Alert archive / Nebraska / Mesoscale Discussions in 2007
Mesoscale Discussion 1649
The Storm Prediction Center issued this mesoscale discussion at Aug 4, 2007, 9:07 PM CDT for Harrison County, Monona County, Pottawattamie County, Iowa; 30 counties in Nebraska. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Aug 4, 2007, 9:07 PM CDT (02:07 UTC)
- Expired
- Aug 4, 2007, 10:00 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 33 counties
Harrison County, IA, Monona County, IA, Pottawattamie County, IA, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dakota County, NE, Dawson County, NE, Dodge County, NE, Douglas County, NE, Frontier County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Saunders County, NE, Sherman County, NE, Stanton County, NE, Thurston County, NE, Valley County, NE, Washington County, NE, Wayne County, NE
The radar
The Omaha radar (KOAX), 137 km from the middle of the area, began a volume at 02:08 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, 2.1 hours before the alert went out and 136 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
- 1034 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 1889 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
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 |
|---|---|---|---|---|
| Aug 4, 7:42 PM CDT | Tornado Watch | SPC | Audubon, Boone, Buena Vista, Calhoun, Carroll, Cherokee and 16 more | 3 hr |
| Aug 4, 9:22 PM CDT | Mesoscale Discussion | SPC | Audubon, Boone, Buena Vista, Calhoun, Carroll, Cherokee and 15 more | 53 min |
| Aug 5, 3:54 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Benton, Cass, Cedar and 39 more | 96 min |
| Aug 5, 4:27 PM CDT | Mesoscale Discussion | SPC | Arthur, Cherry, Deuel, Grant, Hooker, Keith and 2 more | 2 hr |
Nearby
Mesoscale Discussions in Nebraska, 2007Mesoscale Discussions in Iowa, 2007Every mesoscale discussion in 2007
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.