Alert archive / Texas / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 42, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 4, 1987, 6:21 AM CDT for Guadalupe County, Wilson County, Texas. It was in force for 69 min.
The area
The counties it named.
The facts
- Issued
- May 4, 1987, 6:21 AM CDT (11:21 UTC)
- Expired
- May 4, 1987, 7:30 AM CDT
- In force
- 69 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 00:00Z, 11.4 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
- 3052 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 743 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.5
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 4, 2:41 AM CDT, 3 hours 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 240 AM CDT MON MAY 5 19877 AT 235 AM CDT RADAR INDICATES A LINE OF STRONG THUNDERSTORMS FROM STEPHENVILLE TO 5 MILES EAST OF GOLDTHWAITE...10 MILES WEST OF LAKE BUCHANAN...30 MILES NORTHWEST OF MARBLE FALLS 40 MILES WEST OF KERRVILLE. HEAVY RAINS...HIGH WINDS AND HAIL IS POSSIBLE WITH THESE STORMS. THE LINE IS MOVING TO THE SOUTHEAST NEAR 15 MPH. THE THUNDERSTORMS HAVE WEAKEN IN GONZALES COUNTY. PERSONS SHOULD STAY ALERT AND CHECK FOR THE LATEST WEATHER INFORMATION BEFORE LEAVING FOR WORK. ADDITIONAL STATEMENTS AND WARNINGS WILL BE ISSUED AS CONDITION WARRENT.
Special weather statement, May 4, 3:41 AM CDT, 2 hours 40 minutes before
BULLETIN SMALL STREAM FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 340 AM CDT MON MAY 4 1987 FLOODING OF LOW-WATER CROSSINGS...CREEKS AND ROADS AND HIGHWAYS ADJACENT TO FLOOD-PRONE CREEKS AND RIVERS IN VAL VERDE COUNTY CAN BE EXPECTED FOR THE NEXT SEVERAL HOURS. WEATHER SERVICE RADARS HAVE NOTED THUNDERSTORMS CONTINUE ALMOST STATIONARY IN VAL VERDE COUNTY BETWEEN DEL RIO AND COMSTOCK. LOCALIZED FLOODING OF LOW-LYING AREAS ALONG US 90 AND ALONG US 277 AND US 377 MAY BE IN PROGRESS DUE TO THE RAINS THAT HAVE PERSISTED THIS MORNING. MOTORISTS SHOULD BE ESPECIALLY CAUTIOUS AND AVOID FLOOD-PRONE ROADS...HIGHWAYS AND LOW-WATER CROSSINGS. RESIDENTS CLOSE TO NORMALLY DRY ARROYOS AND CREEK BEDS SHOULD ALSO STAY ALERT FOR RAPIDLY RISING WATERS. IF THE RAINS CONTINUE...A FLASH FLOOD WARNING MAY BE REQUIRED. ADDITIONAL STATEMENTS OR BULLETINS WILL BE ISSUED THIS MORNING AS CONDITIONS WARRANT...SO PLEASE STAY TUNED.
Special weather statement, May 4, 3:47 AM CDT, 2 hours 34 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 345 AM CDT MON MAY 4 1987 AT 340 AM CDT RADAR INDICATED A BROKEN LINE OF THUNDERSTORMS EXTENDING FROM THE FORT WORTH METROPLEX AREA TO HILLSBORO NEAR TEMPLE TO FREDERICKSBURG TO EAST OF DEL RIO IN KINNEY COUNTY. THIS LINE OF THUNDERSTORMS IS MOVING EAST SOUTHEAST AT 20 MPH. MODERATE TO HEAVY RAINFALL...FREQUENT LIGHTNING AND POSSIBLE SMALL HAIL WILL LIKELY OCCUR AS THESE THUNDERSTORMS CONTINUE TO MOVE ACROSS SOUTH CENTRAL TEXAS AND THE HILL COUNTRY THIS MONDAY MORNING. ADDITIONAL STATEMENTS WILL BE ISSUED DURING THE MORNING AS CONDITIONS WARRENT.
Special weather statement, May 4, 4:21 AM CDT, 2 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 420 AM CDT MON MAY 4 1987 ...HEAVY THUNDERSTORMS INDICATED IN THE DEL RIO AREA... AT 410 AM CDT A LINE OF HEAVY THUNDERSTORMS WAS MOVING THROUGH THE DEL RIO...LAUGHLIN AFB AREA. WHILE THE MOST INTENSE AREA OF THUNDERSTORMS WAS NEAR THE GARDNER STATE PARK...A VERY HEAVY THUNDERSTORM WAS LOCATED JUST EAST OF DEL RIO NEAR LAUGHLIN AFB. AN INTENSE THUNDERSTORM WAS ALSO LOCATED NEAR BRACKETVLLE. THIS LINE OF THUNDERSTORMS WAS MOVING TO THE SOTHEAST AT 20 MPH. INDIVIDUAL STORMS WITHIN THIS LINE WAS MOVING EAST AT 20 MPH. BRIEF HEAVY RAIN...SMALL HAIL...STRONG GUSTY WINDS AND DANGEROUS LIGHTNING ARE POSSIBLE WITH THESE STORMS. GOLFBALL SIZE HAIL HAS BEEN REPORTED OUT OF THE THUNDERSTORMS ACROSS GONZALES COUNTY. BOATERS ON LAKE AMISTAD SHOULD REMAIN ALERT TO THIS STORM SITUATION AND BE PREPARED TO SEEK SAFE SHELTER IF NECESSARY.
Special weather statement, May 4, 4:59 AM CDT, 1 hour 22 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 455 AM CDT MON MAY 4 1987 AT 450 AM CDT WEATHER SERVICE RADAR INDICATED A VERY STRONG THUNDER STORM NEAR BLANCO.DANGEROUS LIGHTNING...HEAVY RAIN...SMALL HAIL AND STRONG WINDS WILL LIKELY ACCOMPANY THIS STORM AS IT MOVES THROUGH BLANCO AND TRAVIS COUNTIES. A BROKEN LINE OF THUNDERSTORMS CONTINUED ACROSS SOUTH CENTRAL TEXAS AND THE HILL COUNTRY EXTENDING FROM NORTH OF WACO TO 20 MILES WEST OF THE AUSTIN AIRPORT TO ACROSS THE HIIL COUNTRY TO BRACKETTVILLE IN KINNEY COUNTY. THE NORTHERN PART OF THIS LINE MOVING EASTSOUTHEAST AT 20 MPH. THE SOUTHERN PORTION OF THE LINE BECOMING MORE STATIONARY. STAY TUNED TO NOAA WEATHER RADIO...LOCAL RADIO AND T.V. FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 4, 6:11 AM CDT, 10 minutes before
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</html>The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 10:12 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 63 min |
| May 3, 10:37 PM CDT | Severe Thunderstorm Warning | EWX | Williamson | 68 min |
| May 3, 11:10 PM CDT | Severe Thunderstorm Warning | EWX | Caldwell | 65 min |
| May 3, 11:44 PM CDT | Tornado Warning | EWX | Caldwell | 61 min |
| May 4, 12:09 AM CDT | Tornado Warning | EWX | Gonzales | 66 min |
| May 4, 12:56 AM CDT | Severe Thunderstorm Warning | EWX | Lavaca | 64 min |
| May 4, 1:39 AM CDT | Severe Thunderstorm Warning | EWX | Edwards | 66 min |
| May 4, 2:47 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Edwards, Kerr, Real, Uvalde | 58 min |
| May 4, 2:47 AM CDT | Severe Thunderstorm Warning | EWX | Kinney | 58 min |
| May 4, 3:47 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Medina, Uvalde | 58 min |
| May 4, 3:47 AM CDT | Severe Thunderstorm Warning | EWX | Kendall, Kerr | 58 min |
| May 4, 4:39 AM CDT | Severe Thunderstorm Warning | EWX | Bandera, Medina | 66 min |
| May 4, 5:59 AM CDT | Severe Thunderstorm Warning | EWX | Bexar | 61 min |
| May 4, 6:39 AM CDT | Severe Thunderstorm Warning | EWX | Maverick | 66 min |
| May 4, 7:37 AM CDT | Severe Thunderstorm Warning | EWX | Zavala | 68 min |
| May 4, 10:17 AM CDT | Severe Thunderstorm Warning | EWX | Dimmit | 73 min |
| May 4, 11:49 AM CDT | Severe Thunderstorm Warning | EWX | Webb | 56 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.