Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 1001

May 31, 20125 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 31, 2012, 6:21 PM CDT for 5 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 31, 2012, 6:21 PM CDT (23:21 UTC)
Expired: May 31, 2012, 8:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Brewster County, TX, Jeff Davis County, TX, Pecos County, TX, Presidio County, TX, Reeves County, TX

The radar

The Midland/Odessa radar (KMAF), 231 km from the middle of the area, began a volume at 23:21 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, 11.4 hours before the alert went out and 231 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: 527 J/kg
Mixed-layer CIN: -416 J/kg
Mixed-layer LCL: 2739 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 39 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 30, 7:37 PM CDT	Mesoscale Discussion	SPC	Blanco, Brown, Burnet, Callahan, Coleman, Comanche and 22 more	113 min
May 30, 8:38 PM CDT	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Childress, Collingsworth, Cottle and 13 more	97 min
May 30, 10:15 PM CDT	Mesoscale Discussion	SPC	Blanco, Brown, Burnet, Callahan, Coleman, Comanche and 22 more	2 hr
May 31, 6:02 AM CDT	Mesoscale Discussion	SPC	Brazos, Falls, Freestone, Houston, Leon, Limestone and 5 more	88 min
May 31, 9:47 AM CDT	Mesoscale Discussion	SPC	Chambers, Hardin, Harris, Jasper, Jefferson, Liberty and 5 more	58 min
May 31, 10:41 AM CDT	Severe Thunderstorm Watch	SPC	Hardin, Jasper, Jefferson, Newton, Orange	6 hr

Nearby

Mesoscale Discussions in Texas, 2012 Every mesoscale discussion in 2012

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.