Alert archive / Iowa / Mesoscale Discussions in 2007
Mesoscale Discussion 300
The Storm Prediction Center issued this mesoscale discussion at Mar 21, 2007, 6:37 AM CDT for 42 counties in Iowa; 21 counties in Missouri. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Mar 21, 2007, 6:37 AM CDT (11:37 UTC)
- Expired
- Mar 21, 2007, 8:30 AM CDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 63 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Clarke 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, Hardin County, IA, Jasper County, IA, Keokuk County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Webster County, IA, Wright County, IA, Adair County, MO, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO
The radar
The Des Moines radar (KDMX), 69 km from the middle of the area, began a volume at 11:38 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, 11.6 hours before the alert went out and 205 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
- 697 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 118 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 21, 9:44 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Clarke, Dallas, Davis and 24 more | 2 hr |
| Mar 21, 10:24 AM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Benton, Black Hawk, Buchanan, Cedar, Clarke and 31 more | 5 hr |
| Mar 21, 12:30 PM CDT | Mesoscale Discussion | SPC | Clinton, Scott | 90 min |
| Mar 21, 12:58 PM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Lee, Van Buren | 62 min |
| Mar 21, 1:26 PM CDT | Mesoscale Discussion | SPC | Clinton, Jackson, Scott | 64 min |
| Mar 21, 4:57 PM CDT | Mesoscale Discussion | SPC | Crawford, Fremont, Harrison, Ida, Mills, Monona and 3 more | 63 min |
| Mar 21, 5:15 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 34 more | 7 hr |
Nearby
Mesoscale Discussions in Iowa, 2007Mesoscale Discussions in Missouri, 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.