Alert archive / Texas / Mesoscale Discussions in 2011

Mesoscale Discussion 2290

November 7, 201115 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Nov 7, 2011, 2:41 PM CST for 15 counties in Texas. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Nov 7, 2011, 2:41 PM CST (20:41 UTC)
Expired: Nov 7, 2011, 4:15 PM CST
In force: 94 min
Issued by: the Storm Prediction Center

Counties Callahan County, TX, Coke County, TX, Coleman County, TX, Eastland County, TX, Fisher County, TX, Haskell County, TX, Jones County, TX, Nolan County, TX, Runnels County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 46 km from the middle of the area, began a volume at 20:44 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

Fort Worth, TX (KFWD), launched 12:00Z, 8.7 hours before the alert went out and 232 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: 1281 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 236 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 5.9

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
Nov 6, 7:00 PM CST	Mesoscale Discussion	SPC	Cooke, Jack, Montague, Palo Pinto, Stephens, Wise and 1 more	90 min
Nov 7, 7:52 AM CST	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Childress, Collingsworth, Cottle and 14 more	83 min
Nov 7, 12:27 PM CST	Mesoscale Discussion	SPC	Baylor, Childress, Collingsworth, Cottle, Dickens, Floyd and 11 more	93 min
Nov 7, 1:11 PM CST	Tornado Watch	SPC	Archer, Baylor, Childress, Collingsworth, Cottle, Dickens and 11 more	8 hr
Nov 7, 5:04 PM CST	Mesoscale Discussion	SPC	Armstrong, Carson, Castro, Deaf Smith, Gray, Hutchinson and 3 more	56 min
Nov 7, 5:51 PM CST	Mesoscale Discussion	SPC	Archer, Baylor, Cottle, Foard, Hardeman, King and 3 more	114 min
Nov 7, 5:53 PM CST	Mesoscale Discussion	SPC	Cooke, Dallas, Denton, Grayson, Hood, Johnson and 4 more	67 min

Nearby

Mesoscale Discussions in Texas, 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.