Alert archive / Texas / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 45, NWS Austin/San Antonio, TX

May 4, 1987Dimmit County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 4, 1987, 10:17 AM CDT for Dimmit County, Texas. It was in force for 73 min.

The area

The counties it named.

The facts

Issued
May 4, 1987, 10:17 AM CDT (15:17 UTC)
Expired
May 4, 1987, 11:30 AM CDT
In force
73 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Dimmit 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 12:00Z, 3.3 hours before the alert went out and 149 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.

Skew-T log-pSkew-T log-p diagram, Del Rio, TX at 12:00Z on 1987-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 1987-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2 J/kg
Mixed-layer CIN
-303 J/kg
Mixed-layer LCL
1459 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSAT 041517
SVRSAT
TXC127-041630-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1017 AM CDT MON MAY 4 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1130 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

TEXAS...DIMMIT

AT 1010 AM CDT A SEVERE THUNDERSTORM WAS 10 MILES SOUTH OF CARRIZO
SPRINGS MOVING TO THE EAST AT ABOUT 15 MPH.

FREQUENT LIGHTNING..STRONG DAMAGING WINDS AND LARGE HAIL WILL
LIKELY OCCUR IN THIS STORM.  IN ADDITION..LOCALLY HEAVY RAINFALL
AND FLOODING OFTEN ACCOMPANY SEVERE THUNDERSTORMS.

REMEMBER..SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO WARNING.

IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY.  YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY
TO RELAY YOUR SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER
SERVICE OFFICE.

PLEASE LISTEN TO YOUxR LOCAL RADIO..TV OR NOAA WEATHER RADIO STATION
FOR LATER STATEMENTS OR WARNINGS REGARDING THIS SEVERE WEATHER
EVENT.

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, 6:55 AM CDT, 3 hours 22 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
645 AM CDT MON MAY 4 1987

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 1100 AM CDT THIS MONDAY
MORNING FOR HAYS AND CALDWELL COUNTIES...

AT 640 AM CDT WEATHER SERVICE RADAR INDICATED MODERATE TO STRONG
THUNDERSTORMS OCCURRING ALONG A LINE  FROM AUSTIN TO SAN MARCOS
TO SAN ANTONIO. DANGEROUS LIGHTNING...BRIEF HEAVY RAIN...SMALL HAIL
AND STRONG WINDS WILL LIKELY ACCOMPANY THESE THUNDERSTORMS. OTHER
SHOWERS AND THUNDERSTORMS ARE INDICATED FROM NORTH OF WACO TO
TEMPLE TO AUSTIN...GENERALLY ALONG INTERSTATE 35.

THE LINE OF THUNDERSTORMS MOVING SOUTHEAST AT 20 MPH.

PERSONS IN AND NEAR THE WATCH AREA ARE URGED TO LISTERN FOR THE
L}ATEST INFORMATION AND POSSIBLE WARNINGS.
Special weather statement, May 4, 7:59 AM CDT, 2 hours 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
800 AM CDT MON MAY 4 1987

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 1100 AM CDT THIS MONDAY
MORNING FOR HAYS AND CALDWELL COUNTIES...

AT 750 AM CDT WEATHER SERVICE RADAR INDICATED MODERATE TO STRONG
THUNDERSTORMS OCCURRING BETWEEN DRIPPING SPRINGS AND SAN MARCOS AND
EAST OF AUSTIN FROM ELGIN TO BASTROP. AN AREA OF WIDESPREAD LIGHT RAIN
AND THUNDERSHOWERS WERE INDICATED FROM EAST WACO TO GEORGETOWN TO
AUSTIN TO SOUTH OF SAN ANTONIO. THIS AREA EXTENDS EASTWARD TO NEAR
HOUSTON. AT THIS TIME NO SEVERE WEATHER HAS BEEN REPORTED TO THIS
OFFICE.

MOVEMENT IS TO THE EAST 20 MPH.

PERSONS IN AND NEAR THE WATCH AREA ARE URGED TO LISTERN FOR THE
LATEST INFORMATION AND POSSIBLE WARNINGS.
Special weather statement, May 4, 8:10 AM CDT, 2 hours 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
800 AM CDT MON MAY 2 1987

...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MUCH OF SOUTH
CENTRAL TEXAS UNTIL 11 AM...

WHAT STARTED AS TWO INDIVIDUAL THUNDERSTORMS IN VAL VERDE AND EDWARDS
COUTIES BLOSSOMED INTO A SOLID LINE OF THUNDERSTORMS. SOME OF THESE
STORMS PRODUCED HAIL. MOST HAD BRIEF HEAVY DOWNPOURS WITH AMOUNTS UP
TO TWO INCHES IN A COUPLE OF HOURS. ONE THUNDERSTORM THAT PASSED OVER
THE SAN ANTONIO AIRPORT THIS MORNING GAVE A WIND GUST OF 55 MPH.

THE BAND OF SHOWERS AND THUNDERSTORMS EXTENDS FROM MAVERICK COUNTY ALONG
THE RIO GRANDE NORTHEAST TO BEYOND AUSTIN.THIS LINE HAS WEAKENED DURING
THE MORNING BUT ISOLATED INTENSE THUNDERSTORMS CONTINUE TO REDEVELOP
ALONG THE WESTERN END OF THIS LINE.

ALL OF THIS MUCH NEEDED RAIN IS ASSOCIATED WITH A TROUGH OF LOW PRESSURE
MOVING EAST THROUGH TEXAS. MORE RAIN AND THUNDERSTORMS CAN BE EXPECTED
THROUGH TUESDAY.

STAY TUNED TO YOUR NOAA WEATHER RADIO, LOCAL TV STATION FOR MORE
INFORMATION ON ANY WEATHER THAT CAN AFFECT YOU.
Special weather statement, May 4, 8:50 AM CDT, 1 hour 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
850 AM CDT MON MAY 2 1987

...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MUCH OF SOUTH CENTRAL
TEXAS UNTIL 11 AM...
...THE SEVERE THUNDERSTORM WARNING FOR ZAVALA COUNTY HAS EXPIRED...

STORMS THAT PRODUCED HAIL...DAMAGING WIND AND VERY HEAVY DOWNPOURS OVER
SOUTH CENTRAL TEXAS THIS MORNING CONTINUED AT 845 AM EAST OF A LINE FROM
AUSTIN TO FLORESVILLE...PEARSALL AND CRYSTAL CITY.  THE STORMS CONTINUED
TO MOVE TO THE SOUTHEAST AT 5 TO 10 MILES AN HOUR.

THE PUBLIC REPORTED MARBLE SIZED HAIL AND VERY HEAVY RAIN JUST EAST OF
FRIO TOWN IN NORTHERN FRIO COUNTY ABOUT 830 AM THIS MORNING.  ALTHOUGH
NO SEVERE WEATHER HAS BEEN REPORTED OR INDICATED BY RADAR OVER SOUYH
CENTRAL TEXAS IN THE PAST HOUR...THE STORM SYSTEM IS STILL VERY STRONG.
THE POTENTIAL EXISTS FOR ADDITIONAL HAIL OR DAMAGING WINDS IN THE MORE
INTENSE THUNDERSTORMS.  BRIEF PERIODS OF HEAVY RAIN ARE ALSO EXPECTED
WITH THE STORMS...AS WELL AS VERY FREQUENT AND DANGEROUS LIGHTNING.

THE RAIN IS ENDING AND CLOUDS ARE BEGINNING TO DISSIPATE OVER THE HILL
COUNTRY AT THIS TIME...INDICATING THE END TO THE THREAT OF SEVERE
WEATHER IS CLOSE FOR THE WESTERN PORTION OF THE WATCH AREA.
Special weather statement, May 4, 9:02 AM CDT, 1 hour 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
900 AM CDT MON MAY 4 1987

...SEVERE THUNDERSTORM WATCH NO LONGER IN EFFECT FOR HAYS AND
CALDWELL COUNTIES.

AT 855 AM CDT WEATHER SERVICE RADAR INDICATED AN AREA OF WIDESPREAD
LIGHT RAIN WITH EMBEBBED SHOWERS AND THUNDERSTORMS ACROSS PORTION OF
SOUTH CENTRAL AND SOUTH TEXAS GENERALLY EAST OF A LINE FROM CORSICANA
TO AUSTIN TO SAN ANTONIO TO CRYSTAL CITY IN ZAVALA COUNTY.
THE STRONGEST )THUNDERSTORM INDICATED NEAR BRENHAN IN WASHINGTON
COUNTY.  THIS STORM BE ACCOMPANIED BY STRONG DAMAGING WINDS...HAIL
AND FREQUENT LIGHTNING.

THE THUNDERSTORMS ARE MOVING EAST 20 MPH.
Special weather statement, May 4, 9:30 AM CDT, 47 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
930 AM CDT MON MAY 4 1987

...THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED ALONG AND NORTHWEST
OF A LINE FROM SEGUIN TO SAN ANTONIO TO HONDO...
...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR A PORTION OF SOUTH
CENTRAL TEXAS UNTIL 11 AM...

SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAINFALL...CONTINUED OVER
THE SOUTHEAST SECTION OF CENTRAL TEXAS AT 925 AM THIS MORNING.  ALTHOUGH
NO SEVERE WEATHER HAS BEEN REPORTED IN THE PAST HOUR...THE POTENTIAL FOR
HAIL...DAMAGING WIND AND HEAVY RAIN CONTINUES.  THE WATCH REMAINS IN
EFFECT SOUTHEAST OF A LINE FROM FROM GONZALES TO PEARSALL TO CARRIZO
SPRINGS.  IN ADDITION TO THE HEAVY RAIN...FREQUENT AND VERY DANGEROUS
LIGHTNING HAVE ALSO BEEN REPORTED IN THESE STORMS.

THE GREATER SAN ANTONIO METROPOLITAN AREA IS NO LONGER IN THE WATCH
AREA.

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 3, 10:12 PM CDTSevere Thunderstorm WarningEWXTravis63 min
May 3, 10:37 PM CDTSevere Thunderstorm WarningEWXWilliamson68 min
May 3, 11:10 PM CDTSevere Thunderstorm WarningEWXCaldwell65 min
May 3, 11:44 PM CDTTornado WarningEWXCaldwell61 min
May 4, 12:09 AM CDTTornado WarningEWXGonzales66 min
May 4, 12:56 AM CDTSevere Thunderstorm WarningEWXLavaca64 min
May 4, 1:39 AM CDTSevere Thunderstorm WarningEWXEdwards66 min
May 4, 2:47 AM CDTSevere Thunderstorm WarningEWXBandera, Edwards, Kerr, Real, Uvalde58 min
May 4, 2:47 AM CDTSevere Thunderstorm WarningEWXKinney58 min
May 4, 3:47 AM CDTSevere Thunderstorm WarningEWXBandera, Medina, Uvalde58 min
May 4, 3:47 AM CDTSevere Thunderstorm WarningEWXKendall, Kerr58 min
May 4, 4:39 AM CDTSevere Thunderstorm WarningEWXBandera, Medina66 min
May 4, 5:59 AM CDTSevere Thunderstorm WarningEWXBexar61 min
May 4, 6:21 AM CDTSevere Thunderstorm WarningEWXGuadalupe, Wilson69 min
May 4, 6:39 AM CDTSevere Thunderstorm WarningEWXMaverick66 min
May 4, 7:37 AM CDTSevere Thunderstorm WarningEWXZavala68 min
May 4, 11:49 AM CDTSevere Thunderstorm WarningEWXWebb56 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.