Alert archive / Nebraska / Mesoscale Discussions in 2005
Mesoscale Discussion 604
The Storm Prediction Center issued this mesoscale discussion at Apr 20, 2005, 1:14 AM CDT for Harrison County, Monona County, Woodbury County, Iowa; 21 counties in Nebraska. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 20, 2005, 1:14 AM CDT (06:14 UTC)
- Expired
- Apr 20, 2005, 3:15 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 24 counties
Harrison County, IA, Monona County, IA, Woodbury County, IA, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Knox County, NE, Madison County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Saunders County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE
The radar
The Omaha radar (KOAX), 87 km from the middle of the area, began a volume at 06:17 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
Omaha, NE (KOAX), launched 00:00Z, 6.2 hours before the alert went out and 87 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
- 1217 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1628 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
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 19, 7:38 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Boone, Calhoun, Carroll, Cass and 27 more | 2 hr |
| Apr 20, 1:18 AM CDT | Mesoscale Discussion | SPC | Harrison, Monona, Woodbury | 117 min |
| Apr 19, 7:21 PM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Brown, Chase, Cherry and 16 more | 114 min |
| Apr 19, 9:30 PM CDT | Severe Thunderstorm Watch | SPC | Blaine, Brown, Buffalo, Custer, Dawson, Garfield and 14 more | 8 hr |
| Apr 19, 10:56 PM CDT | Mesoscale Discussion | SPC | Antelope, Blaine, Boyd, Brown, Buffalo, Cedar and 23 more | 94 min |
| Apr 20, 6:23 PM CDT | Mesoscale Discussion | SPC | Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 4 more | 97 min |
Nearby
Mesoscale Discussions in Nebraska, 2005Mesoscale Discussions in Iowa, 2005Every mesoscale discussion in 2005
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.