Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 1020

June 5, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2007, 6:22 PM MDT for 4 states. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Jun 5, 2007, 6:22 PM MDT (00:22 UTC)
Expired: Jun 5, 2007, 8:15 PM MDT
In force: 113 min
Issued by: the Storm Prediction Center

All 34 counties

Kit Carson County, CO, Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Cheyenne County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Arthur County, NE, Box Butte County, NE, Chase County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Sheridan County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD

The radar

The North Platte radar (KLNX), 152 km from the middle of the area, began a volume at 00:26 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

Rapid City, SD (KUNR), launched 00:00Z, 0.4 hours before the alert went out and 186 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: 1014 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1939 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 357 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 10.3

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 6, 12:04 PM MDT	Tornado Watch	SPC	Box Butte, Dawes, Sioux	6 hr
Jun 6, 2:31 PM MDT	Mesoscale Discussion	SPC	Cherry	119 min
Jun 6, 2:45 PM MDT	Tornado Watch	SPC	Blaine, Brown, Cherry, Garden, Grant, Hooker and 5 more	7 hr
Jun 6, 5:56 PM MDT	Mesoscale Discussion	SPC	Antelope, Arthur, Blaine, Boone, Boyd, Brown and 24 more	2 hr
Jun 5, 10:47 PM MDT	Mesoscale Discussion	SPC	Buffalo, Corson, Dewey, Hughes, Hyde, Jones and 9 more	88 min
Jun 6, 11:36 AM MDT	Mesoscale Discussion	SPC	Butte, Custer, Fall River, Lawrence	114 min
Jun 6, 5:19 PM MDT	Mesoscale Discussion	SPC	Butte, Custer, Fall River, Harding, Lawrence, Meade and 3 more	26 min
Jun 6, 5:47 PM MDT	Tornado Watch	SPC	Butte, Harding, Meade, Perkins	7 hr

Nearby

Mesoscale Discussions in Nebraska, 2007 Mesoscale Discussions in South Dakota, 2007 Mesoscale Discussions in Colorado, 2007 Every mesoscale discussion in 2007

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.