Alert archive / Texas / Flash Flood Warnings in 1987
Flash Flood Warning 91, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 17, 1987, 1:01 AM CDT for Kerr County, Real County, Texas. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jul 17, 1987, 1:01 AM CDT (06:01 UTC)
- Expired
- Jul 17, 1987, 5:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Kerr County, TX, Real 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 00:00Z, 6.0 hours before the alert went out and 137 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.
- Mixed-layer CAPE
- 2501 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1032 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 8.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSAT 170601
FFWSAT
TXC265-385-171000-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
101 AM CDT FRI JUL 17 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 5 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTH TEXAS
...KERR...REAL
AT 1 AM CDT...HONDO WEATHER RADAR INDICATED A LINE OF THUNDERSTORMS
FROM NORTHERN REAL COUNTY NORTHEASTWARD INTO KERR COUNTY. THIS LINE
OF THUNDERSTORMS HAS SHOWN LITTLE MOVEMENT DURING THE PAST HOUR OR
TWO. RAINFALL RATES NEAR 4 INCHES PER HOUR HAVE BEEN INDICATED BY
RADAR AND SATELLITE INTERPRETATION IN SOME OF THESE STORMS. THE
STORMS PRODUCING HEAVIEST RAINFALL ARE LOCATED IN NORTHERN REAL
COUNTY...ABOUT 10 MILES NORTH OF LEAKEY ON THE HEADWATERS OF THE FRIO
RIVER...AND IN KERR COUNTY...WEST OF HUNT AND INGRAM...ON THE
HEADWATERS OF THE GUADALUPE RIVER.
PERSONS CLOSE TO THE FRIO RIVER FROM LEAKEY DOWNSTREAM TO GARNER
STATE PARK...AS WELL AS PERSONS CLOSE TO THE GUADALUPE RIVER FROM
CAMP STEWART DOWNSTREAM PAST HUNT AND INGRAM TO KERRVILLE...SHOULD BE
ALERT FOR POSSIBLE HEAVY RAIN AND FLASH FLOODING THE REST OF THIS
FRIDAY MORNING. CAMPERS SHOULD MOVE TO HIGH GROUND AND AWAY FROM THE
FLOOD PLAIN OF THESE RIVERS...AND THEIR TRIBUTARIES...IMMEDIATELY.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN
REPORTED.
REMEMBER...DEATHS DURING FLASH FLOODING ARE FREQUENTLY RELATED TO
MOTORISTS DRIVING INTO FLOODED LOW WATER CROSSINGS OR FROM CHILDREN
PLAYING NEAR FLOODED STREAMS OR DRAINAGE AREAS.
DANGEROUS LIGHTNING AND GUSTY WINDS OFTEN ACCOMPANY FLASH FLOOD
PRODUCING THUNDERSTORMS.
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.
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, Jul 16, 7:30 PM CDT, 5 hours 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 730 PM CDT THU JUL 16 1987 AT 720 PM CDT A BROKEN BAND OF SHOWERS AND OCCASIONALLY VERY HEAVY THUNDERSTORMS WAS INDICATED BY RADAR. THIS WEATHER ACTIVITY WAS ACROSS THE PECOS FROM JUST EAST OF FORT STOCKTON TO THE RIO GRANDE AT THE WESTERN VAL VERDE COUNTY LINE AND PASSING SOUTHEASTWARD INTO MEXICO ABOUT 40 MILES WEST OF DEL RIO. THE SHOWERS AND THUNDERSTORMS WERE MOVING BASICLY EAST AT AROUND 10 MPH. AS THE THUNDERSTORMS IN THIS BAND MOVE INTO THE COUNTY STRONG GUSTS OF WIND TO 45 MPH AND BRIEF PERIODS OF HEAVY RAIN MAY BE EXPERIENCED. MOTORISTS DRIVING WEST ON HIGHWAY 90 AT THIS TIME SHOULD EXPECT TO ENCOUNTER THIS WEATHER...WEST OF THE PECOS IN THE NEXT TWO HOURS. AN UPPER ATMOSPHERE DISTURBANCE JUST NORTH OF THE BIG BEND ACROSS THE PECOS WAS MOVING SLOWLY NORTHEAST AND PERIODICALLY SPEWING OUT BANDS OF SHOWERS AND THUNDERSTORMS. THIS ACTIVITY IS ONLY THE LATEST ROUND| AND MORE MAY FOLLOW TONIGHT BEOFRE THE DISTURBANCE CLEARS THE AREA. ADDITIONAL STATEMENTS WILL BE ISSUED IF CONDITIONS WARRANT SO STAY TUNED TO YOUR LOCAL T.V. RADIO OR THE NOAA WEATHER RADIO.
Special weather statement, Jul 16, 8:45 PM CDT, 4 hours 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 845 PM CDT THU JUL 16 1987 AT 840 PM CDT A BROKEN BAND OF SHOWERS AND OCCASIONALLY INTENSE THUNDERSTORMS WAS INDICATED BY RADAR. THIS WEATHER ACTIVITY WAS ALONG THE PECOS VALLEY FROM NORTH OF THE COUNTY LINE...THROUGH THE WESTERN PART OF THE COUNTY AND PASSED SOUTHEASTWARD INTO MEXICO ABOUT 20 MILES WEST OF DEL RIO. THE SHOWERS AND THUNDERSTORMS WERE MOVING BASICLY EAST AT AROUND 20 MPH. THESE SHOWERS AND THUNDERSTORMS SHOULD VERY SHORTLY START AFFECTING THE LAKE AMISTAD AREA AND BOATERS MIGHT NOW THINK OF SAFETY PRECAUTIONS. AS THE THUNDERSTORMS IN THIS BAND MOVE THROUGH THE COUNTY STRONG GUSTS OF WIND TO 50 MPH AND PERIODS OF HEAVY RAIN MAY BE EXPERIENCED. MOTORISTS SHOULD BE ALERT TO FLOODING OF LOW WATER CROSSINGS BOTH INSIDE THE CITY OF DEL RIO AND THE COUNTY IN THE NEXT THREE HOURS. AN UPPER ATMOSPHERE DISTURBANCE JUST NORTH OF THE BIG BEND ACROSS THE PECOS WAS MOVING SLOWLY NORTHEAST AND PERIODICALLY SPEWING OUT BANDS OF SHOWERS AND THUNDERSTORMS. THIS ACTIVITY IS ONLY THE LATEST ROUND AND MORE MAY FOLLOW TONIGHT BEOFRE THE DISTURBANCE CLEARS THE AREA. ADDITIONAL STATEMENTS WILL BE ISSUED IF CONDITIONS WARRANT SO STAY TUNED TO YOUR LOCAL T.V. RADIO OR THE NOAA WEATHER RADIO.
Special weather statement, Jul 16, 9:54 PM CDT, 3 hours 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 955 PM CDT THU JUL 16 1987 AT 945 PM CDT BROKEN BANDS OF SHOWERS AND OCCASIONALLY HEAVY THUNDERSTORMS WERE INDICATED BY RADAR. THIS WEATHER ACTIVITY COVERS MUCH OF VAL VERDE COUNTY. AT 940 PM CDT THE STRONGEST THUNDERSTORMS WERE IN SOUTHERN CROCKETT COUNTY ALONG HIGHWAY 163 JUST NORTH OF THE VAL VERDE COUNTY LINE. THE SHOWERS AND THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT AROUND 20 MPH. THESE SHOWERS AND THUNDERSTORMS ARE AFFECTING THE LAKE AMISTAD AREA AND BOATERS SHOULD THINK OF SAFETY PRECAUTIONS. AS THE THUNDERSTORMS IN THIS BAND MOVE THROUGH THE COUNTY STRONG GUSTS OF WIND TO 35 MPH AND PERIODS OF HEAVY RAIN MAY BE EXPERIENCED. MOTORISTS SHOULD BE ALERT TO FLOODING OF LOW WATER CROSSINGS PARTICULARLY IN THE NORTH OF THE COUNTY NEAR HIGHWAY 163. A STRONG LIGHTNING DISPLAY WAS IN PROGRESSS AND ALL PERSONS SHOULD EXERCISE CAUTION. REMEMBER INSIDE A BUILDING ARE THE SAFEST PLACE DURING A LIGHTNING STORM. AN UPPER ATMOSPHERE DISTURBANCE JUST NORTH OF THE BIG BEND ACROSS THE PECOS WAS MOVING SLOWLY NORTHEAST AND PERIODICALLY SPEWING OUT BANDS OF SHOWERS AND THUNDERSTORMS. THIS ACTIVITY IS ONLY THE LATEST ROUND& AND MORE MAY FOLLOW TONIGHT BEOFRE THE DISTURBANCE CLEARS THE AREA.
Special weather statement, Jul 16, 11:18 PM CDT, 1 hour 43 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 1120 PM CDT THU JUL 16 1987 ...THUNDERSTORMS INCREASING OVER HILL COUNTRY AND EDWARDS PLATEAU... A SLOW MOVING UPPER AIR DISTURBANCE OVER SOUTHWEST TEXAS WAS TRIGGERING THE DEVELOPMENT OF SCATTERED SHOWERS AND THUNDERSTORMS OVER PORTIONS OF THE TEXAS HILL COUNTRY AND EDWARDS PLATEAU TONIGHT. SOME OF THE THUNDERSTORMS...ESPECIALLY OVER EASTERN VAL VERDE AND WESTERN EDWARDS COUNTIES WERE PRODUCING VERY HEAVY RAINFALL. ESTIMATES FROM RADAR INDICATED RAINFALL RATES ON THE ORDER OF 3 TO 4 INCHES PER HOUR TO BE OCCURRING IN THE STRONGEST THUNDERSTORMS. MOVEMENT WAS NORTHEAST AT 15 MILES AN HOUR. MANY SECTIONS OF THE HILL COUNTRY AND EDWARDS PLATEAU ARE IN NEED OF GOOD RAINS AND WIDESPREAD FLOODING IS NOT ANTICIPATED TO BE A PROBLEM. HOWEVER...THE RATE AT WHICH THE RAIN IS FALLING MAY PRODUCE TEMPORARY FLOODING OF LOW WATER CROSSINGS AND URBAN STREETS IN SOME LOCATIONS. MOTORISTS SHOULD BE PARTICULARLY ALERT TO THIS POSSIBILITY. THESE SHOWERS AND THUNDERSTORMS ARE EXPECTED TO REMAIN ACTIVE THROUGH MUCH OF TONIGHT AND MOVE INTO PORTIONS OF SOUTH CENTRAL TEXAS BEFORE MORNING. ADDITIONAL STATEMENTS WILL ]BE ISSUED AS CONDITIONS WARRANT. THESE WILL BE BROADCAST OVER LOCAL RADIO...TV AND NOAA WEATHER RADIO.
Special weather statement, Jul 17, 12:25 AM CDT, 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 1225 AM CDT FRI JUL 17 1987 ...STRONG THUNDERSTORMS OVER WESTERN GILLESPIE COUNTY... AUSTIN RADAR WAS INDICATING STRONG THUNDERSTORMS OVER WESTERN PORTIONS OF GILLISPIE COUNTY...OTHER STRONG THUNDERSTORMS WERE INDICATED TO THE WEST OF LLANO AND SAN SABA COUNTIES. MOVEMENT WAS TOWARDS THE NORTHEAST 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.
Special weather statement, Jul 17, 12:27 AM CDT, 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
1225 AM CDT FRI JUL 17 1987
...STRONG THUNDERSTORMS OVER WESTERN GILLESPIE COUNTY...
AUSTIN RADAR WAS INDICATING STRONG THUNDERSTORMS OVER WESTERN PORTIONS OF
GILLISPIE COUNTY...OTHER STRONG THUNDERSTORMS WERE INDICATED TO THE WEST
OF LLANO AND SAN SABA COUNTIES. MOVEMENT WAS TOWARDS THE NORTHEAST 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.
ADDITIONAL STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT.The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 1:58 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 |
| Jul 17, 6:19 AM CDT | Flash Flood Warning | EWX | Blanco, Gillespie | 3 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.