Alert archive / Kansas / Mesoscale Discussions in 2011

Mesoscale Discussion 1892

August 7, 201117 counties in Kansas; 5 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2011, 7:13 PM CDT for 17 counties in Kansas; 5 counties in Oklahoma. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Aug 7, 2011, 7:13 PM CDT (00:13 UTC)
Expired: Aug 7, 2011, 9:45 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

All 22 counties

Barber County, KS, Clark County, KS, Comanche County, KS, Cowley County, KS, Edwards County, KS, Ford County, KS, Harper County, KS, Harvey County, KS, Hodgeman County, KS, Kingman County, KS, Kiowa County, KS, Pawnee County, KS, Pratt County, KS, Reno County, KS, Sedgwick County, KS, Stafford County, KS, Sumner County, KS, Alfalfa County, OK, Grant County, OK, Harper County, OK, Kay County, OK, Woods County, OK

The radar

The Vance AFB radar (KVNX), 85 km from the middle of the area, began a volume at 00:16 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

Dodge City, (KDDC), launched 00:00Z, 0.2 hours before the alert went out and 113 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: 1380 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 2833 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 148 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.8

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
Aug 7, 7:49 PM CDT	Severe Thunderstorm Watch	SPC	Jewell, Mitchell, Osborne, Smith	7 hr
Aug 7, 10:45 PM CDT	Mesoscale Discussion	SPC	Anderson, Clay, Cloud, Coffey, Dickinson, Douglas and 28 more	2 hr
Aug 7, 11:08 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Brown, Chase, Clay, Cloud and 25 more	5 hr
Aug 8, 12:46 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Cherokee, Coffey, Crawford and 7 more	59 min
Aug 8, 1:09 AM CDT	Severe Thunderstorm Watch	SPC	Bourbon, Crawford, Linn, Miami	3 hr
Aug 8, 4:52 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Gove, Graham, Greeley, Logan and 7 more	6 hr
Aug 8, 6:27 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Clark, Comanche, Decatur, Edwards, Ellis and 31 more	2 hr
Aug 8, 6:44 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Comanche, Edwards, Ellis, Finney, Ford and 18 more	4 hr
Aug 7, 8:27 PM CDT	Mesoscale Discussion	SPC	Ottawa	2 hr
Aug 8, 2:04 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Haskell, Latimer, LeFlore, McIntosh and 5 more	86 min
Aug 8, 5:30 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 30 more	2 hr
Aug 8, 6:01 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Craig and 29 more	6 hr

Nearby

Mesoscale Discussions in Kansas, 2011 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.