Alert archive / Oklahoma / Mesoscale Discussions in 2011

Mesoscale Discussion 1251

June 16, 20117 counties in Arkansas; 4 counties in Missouri; 14 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2011, 5:17 PM CDT for 7 counties in Arkansas; 4 counties in Missouri; 14 counties in Oklahoma. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jun 16, 2011, 5:17 PM CDT (22:17 UTC)
Expired: Jun 16, 2011, 6:15 PM CDT
In force: 58 min
Issued by: the Storm Prediction Center

All 25 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Barry County, MO, McDonald County, MO, Newton County, MO, Stone County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Mayes County, OK, Muskogee County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 63 km from the middle of the area, began a volume at 22:18 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

Springfield, MO (KSGF), launched 12:00Z, 10.3 hours before the alert went out and 130 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: 26 J/kg
Mixed-layer CIN: -387 J/kg
Mixed-layer LCL: 2134 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 209 m²/s²
0-3 km storm-relative helicity: 327 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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
Jun 16, 12:26 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll, Crawford, Franklin, Madison, Washington	7 hr
Jun 16, 3:41 PM CDT	Mesoscale Discussion	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Dallas and 23 more	64 min
Jun 16, 4:41 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Clark, Clay, Cleveland, Craighead, Crittenden and 24 more	7 hr
Jun 16, 6:18 PM CDT	Mesoscale Discussion	SPC	Arkansas, Crittenden, Cross, Desha, Lee, Lincoln and 5 more	87 min
Jun 15, 11:18 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Dewey, Ellis, Harper, Major and 2 more	57 min
Jun 16, 11:52 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Creek, Delaware, Kay and 14 more	53 min
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, 6:18 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Custer, Dewey, Ellis, Greer and 7 more	87 min

Nearby

Mesoscale Discussions in Oklahoma, 2011 Mesoscale Discussions in Arkansas, 2011 Mesoscale Discussions in Missouri, 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.