Alert archive / Kansas / Mesoscale Discussions in 2011

Mesoscale Discussion 748

May 11, 20116 counties in Kansas; 6 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 11, 2011, 7:51 PM CDT for 6 counties in Kansas; 6 counties in Nebraska. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: May 11, 2011, 7:51 PM CDT (00:51 UTC)
Expired: May 11, 2011, 9:15 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

Counties Cheyenne County, KS, Decatur County, KS, Norton County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Dundy County, NE, Frontier County, NE, Furnas County, NE, Hayes County, NE, Hitchcock County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 78 km from the middle of the area, began a volume at 00:53 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.9 hours before the alert went out and 152 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 652 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 271 m²/s²
0-3 km storm-relative helicity: 302 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 11, 8:16 PM CDT	Mesoscale Discussion	SPC	Brown, Nemaha	59 min
May 12, 2:37 PM CDT	Tornado Watch	SPC	Cloud, Jewell, Mitchell, Phillips, Republic, Smith and 1 more	7 hr
May 12, 3:17 PM CDT	Severe Thunderstorm Watch	SPC	Bourbon, Cherokee, Crawford	7 hr
May 12, 4:54 PM CDT	Mesoscale Discussion	SPC	Atchison, Douglas, Jefferson, Johnson, Leavenworth, Linn and 2 more	66 min
May 12, 5:31 PM CDT	Severe Thunderstorm Watch	SPC	Linn, Miami	6 hr
May 12, 6:30 PM CDT	Mesoscale Discussion	SPC	Cherokee	90 min
May 12, 2:06 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Buffalo, Butler, Cass, Clay and 39 more	114 min
May 12, 5:35 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Burt, Butler, Cass, Clay and 30 more	85 min

Nearby

Mesoscale Discussions in Kansas, 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.