Alert archive / Nebraska / Mesoscale Discussions in 2015
Mesoscale Discussion 285
The Storm Prediction Center issued this mesoscale discussion at Apr 12, 2015, 5:42 PM CDT for 4 states. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Apr 12, 2015, 5:42 PM CDT (22:42 UTC)
- Expired
- Apr 12, 2015, 6:45 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 71 counties
Plymouth County, IA, Woodbury County, IA, Clay County, KS, Cloud County, KS, Ellis County, KS, Ellsworth County, KS, Jewell County, KS, Lincoln County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Republic County, KS, Rooks County, KS, Russell County, KS, Saline County, KS, Smith County, KS, Washington County, KS, Adams County, NE, Antelope County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gage County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Valley County, NE, Wayne County, NE, Webster County, NE, Wheeler County, NE, York County, NE, Clay County, SD, Union County, SD
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 10.7 hours before the alert went out and 144 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1825 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 337 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 8:19 PM CDT | Mesoscale Discussion | SPC | Barber, Clark, Comanche, Edwards, Ford, Grant and 7 more | 56 min |
| Apr 12, 5:03 PM CDT | Mesoscale Discussion | SPC | Barber, Comanche, Harper, Kingman, Kiowa, Pratt and 2 more | 57 min |
| Apr 12, 5:17 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Barton, Butler, Clark, Comanche, Cowley and 13 more | 7 hr |
Nearby
Mesoscale Discussions in Nebraska, 2015Mesoscale Discussions in Kansas, 2015Mesoscale Discussions in Iowa, 2015Every mesoscale discussion in 2015
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.