Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 1440

July 23, 20144 counties in Kansas; 8 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 23, 2014, 9:21 AM CDT for 4 counties in Kansas; 8 counties in Nebraska. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Jul 23, 2014, 9:21 AM CDT (14:21 UTC)
Expired: Jul 23, 2014, 10:45 AM CDT
In force: 84 min
Issued by: the Storm Prediction Center
Chance of a watch: 5%

Counties Decatur County, KS, Graham County, KS, Norton County, KS, Rawlins County, KS, Chase County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Hayes County, NE, Hitchcock County, NE, Perkins County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 148 km from the middle of the area, began a volume at 14:21 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, 2.4 hours before the alert went out and 86 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: 151 J/kg
Mixed-layer CIN: -538 J/kg
Mixed-layer LCL: 1063 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

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 23, 3:19 AM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Graham, Norton, Phillips, Rawlins and 4 more	116 min
Jul 23, 11:56 AM CDT	Mesoscale Discussion	SPC	Cherokee, Labette	94 min
Jul 22, 9:17 PM CDT	Mesoscale Discussion	SPC	Box Butte, Dawes, Grant, Hooker, Sheridan	88 min
Jul 23, 3:15 PM CDT	Mesoscale Discussion	SPC	Banner, Kimball, Scotts Bluff, Sioux	60 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.