Alert archive / Kansas / Mesoscale Discussions in 2011

Mesoscale Discussion 2238

October 8, 20114 states

The Storm Prediction Center issued this mesoscale discussion at Oct 8, 2011, 12:55 AM CDT for 4 states. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Oct 8, 2011, 12:55 AM CDT (05:55 UTC)
Expired: Oct 8, 2011, 2:30 AM CDT
In force: 95 min
Issued by: the Storm Prediction Center

All 41 counties

Decatur County, KS, Ellis County, KS, Finney County, KS, Gove County, KS, Graham County, KS, Grant County, KS, Gray County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Hodgeman County, KS, Kearny County, KS, Lane County, KS, Logan County, KS, Morton County, KS, Ness County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rooks County, KS, Scott County, KS, Seward County, KS, Sheridan County, KS, Smith County, KS, Stanton County, KS, Stevens County, KS, Trego County, KS, Wichita County, KS, Franklin County, NE, Furnas County, NE, Harlan County, NE, Webster County, NE, Cimarron County, OK, Texas County, OK, Dallam County, TX, Hansford County, TX, Hartley County, TX, Moore County, TX, Oldham County, TX, Potter County, TX, Sherman County, TX

The radar

The Dodge City radar (KDDC), 130 km from the middle of the area, began a volume at 05:55 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 864Oct 8, 1:50 AM CDT

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 5.9 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: 442 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 1533 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.9

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
Oct 7, 10:25 PM CDT	Mesoscale Discussion	SPC	Finney, Gove, Graham, Grant, Greeley, Hamilton and 12 more	95 min
Oct 8, 1:47 AM CDT	Severe Thunderstorm Watch	SPC	Clark, Decatur, Finney, Ford, Gove, Graham and 24 more	5 hr
Oct 8, 5:28 AM CDT	Mesoscale Discussion	SPC	Clark, Decatur, Ford, Gove, Graham, Gray and 7 more	62 min
Oct 7, 9:25 PM CDT	Mesoscale Discussion	SPC	Boone, Buffalo, Dawson, Gosper, Greeley, Hall and 8 more	95 min
Oct 7, 11:28 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Dawson, Franklin, Frontier, Furnas and 10 more	62 min
Oct 7, 8:40 PM CDT	Mesoscale Discussion	SPC	Bailey, Castro, Cochran, Gaines, Hockley, Lamb and 3 more	95 min
Oct 7, 11:39 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Borden, Castro, Cochran, Crane and 21 more	96 min
Oct 7, 11:57 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Bailey, Castro, Cochran, Crane, Dawson and 17 more	6 hr

Nearby

Mesoscale Discussions in Kansas, 2011 Mesoscale Discussions in Texas, 2011 Mesoscale Discussions in Nebraska, 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.