Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 321

March 22, 2007Sumner County, Kansas; 13 counties in Oklahoma; Childress County, Cottle County, Hardeman County, Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 22, 2007, 7:27 PM CDT for Sumner County, Kansas; 13 counties in Oklahoma; Childress County, Cottle County, Hardeman County, Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Mar 22, 2007, 7:27 PM CDT (00:27 UTC)
Expired: Mar 22, 2007, 9:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Sumner County, KS, Blaine County, OK, Caddo County, OK, Canadian County, OK, Custer County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Washita County, OK, Childress County, TX, Cottle County, TX, Hardeman County, TX

The radar

The Vance AFB radar (KVNX), 93 km from the middle of the area, began a volume at 00:27 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, 0.5 hours before the alert went out and 118 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: 692 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 140 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.5

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
Mar 23, 3:58 PM CDT	Mesoscale Discussion	SPC	Clark, Comanche, Ford, Grant, Gray, Haskell and 4 more	62 min
Mar 23, 4:40 PM CDT	Tornado Watch	SPC	Barber, Clark, Comanche, Edwards, Finney, Ford and 13 more	7 hr
Mar 23, 5:50 PM CDT	Mesoscale Discussion	SPC	Butler, Chase, Clay, Cloud, Dickinson, Ellsworth and 21 more	115 min
Mar 22, 9:43 PM CDT	Mesoscale Discussion	SPC	Harmon	62 min
Mar 23, 11:15 AM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	90 min
Mar 23, 1:20 PM CDT	Mesoscale Discussion	SPC	Loving	115 min
Mar 23, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	El Paso, Hudspeth	8 hr
Mar 23, 3:19 PM CDT	Tornado Watch	SPC	Andrews, Bailey, Brewster, Castro, Cochran, Crane and 21 more	8 hr
Mar 23, 6:34 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Brewster, Castro, Cochran, Crane and 20 more	116 min

Nearby

Mesoscale Discussions in Oklahoma, 2007 Mesoscale Discussions in Texas, 2007 Mesoscale Discussions in Kansas, 2007 Every mesoscale discussion in 2007

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.