Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 1539

August 9, 20148 counties in Kansas; 30 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 9, 2014, 8:55 PM CDT for 8 counties in Kansas; 30 counties in Nebraska. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Aug 9, 2014, 8:55 PM CDT (01:55 UTC)
Expired: Aug 9, 2014, 10:00 PM CDT
In force: 65 min
Issued by: the Storm Prediction Center

All 38 counties

Decatur County, KS, Jewell County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rooks County, KS, Smith County, KS, Adams County, NE, Arthur County, NE, Buffalo County, NE, Chase County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Merrick County, NE, Nuckolls County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Sherman County, NE, Valley County, NE, Webster County, NE

The radar

The Grand Island radar (KUEX), 100 km from the middle of the area, began a volume at 01:57 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 00:00Z, 1.9 hours before the alert went out and 114 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: 2174 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1673 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 12.8

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
Aug 9, 9:22 PM CDT	Mesoscale Discussion	SPC	Barton, Edwards, Ellis, Ellsworth, Finney, Ford and 13 more	53 min
Aug 9, 11:13 PM CDT	Mesoscale Discussion	SPC	Barton, Clay, Cloud, Dickinson, Edwards, Ellis and 27 more	62 min

Nearby

Mesoscale Discussions in Nebraska, 2014 Mesoscale Discussions in Kansas, 2014 Every mesoscale discussion in 2014

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.