Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 581

April 17, 20058 counties in New Mexico; 13 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2005, 8:40 PM MDT for 8 counties in New Mexico; 13 counties in Texas. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Apr 17, 2005, 8:40 PM MDT (02:40 UTC)
Expired: Apr 17, 2005, 10:15 PM MDT
In force: 95 min
Issued by: the Storm Prediction Center

All 21 counties

Chaves County, NM, Curry County, NM, De Baca County, NM, Eddy County, NM, Guadalupe County, NM, Lea County, NM, Lincoln County, NM, Roosevelt County, NM, Andrews County, TX, Bailey County, TX, Cochran County, TX, Culberson County, TX, Deaf Smith County, TX, Gaines County, TX, Hudspeth County, TX, Loving County, TX, Parmer County, TX, Reeves County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX

The radar

The Midland/Odessa radar (KMAF), 163 km from the middle of the area, began a volume at 02:40 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 nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 2.7 hours before the alert went out and 162 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: 477 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 1313 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 17, 8:18 PM MDT	Mesoscale Discussion	SPC	Harding, Quay, Union	87 min
Apr 18, 1:09 PM MDT	Mesoscale Discussion	SPC	Curry, Eddy, Lea, Roosevelt	2 hr
Apr 18, 4:55 PM MDT	Mesoscale Discussion	SPC	Lea	2 hr
Apr 18, 2:10 PM MDT	Severe Thunderstorm Watch	SPC	Armstrong, Bailey, Briscoe, Carson, Castro, Deaf Smith and 17 more	7 hr
Apr 18, 5:43 PM MDT	Mesoscale Discussion	SPC	Childress, Collingsworth, Cottle, Dickens, Foard, Garza and 8 more	62 min

Nearby

Mesoscale Discussions in Texas, 2005 Mesoscale Discussions in New Mexico, 2005 Every mesoscale discussion in 2005

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.