Alert archive / Nebraska / Mesoscale Discussions in 2010

Mesoscale Discussion 849

June 7, 20104 states

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2010, 6:23 PM MDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 7, 2010, 6:23 PM MDT (00:23 UTC)
Expired: Jun 7, 2010, 8:30 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 61 counties

Adams County, CO, Boulder County, CO, Larimer County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Weld County, CO, Arthur County, NE, Banner County, NE, Blaine County, NE, Box Butte County, NE, Brown County, NE, Buffalo County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Custer County, NE, Dawes County, NE, Dawson County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Greeley 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, Kimball County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sherman County, NE, Sioux County, NE, Thomas County, NE, Valley County, NE, Bennett County, SD, Fall River County, SD, Oglala Lakota County, SD, Albany County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The North Platte radar (KLNX), 96 km from the middle of the area, began a volume at 00:25 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 70 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: 1563 J/kg
Mixed-layer CIN: -199 J/kg
Mixed-layer LCL: 756 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 297 m²/s²
0-3 km storm-relative helicity: 284 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
Jun 7, 8:42 PM MDT	Mesoscale Discussion	SPC	Logan, Sedgwick	2 hr
Jun 8, 12:22 AM MDT	Mesoscale Discussion	SPC	Kit Carson, Logan, Phillips, Sedgwick, Washington, Yuma	113 min
Jun 7, 6:55 PM MDT	Tornado Watch	SPC	Arthur, Chase, Cherry, Deuel, Frontier, Garden and 10 more	7 hr
Jun 7, 9:31 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Antelope, Blaine, Boone, Brown, Buffalo and 56 more	7 hr
Jun 7, 10:37 PM MDT	Mesoscale Discussion	SPC	Adams, Boone, Buffalo, Butler, Cass, Chase and 45 more	113 min
Jun 8, 1:56 AM MDT	Mesoscale Discussion	SPC	Blaine, Buffalo, Burt, Butler, Cass, Colfax and 28 more	2 hr

Nearby

Mesoscale Discussions in Nebraska, 2010 Mesoscale Discussions in Colorado, 2010 Mesoscale Discussions in Wyoming, 2010 Every mesoscale discussion in 2010

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.