Alert archive / Iowa / Mesoscale Discussions in 2017
Mesoscale Discussion 259
The Storm Prediction Center issued this mesoscale discussion at Mar 6, 2017, 6:11 PM CST for 63 counties in Iowa; 28 counties in Minnesota; 7 counties in Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 6, 2017, 6:11 PM CST (00:11 UTC)
- Expired
- Mar 6, 2017, 8:15 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 98 counties
Adair County, IA, Adams County, IA, Allamakee County, IA, Appanoose County, IA, Audubon County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cass County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clarke County, IA, Clayton County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Delaware County, IA, Fayette 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, Howard County, IA, Humboldt County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Linn County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mitchell County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Poweshiek County, IA, Ringgold 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, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Anoka County, MN, Benton County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Isanti County, MN, Kanabec County, MN, Le Sueur County, MN, Mille Lacs County, MN, Mower County, MN, Olmsted County, MN, Pine County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Winona County, MN, Wright County, MN, Buffalo County, WI, Burnett County, WI, Dunn County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Saint Croix County, WI
The radar
The Des Moines radar (KDMX), 158 km from the middle of the area, began a volume at 00:13 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
Minneapolis, MN (KMPX), launched 00:00Z, 0.2 hours before the alert went out and 191 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
- 923 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 993 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 432 m²/s²
- 0-3 km storm-relative helicity
- 528 m²/s²
- Significant tornado parameter
- 2.2
- Supercell composite
- 10.3
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 6, 7:42 PM CST | Mesoscale Discussion | SPC | Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 40 more | 63 min |
| Mar 6, 8:22 PM CST | Mesoscale Discussion | SPC | Lee | 2 hr |
| Mar 6, 8:52 PM CST | Tornado Watch | SPC | Cedar, Clinton, Des Moines, Dubuque, Henry, Jackson and 5 more | 6 hr |
| Mar 6, 7:00 PM CST | Mesoscale Discussion | SPC | Pine | 2 hr |
| Mar 6, 7:42 PM CST | Severe Thunderstorm Watch | SPC | Adams, Columbia, Crawford, Dane, Grant, Green and 11 more | 5 hr |
| Mar 6, 10:15 PM CST | Mesoscale Discussion | SPC | Dane, Dodge, Jefferson, Rock, Walworth | 60 min |
| Mar 6, 10:35 PM CST | Severe Thunderstorm Watch | SPC | Dodge, Fond du Lac, Green Lake, Jefferson, Kenosha, Milwaukee and 7 more | 4 hr |
Nearby
Mesoscale Discussions in Iowa, 2017Mesoscale Discussions in Minnesota, 2017Mesoscale Discussions in Wisconsin, 2017Every mesoscale discussion in 2017
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.