Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 326

April 10, 200420 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2004, 10:52 PM CDT for 20 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 10, 2004, 10:52 PM CDT (03:52 UTC)
Expired: Apr 11, 2004, 1:15 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Atascosa County, TX, Bee County, TX, Bexar County, TX, DeWitt County, TX, Dimmit County, TX, Duval County, TX, Frio County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Karnes County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Medina County, TX, Uvalde County, TX, Victoria County, TX, Webb County, TX, Wilson County, TX, Zavala County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 3.9 hours before the alert went out and 154 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2170 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 4.4

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.

Issued	Product	Office	Counties	Lasted
Apr 10, 7:19 PM CDT	Mesoscale Discussion	SPC	San Augustine	86 min
Apr 10, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty and 2 more	3 hr
Apr 10, 9:20 PM CDT	Mesoscale Discussion	SPC	Brooks, Cameron, Hidalgo, Kenedy, Starr, Willacy	85 min
Apr 10, 9:35 PM CDT	Severe Thunderstorm Watch	SPC	Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more	5 hr
Apr 11, 1:39 AM CDT	Mesoscale Discussion	SPC	Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more	66 min
Apr 11, 10:14 AM CDT	Mesoscale Discussion	SPC	Austin, Bee, Brazoria, Calhoun, Chambers, Colorado and 23 more	4 hr
Apr 11, 1:45 PM CDT	Mesoscale Discussion	SPC	Jefferson, Orange	3 hr

Nearby

Mesoscale Discussions in Texas, 2004 Every 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.