Alert archive / Texas / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 79, NWS Austin/San Antonio, TX

May 19, 1987Bexar County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 19, 1987, 4:14 PM CDT for Bexar County, Texas. It was in force for 61 min.

The area

The counties it named.

The facts

Issued
May 19, 1987, 4:14 PM CDT (21:14 UTC)
Expired
May 19, 1987, 5:15 PM CDT
In force
61 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Bexar 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, 9.2 hours before the alert went out and 171 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, Victoria Regiona, TX at 12:00Z on 1987-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1597 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, Victoria Regiona, TX at 12:00Z on 1987-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
1597 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
594 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 192114
SVRSAT
TXC029-192215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
414 PM CDT TUE MAY 19 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL  515 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...BEXAR
 
AT 410 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM IN EAST BEXAR
COUNTY MOVING NORTH AT 30 MILES AN HOUR.  THE PUBLIC IN THE EAST
PART OF SAN ANTONIO AND BEXAR COUNTY HAS REPORTED HAIL AND HIGH
WINDS WITH THIS THUNDERSTORM.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...HAIL
3/4 INCH OR MORE IN DIAMETER...FREQUENT LIGHTNING AND VERY HEAVY
RAIN.
 
WHEN A THUNDERSTORM THREATENS...SEEK SHELTER INSIDE A HOME OR
BUILDING AWAY FROM DOORS AND WINDOWS.  REFRAIN FROM USING ELECTRICAL
APPLIANCES.
 
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO BTHE LOCAL NATIONAL WEATHER SERVICE OFFICE.
 
PLEASE LISTEN TO YOUR 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 19, 10:29 AM CDT, 5 hours 45 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1030 AM CDT TUE MAY 19 1987

A LARGE AREA OF LIGHT TO MODERATE RAIN AND A FEW THUNDERSTORMS CONTINUED
OVER SOUTH CENTRAL TEXAS AND THE HILL COUNTRY THIS MORNING.  ALL OF THIS
ACTIVITY WAS MOVING TO THE NORTH AT 35 MPH.  THE HEAVY THUNDERSTORMS
THAT MOVED THROUGH SAN ANTONIO EARLIER THIS MORNING HAVE MOVED INTO THE
TEXAS HILL COUNTRY.

ANOTHER LINE OF SHOWER AND THUNDERSTORMS HAS FORMED ALONG A DRY AREA
SOUTHWEST OF SAN ANTONIO.  THIS LINE WAS LOCATED FROM THE GARNER STATE
PARK AREA SOUTHEAST TO NEAR PLEASANTON AND SHOULD MOVE INTO BEXAR COUNTY
DURING THE NEXT HOUR OR SO.  OTHERWISE LIGHT TO MODERATE RAIN WILL
CONTINUE OFF AND ON THROUGHOUT THE MORNING.

MOST RAINFALL REPORTS SO FAR THIS MORNING WERE IN THE ONE HALF TO ONE
INCH CATEGORY WITH A FEW ISOLATED AREAS IN THE HILL COUNTRY REPORTING
2 TO 3 INCHES.  A FEW OF THE HEAVIER AMOUNTS WERE 3.00 INCHES AT
BANDERA...2.60 AT 6 MILES SOUTH OF CENTER POINT...1.95 PIPE CREEK...
1.77 AT MEDINA...AND 1.60 INCHES AT CENTER POINT.

THE AIR OVER SOUTH TEXAS WILL REMAIN UNSTABLE THROUGHOUT THE
AFTERNOON INTO THIS EVENING AND THE CHANCES OF RAIN WILL STAY HIGH FUNTIL
THE UPPER AIR DISTUBANCE OVER WEST TEXAS MOVES NORTHEASTWARD OUT OF
THE AREA.
Special weather statement, May 19, 1:25 PM CDT, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
128 PM CDT TUE MAY 19 1987

AT 125 PM CDT RADAR INDICATED THUNDERSTORMS 5 MILES WEST OF DEL RIO
MOVING SLOWLY TOWARD LAKE AMISTAD.

HEAVY RAIN...SMALL HAIL...STRONG GUSTY WINDS AND FREQUENT
DANGEROUS LIGHTNING ARE POSSIBLE WITH THESE STORMS.

BOATERS ON LAKE AMISTAD SHOULD KEEP A LOOKOUT AND BE PREPARED TO
SEEK SAFE HARBOR.
Special weather statement, May 19, 2:00 PM CDT, 2 hours 14 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
158 PM CDT TUE MAY 19 1987

...HAIL AND TORNADOES NORTHWEST AND NORTH OF AUSTIN...

AT 128 PM THE D.P.S. UNIT AT LAMPASAS RELAYED A REPORT OF A SMALL
TORNADO WHICH PASSED THROUGH THE EAST SIDE OF THE CITY OF SAN SABA.
SOME DAMAGE TO HOUSES AND TREES DOWN, BUT NO INJURIES REPORTED AT
THIS TIME.

AT 150 PM...MARBLE SIZE HAIL WAS REPORTED ON THE WEST AND NORTH
SIDE OF CEDAR PARK, MOVING RAPIDLY TOWARDS THE NORTH.  ALSO A BRIEF
HEAVY DOWNPOUR WITH THE HAIL.

JUST BEFORE 2 PM...THE WACO OFFICE ISSUED A TORNADO WARNING FOR THAT
CITY.

NEWLY DEVELOPING THUNDERSTORMS WERE LOCATED EAST OF SAN ANTONIO NEAR
SEGUIN AND LULING WERE ALSO MOVING NORTHWARD TOWARDS AUSTIN.
Special weather statement, May 19, 2:33 PM CDT, 1 hour 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
232 PM CDT TUE MAY 19 1987

...STRONG THUNDERSTORM WITH SMALL HAIL LOCATED JUST SOUTH OF SAN
MARCOS...

WIDELY SCATTERED BUT VERY SHORT-LIVED> INTENSE THUNDERSTORMS CONTINUE
TO RAPIDLY FORM AND MOVE NORTHWARD AT 20 MPH OVER CENTRAL TEXAS.  THE
HEAVIEST RAINS WERE NORTH OF GEORGETOWN...NEAR JARRELL AND ABOUT HALF
WAY BETWEEN SAN MARCOS AND SEGUIN.
Special weather statement, May 19, 3:17 PM CDT, 57 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
315 PM CDT TUE MAY 19 1987

AT 310 PM CDT A LINE OF THUNDERSTORMS  HAD DEVELOPED SOUTH OF
COMSTOCK AND EXTENDED TO THE NORTHERN VAL VERDE COUNTY LINE.
OTHER THUNDERSTORMS WERE IN NORTHEASTERN PART OF THE COUNTY. THE
LARGEST THUNDERSTORM WAS NEAR COMSTOCK. THE STORMS WERE MOVING
NORTHEAST AT 15 MILES AN HOUR.

HEAVY RAIN...SMALL HAIL...FREQUENT DANGEROUS LIGHTNING AND STRONG
GUSTY WIND|S ARE POSSIBLE WITH THE STORMS.
Special weather statement, May 19, 3:23 PM CDT, 51 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
320 PM CDT TUE MAY 19 1987

...STRONG THUNDERSTORMS WITH SMALL HAIL SCATTERED AROUND CENTRAL TEXAS...

NUMEROUS SMALL... BUT QUITE INTENSE THUNDERSTORMS CONTINUE TO
DEVELOP AND MOVE NORTHWARD AT 20 MPH OVER CENTRAL TEXAS.  THE
HEAVIEST RAINS WERE ALONG A 30 MILE WIDE BAND FROM CENTRAL BELL
COUNTY TO LAKE TRAVIS... NEW BRAUNFELS AND ON SOUTH OF SAN ANTONIO.

The office that day

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

IssuedProductOfficeCountiesLasted
May 18, 7:19 PM CDTSevere Thunderstorm WarningEWXMaverick56 min
May 18, 7:35 PM CDTSevere Thunderstorm WarningEWXVal Verde60 min
May 18, 9:13 PM CDTSevere Thunderstorm WarningEWXReal62 min
May 19, 10:58 AM CDTFlash Flood WarningEWXKendall2 hr
May 19, 3:15 PM CDTSevere Thunderstorm WarningEWXBexar60 min
May 19, 4:23 PM CDTSevere Thunderstorm WarningEWXHays, Travis67 min
May 19, 5:03 PM CDTTornado WarningEWXGuadalupe57 min
May 19, 6:06 PM CDTSevere Thunderstorm WarningEWXBexar, Wilson54 min
May 19, 6:29 PM CDTSevere Thunderstorm WarningEWXTravis61 min
May 19, 6:39 PM CDTTornado WarningEWXWilson66 min
May 19, 6:59 PM CDTSevere Thunderstorm WarningEWXBexar61 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.