Alert archive / Iowa / Mesoscale Discussions in 2005
Mesoscale Discussion 779
The Storm Prediction Center issued this mesoscale discussion at May 8, 2005, 3:05 PM CDT for 34 counties in Iowa. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- May 8, 2005, 3:05 PM CDT (20:05 UTC)
- Expired
- May 8, 2005, 4:30 PM CDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 34 counties
Black Hawk County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clarke County, IA, Dallas 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, Humboldt County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Story County, IA, Tama County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Webster County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 17 km from the middle of the area, began a volume at 20:05 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, 8.1 hours before the alert went out and 237 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
- 446 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 704 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 162 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.0
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 7, 7:34 PM CDT | Mesoscale Discussion | SPC | Cherokee, Ida, Lyon, Monona, O'Brien, Osceola and 3 more | 116 min |
| May 7, 7:55 PM CDT | Severe Thunderstorm Watch | SPC | Lyon, Plymouth, Sioux | 6 hr |
| May 7, 11:07 PM CDT | Mesoscale Discussion | SPC | Dickinson, Lyon, O'Brien, Osceola, Plymouth, Sioux | 83 min |
| May 8, 1:10 PM CDT | Mesoscale Discussion | SPC | Lyon, Sioux | 3 hr |
| May 8, 1:50 PM CDT | Tornado Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 7 hr |
| May 8, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Carroll, Crawford, Fremont, Harrison, Mills and 5 more | 7 hr |
| May 8, 5:27 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Crawford, Dickinson, Emmet and 12 more | 63 min |
| May 8, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Calhoun, Emmet, Franklin, Hamilton, Hancock, Hardin and 7 more | 8 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.