Alert archive / Texas / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 55, NWS Austin/San Antonio, TX

May 13, 1987Bandera County, Kerr County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 13, 1987, 10:20 PM CDT for Bandera County, Kerr County, Texas. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
May 13, 1987, 10:20 PM CDT (03:20 UTC)
Expired
May 13, 1987, 11:15 PM CDT
In force
55 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Bandera County, TX, Kerr 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, 3.3 hours before the alert went out and 160 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 00:00Z on 1987-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3087 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 00:00Z on 1987-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.1939Sfc1 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
3087 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
1367 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
65 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 140320
SVRSAT
TXC019-265-140415-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1020 PM CDT WED MAY 13 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 1115 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH TEXAS
          ...BANDERA...KERR
 
NATIONAL WEATHER SERVICE RADAR INDICATES VERY INTENSE THUNDERSTORMS
IN SOUTHERN BANDERA COUNTY...MOVING TO THE NORTH AT 10 MPH.  THE
SHERIFFS DEPARTMENT IN BANDERA REPORTED SPOTTY 1 INCH HAIL WITH MOST
HAIL PEA TO MARBLE SIZED HAIL IN THE CITY OF BANDERA.  HEAVY RAIN WAS
ALSO OCCURRING.
 
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 THE LOCAL NATIONAL WEATHER SERVICE OFFICE.

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, 8:17 PM CDT, 2 hours 3 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
816 PM CDT WED MAY 13 1987

...THUNDERSTORMS OBSERVED IN THE DEL RIO AREA...

AT 815 PM CDT THUNDERSTORMS WERE OBSERVED AT THE DEL RIO
INTERGNATIONAL AIRPORT. THESE STORMS WERE MOVING TO THE NORTHEAST
AT 10 TO 15 MPH.

HEAVY RAIN...SMALL HAIL...STRONG GUSTY WINDS AND FREQUENT
DANGEROUS LIGHTNING ARE POSSIBLE WITH THESE STORMS.
Special weather statement, May 13, 10:03 PM CDT, 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
1002 PM CDT WED MAY 13 1987

...THUNDERSTORMS OBSERVED IN THE DEL RIO AREA...

AT 1000 PM CDT THUNDERSTORMS WITH FREQUENT DANGEROUS LIGHTNINGe WERE
OBSERVED AT THE DEL RIO INTERNATIONAL AIRPORT. THESE STORMS WERE
MOVING TO THE NORTH AT 10 MPH.

HEAVY RAIN...SMALL HAIL...AND STRONG GUSTY WINDS ARE ALSO POSSIBLE
WITH THESE STORMS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 13, 7:26 PM CDTSevere Thunderstorm WarningEWXZavala64 min
May 13, 8:09 PM CDTSevere Thunderstorm WarningEWXBexar66 min
May 13, 9:28 PM CDTSevere Thunderstorm WarningEWXUvalde62 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.