Alert archive / Wisconsin / Mesoscale Discussions in 2020
Mesoscale Discussion 1609
The Storm Prediction Center issued this mesoscale discussion at Aug 28, 2020, 6:59 AM CDT for 11 counties in Iowa; 9 counties in Minnesota; 13 counties in Wisconsin. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Aug 28, 2020, 6:59 AM CDT (11:59 UTC)
- Expired
- Aug 28, 2020, 8:30 AM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 462
All 33 counties
Allamakee County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Floyd County, IA, Hancock County, IA, Howard County, IA, Kossuth County, IA, Mitchell County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN, Barron County, WI, Buffalo County, WI, Chippewa County, WI, Clark County, WI, Dunn County, WI, Eau Claire County, WI, Jackson County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Saint Croix County, WI, Trempealeau County, WI
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 12.0 hours before the alert went out and 129 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
- 487 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 1571 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 |
|---|---|---|---|---|
| Aug 28, 1:28 AM CDT | Mesoscale Discussion | SPC | Dickinson, Emmet, Lyon, Osceola, Winnebago | 92 min |
| Aug 28, 2:56 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Allamakee, Appanoose, Audubon, Benton and 53 more | 64 min |
| Aug 28, 3:16 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Black Hawk, Buchanan, Cedar, Clayton, Clinton and 19 more | 4 hr |
| Aug 28, 5:29 PM CDT | Mesoscale Discussion | SPC | Appanoose, Clinton, Davis, Des Moines, Henry, Jefferson and 8 more | 91 min |
| Aug 27, 11:30 PM CDT | Mesoscale Discussion | SPC | Lincoln, Pipestone, Rock | 2 hr |
| Aug 28, 1:54 AM CDT | Severe Thunderstorm Watch | SPC | Anoka, Blue Earth, Brown, Carver, Chippewa, Cottonwood and 36 more | 7 hr |
| Aug 28, 4:04 AM CDT | Mesoscale Discussion | SPC | Anoka, Blue Earth, Brown, Carver, Chippewa, Cottonwood and 31 more | 86 min |
Nearby
Mesoscale Discussions in Wisconsin, 2020Mesoscale Discussions in Iowa, 2020Mesoscale Discussions in Minnesota, 2020Every mesoscale discussion in 2020
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.