Alert archive / Texas / Flash Flood Warnings in 1987
Flash Flood Warning 3, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 5, 1987, 6:54 PM CDT for Webb County, Texas. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- May 5, 1987, 6:54 PM CDT (23:54 UTC)
- Expired
- May 5, 1987, 9:00 PM CDT
- In force
- 2 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Webb 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 12:00Z, 11.9 hours before the alert went out and 232 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
- 1028 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 797 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSAT 052354
FFWSAT
TXC479-060200-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
654 PM CDT TUE MAY 5 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 900 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH TEXAS
...WEBB
THE DEPARTMENT OF PUBLIC SAFETY IN LAREDO REPORTS THAT HEAVY RAIN IN
THE PAST HOUR HAS PRODUCED FLASH FLOODING IN THE CITY OF LAREDO.
MOTORISTS ARE REPORTED TO BE STRANDED WITH WATER CONTINUING TO RISE
IN MANY SECTIONS OF THE CITY.
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.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 5, 4:27 PM CDT, 2 hours 27 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 425 PM CDT TUE MAY 5 1987 THUNDERSTORMS THAT FORMED IN THE EARLY AFTERNOON OVER SOUTH CENTRAL TEXAS HAVE CONTINUED TO INCREASE IN BOTH INTENSITY AND COVERAGE. AT 420 PM CDT THIS AFTERNOON...WEATHER SERVICE RADAR INDICATED AN AREA OF SCATTERED THUNDERSTORMS COVERING MOST OF SOUTH CENTRAL TEXAS. THE MOST INTENSE STORMS WERE LOCATED FROM GONZALES ACROSS FLORESVILLE AND JOURDANTON TO NEAR CRYSTAL CITY. THE STORMS WERE MOVING TO THE NORTH AT BETWEEN 5 AND 10 MILES AN HOUR. BECAUSE OF THEIR SLOW MOVEMENT...THE MORE INTENSE STORMS ARE LIKELY TO PRODUCE RAIN ACCUMULATIONS REACHING 1 TO 2 INCHES IN SOME LOCATIONS. WATER MAY BEGIN TO COLLECT IN LOW LYING AND POORLY DRAINED AREAS. MOTORISTS NEED TO BE ALERT WHEN DRIVING NEAR AREAS OF HEAVY RAINFALL AND BE CAREFUL NOT TO DRIVE INTO DEEP WATER.
Special weather statement, May 5, 5:10 PM CDT, 1 hour 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 510 PM CDT TUE MAY 5 1987 AT 505 PM CDT SCATTERED THUNDERSTORMS CONTINUED ACROSS A LARGE PORTION OF SOUTH CENTRAL TEXAS. THE MOST INTENSE STORMS WERE LOCATED FROM GONZALES TO FLORESVILLE AND JOURDANTON TO NEAR CRYSTAL CITY...AS WELL AS FROM COTULLA TO JUST NORTH OF LAREDO. HEAVY RAIN WAS ALSO INDICATED IN EXTREME SOUTHERN BEXAR COUNTY. THE STORMS WERE MOVING TO THE NORTHEAST AT BETWEEN 5 AND 10 MILES AN HOUR. PEA SIZED HAIL WAS REPORTED AT BEBE...10 MILES SOUTHWEST OF GONZALES... AT 415 PM THIS AFTERNOON. PEA TO MARBLE SIZED HAIL WAS INDICATED IN EXTREME SOUTHERN BEXAR COUNTY NEAR 500 PM THIS AFTERNOON. ADDITIONAUL SMALL HAIL...ALONG WITH VERY HEAVY DOWNPOURS AND BRIEF GUSTY WINDS ARE LIKELY WITH THESE SLOW MOVING THUNDERSTORMS. WATER MAY BEGIN TO COLLECT IN LOW LYING AND POORLY DRAINED AREAS AND MOTORISTS MUST AVOID DRIVING INTO DEEP WATER.
Special weather statement, May 5, 6:04 PM CDT, 50 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 605 PM CDT TUE MAY 5 1987 SCATTERED THUNDERSTORMS WERE INDICATED BY WEATHER SERVICE RADAR AT 600 PM CDT CONTINUING OVER MUCH OF SOUTH CENTRAL TEXAS. THE MOST INTENSE STORMS WERE LOCATED NORTH OF LAREDO IN WEBB COUNTY AND FROM NEAR SEGUIN INTO SOUTHERN BEXAR COUNTY JUST SOUTH OF SAN ANTONIO. THE ACTIVITY WAS MOVING TO THE NORTHEAST AT 5 TO 10 MILES AN HOUR. NO SEVERE WEATHER HAS BEEN INDICATED IN THESE STORMS...HOWEVER SMALL HAIL AND VERY HEAVY RAINFALL HAVE BEEN REPORTED. BRIEF GUSTY WINDS AND VERY INTENSE LIGHTNING DISCHARGES ARE LIKELY WITH THESE SLOW MOVING THUNDERSTORMS. EVERYONE SHOULD REMEMBER THAT LIGHTNING IS ONE OF THE MORE FREQUENT CAUSES OF WEATHER RELATED DEATHS IN SOUTH TEXAS. FOR SAFETY...MOVE INDOORS...STAY AWAYS FROM DOORS AND WINDOWS AND DO NOT USE THE TELEPHONE.
Special weather statement, May 5, 6:38 PM CDT, 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 635 PM CDT MON MAY 5 1987 RADAR INDICATED VERY STRONG THUNDERSTORMS NEAR LULING...NORTH OF LEXINGTON AND EAST OF ROCKDALE. THESE THUNDERSTORMS WILL LIKELY PRODUCE SMALL HAIL...STRONG GUSTY WINDS AND LOCAL HEAVY RAIN. THESE THUNDERSTORMS ARE MOVING VERY SLOW NORTHWARD. CONSIDERABLE SMALL...ABOUT 1/4 INCH...HAIL WAS REPORTED IN PART OF LULING.
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.