Alert archive / Iowa / Mesoscale Discussions in 2004
Mesoscale Discussion 2085
The Storm Prediction Center issued this mesoscale discussion at Aug 23, 2004, 2:58 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 23, 2004, 2:58 PM CDT (19:58 UTC)
- Expired
- Aug 23, 2004, 5:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 98 counties
Audubon County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Cherokee County, IA, Chickasaw County, IA, Clay County, IA, Crawford County, IA, Dallas County, IA, Dickinson County, IA, Emmet County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Harrison County, IA, Howard County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Lyon County, IA, Marshall County, IA, Mills County, IA, Mitchell County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Polk County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Story County, IA, Tama County, IA, Webster County, IA, Winnebago County, IA, Winneshiek County, IA, Woodbury County, IA, Worth County, IA, Wright County, IA, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Jackson County, MN, Martin County, MN, Mower County, MN, Nobles County, MN, Olmsted County, MN, Rock County, MN, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Lancaster County, NE, Madison County, NE, Nance County, NE, Otoe County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, York County, NE, Clay County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Omaha radar (KOAX), 113 km from the middle of the area, began a volume at 20:01 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 8.0 hours before the alert went out and 113 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
- 2037 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 887 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
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 |
|---|---|---|---|---|
| Aug 23, 5:30 PM CDT | Mesoscale Discussion | SPC | Allamakee, Chickasaw, Dickinson, Emmet, Floyd, Howard and 7 more | 2 hr |
| Aug 23, 3:37 PM CDT | Mesoscale Discussion | SPC | Arthur, Blaine, Boyd, Brown, Buffalo, Chase and 33 more | 113 min |
| Aug 23, 5:05 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Blaine, Brown, Chase, Cherry, Deuel and 16 more | 6 hr |
| Aug 23, 5:34 PM CDT | Mesoscale Discussion | SPC | Butler, Cass, Fillmore, Gage, Jefferson, Johnson and 11 more | 116 min |
| Aug 23, 6:15 PM CDT | Tornado Watch | SPC | Clay, Fillmore, Gage, Jefferson, Johnson, Nemaha and 4 more | 7 hr |
| Aug 22, 7:32 PM CDT | Mesoscale Discussion | SPC | Bennett, Jackson, Mellette, Oglala Lakota, Pennington | 118 min |
| Aug 23, 2:22 PM CDT | Mesoscale Discussion | SPC | Bennett, Brule, Buffalo, Campbell, Corson, Dewey and 20 more | 113 min |
| Aug 23, 3:25 PM CDT | Tornado Watch | SPC | Campbell, Corson, Dewey, Edmunds, Faulk, Perkins and 3 more | 6 hr |
| Aug 23, 6:02 PM CDT | Mesoscale Discussion | SPC | Campbell, Corson, Dewey, Edmunds, Faulk, Perkins and 3 more | 88 min |
Nearby
Mesoscale Discussions in Iowa, 2004Mesoscale Discussions in Nebraska, 2004Mesoscale Discussions in Minnesota, 2004Every mesoscale discussion in 2004
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.