Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 251

April 2, 20044 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2004, 12:34 PM CST for 4 counties in Texas. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Apr 2, 2004, 12:34 PM CST (18:34 UTC)
Expired: Apr 2, 2004, 2:00 PM CST
In force: 86 min
Issued by: the Storm Prediction Center

Counties Howard County, TX, Irion County, TX, Sterling County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 88 km from the middle of the area, began a volume at 18:37 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

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

Severe Thunderstorm Watch 40Apr 2, 2:25 PM CST

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 6.6 hours before the alert went out and 112 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: 73 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 1213 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -86 m²/s²
0-3 km storm-relative helicity: -33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 1, 6:52 PM CST	Mesoscale Discussion	SPC	Edwards, Kimble, Kinney, Menard, Real, Schleicher and 3 more	83 min
Apr 2, 10:59 AM CST	Mesoscale Discussion	SPC	Crockett, Edwards, Kinney, Maverick, Reagan, Real and 5 more	2 hr
Apr 2, 1:08 PM CST	Mesoscale Discussion	SPC	Culberson, Loving, Reeves	3 hr
Apr 2, 1:51 PM CST	Mesoscale Discussion	SPC	Dimmit, Edwards, Kinney, Maverick, Real, Sutton and 2 more	114 min
Apr 2, 2:25 PM CST	Severe Thunderstorm Watch	SPC	Bandera, Concho, Dimmit, Duval, Edwards, Frio and 19 more	6 hr
Apr 2, 5:10 PM CST	Mesoscale Discussion	SPC	Brooks, Cameron, Dimmit, Duval, Hidalgo, Jim Hogg and 8 more	95 min

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; radar from the NEXRAD Level II archive.