Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 782

May 20, 200410 counties in New Mexico; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 20, 2004, 5:53 PM MDT for 10 counties in New Mexico; 14 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 20, 2004, 5:53 PM MDT (23:53 UTC)
Expired: May 20, 2004, 8:00 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 24 counties

Chaves County, NM, Curry County, NM, De Baca County, NM, Eddy County, NM, Guadalupe County, NM, Harding County, NM, Lea County, NM, Quay County, NM, Roosevelt County, NM, Union County, NM, Andrews County, TX, Bailey County, TX, Cochran County, TX, Crane County, TX, Dallam County, TX, Ector County, TX, Gaines County, TX, Hartley County, TX, Loving County, TX, Parmer County, TX, Reeves County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 11.9 hours before the alert went out and 257 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: 585 J/kg
Mixed-layer CIN: -273 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 58 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
May 20, 12:46 PM MDT	Mesoscale Discussion	SPC	Chaves, Colfax, De Baca, Guadalupe, Harding, Lincoln and 2 more	89 min
May 20, 2:43 PM MDT	Mesoscale Discussion	SPC	Chaves, Eddy, Lea	92 min
May 20, 3:30 PM MDT	Severe Thunderstorm Watch	SPC	Chaves, De Baca, Eddy, Lea, Roosevelt	6 hr

Nearby

Mesoscale Discussions in Texas, 2004 Mesoscale Discussions in New Mexico, 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.