Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 1472

July 13, 2007Logan County, Phillips County, Sedgwick County, Colorado; 21 counties in Nebraska; Goshen County, Laramie County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2007, 3:34 PM MDT for Logan County, Phillips County, Sedgwick County, Colorado; 21 counties in Nebraska; Goshen County, Laramie County, Wyoming. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Jul 13, 2007, 3:34 PM MDT (21:34 UTC)
Expired: Jul 13, 2007, 5:30 PM MDT
In force: 116 min
Issued by: the Storm Prediction Center

All 26 counties

Logan County, CO, Phillips County, CO, Sedgwick County, CO, Arthur County, NE, Banner County, NE, Box Butte County, NE, Chase County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keith County, NE, Kimball County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Thomas County, NE, Goshen County, WY, Laramie County, WY

The radar

The North Platte radar (KLNX), 169 km from the middle of the area, began a volume at 21:33 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, 9.6 hours before the alert went out and 184 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: 1 J/kg
Mixed-layer CIN: -272 J/kg
Mixed-layer LCL: 891 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 12, 7:29 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Kit Carson	91 min

Nearby

Mesoscale Discussions in Nebraska, 2007 Mesoscale Discussions in Colorado, 2007 Mesoscale Discussions in Wyoming, 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.