Alert archive / Minnesota / Mesoscale Discussions in 2017
Mesoscale Discussion 1271
The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2017, 9:10 PM CDT for 22 counties in Iowa; 44 counties in Minnesota; Pierce County, Wisconsin. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Jul 9, 2017, 9:10 PM CDT (02:10 UTC)
- Expired
- Jul 9, 2017, 10:15 PM CDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
All 67 counties
Allamakee County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Dickinson County, IA, Emmet County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Hancock County, IA, Howard County, IA, Humboldt County, IA, Kossuth County, IA, Mitchell County, IA, Palo Alto County, IA, Pocahontas County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Anoka County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Cottonwood County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Jackson County, MN, Kandiyohi County, MN, Le Sueur County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Pope County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Swift County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Winona County, MN, Wright County, MN, Yellow Medicine County, MN, Pierce County, WI
The radar
The Minneapolis radar (KMPX), 99 km from the middle of the area, began a volume at 02:13 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, 2.2 hours before the alert went out and 99 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
- 627 J/kg
- Mixed-layer CIN
- -187 J/kg
- Mixed-layer LCL
- 1764 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 222 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.6
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 |
|---|---|---|---|---|
| Jul 9, 9:40 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Butler, Cerro Gordo, Chickasaw and 22 more | 5 hr |
| Jul 9, 11:45 PM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 23 more | 60 min |
| Jul 10, 1:49 AM CDT | Mesoscale Discussion | SPC | Benton, Buchanan, Cedar, Clinton, Davis, Delaware and 26 more | 116 min |
| Jul 10, 2:43 AM CDT | Mesoscale Discussion | SPC | Butler, Franklin, Grundy, Hamilton, Hardin, Jasper and 7 more | 2 hr |
| Jul 10, 6:34 PM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Decatur, Van Buren, Wayne | 86 min |
| Jul 9, 7:05 PM CDT | Tornado Watch | SPC | Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 34 more | 7 hr |
Nearby
Mesoscale Discussions in Minnesota, 2017Mesoscale Discussions in Iowa, 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.