Alert archive / Iowa / Mesoscale Discussions in 2007
Mesoscale Discussion 399
The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2007, 2:38 PM CDT for 35 counties in Iowa; 4 counties in Nebraska. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2007, 2:38 PM CDT (19:38 UTC)
- Expired
- Mar 31, 2007, 4:15 PM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
All 39 counties
Adair County, IA, Adams County, IA, Audubon County, IA, Boone County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Decatur County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Jasper 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, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Burt County, NE, Douglas County, NE, Sarpy County, NE, Washington County, NE
The radar
The Des Moines radar (KDMX), 71 km from the middle of the area, began a volume at 19:41 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, 7.6 hours before the alert went out and 154 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
- 523 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 252 m²/s²
- 0-3 km storm-relative helicity
- 288 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 |
|---|---|---|---|---|
| Mar 30, 11:44 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Cass, Clarke, Fremont, Mills and 6 more | 61 min |
| Mar 31, 10:30 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 46 more | 90 min |
| Mar 31, 11:38 AM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 50 more | 7 hr |
| Mar 31, 1:47 PM CDT | Tornado Watch | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 37 more | 7 hr |
Nearby
Mesoscale Discussions in Iowa, 2007Mesoscale Discussions in Nebraska, 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.