Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 834

May 15, 20095 counties in New Mexico; 18 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 15, 2009, 1:18 PM MDT for 5 counties in New Mexico; 18 counties in Texas. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: May 15, 2009, 1:18 PM MDT (19:18 UTC)
Expired: May 15, 2009, 2:15 PM MDT
In force: 57 min
Issued by: the Storm Prediction Center

All 23 counties

Chaves County, NM, Eddy County, NM, Lea County, NM, Lincoln County, NM, Roosevelt County, NM, Andrews County, TX, Bailey County, TX, Cochran County, TX, Crane County, TX, Culberson County, TX, Ector County, TX, Gaines County, TX, Hockley County, TX, Lamb County, TX, Loving County, TX, Midland County, TX, Pecos County, TX, Reeves County, TX, Terry County, TX, Upton County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX

The radar

The Midland/Odessa radar (KMAF), 122 km from the middle of the area, began a volume at 19:19 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 12:00Z, 7.3 hours before the alert went out and 121 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: 576 J/kg
Mixed-layer CIN: -474 J/kg
Mixed-layer LCL: 1929 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 188 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 14, 6:44 PM MDT	Mesoscale Discussion	SPC	Borden, Callahan, Coke, Cottle, Crosby, Dawson and 22 more	91 min
May 15, 1:44 PM MDT	Mesoscale Discussion	SPC	Hemphill, Lipscomb	31 min
May 15, 2:02 PM MDT	Tornado Watch	SPC	Collingsworth, Donley, Gray, Hemphill, Lipscomb, Ochiltree and 2 more	7 hr
May 15, 4:52 PM MDT	Mesoscale Discussion	SPC	Childress, Collingsworth, Donley, Gray, Hall, Hemphill and 1 more	53 min

Nearby

Mesoscale Discussions in Texas, 2009 Mesoscale Discussions in New Mexico, 2009 Every mesoscale discussion in 2009

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.