Alert archive / Texas / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 50, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 13, 1987, 10:12 AM CDT for Guadalupe County, Wilson County, Texas. It was in force for 63 min.
The area
The counties it named.
The facts
- Issued
- May 13, 1987, 10:12 AM CDT (15:12 UTC)
- Expired
- May 13, 1987, 11:15 AM CDT
- In force
- 63 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Guadalupe County, TX, Wilson 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 12:00Z, 3.2 hours before the alert went out and 123 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
- 2156 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 542 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 13, 4:16 AM CDT, 5 hours 56 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 415 AM CDT WED MAY 13 1987 ...THUNDERSTORMS DEVELOPING OVER THE HILL COUNTRY AND EDWARDS PLATEAU... STRONG THUNDERSTORMS HAVE DEVELOPED DURING THE PAST HOUR OVER PORTIONS OF THE TEXAS HILL COUNTRY AND EDWARDS PLATEAU. AT 410 AM CDT...THE STRONGEST STORMS WERE LOCATED OVER CENTRAL AND EASTERN KINNEY COUNTY... EXTENDING EASTWARD INTO UVALDE COUNTY. MOVEMENT WAS NORTH AT NEAR 10 MILES AN HOUR. THESE STORMS WILL NOT LIKELY PRODUCE ANYTHING IN THE WAY OF SEVERE WEATHER...BUT VERY HEAVY RAIN WITH LOCALIZED FLOODING IS A DEFINITE THREAT. IN ADDITION...THE STRONGEST STORMS CAN BE EXPECTED TO PRODUCE SMALL HAIL AND BRIEFLY GUSTY WIND. THE DEVELOPMENT OF THESE THUNDERSTORMS IS ASSOCIATED WITH A WEAK DISTURBANCE IN THE UPPER LEVELS OF THE ATMOSPHERE THAT IS TRACKING SLOWLY TO THE NORTHEAST. ADDITIONAL STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT. THESE STqATEMENTS WILL BE BROADCAST OVER NOAA WEATHER RADIO...YOUR BEST SOURCE FOR THE LATEST WEATHER INFORMATION.
Special weather statement, May 13, 5:40 AM CDT, 4 hours 32 minutes before
BULLETIN SMALL STREAM FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 540 AM CDT WED MAY 13 1987 FLOODING OF SMALL STREAMS AND CREEKS IS LIKELY IN REAL...NORTHERN KINNEY AND NORTHERN UVALDE COUNTIES THIS MORNING. PERSONS LIVING NEAR SMALL STREAMS OR CREEKS SHOULD LISTEN FOR THE LATEST INFORMATION AND BE PREPARED TO MOVE TO A PLACE OF SAFETY SHOULD FLOODING OCCUR. MODERATE TO HEAVY RAIN HAS BEEN FALLING OVER PORTIONS OF THE TEXAS HILL COUNTRY AND EDWARDS PLATEAU FOR LAST FEW HOURS. ESTIMATES FROM RADAR INDICATE AS MUCH AS 3 TO 4 INCHES OF RAIN MAY HAVE FALLEN IN ISOLATED SECTIONS OF NORTHERN KINNEY AND UVALDE COUNTIES AS WELL AS SOUTHERN REAL COUNTY. THE HEAVY RAIN AND ASSOCIATED RAPID RUNOFF WILL LIKELY PRODUCE A STEADY RISE IN STREAMS AND CREEKS FOR THE NEXT FEW HOURS. ADDITIONAL STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT.
Special weather statement, May 13, 8:36 AM CDT, 1 hour 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 835 AM CDT WED MAY 13 1987 THUNDERSTORMS...SOME PRODUCING MODERATE TO LOCALLY HEAVY RAINFALL RATES...CONTINUE IN PARTS OF REAL...KINNEY...UVALDE AND MEDINA COUNTIES. DUE TO THE SLOW MOVEMENT OF THESE THUNDERSTORMS...LOCALIZED FLOODING OF LOW-WATER CROSSINGS...CREEKS...FARM-TO-MARKET ROADS AND HIGHWAYS MAY OCCUR THIS MORNING. MOTORISTS SHOULD BE ALERT WHILE DRIVING NEAR FLOOD-PRONE LOW-LYING AREAS AND NOT ATTEMPT TO CROSS SWOLLEN CREEKS OR RAPIDLY-FLOWING LOW-WATER CROSSINGS. PARENTS SHOULD MAKE SURE THAT CHILDREN ARE KEPT AWAY FROM CREEKS AND FLOOD DRAINAGE DITCHES SUBJECT TO SUDDEN RISES. AS MORE INFORMATION BECOMES AVAILABLE...ADDITIONAL STATEMENTS OR POSSIBLE WARNINGS WILL BE ISSUED...SO PLEASE STAY TUNED.
Special weather statement, May 13, 9:06 AM CDT, 1 hour 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 905 AM CDT WED MAY 13 1987 A THUNDERSTORM IS LOCATED NEAR PLEASANTON IN ATASCOSA COUNTY MOVING TOWARD THE EAST AT 10 MPH INTO WILSON AND KENEDY COUNTIES. HONDO RADAR INDICATES SMALL HAIL MAY BE IN THIS THUNDERSTORM...ALONG WITH FREQUENT LIGHTNING...BRIEF HEAVY RAIN AND GUSTY WINDS. PERSONS IN ATASCOSA...WILSON AND KENEDY COUNTIES SHOULD BE ALERT FOR THREATENING WEATHER CONDITIONS FOR ANOTHER HOUR OR TWO. WITHIN THE PAST HOUR...PEA-SIZED HAIL WAS OBSERVED AT THE WEATHER SERVICE OFFICE IN HONDO. THE THUNDERSTORM THAT PRODUCED THE HAIL IS MOVING EAST ACROSS MEDINA COUNTY TOWARD WESTERN BEXAR COUNTY AT THIS TIME. ADDITIONAL STATEMENTS OR BULLETINS WILL BE ISSUED AS INFORMATION BECOMES AVAILABLE.
Special weather statement, May 13, 9:10 AM CDT, 1 hour 2 minutes before
SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE SAN ANTONIO TX 910 AM CDT WED MAY 13 1987 A THUNDERSTORM IS LOCATED NEAR PLEASANTON IN ATASCOSA COUNTY MOVING TOWARD THE EAST AT 10 MPH INTO WILSON AND KARNES COUNTIES. HONDO RADAR INDICATES SMALL HAIL MAY BE IN THIS THUNDERSTORM...ALONG WITH FREQUENT LIGHTNING...BRIEF HEAVY RAIN AND GUSTY WINDS. PERSONS IN ATASCOSA...WILSON AND KENEDY COUNTIES SHOULD BE ALERT FOR THREATENING WEATHER CONDITIONS FOR ANOTHER HOUR OR TWO. WITHIN THE PAST HOUR...PEA-SIZED HAIL WAS OBSERVED AT THE WEATHER SERVICE OFFICE IN HONDO. THE THUNDERSTORM THAT PRODUCED THE HAIL IS MOVING EAST ACROSS MEDINA COUNTY TOWARD WESTERN BEXAR COUNTY AT THIS TIME. ADDITIONAL STATEMENTS OR BULLETINS WILL BE ISSUED AS INFORMATION BECOMES AVAILABLE.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 9:19 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Bexar, Medina | 56 min |
| May 13, 10:12 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Bexar | 53 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.