Alert archive / Iowa / Mesoscale Discussions in 2005
Mesoscale Discussion 2227
The Storm Prediction Center issued this mesoscale discussion at Sep 18, 2005, 10:00 PM CDT for 68 counties in Iowa; Putnam County, Worth County, Missouri; 5 counties in Nebraska. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- Sep 18, 2005, 10:00 PM CDT (03:00 UTC)
- Expired
- Sep 18, 2005, 11:00 PM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
All 75 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Benton County, IA, Boone 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, Clarke County, IA, Clay County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur 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, Henry County, IA, Humboldt County, IA, Ida County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Kossuth County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mills County, IA, Monona County, IA, Monroe County, IA, Montgomery County, IA, O'Brien County, IA, Page County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Webster County, IA, Woodbury County, IA, Wright County, IA, Putnam County, MO, Worth County, MO, Burt County, NE, Douglas County, NE, Sarpy County, NE, Saunders County, NE, Washington County, NE
The radar
The Des Moines radar (KDMX), 47 km from the middle of the area, began a volume at 03:02 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 00:00Z, 3.0 hours before the alert went out and 186 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
- 2068 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1326 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 8.9
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 |
|---|---|---|---|---|
| Sep 18, 8:13 PM CDT | Mesoscale Discussion | SPC | Adair, Appanoose, Audubon, Benton, Black Hawk, Boone and 73 more | 62 min |
| Sep 18, 10:05 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 52 more | 5 hr |
| Sep 18, 11:44 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Boone, Calhoun, Carroll, Cass and 10 more | 91 min |
| Sep 19, 1:34 AM CDT | Mesoscale Discussion | SPC | Benton, Black Hawk, Bremer, Buchanan, Cedar, Chickasaw and 16 more | 86 min |
| Sep 19, 11:49 AM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Decatur, Des Moines, Henry, Jefferson and 11 more | 86 min |
| Sep 19, 1:00 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Lee, Van Buren | 5 hr |
| Sep 19, 3:48 PM CDT | Mesoscale Discussion | SPC | Des Moines, Lee, Van Buren | 87 min |
| Sep 19, 5:20 PM CDT | Mesoscale Discussion | SPC | Audrain, Bates, Benton, Boone, Callaway, Camden and 25 more | 55 min |
| Sep 19, 5:50 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Boone, Callaway, Cole, Franklin, Gasconade and 9 more | 5 hr |
Nearby
Mesoscale Discussions in Iowa, 2005Mesoscale Discussions in Nebraska, 2005Mesoscale Discussions in Missouri, 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.