Alert archive / Nebraska / Mesoscale Discussions in 2012

Mesoscale Discussion 1351

July 1, 20126 states

The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2012, 5:43 PM MDT for 6 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jul 1, 2012, 5:43 PM MDT (23:43 UTC)
Expired: Jul 1, 2012, 8:15 PM MDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 42 counties

Baca County, CO, Bent County, CO, Cheyenne County, CO, Kiowa County, CO, Kit Carson County, CO, Logan County, CO, Phillips County, CO, Prowers County, CO, Sedgwick County, CO, Yuma County, CO, Cheyenne County, KS, Greeley County, KS, Hamilton County, KS, Kearny County, KS, Logan County, KS, Morton County, KS, Rawlins County, KS, Sherman County, KS, Stanton County, KS, Thomas County, KS, Wallace County, KS, Wichita 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, Keith County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Sheridan County, NE, Sioux County, NE, Union County, NM, Cimarron County, OK, Dallam County, TX

The radar

The Goodland radar (KGLD), 90 km from the middle of the area, began a volume at 23:45 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

Denver, CO (KDNR), launched 12:00Z, 11.7 hours before the alert went out and 79 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: 10 J/kg
Mixed-layer CIN: -533 J/kg
Mixed-layer LCL: 2946 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: -8 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
Jun 30, 7:45 PM MDT	Mesoscale Discussion	SPC	Atchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 3 more	90 min

Nearby

Mesoscale Discussions in Nebraska, 2012 Mesoscale Discussions in Kansas, 2012 Mesoscale Discussions in Colorado, 2012 Every mesoscale discussion in 2012

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.