Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 43, NWS Austin/San Antonio, TX

April 23, 2003Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 23, 2003, 5:18 PM CDT for Val Verde County, Texas. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 23, 2003, 5:18 PM CDT (22:18 UTC)
Expired
Apr 23, 2003, 5:45 PM CDT
In force
27 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Val Verde County, TX

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 23, 2:35 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 10.3 hours before the alert went out and 95 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 2003-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1151 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 2003-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 228 square meters per square second.1939587897Sfc1 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
1151 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
614 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
228 m²/s²
0-3 km storm-relative helicity
302 m²/s²
Significant tornado parameter
1.8
Supercell composite
11.1

Open this sounding in Storm Lab

The text

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

376 
WUUS54 KEWX 232218
SVRSAT
TXC465-232245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
518 PM CDT WED APR 23 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  VAL VERDE

* UNTIL 545 PM CDT

* AT 518 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER VAL VERDE COUNTY...OR ABOUT 27 MILES
  SOUTHWEST OF SONORA...MOVING EAST AT 25 MPH.

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.


LAT...LON 3029 10099 3017 10098 3009 10070 3029 10071

$$

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.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 3:00 PM CDT, 2 hours 18 minutes earlier.

Area forecast discussion, Apr 23, 3:00 PM CDT, 2 hours 18 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
ISSUED BY NWS CORPUS CHRISTI TX
300 PM CDT WED APR 23 2003

MAIN FORECAST PROBLEM THIS CYCLE WILL BE PRECIP CHANCES AND POSSBILE
SEVERE WEATHER TONIGHT.  SURFACE ANALYSIS AND MSAS SHOWS DRY LINE
FROM NEAR CDS-SJT-E OF FST LINE WITH STRONG TO SEVERE THUNDERSTORMS
OVER SJT CWA.  CAP HAS BEEN SLOW TO BREAK NEAR DRT AS LOW CLOUDS
HAVE HINDERED INSOLATION.  CLOUDS SHOULD BEGIN TO ERODE DURING THE
NEXT HOUR SO EXPECT THUNDERSTORM TO DEVELOP/MOVE INTO EWX COUNTY
WARNING AREA LATE THIS AFTERNOON. WILL HAVE HIGH-END CHANCE/LIKELY
CATEGORY NEAR CENTRAL AND EASTERN PARTS OF AREA AND WILL MENTION
SEVERE.  GFS IS NOT FORECASTING MUCH MID LEVEL COOLING SW OF
SAT...SO WILL ONLY GO WITH LOW-END CHANCE OF THUNDERSTORMS
TONIGHT.  RICH THTE IS PROGGED OVER EASTERN SECTIONS 12Z THU SO WILL
KEEP CHANCE OF SHOWERS AND STORMS THERE UNTIL H8 FRONT PASSES.

STRONG ADIABATIC WARMING BEHIND DRY LINE THU MAY LEAD TO HIGH FIRE
DANGER CONDITIONS ON THU.  WEATHER THROUGH WEEKEND SHOULD REMAIN
TRANQUIL.  ON MONDAY...LOW LEVEL TROUGHING IN WEST TEXAS IS PROGGED
TO INCREASE MOISTURE...ESPECIALLY ALONG THE RIO GRANDE.  ONGOING
EXTENDED FORECAST OF SLIGHT CHANCE OF SHOWERS EARLY NEXT WEEK LOOKS
FINE AND WILL NOT UPDATE AT THIS TIME.

PRELIM NUMBERS...

AUS BU 064/085 056/081 053 99630
DRT BU 062/090 056/088 055 99300
SAT BU 064/086 058/083 054 99520

.EWX...NONE.

AP
Hazardous weather outlook, Apr 23, 11:15 AM CDT, 6 hours 3 minutes before
TXZ171>173-183>194-202>209-217>225-228-241100-

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
ISSUED BY NWS CORPUS CHRISTI TX
1115 AM CDT WED APR 23 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE FAR
WESTERN HILL COUNTY LATE THIS AFTERNOON...AS THE DRYLINE INTERACTS
WITH A VERY MOIST AND UNSTABLE ATMOSPHERE. LARGE HAIL AND DAMAGING
WINDS ARE THE PRIMARY THREAT.

THE SLIGHT RISK FOR SEVERE THUNDERSTORMS WILL BE EXPANDED TO ALL OF
SOUTH CENTRAL TEXAS AND THE HILL COUNTRY TONIGHT AS AN UPPER LEVEL
TROUGH DRAGS A PACIFIC COLD FRONT THROUGH THE AREA. THESE FEATURES
WILL INTERACT WITH A MOIST AND UNSTABLE AIRMASS TO GENERATE
SCATTERED TO NUMEROUS THUNDERSTORMS. THE STRONGEST ATMOSPHERIC
DESTABILIZATION WILL BE TONIGHT AND CAUSE SOME STORMS TO BE SEVERE.
LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREAT...ALTHOUGH
ISOLATED TORNADOES ARE POSSIBLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SHOWERS AND THUNDERSTORMS WILL END FROM WEST TO EAST ON THURSDAY
AS THE FEATURES MOVE INTO EASTERN TEXAS.  THE NEXT CHANCE OF SHOWERS
AND THUNDERSTORMS WILL BE LATE MONDAY INTO TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED LATE THIS AFTERNOON AND TONIGHT.

JM

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 5:38 PM CDTSevere Thunderstorm WarningEWXEdwards37 min

Nearby

Severe Thunderstorm Warnings in Texas, 2003Every severe thunderstorm warning in 2003

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.