Alert archive / Texas / Mesoscale Discussions in 2011

Mesoscale Discussion 1042

May 31, 2011Eddy County, Lea County, New Mexico; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 31, 2011, 2:31 PM MDT for Eddy County, Lea County, New Mexico; 14 counties in Texas. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: May 31, 2011, 2:31 PM MDT (20:31 UTC)
Expired: May 31, 2011, 4:30 PM MDT
In force: 119 min
Issued by: the Storm Prediction Center

Counties Eddy County, NM, Lea County, NM, Cochran County, TX, Crosby County, TX, Culberson County, TX, Gaines County, TX, Hale County, TX, Hockley County, TX, Jeff Davis County, TX, Lamb County, TX, Loving County, TX, Lubbock County, TX, Lynn County, TX, Reeves County, TX, Terry County, TX, Yoakum County, TX

The radar

The Midland/Odessa radar (KMAF), 96 km from the middle of the area, began a volume at 20:28 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 409May 31, 4:10 PM MDT

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 8.5 hours before the alert went out and 95 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: 2699 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 940 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.2

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 31, 4:05 PM MDT	Severe Thunderstorm Watch	SPC	Chaves, Eddy, Lea, Roosevelt	6 hr
May 30, 10:39 PM MDT	Mesoscale Discussion	SPC	Childress, Collingsworth, Cottle, Crosby, Dickens, Donley and 8 more	96 min

Nearby

Mesoscale Discussions in Texas, 2011 Mesoscale Discussions in New Mexico, 2011 Every mesoscale discussion in 2011

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.