Alert archive / Kansas / Mesoscale Discussions in 2005

Mesoscale Discussion 850

May 12, 200520 counties in Kansas; 16 counties in Oklahoma; 10 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 12, 2005, 9:35 PM CDT for 20 counties in Kansas; 16 counties in Oklahoma; 10 counties in Texas. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: May 12, 2005, 9:35 PM CDT (02:35 UTC)
Expired: May 12, 2005, 11:00 PM CDT
In force: 85 min
Issued by: the Storm Prediction Center

All 46 counties

Barber County, KS, Butler County, KS, Chase County, KS, Coffey County, KS, Comanche County, KS, Cowley County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Kiowa County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Pratt County, KS, Reno County, KS, Rice County, KS, Sedgwick County, KS, Stafford County, KS, Sumner County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harper County, OK, Kay County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Carson County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hemphill County, TX, Lipscomb County, TX, Randall County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Vance AFB radar (KVNX), 60 km from the middle of the area, began a volume at 02:34 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 265May 12, 11:35 PM CDT

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 2.6 hours before the alert went out and 117 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: 1203 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.4

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
May 12, 8:26 PM CDT	Mesoscale Discussion	SPC	Atchison, Douglas, Jackson, Jefferson, Johnson, Leavenworth and 4 more	34 min
May 13, 3:50 PM CDT	Mesoscale Discussion	SPC	Chautauqua, Harper, Montgomery	85 min
May 13, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	Barber, Bourbon, Chautauqua, Cherokee, Comanche, Cowley and 8 more	7 hr
May 12, 7:56 PM CDT	Mesoscale Discussion	SPC	Beckham, Greer, Harmon, Jackson	64 min
May 12, 8:40 PM CDT	Tornado Watch	SPC	Greer, Harmon, Jackson	5 hr
May 12, 10:48 PM CDT	Mesoscale Discussion	SPC	Caddo, Comanche, Cotton, Garvin, Grady, Jefferson and 3 more	57 min
May 12, 11:35 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 17 more	5 hr
May 13, 1:04 AM CDT	Mesoscale Discussion	SPC	Caddo, Canadian, Comanche, Cotton, Garfield, Grady and 5 more	86 min
May 13, 4:04 AM CDT	Mesoscale Discussion	SPC	Comanche, Cotton, Stephens, Tillman	56 min
May 13, 1:52 PM CDT	Mesoscale Discussion	SPC	Harmon, Jackson	83 min
May 13, 2:10 PM CDT	Tornado Watch	SPC	Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more	7 hr
May 13, 5:56 PM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more	64 min
May 13, 6:25 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Custer, Dewey, Garfield, Grant and 12 more	65 min
May 13, 6:45 PM CDT	Tornado Watch	SPC	Blaine, Caddo, Canadian, Cleveland, Comanche, Cotton and 20 more	7 hr
May 13, 1:12 AM CDT	Mesoscale Discussion	SPC	Childress, Cottle, Crosby, Floyd, Hale, Hall and 2 more	63 min
May 13, 1:30 AM CDT	Severe Thunderstorm Watch	SPC	Baylor, Cottle, Crosby, Dickens, Floyd, Foard and 8 more	5 hr
May 13, 2:13 PM CDT	Mesoscale Discussion	SPC	Brewster, Crockett, Irion, Terrell	2 hr
May 13, 6:08 PM CDT	Mesoscale Discussion	SPC	Coke, Crane, Fisher, Glasscock, Howard, Irion and 11 more	67 min
May 13, 6:25 PM CDT	Tornado Watch	SPC	Brown, Callahan, Coke, Coleman, Concho, Eastland and 16 more	7 hr

Nearby

Mesoscale Discussions in Kansas, 2005 Mesoscale Discussions in Oklahoma, 2005 Mesoscale Discussions in Texas, 2005 Every mesoscale discussion in 2005

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.