Alert archive / Iowa / Mesoscale Discussions in 2007
Mesoscale Discussion 542
The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2007, 6:36 PM CDT for 33 counties in Iowa. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Apr 22, 2007, 6:36 PM CDT (23:36 UTC)
- Expired
- Apr 22, 2007, 8:30 PM CDT
- In force
- 114 min
- Issued by
- the Storm Prediction Center
All 33 counties
Appanoose County, IA, Black Hawk County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Davis County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Humboldt County, IA, Jasper County, IA, Kossuth County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mitchell County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Story County, IA, Tama County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 55 km from the middle of the area, began a volume at 23:39 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, 11.6 hours before the alert went out and 280 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1189 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -53 m²/s²
- 0-3 km storm-relative helicity
- -25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
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 |
|---|---|---|---|---|
| Apr 22, 10:57 AM CDT | Mesoscale Discussion | SPC | Fremont, Mills, Page | 93 min |
| Apr 22, 12:07 PM CDT | Mesoscale Discussion | SPC | Adair, Allamakee, Benton, Black Hawk, Boone, Bremer and 55 more | 113 min |
| Apr 22, 1:17 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 52 more | 8 hr |
| Apr 22, 1:25 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Buena Vista, Calhoun, Carroll and 26 more | 95 min |
| Apr 22, 1:56 PM CDT | Tornado Watch | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 31 more | 7 hr |
| Apr 22, 5:59 PM CDT | Mesoscale Discussion | SPC | Boone, Clarke, Dallas, Decatur, Dickinson, Humboldt and 6 more | 2 hr |
Nearby
Mesoscale Discussions in Iowa, 2007Every mesoscale discussion in 2007
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.