Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 610

May 11, 201619 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 11, 2016, 7:11 PM CDT for 19 counties in Texas. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: May 11, 2016, 7:11 PM CDT (00:11 UTC)
Expired: May 11, 2016, 8:45 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center

Counties Callahan County, TX, Eastland County, TX, Erath County, TX, Fisher County, TX, Haskell County, TX, Hood County, TX, Jack County, TX, Jones County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 22 km from the middle of the area, began a volume at 00:12 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 173May 11, 10:55 PM CDT

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.2 hours before the alert went out and 204 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: 2369 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1270 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 11, 8:11 PM CDT	Mesoscale Discussion	SPC	Clay, Cooke, Grayson, Montague	3 hr
May 11, 9:52 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Comanche, Eastland, Erath and 15 more	53 min
May 11, 10:13 PM CDT	Mesoscale Discussion	SPC	Armstrong, Childress, Collingsworth, Donley, Gray, Hall and 4 more	92 min
May 11, 10:55 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Callahan, Coke, Coleman, Fisher, Jones and 4 more	6 hr
May 12, 2:12 AM CDT	Mesoscale Discussion	SPC	Clay, Montague, Wichita	93 min
May 12, 3:35 AM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Comanche, Eastland, Erath and 9 more	85 min

Nearby

Mesoscale Discussions in Texas, 2016 Every mesoscale discussion in 2016

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.