOOD WARNING MAYBE NEEDED IN AFEW COUNTIES IF THIS AREA OF
HEAVY RAIN SLOWS ITS FORWARD MOVEMENT. PERSONS IN TH~E HEAVY RAIN
AREAS SHOULD KEPT TO THIS CHANGING WEATHER SITUATION AND BE PREPARED
TO TAKE ACTION.

ADDITIONAL STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT.

Special weather statement, Jul 17, 5:09 AM CDT, 1 hour 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
5 AM CDT FRI JUL 17 1987

...THUNDERSTORMS WITH HEAVY RAINS WEST OF AUSTIN...

STRONG THUNDERSTORMS WITH HEAVY RAINS ARE INDICATED IN A BAND 15 MILES
WIDE FROM LIBERTLY HILL TO LAKE TRAVIS TO JOHNSON CITY TO BLANCO...
MOVEMENT IS TOWARDS THE NORTHEAST.

HEAVY RAINFALL RATES OF UP TO THREE INCHES PER HOUR WERE NOTED IN THE
THUNDERSTORMS. THESE HEAVY RAINFALL RATES MAY PRODUCE FLOODING OF LOW
LOW WATER CROSSINGS AND URBAN STREETS. MOTORISTS ARE ADVISED NOT TO
CROSS ROADWAYS THAT ARE WATER COVERED.

PERSONS ALONG THE PEDERNALES RIVER SHOULD STAY ALERT TO A POSSIBLE
SHARP RISE ALONG THE RIVER DUE TO THE HEAVY RAINFALL.

A LARGE AREA OF SHOWERS AND THUNDERSTORMS WAS INDICATED WEST OF A LINE
FROM WEST OF WACO TO AUSTIN TO NEAR BANDERA...MOVING NORTHEASTWARD.

FLASH FLOOD WARNING MAYBE NEEDED IN AFEW COUNTIES IF THIS AREA OF
HEAVY RAIN SLOWS ITS FORWARD MOVEMENT. PERSONS IN THE HEAVY RAIN
AREAS SHOULD BE PREPARED  TO TAKE ACTION IF A WARNING IS ISSUED.

ADDITIONAL STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT.

Local storm report, Jul 17, 5:54 AM CDT, 25 minutes before

STORM REPORT...CORRECTION
NATIONAL WEATHER SERVICE SAN ANTONIO TX
555 AM CDT FRI JUN 17 1987

TIME         EVENT
240 AM       NORTH FORK OF GUADALUPE RIVER:
             4 FT RISE AT  M O  RANCH.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 1:01 AM CDT	Flash Flood Warning	EWX	Kerr, Real	4 hr
Jul 17, 1:58 AM CDT	Severe Thunderstorm Warning	EWX	Kinney	62 min
Jul 17, 4:21 AM CDT	Severe Thunderstorm Warning	EWX	Real, Uvalde	54 min
Jul 17, 4:55 AM CDT	Flash Flood Warning	EWX	Kerr	4 hr

Nearby

Flash Flood Warnings in Texas, 1987 Every 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.