Alert archive / Minnesota / Mesoscale Discussions in 2018
Mesoscale Discussion 1370
The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2018, 2:24 PM CDT for 27 counties in Iowa; 38 counties in Minnesota; 26 counties in Wisconsin. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2018, 2:24 PM CDT (19:24 UTC)
- Expired
- Aug 27, 2018, 4:00 PM CDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 95%
All 91 counties
Allamakee County, IA, Bremer County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Humboldt County, IA, Kossuth County, IA, Mitchell County, IA, Palo Alto County, IA, Pocahontas County, IA, Webster County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Anoka County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chisago 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, Houston County, MN, Isanti County, MN, Jackson County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Pine County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Winona County, MN, Wright County, MN, Ashland County, WI, Barron County, WI, Bayfield County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Crawford County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Iron County, WI, Jackson County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Washburn County, WI
The radar
The Minneapolis radar (KMPX), 99 km from the middle of the area, began a volume at 19:24 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 12:00Z, 7.4 hours before the alert went out and 100 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
- 1465 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 698 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 232 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.7
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 |
|---|---|---|---|---|
| Aug 27, 11:49 AM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Emmet, Ida and 11 more | 116 min |
| Aug 27, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cerro Gordo, Cherokee, Clay, Dickinson, Emmet and 14 more | 7 hr |
| Aug 26, 7:37 PM CDT | Tornado Watch | SPC | Big Stone, Clay, Traverse, Wilkin | 5 hr |
| Aug 26, 9:48 PM CDT | Severe Thunderstorm Watch | SPC | Becker, Beltrami, Cass, Clearwater, Hubbard, Itasca and 10 more | 6 hr |
| Aug 26, 10:55 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Big Stone, Cass, Clay, Clearwater and 16 more | 2 hr |
| Aug 27, 2:04 AM CDT | Mesoscale Discussion | SPC | Hubbard, Itasca, Saint Louis | 2 hr |
| Aug 27, 5:27 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Door, Florence, Forest, Juneau and 17 more | 2 hr |
| Aug 27, 6:01 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Calumet, Door, Florence, Forest, Kewaunee and 16 more | 7 hr |
Nearby
Mesoscale Discussions in Minnesota, 2018Mesoscale Discussions in Iowa, 2018Mesoscale Discussions in Wisconsin, 2018Every mesoscale discussion in 2018
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.