Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 47, NWS Austin/San Antonio, TX

April 28, 2003Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 28, 2003, 12:10 AM CDT for Val Verde County, Texas. It was in force for 50 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 28, 2003, 12:10 AM CDT (05:10 UTC)
Expired
Apr 28, 2003, 1:00 AM CDT
In force
50 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 nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 5.2 hours before the alert went out and 89 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 2003-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 55 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 2003-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
55 J/kg
Mixed-layer CIN
-326 J/kg
Mixed-layer LCL
2935 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
82 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.

431 
WUUS54 KEWX 280510
SVRSAT
TXC465-280600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1207 AM CDT MON APR 28 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 100 AM CDT

* AT 1207 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER VAL VERDE COUNTY...OR ABOUT 58 MILES   
NORTHWEST OF DEL RIO...MOVING EAST NORTHEAST AT 25 MPH.

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE 
THUNDERSTORM OVER WESTERN VAL VERDE COUNTY CAPABLE OF PRODUCING 
STRONG DAMAGING WINDS IN EXCESS OF 60 MPH...POSSIBLE LARGE HAIL AND 
FREQUENT LIGHTNING.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY
FROM WINDOWS UNTIL THE STORM HAS PASSED.


LAT...LON 3027 10175 2981 10173 2962 10072 3027 10074

$$

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 27, 11:23 PM CDT, 47 minutes earlier.

Area forecast discussion, Apr 27, 11:23 PM CDT, 47 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1123 PM CDT SUN APR 27 2003

THUNDERSTORMS CONTINUE TO REGENERATE NEAR THE CONFLUENCE OF THE
PECOS AND RIO GRANDE AS A MID LEVEL MESO-LOW SPINS INTO CROCKETT
COUNTY JUST TO THE NORTH. WILL UPDATE TO INCREASE POPS OVER VAL
VERDE, KINNEY, AND EDWARDS COUNTIES. A FEW STORMS MAY BE PRODUCING
SOME GUSTY WINDS DUE TO THE INVERTED-V SIGNATURE FROM THE DRT
SOUNDING. STORM STRENGTH IS AT ITS STRONGEST SO FAR THIS EVENING,
BUT AN INHIBITING FACTOR IS CONTINUED COOLING OF LOW LEVEL
TEMPERATURES. THUS WILL NOT MENTION SEVERE.

.EWX...NONE
18/8/23

.PREVIOUS DISCUSSION............................................
SHORTWAVE OVER THE TRANS-PECOS REGION APPEARS TO BE SIGNIFICANT
ENOUGH TO POOL MOISTURE AND BREAK DOWN CAPPING OVER WESTERN SECTIONS
OF SOUTH CENTRAL TEXAS THIS EVENING. 00Z DRT SOUNDING INDICATES THE
AIR AHEAD OF THE UNSTABLE REGION AND STILL SHOWS ABOVE NORMAL
MOISTURE, MOST OF WHICH COMING FROM THE UPPER LEVELS. WIND PROFILES
AND FORECASTS INDICATE THIS AREA OF INSTABILITY IS IN NO HURRY TO
ARRIVE AT THE AUS/SAT AREAS, SO WILL KEEP POPS OUT FOR TONIGHT.
HOWEVER, MORNING WORDING FOR TOMORROW WILL BE CHANGED AS THE SHEAR
AXIS WILL TEAM UP WITH OVERNIGHT LOW LEVEL WIND MAXIMA TO POOL
MOSTURE OVER THE ESCARPMENT AREA BY DAYBREAK MONDAY. THUS WILL
MAINTAIN LOW POPS DUE MAINLY TO LIGHT AMOUNTS EXPECTED AND
ACCELERATE TIMING OF THE CHANCE OF RAIN. WILL ALSO NUDGE MINS UP A
CATEGORY AS THE CONVEYOR BELT SHOULD ALLOW DEWPOINTS TO CLIMB
OVERNIGHT. FINAL CHANGE WILL BE TO MAKE A SLIGHT ADJUSTMENT TO
TUESDAYS HIGHS WHICH IS IN SLIGHT CONFLICT WITH IFPS DATA. THE
REMAINDER OF THE FORECAST APPEARS ON TRACK.
Hazardous weather outlook, Apr 27, 6:00 AM CDT, 18 hours 10 minutes before
TXZ171>173-183>194-202>209-217>225-228-281100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
600 AM CDT SUN APR 27 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY
SCATTERED THUNDERSTORMS HILL COUNTRY AND SOUTH CENTRAL TEXAS THROUGH
NOON SHOULD REMAIN BELOW SEVERE LEVELS.  NO HAZARDOUS WEATHER IS
EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...
THUNDERSTORMS ALONG THE DRY LINE WILL AFFECT WESTERN COUNTIES ON
TUESDAY.  ISOLATED STORMS MAY APPROACH SEVERE LEVELS.  THUNDERSTORMS
WILL MOVE ACROSS SOUTH CENTRAL TEXAS AHEAD OF A COLD FRONT ON
THURSDAY.  STRONG CONVECTION IS POSSIBLE WITH THIS SYSTEM.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED.

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.