Alert archive / Nebraska / Mesoscale Discussions in 2011

Mesoscale Discussion 1563

July 10, 201135 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2011, 7:21 PM CDT for 35 counties in Nebraska. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Jul 10, 2011, 7:21 PM CDT (00:21 UTC)
Expired: Jul 10, 2011, 8:45 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

All 35 counties

Adams County, NE, Blaine County, NE, Brown County, NE, Buffalo County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 74 km from the middle of the area, began a volume at 00:24 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.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.4 hours before the alert went out and 29 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: 2656 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1844 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 7.0

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
Jul 10, 7:24 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Blaine, Boyd, Brown, Buffalo, Chase and 38 more	6 hr
Jul 10, 10:27 PM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Buffalo, Burt, Butler, Cedar and 27 more	63 min
Jul 10, 10:57 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Burt, Butler, Cedar, Colfax and 14 more	4 hr
Jul 10, 11:56 PM CDT	Severe Thunderstorm Watch	SPC	Dakota, Dixon	4 hr
Jul 11, 2:50 PM CDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 8 more	85 min
Jul 11, 3:07 PM CDT	Severe Thunderstorm Watch	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 5 more	7 hr
Jul 11, 5:01 PM CDT	Mesoscale Discussion	SPC	Cherry, Dawes, Sheridan	29 min
Jul 11, 5:06 PM CDT	Tornado Watch	SPC	Box Butte, Cherry, Dawes, Sheridan, Sioux	5 hr

Nearby

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.