Alert archive / Texas / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 69, NWS Austin/San Antonio, TX

July 15, 1990Webb County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jul 15, 1990, 10:30 PM CDT for Webb County, Texas. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jul 15, 1990, 10:30 PM CDT (03:30 UTC)
Expired
Jul 15, 1990, 11:30 PM CDT
In force
60 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Webb 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

Corpus Christi, TX (KCRP), launched 00:00Z, 3.5 hours before the alert went out and 196 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, Corpus Christi, TX at 00:00Z on 1990-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1774 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, Corpus Christi, TX at 00:00Z on 1990-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
1774 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
784 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
266 m²/s²
Significant tornado parameter
2.5
Supercell composite
15.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 160330
SVRSAT
TXC479-160430-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1030 PM CDT SUN JUL 15 1990
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1130 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...WEBB
 
A SEVERE THUNDERSTORM WAS LOCATED OVER CENTRAL WEBB COUNTY MOVING
SLOWLY TO THE SOUTH AT LESS THAN 10 MILES AN HOUR. THIS STORM HAS
PRODUCED LARGE HAIL AS IT MOVED OUT OF LA SALLE COUNTY.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...HAIL
3/4 INCH OR MORE IN DIAMETER...FREQUENT LIGHTNING AND VERY HEAVY
RAIN.
 
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, Jul 15, 4:56 PM CDT, 5 hours 34 minutes before
TXZ034>036-038>039-054-152300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO, TX
455 PM CDT SUN JUL 15 1990

...SHOWERS AND THUNDERSTORMS CONTINUE ACROSS THE HILL COUNTRY...EDWARDS
PLATEAU AND SOUTH CENTRAL TEXAS...

A BROAD AREA OF SHOWERS AND A FEW THUNDERSTORMS STRETCHED ACROSS THE HILL
COUNTRY...EDWARDS PLATEAU AND ADJACENT SECTIONS OF SOUTH CENTRAL TEXAS
THIS AFTERNOON.  THE BENEFICIAL RAINFALL...MUCH OF WHICH HAS FALLEN OVER
THE EDWARDS AQUIFER RECHARGE ZONE...HAS GENERALLY BEEN LESS THAN AN INCH.
SAN MARCOS...JUST SOUTH OF AUSTIN...REPORTED NEAR TWO INCHES.  WITH THE
RAINS EXPECTED TO CONTINUE THROUGHOUT TONIGHT...OTHER LOCATIONS COULD SEE
TOTALS WELL IN EXCESS OF AN INCH BY MORNING.

AN ISOLATED REPORT OF SEVERE WEATHER JUST SOUTH OF KERRVILLE WAS RECEIVED
EARLIER THIS AFTERNOON.  A TORNADO APPARENTLY TOUCHED DOWN CAUSING
SUBSTANTIAL DAMAGE TO A MOBILE HOME PARK AND NEARBY RESIDENTIAL AREA.  AS
OF YET...NO REPORTS OF INJURIES HAVE BEEN RECEIVED.

THE RAINS ARE BEING TRIGGERED BY AN UNSEASONABLY STRONG UPPER AIR
DISTURBANCE THAT IS INTERACTING WITH A STATIONARY FRONT LYING EAST-TO-
WEST ACROSS THE AREA.  THE FRONT IS EXPECTED TO WEAKEN...BUT SHOULD
REMAIN THE FOCUS FOR SHOWER AND THUNDERSTORMS DEVELOPMENT THROUGHOUT
TONIGHT AND INTO MONDAY.
Special weather statement, Jul 15, 6:32 PM CDT, 3 hours 58 minutes before
TXZ039-160100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO, TX
630 PM CDT SUN JUL 15 1990

NATIONAL WEATHER SERVICE RADAR INDICATED A STRONG THUNDERSTORM OVER
SOUTHWEST BEXAR COUNTY MOVING TO THE NORTHEAST AT 15 MILES AN HOUR.  IF
THIS PRESENT MOVEMENT CONTINUES...THE STORM WILL MOVE ACROSS THE
SAN ANTONIO METROPOLITAN AREA WITHIN THE NEXT HALF HOUR.

ALONG WITH HEAVY RAIN...RESIDENTS CAN EXPECT FREQUENT LIGHTNING...STRONG
GUSTY WIND AND SOME SMALL HAIL AS THE STORM MOVES ACROSS THE CITY.  WITH
THE RAINS THROUGHOUT TODAY...ADDITIONAL HEAVY RAINFALL FROM THIS STORM
MAY BE QUICK TO PRODUCE MINOR FLOODING OF STREETS AND LOW-WATER CROSSINGS.

STAY TUNED TO LOCAL RADIO...TELE,VISION OR NOAA WEATHER RADIO FOR
ADDITIONAL UPDATES.
Special weather statement, Jul 15, 7:02 PM CDT, 3 hours 28 minutes before
TXZ039-160100-

URBAN FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO, TX
700 PM CDT SUN JUL 15 1990

FLOODING OF STREETS AND LOW-WATER CROSSINGS WAS LIKELY OCCURRING THIS
EVENING IN AND AROUND THE SAN ANTONIO METROPOLITAN AREA AS HEAVY RAINS
CONTINUED TO FALL.  STRONG THUNDERSTORMS WERE INDICATED BY RADAR MOVING
NORTHEAST ACROSS THE CITY AND PRODUCING RAINFALL ON THE ORDER OF THREE
TO FOUR INCHES PER HOUR.

MOTORISTS SHOULD EXERCISE CAUTION WHEN TRAVELING ON CITY STREETS AND
ROADWAYS.  DO NOT ATTEMPT TO DRIVE ACROSS LOW-WATER CROSSINGS OR ROADS
INUNDATED BY WATER OF UNKNOWN DEPTH.  RESIDENTS LIVING NEAR SMALL STREAMS
SHOULD CONTINUE TO MONITOR WEATHER CONDITIONS CLOSELY AND BE PREPAREDn TO
MOVE TO A PLACE OF SAFETY SHOULD RAPID RISES IN STREAM LEVELS OCCUR.

STAY TUNED TO NOAA WEATHER RADIO FOR ADDITIONAL UPDATES.
Special weather statement, Jul 15, 8:23 PM CDT, 2 hours 7 minutes before
TXZ030-034>037-160200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
817 PM CDT SUN JUL 15 1990

...HEAVY RAIN ACCUMULATIONS SOUTH OF AUSTIN...

EARLY TONIGHT...WIDESPREAD MOSTLY LIGHT TO MODERATE RAINS COVERED A
LARGE PORTION OF CENTRAL AND SOUTH CENTRAL TEXAS.  MOST RAINFALL A-
MOUNTS HAVE BEEN IN THE ONE TO TWO INCH CATEGORY...ALTHOUGH MANY SPOTS
TO THE SOUTH AND SOUTHWEST OF AUSTIN HAVE RECORDED AROUND 3 INCHES.
SO FAR THE HIGHEST AMOUNT CAME IN FROM LOCKHART WHERE 4.26 INCHES
HAD FALLEN UP TO 8 PM.

MOST OF THE HEAVIER SHOWERS REMAIN IN AND AROUND SAN ANTONIO...WITH
LITTLE OR NO MOVEMENT.

JVD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 8:15 PM CDTSevere Thunderstorm WarningEWXLa Salle45 min
Jul 15, 9:20 PM CDTFlash Flood WarningEWXAtascosa, Bexar115 min
Jul 15, 9:35 PM CDTSevere Thunderstorm WarningEWXWebb55 min
Jul 15, 11:59 PM CDTSevere Thunderstorm WarningEWXDimmit61 min
Jul 16, 2:03 AM CDTFlash Flood WarningEWXAtascosa, Bexar, Medina, Uvalde3 hr
Jul 16, 4:50 AM CDTFlash Flood WarningEWXAtascosa, Bexar, Medina4 hr
Jul 16, 8:42 AM CDTFlash Flood WarningEWXDimmit3 hr
Jul 16, 9:09 AM CDTFlash Flood WarningEWXAtascosa, Bexar3 hr
Jul 16, 11:30 AM CDTFlash Flood WarningEWXZavala3 hr
Jul 16, 11:44 AM CDTFlash Flood WarningEWXDimmit3 hr
Jul 16, 12:12 PM CDTFlash Flood WarningEWXAtascosa4 hr
Jul 16, 4:17 PM CDTFlash Flood WarningEWXAtascosa, Bexar, Wilson3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 1990Every severe thunderstorm warning in 1990

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.