Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 1140

July 5, 201612 counties in Oklahoma; 21 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2016, 5:19 AM CDT for 12 counties in Oklahoma; 21 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 5, 2016, 5:19 AM CDT (10:19 UTC)
Expired: Jul 5, 2016, 7:45 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 33 counties

Beckham County, OK, Caddo County, OK, Comanche County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Kiowa County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Erath County, TX, Foard County, TX, Hardeman County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Knox County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 98 km from the middle of the area, began a volume at 10:20 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 00:00Z, 10.3 hours before the alert went out and 148 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: 2633 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1343 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 18.1

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
Jul 4, 11:14 PM CDT	Mesoscale Discussion	SPC	Harmon	2 hr
Jul 4, 11:45 PM CDT	Mesoscale Discussion	SPC	Bosque, Comanche, Erath, Hood, Johnson, Somervell and 1 more	90 min
Jul 5, 3:08 PM CDT	Mesoscale Discussion	SPC	Andrews, Borden, Coke, Crosby, Dawson, Ector and 16 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2016 Mesoscale Discussions in Oklahoma, 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.