Alert archive / Iowa / Mesoscale Discussions in 2004
Mesoscale Discussion 2369
The Storm Prediction Center issued this mesoscale discussion at Oct 29, 2004, 5:24 PM CDT for 39 counties in Iowa. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Oct 29, 2004, 5:24 PM CDT (22:24 UTC)
- Expired
- Oct 29, 2004, 7:00 PM CDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 39 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clarke County, IA, Dallas County, IA, Decatur County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mitchell County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 70 km from the middle of the area, began a volume at 22:24 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 12:00Z, 10.4 hours before the alert went out and 255 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
- 1500 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 695 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 227 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 7.8
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 |
|---|---|---|---|---|
| Oct 29, 2:12 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Butler and 46 more | 3 hr |
| Oct 29, 2:50 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 46 more | 6 hr |
| Oct 29, 3:35 PM CDT | Tornado Watch | SPC | Emmet, Winnebago, Worth | 5 hr |
| Oct 29, 5:46 PM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Buchanan, Cedar, Clayton, Clinton and 18 more | 89 min |
| Oct 29, 6:30 PM CDT | Tornado Watch | SPC | Allamakee, Benton, Buchanan, Cedar, Clayton, Clinton and 19 more | 6 hr |
Nearby
Mesoscale Discussions in Iowa, 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.