Alert archive / Oklahoma / Mesoscale Discussions in 2014

Mesoscale Discussion 1182

June 27, 201419 counties in Oklahoma; 13 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 27, 2014, 9:49 PM CDT for 19 counties in Oklahoma; 13 counties in Texas. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 27, 2014, 9:49 PM CDT (02:49 UTC)
Expired: Jun 27, 2014, 11:15 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 32 counties

Beckham County, OK, Blaine County, OK, Caddo County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, Knox County, TX, Shackelford County, TX, Stephens County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 13 km from the middle of the area, began a volume at 02:49 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

Norman, OK (KOUN), launched 00:00Z, 2.8 hours before the alert went out and 171 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: 1605 J/kg
Mixed-layer CIN: -266 J/kg
Mixed-layer LCL: 1414 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 28, 8:41 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Canadian, Creek, Custer, Dewey and 17 more	64 min
Jun 28, 11:26 AM CDT	Mesoscale Discussion	SPC	Canadian, Craig, Creek, Delaware, Kay, Kingfisher and 16 more	94 min
Jun 28, 2:34 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Cherokee, Craig, Creek, Delaware, Haskell and 10 more	5 hr
Jun 28, 3:21 PM CDT	Mesoscale Discussion	SPC	Beckham, Caddo, Comanche, Cotton, Custer, Dewey and 7 more	84 min
Jun 27, 8:29 PM CDT	Mesoscale Discussion	SPC	Andrews, Armstrong, Bailey, Borden, Briscoe, Carson and 48 more	91 min
Jun 27, 11:11 PM CDT	Mesoscale Discussion	SPC	Borden, Briscoe, Childress, Cottle, Crane, Crockett and 25 more	64 min
Jun 28, 5:12 PM CDT	Mesoscale Discussion	SPC	Dickens, Fisher, Garza, Haskell, Howard, Jones and 7 more	93 min

Nearby

Mesoscale Discussions in Oklahoma, 2014 Mesoscale Discussions in Texas, 2014 Every mesoscale discussion in 2014

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.