Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 673

May 16, 201519 counties in Oklahoma; 18 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 16, 2015, 7:14 PM CDT for 19 counties in Oklahoma; 18 counties in Texas. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: May 16, 2015, 7:14 PM CDT (00:14 UTC)
Expired: May 16, 2015, 8:45 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center

All 37 counties

Caddo County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Pontotoc County, OK, Pottawatomie County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Cooke County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Knox County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Shackelford County, TX, Stephens County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.2 hours before the alert went out and 150 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: 2428 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1267 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 143 m²/s²
0-3 km storm-relative helicity: 280 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 19.4

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 16, 7:30 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Creek, Delaware, Haskell and 16 more	90 min
May 16, 8:42 PM CDT	Tornado Watch	SPC	Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 27 more	8 hr
May 16, 8:47 PM CDT	Mesoscale Discussion	SPC	Canadian, Carter, Cleveland, Coal, Cotton, Garvin and 18 more	88 min
May 16, 11:34 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Cherokee, Coal, Craig and 23 more	86 min
May 16, 9:02 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coke, Coleman, Comanche, Concho and 29 more	58 min
May 16, 9:36 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Callahan, Coke, Coleman, Concho, Crockett and 15 more	6 hr
May 16, 10:40 PM CDT	Severe Thunderstorm Watch	SPC	Bosque, Collin, Comanche, Cooke, Dallas, Denton and 17 more	3 hr
May 16, 11:48 PM CDT	Mesoscale Discussion	SPC	Bosque, Brown, Callahan, Coleman, Collin, Comanche and 34 more	117 min
May 17, 1:48 AM CDT	Mesoscale Discussion	SPC	Bosque, Brown, Collin, Comanche, Dallas, Denton and 22 more	57 min
May 17, 2:25 AM CDT	Mesoscale Discussion	SPC	Edwards, Gillespie, Kerr, Kimble, Lampasas, Llano and 3 more	95 min

Nearby

Mesoscale Discussions in Oklahoma, 2015 Mesoscale Discussions in Texas, 2015 Every mesoscale discussion in 2015

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.