Alert archive / Oklahoma / Mesoscale Discussions in 2011

Mesoscale Discussion 1240

June 15, 20118 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 15, 2011, 11:18 PM CDT for 8 counties in Oklahoma. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Jun 15, 2011, 11:18 PM CDT (04:18 UTC)
Expired: Jun 16, 2011, 12:15 AM CDT
In force: 57 min
Issued by: the Storm Prediction Center

Counties Alfalfa County, OK, Blaine County, OK, Dewey County, OK, Ellis County, OK, Harper County, OK, Major County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 107 km from the middle of the area, began a volume at 04:19 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

Lamont, OK (KLMN), launched 00:00Z, 4.3 hours before the alert went out and 160 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: 706 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 2516 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

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 16, 11:52 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Creek, Delaware, Kay and 14 more	53 min
Jun 16, 12:26 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Cherokee, Craig, Delaware, Mayes, Muskogee and 7 more	7 hr
Jun 16, 3:37 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Ellis, Greer, Harmon, Harper and 2 more	83 min
Jun 16, 3:53 PM CDT	Severe Thunderstorm Watch	SPC	Beaver, Beckham, Comanche, Cotton, Custer, Dewey and 12 more	6 hr
Jun 16, 5:17 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Delaware, Mayes, Muskogee and 8 more	58 min
Jun 16, 6:18 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Custer, Dewey, Ellis, Greer and 7 more	87 min

Nearby

Mesoscale Discussions in Oklahoma, 2011 Every mesoscale discussion in 2011

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.