Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 1170

June 15, 2012Comanche County, Cotton County, Oklahoma; 17 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 15, 2012, 1:40 AM CDT for Comanche County, Cotton County, Oklahoma; 17 counties in Texas. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Jun 15, 2012, 1:40 AM CDT (06:40 UTC)
Expired: Jun 15, 2012, 2:45 AM CDT
In force: 65 min
Issued by: the Storm Prediction Center

Counties Comanche County, OK, Cotton County, OK, Archer County, TX, Baylor County, TX, Callahan County, TX, Clay County, TX, Eastland County, TX, Fisher County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Nolan County, TX, Palo Pinto County, TX, Shackelford County, TX, Stephens County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Young County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 6.7 hours before the alert went out and 178 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: 1803 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 1935 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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
Jun 14, 8:12 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Cimarron, Ellis, Greer, Harmon and 5 more	93 min
Jun 14, 9:20 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Comanche, Cotton and 14 more	5 hr
Jun 14, 11:22 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Canadian, Dewey, Garfield, Grant and 11 more	53 min
Jun 15, 1:41 PM CDT	Mesoscale Discussion	SPC	McCurtain	64 min
Jun 15, 6:51 PM CDT	Mesoscale Discussion	SPC	Bailey, Borden, Briscoe, Castro, Cochran, Crosby and 15 more	84 min

Nearby

Mesoscale Discussions in Texas, 2012 Mesoscale Discussions in Oklahoma, 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.