Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 300

April 8, 200428 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2004, 5:45 PM CDT for 28 counties in Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Apr 8, 2004, 5:45 PM CDT (22:45 UTC)
Expired: Apr 8, 2004, 7:15 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 28 counties

Bandera County, TX, Brooks County, TX, Crockett County, TX, Dimmit County, TX, Duval County, TX, Edwards County, TX, Frio County, TX, Irion County, TX, Jim Hogg County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, La Salle County, TX, Maverick County, TX, Medina County, TX, Pecos County, TX, Reagan County, TX, Real County, TX, Schleicher County, TX, Starr County, TX, Sutton County, TX, Terrell County, TX, Upton County, TX, Uvalde County, TX, Val Verde County, TX, Webb County, TX, Zapata County, TX, Zavala County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 10.8 hours before the alert went out and 329 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: 56 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 1105 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.9

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 7, 7:20 PM CDT	Severe Thunderstorm Watch	SPC	Jasper, Newton, Sabine	6 hr
Apr 7, 9:59 PM CDT	Mesoscale Discussion	SPC	Jasper, Newton	61 min
Apr 8, 1:31 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Castro, Cochran, Dawson, Deaf Smith and 14 more	119 min
Apr 8, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	Bailey, Castro, Cochran, Deaf Smith, Gaines, Hockley and 7 more	6 hr
Apr 8, 4:44 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Castro, Cochran, Deaf Smith, Gaines and 8 more	91 min
Apr 8, 6:15 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Briscoe, Carson, Collingsworth, Crosby, Dickens and 12 more	6 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.