Alert archive / Oklahoma / Mesoscale Discussions in 2014

Mesoscale Discussion 1185

June 28, 201423 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2014, 8:41 AM CDT for 23 counties in Oklahoma. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Jun 28, 2014, 8:41 AM CDT (13:41 UTC)
Expired: Jun 28, 2014, 9:45 AM CDT
In force: 64 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 23 counties

Alfalfa County, OK, Blaine County, OK, Canadian County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Tulsa County, OK, Washington County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 51 km from the middle of the area, began a volume at 13:44 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

Norman, OK (KOUN), launched 12:00Z, 1.7 hours before the alert went out and 136 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: 2112 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 635 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 233 m²/s²
0-3 km storm-relative helicity: 250 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 12.5

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 27, 9:49 PM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 13 more	86 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

Nearby

Mesoscale Discussions in Oklahoma, 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.