Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 322

April 10, 200423 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2004, 6:09 PM CDT for 23 counties in Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Apr 10, 2004, 6:09 PM CDT (23:09 UTC)
Expired
Apr 10, 2004, 7:45 PM CDT
In force
96 min
Issued by
the Storm Prediction Center
All 23 counties

Atascosa County, TX, Austin County, TX, Bee County, TX, Brazoria County, TX, Colorado County, TX, DeWitt County, TX, Fort Bend County, TX, Goliad County, TX, Gonzales County, TX, Harris County, TX, Jackson County, TX, Karnes County, TX, La Salle County, TX, Lavaca County, TX, Liberty County, TX, Live Oak County, TX, McMullen County, TX, Montgomery County, TX, San Jacinto County, TX, Victoria County, TX, Waller County, TX, Webb County, TX, Wharton 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

Corpus Christi, TX (KCRP), launched 12:00Z, 11.2 hours before the alert went out and 137 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 2004-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1910 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 2004-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 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
1910 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
607 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
112 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.2

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 9, 7:02 PM CDTMesoscale DiscussionSPCDelta, Fannin, Grayson, Lamar, Red River58 min
Apr 9, 7:40 PM CDTSevere Thunderstorm WatchSPCDelta, Fannin, Lamar, Red River5 hr
Apr 9, 9:25 PM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Castro, Childress, Collingsworth and 16 more95 min
Apr 9, 10:06 PM CDTMesoscale DiscussionSPCDelta, Fannin, Lamar, Red River54 min
Apr 9, 11:57 PM CDTMesoscale DiscussionSPCBowie, Delta, Fannin, Lamar, Red River63 min
Apr 10, 5:57 AM CDTMesoscale DiscussionSPCLamar, Red River93 min
Apr 10, 9:08 AM CDTMesoscale DiscussionSPCBandera, Bell, Blanco, Bosque, Brown, Burnet and 21 more2 hr
Apr 10, 10:20 AM CDTSevere Thunderstorm WatchSPCBandera, Bastrop, Bell, Bexar, Blanco, Bosque and 33 more6 hr
Apr 10, 12:43 PM CDTMesoscale DiscussionSPCBandera, Bastrop, Bell, Bexar, Blanco, Burleson and 26 more2 hr
Apr 10, 2:50 PM CDTMesoscale DiscussionSPCAnderson, Bowie, Camp, Cass, Cherokee, Franklin and 10 more115 min
Apr 10, 2:50 PM CDTSevere Thunderstorm WatchSPCAtascosa, Austin, Bandera, Bastrop, Bee, Bexar and 52 more5 hr
Apr 10, 3:25 PM CDTSevere Thunderstorm WatchSPCAngelina, Bowie, Camp, Cass, Cherokee, Franklin and 14 more6 hr
Apr 10, 5:38 PM CDTMesoscale DiscussionSPCHardin, Jasper, Jefferson, Newton, Orange, Tyler2 hr
Apr 10, 6:30 PM CDTSevere Thunderstorm WatchSPCJasper, Jefferson, Newton, Orange5 hr

Nearby

Mesoscale Discussions in Texas, 2004Every mesoscale discussion in 2004

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.