Alert archive / Texas / Flash Flood Warnings in 1987
Flash Flood Warning 12, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 29, 1987, 3:19 AM CDT for 4 counties in Texas. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- May 29, 1987, 3:19 AM CDT (08:19 UTC)
- Expired
- May 29, 1987, 7:15 AM CDT
- In force
- 4 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Bandera County, TX, Kendall County, TX, 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, 8.3 hours before the alert went out and 162 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
- 4195 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 880 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 111 m²/s²
- Significant tornado parameter
- 2.3
- Supercell composite
- 10.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSAT 290819
FFWSAT
TXC019-259-265-325-385-463-291215-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
319 AM CDT FRI MAY 29 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 715 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTH TEXAS
...BANDERA...KENDALL...KERR
...MEDINA...REAL...UVALDE
SEVERE THUNDERSTORMS PRODUCING LARGE HAIL...FREQUENT LIGHTNING AND
GUSTY WINDS HAVE CONTINUED ACROSS THE HILL COUNTRY AND EDWARDS
PLATEAU THIS MORNING. SOME OF THESE THUNDERSTORMS HAVE ALSO PRODUCED
HEAVY RAINFALL IN A SHORT PERIOD OF TIME WHICH WILL LIKELY CAUSE
FLASH FLOODING. THE WATERSHEDS OF THE GUADALUPE...MEDINA...FRIO AND
SABINAL RIVERS...AND THEIR CREEKS AND TRIBUTARIES...WILL BE MOST
AFFECTED BY RUNOFF FROM THESE HEAVY RAINS. AMOUNTS APPROACHING THREE
INCHES HAVE ALREADY BEEN REPORTED IN SOME HILL COUNTRY AREAS...AN
ADDITIONAL 3 TO 5 INCHES COULD OCCUR. SINCE THE GROUND IS ALREADY
SATURATED FROM PRIOR RAINS...ANY MORE RAIN WILL NOT SOAK IN BUT RUN
OFF AND GREATLY ADD TO THE THREAT OF FLASH FLOODING.
CAMPERS AND HIKERS IN GARNER STATE PARK AND OTHER HILL COUNTRY
RECREATIONAL AREAS SHOULD MOVE TO HIGHER GROUND AT ONCE. MOTORISTS
SHOULD NOT ATTEMPT TO DRIVE ACROSS LOW-WATER CROSSINGS WHICH ARE
FLOODED. RESIDENTS LIVING CLOSE TO THE FLOOD PLAIN OF HILL COUNTRY
CREEKS AND RIVERS SHOULD BE ALERT AND MOVE TO SAFETY IF HEAVY RAIN OR
FLOODING IS OBSERVED. PARENTS ARE REMINDED TO KEEP CHILDREN AWAY
FROM FLOOD-PRONE DRAINAGE DITCHES...CREEKS AND RIVERS THIS MORNING.
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 THUNDERS9TORMS.
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 28, 11:22 PM CDT, 3 hours 57 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 1117 PM CDT THU MAY 28 1987 ...TORNADO WATCH IS IN EFFECT UNTIL 100 AM CDT FOR VAL VERDE COUNTY INCLUDING THE CITY OF DEL RIO... AT 1112 PM CDT RADAR INDICATED AN AREA THUNDERSTORMS IN THE SOUTHERN HALF OF VAL VERDE COUNTY MOVING TO THE EAST AT AROUND 10 MPH. AN INTENSE STORM WAS LOCATED 20 MILES W OF DEL RIO INSIDE MEXICO MOVING SLOWLY NORTHEAST. HEAVY RAIN HAS FALLEN IN SOME PARTS OF SOUTH VAL VERDE COUNTY AND LOW WATER CROSSINGS AND LOW LYING AREAS EITHER HAVE FLOODED OR COULD FLOOD WITH ANOTHER STRONG DOWNPOUR. THE POTENTIAL FOR SEVERE THUNDERSTORMS EXISTS WITH THE UNSTABLE ATMOSPHERE AND MOIST SOUTHEAST FLOW. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSEIBLE WARNINGS.
Special weather statement, May 29, 12:28 AM CDT, 2 hours 51 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 1228 AM CDT FRI MAY 29 1987 AT 1215 AM CDT RADAR INDICATED AN INTENSE THUNDERSTORM ABOUT 20 MILES WEST OF DEL RIO IN MEXICO MOVING EAST AT AROUND 20 MPH. RADAR IS INDICATING HAIL ASSOCIATED WITH THIS STORM. EXCEPT IN THE EXTREME NORTHWEST THUNDERSTORMS CONTINUE TO ROMP TO THE NORTHEAST ACROSS VAL VERDE COUNTY. HEAVY RAIN HAS FALLEN IN SOME PARTS OF SOUTH VAL VERDE COUNTY AND LOW WATE}R CROSSINGS AND LOW LYING AREAS EITHER HAVE FLOODED OR COULD FLOOD WITH ANOTHER STRONG DOWNPOUR. STRONG GUSTY WINDS...DAMAGING HAIL...AND HEAVY RAIN ARE POSSIBLE WITH A THUNDERSTORM AS INTENSE AS THE ONE NOW NEAR DEL RIO.
Special weather statement, May 29, 1:27 AM CDT, 1 hour 52 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 127 AM CDT FRI MAY 29 1987 ...A SEVERE THUNDERSTORM WATCH COVERS ALL OF VAL VERDE COUNTY UNTIL 7 AM CDT... AT 115 AM CDT RADAR INDICATED A VERY STRONG THUNDERSTORM ABOUT 10 MILES WEST OF DEL RIO IN MEXICO MOVING EAST AT AROUND 25 MPH. THUNDERSTORMS ARE NOW SCATTERED OVER ALL OF VAL VERDE COUNTY. A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 29, 2:06 AM CDT, 1 hour 13 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 200 AM CDT FRI MAY 19 1987 ...VERY INTENSE THUNDERSTORMS NOW MOVING NORTHWARD AND AWAY FROM AUSTIN... JUST BEFORE 2 AM...RADAR SHOWED A LINE OF VERY INTENSE THUNDERSTORMS... TO EXTEND FROM JUST NORTH OF COLLEGE STATION AND AUSTIN THROUGH KERR- VILLE AND ON INTO THE WESTERN HILL COUNTRY. THE STRONGEST STORMS WERE LOCATED NEAR CAMERON...IN MILAM COUNTY AND OVER WILLIAMSON COUNTY NEAR HUTTO AND LEANDER. THOSE INDIVIDUAL STORMS WERE MOVING TOWARDS THE NORTH NORTHEAST AT 30 MPH. NO SEVERE WEATHER HAS BEEN REPORTED TO OR DETECTED BY THIS OFFICE AT THIS TIME BUT CONDITIONS REMAIN VERY UNSTABLE. CONTINUE THE SEVERE THUNDERSTORM WATCH...WHICH COVERS TRAVIS AND ALL SURROUNDING COUNTIES.
Special weather statement, May 29, 2:38 AM CDT, 41 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 138 AM CDT FRI MAY 29 1987 ...A SEVERE THUNDERSTORM WATCH COVERS ALL OF VAL VERDE COUNTY UNTIL 7 AM CDT... AT 125 AM CDT RADAR INDICATED A VERY STRONG THUNDERSTORM ABOUT 10 MILES WEST OF DEL RIO IN MEXICO MOVING EAST AT AROUND 25 MPH. THUNDERSTORMS ARE NOW SCATTERED OVER ALL OF VAL VERDE COUNTY. A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN A0ND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 29, 2:58 AM CDT, 21 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 300 AM CDT FRI MAY 19 1987 ...VERY INTENSE THUNDERSTORMS AND HEAVY RAINS REMAIN ON THE WEST AND NORTH SIDE OF AUSTIN.... LOCAL RADAR SHOWS VERY STRONG THUNDERSTORMS JUST WEST OF THE CITY...NEAR LAKE TRAVIS AND ALSO IN THE ROUND ROCK/GEORGETOWN AREAS. RAINFALL RATES WERE ESTIMATED AT JUST OVER TWO INCHES PER HOUR IN SEVERAL SMALL SPOTS WITHIN THOSE STORMS. AN UNCONFIRMED REPORT OF OVER THREE INCHES HAS FALLEN OUT AT LAKEWAY. THE THREAT OF FLASH FLOODING MAY BECOME MUCH MORE IMPORTANT DURING THE EARLY MORNING HOURS...EVEN THOUGH THESE STORMS HAVE A HIGH POTENTIAL FOR LARGE HAIL AND HIGH WINDS. CONTINUE THE SEVERE THUNDERSTORM WATCH FOR A LARGE PORTION OF CENTRAL AND SOUTH CENTRAL TEXAS...INCLUDING TRAVIS AND ALL SURROUNDING COUNTIES...UNTIL 7 AM.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 7:05 PM CDT | Tornado Warning | EWX | Val Verde | 70 min |
| May 28, 8:20 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 70 min |
| May 28, 9:13 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 62 min |
| May 28, 9:55 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 65 min |
| May 28, 10:18 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 57 min |
| May 28, 11:14 PM CDT | Severe Thunderstorm Warning | EWX | Kinney | 61 min |
| May 29, 12:24 AM CDT | Severe Thunderstorm Warning | EWX | Real, Uvalde | 66 min |
| May 29, 12:24 AM CDT | Severe Thunderstorm Warning | EWX | Kinney | 66 min |
| May 29, 1:35 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Medina, Uvalde | 55 min |
| May 29, 2:32 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Medina | 58 min |
| May 29, 2:35 AM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 2 hr |
| May 29, 3:14 AM CDT | Flash Flood Warning | EWX | Travis, Williamson | 2 hr |
| May 29, 3:19 AM CDT | Flash Flood Warning | EWX | Medina, Uvalde | 4 hr |
| May 29, 3:30 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Kerr, Real, Uvalde | 60 min |
| May 29, 3:30 AM CDT | Severe Thunderstorm Warning | EWX | Kendall | 60 min |
| May 29, 3:30 AM CDT | Severe Thunderstorm Warning | EWX | Medina | 60 min |
| May 29, 4:39 AM CDT | Flash Flood Warning | EWX | Bastrop, Caldwell, Hays | 4 hr |
| May 29, 4:39 AM CDT | Flash Flood Warning | EWX | Lee | 4 hr |
| May 29, 4:39 AM CDT | Flash Flood Warning | EWX | Blanco | 4 hr |
| May 29, 4:55 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Medina, Uvalde | 65 min |
| May 29, 4:58 AM CDT | Severe Thunderstorm Warning | EWX | Kinney, Maverick | 62 min |
| May 29, 7:27 AM CDT | Flash Flood Warning | EWX | Bandera, Medina, Uvalde | 4 hr |
| May 29, 11:58 AM CDT | Flash Flood Warning | EWX | Edwards, Kerr, Real | 3 hr |
| May 29, 1:32 PM CDT | Severe Thunderstorm Warning | EWX | Kerr | 58 min |
| May 29, 2:23 PM CDT | Flash Flood Warning | EWX | Edwards, Kerr, Real | 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.