Alert archive / Iowa / Mesoscale Discussions in 2005
Mesoscale Discussion 809
The Storm Prediction Center issued this mesoscale discussion at May 10, 2005, 7:30 PM CDT for 32 counties in Iowa. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 10, 2005, 7:30 PM CDT (00:30 UTC)
- Expired
- May 10, 2005, 9:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 32 counties
Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hardin County, IA, Iowa County, IA, Jasper County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Louisa County, IA, Marshall County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Story County, IA, Tama County, IA, Washington County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 105 km from the middle of the area, began a volume at 00:30 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
Davenport, (KDVN), launched 00:00Z, 0.5 hours before the alert went out and 193 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
- 422 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 2014 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 |
|---|---|---|---|---|
| May 10, 9:14 PM CDT | Mesoscale Discussion | SPC | Audubon, Black Hawk, Boone, Bremer, Buena Vista, Butler and 33 more | 2 hr |
| May 10, 9:54 PM CDT | Mesoscale Discussion | SPC | Allamakee, Cerro Gordo, Chickasaw, Clay, Clayton, Dickinson and 15 more | 2 hr |
| May 10, 11:35 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Benton, Black Hawk, Boone, Bremer and 35 more | 85 min |
| May 11, 3:11 AM CDT | Mesoscale Discussion | SPC | Cedar, Clinton, Johnson, Louisa, Muscatine, Scott and 1 more | 2 hr |
| May 11, 8:41 AM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Henry, Jefferson, Lee, Van Buren and 1 more | 2 hr |
Nearby
Mesoscale 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.