Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 255

April 2, 200429 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2004, 7:26 PM CST for 29 counties in Texas. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Apr 2, 2004, 7:26 PM CST (01:26 UTC)
Expired: Apr 2, 2004, 8:30 PM CST
In force: 64 min
Issued by: the Storm Prediction Center

All 29 counties

Bandera County, TX, Concho County, TX, Dimmit County, TX, Duval County, TX, Edwards County, TX, Frio County, TX, Gillespie County, TX, Hidalgo County, TX, Irion County, TX, Jim Hogg County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, La Salle County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, McMullen County, TX, Medina County, TX, Menard County, TX, Real County, TX, Schleicher County, TX, Starr County, TX, Sutton County, TX, Tom Green County, TX, Uvalde County, TX, Webb County, TX, Zapata County, TX, Zavala County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 1.4 hours before the alert went out and 217 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: 927 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 762 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: -152 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: -0.7
Supercell composite: -7.0

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.

Issued	Product	Office	Counties	Lasted
Apr 3, 1:49 PM CST	Mesoscale Discussion	SPC	Brewster, Culberson, Hudspeth, Jeff Davis, Presidio	2 hr
Apr 3, 4:54 PM CST	Mesoscale Discussion	SPC	Andrews, Crane, Crockett, Ector, Gaines, Glasscock and 10 more	96 min
Apr 3, 5:42 PM CST	Mesoscale Discussion	SPC	Gaines, Loving, Reeves, Winkler, Yoakum	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.