Alert archive / Kansas / Mesoscale Discussions in 2011

Mesoscale Discussion 153

February 27, 20115 counties in Kansas; 5 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Feb 27, 2011, 5:49 PM CST for 5 counties in Kansas; 5 counties in Oklahoma. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: Feb 27, 2011, 5:49 PM CST (23:49 UTC)
Expired: Feb 27, 2011, 6:45 PM CST
In force: 56 min
Issued by: the Storm Prediction Center

Counties Chautauqua County, KS, Cowley County, KS, Elk County, KS, Montgomery County, KS, Wilson County, KS, Alfalfa County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Major County, OK

The radar

The Wichita radar (KICT), 87 km from the middle of the area, began a volume at 23:49 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 12:00Z, 11.8 hours before the alert went out and 193 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: 915 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 543 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 249 m²/s²
0-3 km storm-relative helicity: 231 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.0

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
Feb 27, 12:46 PM CST	Mesoscale Discussion	SPC	Anderson, Butler, Chase, Coffey, Douglas, Franklin and 20 more	59 min
Feb 27, 1:12 PM CST	Severe Thunderstorm Watch	SPC	Allen, Anderson, Butler, Chase, Coffey, Douglas and 22 more	9 hr
Feb 27, 2:12 PM CST	Mesoscale Discussion	SPC	Bourbon, Chautauqua, Cherokee, Cowley, Crawford, Labette and 3 more	93 min
Feb 27, 2:46 PM CST	Tornado Watch	SPC	Chautauqua, Cowley, Elk, Labette, Montgomery, Neosho and 2 more	8 hr
Feb 27, 3:24 PM CST	Mesoscale Discussion	SPC	Anderson, Butler, Chase, Coffey, Douglas, Franklin and 20 more	66 min

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.