Alert archive / Texas / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 149, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jul 17, 1987, 4:21 AM CDT for Real County, Uvalde County, Texas. It was in force for 54 min.
The area
The counties it named.
The facts
- Issued
- Jul 17, 1987, 4:21 AM CDT (09:21 UTC)
- Expired
- Jul 17, 1987, 5:15 AM CDT
- In force
- 54 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Real County, TX, Uvalde 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, 9.4 hours before the alert went out and 104 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 170921
SVRSAT
TXC385-463-171015-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
421 AM CDT FRI JUL 17 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 515 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTH TEXAS
...SOUTHERN REAL...NORTHERN UVALDE
A SEVERE THUNDERSTORM WAS LOCATED ALONG THE REAL UVALDE BORDER MOVING
EAST AT ABOUT 8 MPH. THIS STORM WAS INDICATED BY RADAR AS HAVING
HAIL.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...HAIL
3/4 INCH OR MORE IN DIAMETER...FREQUENT LIGHTNING AND VERY HEAVY
RAIN.
REMEMBER...SEVERE THUNDERSTORMS CAN AND @OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO WARNING.
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.What forecasters said that day
The local office's own words before this severe thunderstorm 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, 12:25 AM CDT, 3 hours 56 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, 3 hours 54 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.Special weather statement, Jul 17, 2:21 AM CDT, 2 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 215 AM CDT FRI JUL 17 1987 ...STRONG THUNDERSTORMS OVER GILLESPIE AND SAN SABA COUNTIES... AUSTIN RADAR WAS INDICATING STRONG THUNDERSTORMS WITH HEAVY RAINFALL OVER GILLISPIE AND SAN SABA COUNTIES MOVING TOWARDS THE NORTHEAST INTO MILLS...LAMPASAS AND LLANO COUNTIES WITHIN THE NEXT HOUR. 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 OVER GILLISPIE COUNTY OVER THE PAST FEW HOURS.
Special weather statement, Jul 17, 3:43 AM CDT, 38 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.
Special weather statement, Jul 17, 3:48 AM CDT, 33 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, 32 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.
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, 4:55 AM CDT | Flash Flood Warning | EWX | Kerr | 4 hr |
| Jul 17, 6:19 AM CDT | Flash Flood Warning | EWX | Blanco, Gillespie | 3 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 1987Every severe thunderstorm 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.