Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 549

April 23, 200311 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2003, 7:00 PM CDT for 11 counties in Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Apr 23, 2003, 7:00 PM CDT (00:00 UTC)
Expired
Apr 23, 2003, 8:30 PM CDT
In force
90 min
Issued by
the Storm Prediction Center

Counties Crockett County, TX, Edwards County, TX, Kimble County, TX, Kinney County, TX, Mason County, TX, Menard County, TX, Real County, TX, Schleicher County, TX, Sutton County, TX, Uvalde County, TX, Val Verde County, TX

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 0.0 hours before the alert went out and 71 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 2003-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1984 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 2003-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 252 square meters per square second.1939587897117Sfc1 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
1984 J/kg
Mixed-layer CIN
-128 J/kg
Mixed-layer LCL
937 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
252 m²/s²
0-3 km storm-relative helicity
369 m²/s²
Significant tornado parameter
2.0
Supercell composite
11.0

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 23, 7:03 PM CDTMesoscale DiscussionSPCBosque, Collin, Comanche, Cooke, Coryell, Dallas and 25 more117 min
Apr 23, 7:45 PM CDTTornado WatchSPCBandera, Bexar, Blanco, Burnet, Caldwell, Comal and 11 more4 hr
Apr 23, 8:43 PM CDTMesoscale DiscussionSPCArcher, Baylor, Brown, Callahan, Clay, Coleman and 15 more77 min
Apr 23, 9:35 PM CDTSevere Thunderstorm WatchSPCCollin, Cooke, Dallas, Delta, Denton, Ellis and 20 more5 hr
Apr 23, 11:43 PM CDTMesoscale DiscussionSPCAnderson, Bowie, Camp, Cass, Cherokee, Delta and 23 more2 hr
Apr 24, 2:41 AM CDTMesoscale DiscussionSPCAnderson, Bell, Cass, Cherokee, Falls, Freestone and 12 more2 hr
Apr 24, 6:30 AM CDTSevere Thunderstorm WatchSPCAngelina, Hardin, Jasper, Newton, Sabine, San Augustine and 2 more5 hr
Apr 24, 6:40 AM CDTSevere Thunderstorm WatchSPCAngelina, Hardin, Jasper, Newton, Sabine, San Augustine and 2 more4 hr
Apr 24, 7:14 AM CDTMesoscale DiscussionSPCAustin, Bastrop, Brazoria, Brazos, Burleson, Caldwell and 22 more2 hr
Apr 24, 7:30 AM CDTTornado WatchSPCAngelina, Austin, Brazoria, Brazos, Burleson, Chambers and 17 more6 hr
Apr 24, 9:11 AM CDTMesoscale DiscussionSPCFort Bend, Harris, Liberty, Montgomery, Polk, San Jacinto2 hr
Apr 24, 11:40 AM CDTMesoscale DiscussionSPCSabine, San Augustine, Shelby65 min

Nearby

Mesoscale Discussions in Texas, 2003Every mesoscale discussion 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.