Alert archive / Texas / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 57, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 15, 1987, 12:30 AM CDT for Val Verde County, Texas. It was in force for 75 min.
The area
The counties it named.
The facts
- Issued
- May 15, 1987, 12:30 AM CDT (05:30 UTC)
- Expired
- May 15, 1987, 1:45 AM CDT
- In force
- 75 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, 5.5 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 6:31 PM CDT, 5 hours 59 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, 5 hours 56 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, 5 hours 15 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, 1 hour 21 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 14, 11:25 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 65 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.