Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 21, NWS Corpus Christi, TX

April 20, 2003Aransas County, Calhoun County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at Apr 20, 2003, 1:49 PM CDT for Aransas County, Calhoun County, Texas. It was in force for 41 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 20, 2003, 1:49 PM CDT (18:49 UTC)
Expired
Apr 20, 2003, 2:30 PM CDT
In force
41 min
Issued by
NWS Corpus Christi, TX
Area
Counties, with a storm outline in the text

Counties Aransas County, TX, Calhoun County, TX

The radar

The Corpus Christi radar (KCRP), 85 km from the middle of the area, began a volume at 18:50 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 6.8 hours before the alert went out and 78 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 12:00Z on 2003-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1066 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 12:00Z on 2003-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.19395878Sfc1 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
1066 J/kg
Mixed-layer CIN
-117 J/kg
Mixed-layer LCL
583 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

387 
WUUS54 KCRP 201849
SVRCRP
TXC007-057-201930-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
145 PM CDT SUN APR 20 2003

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ARANSAS COUNTY  
  CALHOUN COUNTY 
   
* UNTIL 230 PM CDT

* AT 145 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
TWO SEVERE THUNDERSTORMS. ONE WAS MOVING INTO CALHOUN COUNTY 
NORTHEAST OF TIVOLI AND THE SECOND WAS 3 MILES NORTH OF LAMAR IN 
NORTHERN ARANSAS COUNTY. THE STORMS WERE MOVING NORTHEAST AT 25 
MPH.  

THESE SEVERE THUNDERSTORMS ARE CAPABLE OF PRODUCING...  

HAIL UP TO THE SIZE OF DIMES...
WIND GUSTS TO NEAR 60 MPH...

IF YOU ARE IN THE PATH OF THESE STORMS GO TO A PLACE OF SHELTER. 

LAT...LON 2813 9713 2835 9636 2861 9668 2826 9702

$$

PURPURA

The office that day

Everything else NWS Corpus Christi, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 20, 8:14 AM CDTSevere Thunderstorm WarningCRPWebb61 min
Apr 20, 10:46 AM CDTSevere Thunderstorm WarningCRPWebb44 min
Apr 20, 11:32 AM CDTSevere Thunderstorm WarningCRPWebb43 min
Apr 20, 12:57 PM CDTSevere Thunderstorm WarningCRPCalhoun, Refugio, Victoria48 min
Apr 20, 1:56 PM CDTSpecial Marine WarningCRP94 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; radar from the NEXRAD Level II archive.