Alert archive / Nebraska / Mesoscale Discussions in 2013
Mesoscale Discussion 406
The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2013, 10:15 PM MDT for 4 counties in Colorado; Harrison County, Iowa; 30 counties in Nebraska. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2013, 10:15 PM MDT (04:15 UTC)
- Expired
- Apr 8, 2013, 11:45 PM MDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 35 counties
Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Harrison County, IA, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Chase County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dawson County, NE, Dodge County, NE, Douglas County, NE, Dundy County, NE, Frontier County, NE, Gosper County, NE, Greeley County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Lincoln County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Perkins County, NE, Platte County, NE, Polk County, NE, Saunders County, NE, Sherman County, NE, Stanton County, NE, Valley County, NE, Washington County, NE
The radar
The Grand Island radar (KUEX), 129 km from the middle of the area, began a volume at 04:15 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, 4.3 hours before the alert went out and 75 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
- 1694 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1029 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- -0.1
- 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 8, 7:43 PM MDT | Mesoscale Discussion | SPC | Logan, Morgan, Phillips, Sedgwick, Washington, Yuma | 62 min |
| Apr 9, 5:46 PM MDT | Mesoscale Discussion | SPC | Sedgwick | 5 hr |
| Apr 9, 4:12 AM MDT | Mesoscale Discussion | SPC | Audubon, Boone, Buena Vista, Butler, Calhoun, Carroll and 25 more | 93 min |
| Apr 9, 9:27 AM MDT | Mesoscale Discussion | SPC | Clayton, Dubuque | 3 hr |
| Apr 9, 4:45 PM MDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page | 7 hr |
| Apr 9, 11:30 AM MDT | Mesoscale Discussion | SPC | Antelope, Boone, Buffalo, Custer, Dawson, Franklin and 21 more | 4 hr |
Nearby
Mesoscale Discussions in Nebraska, 2013Mesoscale Discussions in Colorado, 2013Mesoscale Discussions in Iowa, 2013Every mesoscale discussion in 2013
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.