Alert archive / Nebraska / Mesoscale Discussions in 2011

Mesoscale Discussion 1323

June 20, 2011Decatur County, Rawlins County, Thomas County, Kansas; 5 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2011, 2:52 PM CDT for Decatur County, Rawlins County, Thomas County, Kansas; 5 counties in Nebraska. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jun 20, 2011, 2:52 PM CDT (19:52 UTC)
Expired: Jun 20, 2011, 3:45 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center

Counties Decatur County, KS, Rawlins County, KS, Thomas County, KS, Hayes County, NE, Hitchcock County, NE, Lincoln County, NE, Logan County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 99 km from the middle of the area, began a volume at 19:53 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 12:00Z, 7.9 hours before the alert went out and 124 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: 163 J/kg
Mixed-layer CIN: -253 J/kg
Mixed-layer LCL: 570 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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
Jun 20, 8:05 AM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Finney, Gove, Graham, Grant and 15 more	55 min
Jun 20, 8:38 AM CDT	Severe Thunderstorm Watch	SPC	Decatur, Ellis, Finney, Gove, Graham, Grant and 25 more	6 hr
Jun 20, 10:42 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Butler, Chase, Chautauqua, Coffey and 18 more	63 min
Jun 20, 12:22 PM CDT	Mesoscale Discussion	SPC	Decatur, Gove, Graham, Logan, Norton, Phillips and 6 more	83 min
Jun 20, 1:00 PM CDT	Tornado Watch PDS	SPC	Decatur, Gove, Graham, Jewell, Mitchell, Norton and 5 more	10 hr
Jun 20, 1:34 PM CDT	Mesoscale Discussion	SPC	Butler, Chase, Clay, Cowley, Dickinson, Ellsworth and 15 more	116 min
Jun 20, 2:19 PM CDT	Mesoscale Discussion	SPC	Norton, Phillips, Smith	86 min
Jun 20, 3:08 PM CDT	Tornado Watch	SPC	Atchison, Brown, Butler, Chase, Chautauqua, Clay and 34 more	7 hr
Jun 20, 3:59 PM CDT	Mesoscale Discussion	SPC	Jewell	61 min
Jun 20, 6:17 PM CDT	Mesoscale Discussion	SPC	Brown, Butler, Chase, Chautauqua, Clay, Coffey and 28 more	58 min
Jun 19, 8:24 PM CDT	Mesoscale Discussion	SPC	Adams, Blaine, Boone, Buffalo, Chase, Clay and 35 more	96 min
Jun 19, 9:16 PM CDT	Mesoscale Discussion	SPC	Burt, Cass, Dodge, Douglas, Lancaster, Nemaha and 4 more	59 min
Jun 19, 9:49 PM CDT	Tornado Watch	SPC	Adams, Antelope, Boone, Buffalo, Burt, Butler and 46 more	6 hr
Jun 20, 12:45 AM CDT	Severe Thunderstorm Watch	SPC	Chase, Dundy, Frontier, Hayes, Hitchcock, Red Willow	2 hr
Jun 20, 3:27 AM CDT	Mesoscale Discussion	SPC	Burt, Butler, Cass, Colfax, Cuming, Dodge and 11 more	33 min
Jun 20, 3:46 AM CDT	Severe Thunderstorm Watch	SPC	Burt, Butler, Cass, Colfax, Cuming, Dodge and 10 more	5 hr
Jun 20, 6:53 PM CDT	Tornado Watch	SPC	Antelope, Boone, Boyd, Burt, Butler, Cass and 29 more	6 hr

Nearby

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