Alert archive / Texas / Flash Flood Warnings in 1987
Flash Flood Warning 9, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 19, 1987, 8:09 PM CDT for Guadalupe County, Texas. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- May 19, 1987, 8:09 PM CDT (01:09 UTC)
- Expired
- May 19, 1987, 11:15 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Guadalupe 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
Victoria Regiona, TX (KVCT), launched 00:00Z, 1.2 hours before the alert went out and 130 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
- 1600 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 870 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSAT 200109
FFWSAT
TXC187-200415-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
809 PM CDT TUE MAY 19 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1115 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH TEXAS
...GUADALUPE
BETWEEN 3 AND 4 INCHES OF RAIN HAVE FALLEN OVER GUADALUPE COUNTY AND
HEAVY RAINS CONTINUE TO FALL. SMALL STREAMS ARE OUT OF THEIR BANKS
AND THE LARGER RIVERS ARE BEGINNING TO RISE. MANY LOCAL ROADS ARE
LIKELY FLOODED AND CONDITIONS WILL ONLY WORSEN.
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.
PLEASE LISTEN TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO STATION
FOR LATER STATEMENTS OR WARNINGS REGA[RDING 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 19, 2:33 PM CDT, 5 hours 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 232 PM CDT TUE MAY 19 1987 ...STRONG THUNDERSTORM WITH SMALL HAIL LOCATED JUST SOUTH OF SAN MARCOS... WIDELY SCATTERED BUT VERY SHORT-LIVED> INTENSE THUNDERSTORMS CONTINUE TO RAPIDLY FORM AND MOVE NORTHWARD AT 20 MPH OVER CENTRAL TEXAS. THE HEAVIEST RAINS WERE NORTH OF GEORGETOWN...NEAR JARRELL AND ABOUT HALF WAY BETWEEN SAN MARCOS AND SEGUIN.
Special weather statement, May 19, 3:17 PM CDT, 4 hours 52 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 315 PM CDT TUE MAY 19 1987 AT 310 PM CDT A LINE OF THUNDERSTORMS HAD DEVELOPED SOUTH OF COMSTOCK AND EXTENDED TO THE NORTHERN VAL VERDE COUNTY LINE. OTHER THUNDERSTORMS WERE IN NORTHEASTERN PART OF THE COUNTY. THE LARGEST THUNDERSTORM WAS NEAR COMSTOCK. THE STORMS WERE MOVING NORTHEAST AT 15 MILES AN HOUR. HEAVY RAIN...SMALL HAIL...FREQUENT DANGEROUS LIGHTNING AND STRONG GUSTY WIND|S ARE POSSIBLE WITH THE STORMS.
Special weather statement, May 19, 3:23 PM CDT, 4 hours 46 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 320 PM CDT TUE MAY 19 1987 ...STRONG THUNDERSTORMS WITH SMALL HAIL SCATTERED AROUND CENTRAL TEXAS... NUMEROUS SMALL... BUT QUITE INTENSE THUNDERSTORMS CONTINUE TO DEVELOP AND MOVE NORTHWARD AT 20 MPH OVER CENTRAL TEXAS. THE HEAVIEST RAINS WERE ALONG A 30 MILE WIDE BAND FROM CENTRAL BELL COUNTY TO LAKE TRAVIS... NEW BRAUNFELS AND ON SOUTH OF SAN ANTONIO.
Special weather statement, May 19, 4:20 PM CDT, 3 hours 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 420 PM CDT TUE MAY 19 1987 AT 415 PM CDT LOCAL WEATHER RADAR SHOWED WIDESPREAD THUNDERSTORMS OVER NEARLY ALL OF THE CENTRAL TEXAS AREA. VERY INTENSE THUNDERSTORMS WERE LOCATED IN SOUTHWEST HAYS COUNTY AND IN EASTERN HAYS COUNTY. THESE INTENSE THUNDERSTORMS ARE MOVING NORTH AT 20 TO 30 MPH AND WILL BE MOVING ACROSS HAYS COUNTY AND INTO TRAVIS COUNTY BY 5 PM. OTHER INTENSE THUNDERSTORMS WERE LOCATED JUST SOUTH OF BURNET AND NEAR JOHNSON CITY. A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR ALL OF CENTRAL UNTIL 9 PM THIS TUESDAY EVENING. RUSH HOUR MOTORISTS IN AUSTIN SHOULD ANTICIPATE SOME HEAVY RAIN AND POSSIBLE SMAALL HAIL ALONG WITH STRONG GUSTY WINDS WHILE DRIVING HOME.
Special weather statement, May 19, 6:18 PM CDT, 1 hour 51 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 615 PM CDT TUE MAY 19 1987 AT 6 PM CDT LOCAL WEATHER RADAR SHOWED WIDESPREAD THUNDERSTORMS OVER NEARLY ALL OF THE CENTRAL TEXAS AREA. AN INTENSE THUNDERSTORM WAS LOCATED JUST SOUTH OF AUSTIN OVER SOUTHERN TRAVIS COUNTY AND NORTHERN CALDWELL COUNTY MOVING TOWARDS BASTROP COUNTY. THIS THUNDERSTORM MAY PRODUCE BRIEF HEAVY RAINFALL...GUSTY WINDS TO NEAR 40 MPH...SMALL HAIL AND FREQUENT LIGHTNING AS IT MOVES TOWARDS AND INTO BASTROP COUNTY. A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR ALL OF CENTRAL UNTIL 9 PM THIS TUESDAY EVENING.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:26 PM CDT | Flash Flood Warning | EWX | Bexar | 3 hr |
| May 19, 8:00 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 60 min |
| May 19, 8:28 PM CDT | Tornado Warning | EWX | Bexar | 62 min |
| May 19, 8:50 PM CDT | Severe Thunderstorm Warning | EWX | McMullen | 55 min |
| May 19, 9:16 PM CDT | Severe Thunderstorm Warning | EWX | Guadalupe | 59 min |
| May 19, 9:39 PM CDT | Severe Thunderstorm Warning | EWX | Wilson | 66 min |
| May 19, 10:55 PM CDT | Severe Thunderstorm Warning | EWX | Gonzales, Karnes | 65 min |
| May 19, 11:20 PM CDT | Severe Thunderstorm Warning | EWX | DeWitt | 55 min |
| May 20, 12:05 AM CDT | Severe Thunderstorm Warning | EWX | Lavaca | 55 min |
| May 20, 5:44 PM CDT | Severe Thunderstorm Warning | EWX | Frio | 61 min |
| May 20, 6:13 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 2 hr |
| May 20, 6:39 PM CDT | Severe Thunderstorm Warning | EWX | Frio | 66 min |
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.