Alert archive / Texas / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 56, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 14, 1987, 11:25 PM CDT for Val Verde County, Texas. It was in force for 65 min.
The area
The counties it named.
The facts
- Issued
- May 14, 1987, 11:25 PM CDT (04:25 UTC)
- Expired
- May 15, 1987, 12:30 AM CDT
- In force
- 65 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Val Verde 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, 4.4 hours before the alert went out and 66 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
- 3535 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 1144 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- -12 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDRT 150424 SVRDRT TXC465-150530- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DEL RIO TX 1125 PM CDT THU MAY 14 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1230 AM CST FOR PEOPLE IN THE FOLLOWING COUNTY IN SOUTHCENTRAL TEXAS...VAL VERDE AT 1122 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES SOUTHWEST OF DEL RIO MOVING TOWARD DEL RIO AT 12 MPH. PEOPLE IN THE DEL RIO AREA SHOULD TAKE COVER NOW. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH..DESTRUCTIVE HAIL..DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.B HEAVY RAINS FLOOD ROADS QUICKLY SO DONT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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, May 14, 5:28 PM CDT, 5 hours 57 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 525 PM CDT THU MAY 14 1987 WEATHER RADAR SHOWS A LINE OF THUNDERSTORMS FROM NORTHEAST OF GEORGETOWN TO LAKE LBJ THEN SOUTHWEST TO NEAR FREDERICKSBURG. STRONG THUNDERSTORMS WERE INDICATED NEAR FREDERICKSBURG... STONEWALL MARBLE FALLS AND BERTRAM. THE MOST INTENSE THUNDERSTORM IS BETWEEN GRANGER AND GEORGETOWN. PEA TO MARBLE SIZE HAIL AND STRONG GUSTY WINDS ALONG WITH LOCALIZED HEAVY RAIN IS A THREAT WITH THESE THUNDERSTORMS THIS AFTERNOON. THUNDERSTORMS ARE MOVING SLOWLY SOUTH.
Special weather statement, May 14, 6:31 PM CDT, 4 hours 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 525 PM CDT THU MAY 14 1987 WEATHER RADAR SHOWS A LONE... BUT INTENSE THUNDERSTORM A LITTLE NORTHWEST OF JOHNSON CITY... NEAR SANDY. THIS STORM IS MOVING ONLY VERY SLOWLY TO THE SOUTH AND AS A RESULT SOME LOCALIZED FLOODING OF SMALL CREEKS AND LOW WATER CROSSINGS IS POSSIBLE IN BLANCO COUNTY FOR THE NEXT HOUR OR SO. EARLIER THIS EVENING... AROUND 5 PM GRANGER RECORDED A LITTLE OVER 1 INCH OF RAIN AND MARBLE SIZE COVERED THE GROUND.
Special weather statement, May 14, 6:34 PM CDT, 4 hours 51 minutes before
SPECIAL WEATHER STATEMENT... CORRECTED FOR TIME NATIONAL WEATHER SERVICE AUSTIN TX 625 PM CDT THU MAY 14 1987 WEATHER RADAR SHOWS A LONE... BUT INTENSE THUNDERSTORM A LITTLE NORTHWEST OF JOHNSON CITY... NEAR SANDY. THIS STORM IS MOVING ONLY VERY SLOWLY TO THE SOUTH AND AS A RESULT SOME LOCALIZED FLOODING OF SMALL CREEKS AND LOW WATER CROSSINGS IS POSSIBLE IN BLANCO COUNTY FOR THE NEXT HOUR OR SO. EARLIER THIS EVENING... AROUND 5 PM GRANGER RECORDED A LITTLE OVER 1 INCH OF RAIN AND MARBLE SIZE COVERED THE GROUND.
Special weather statement, May 14, 7:15 PM CDT, 4 hours 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 710 PM CDT THU MAY 14 1987 WEATHER RADAR SHOWS THUNDERSTORMS HAVE DECREASED RAPIDLY OVER CENTRAL TEXAS AREA DURING THE LAST HOUR AND ONLY LIGHWT SHOWERS WAS LOCATED BETWEEN JOHNSON CITY AND MARBLE FALLS...ALSO NEAR BERTRAM. THIS WILL BE THE LAST STATEMENT UNLESS THUNDERSTORMS REDEVELOPE OVER THE CENTRAL TEXAS AREA.
Special weather statement, May 14, 11:09 PM CDT, 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 1107 PM CDT THU MAY 14 1987 VERY HEAVY THUNDERSTORMS OVER MEXICO AROUND 30 MILES SOUTHWEST OF DEL RIO ARE BUILDING SLOWLY TO THE NORTHEAST. IF THESE THUNDERSTORMS CONTINUE TO BUILD TO THE NORTHEAST...THERE IS A POSSIBILITY THAT A STORM COULD MOVE INTO THE CITY OF DEL RIO SOMETIME AFTER MIDNIGHT TONIGHT. STRONG GUSTY WINDS...LOCALLY HEAVY RAIN...FREQUENT LIGHTNING AND SMALL HAIL CAN BE EXPECTED WITH THESE THUNDERSTORMS. OTHER THUNDERSTORMS CONTINUE OVER MEXICO TO THE WEST AND SOUTHWEST OF EAGLE PASS. LITTLE MOVEMENT WAS NOTED OF THE INDIVIDUAL THUNDERSTORMS ALTHOUGH THE AREA OF THUNDERSTORM ACTIVITY APPREARS TO BE 9BUILDING TO THE NORTH AND NORTHEAST.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 12:30 AM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 75 min |
| May 15, 2:14 AM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 61 min |
| May 15, 3:45 AM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 60 min |
| May 15, 4:45 AM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 30 min |
| May 15, 5:12 AM CDT | Severe Thunderstorm Warning | EWX | Medina | 48 min |
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.