Alert archive / Minnesota / Mesoscale Discussions in 2020
Mesoscale Discussion 1865
The Storm Prediction Center issued this mesoscale discussion at Dec 23, 2020, 12:33 PM CST for 13 counties in Iowa; 24 counties in Minnesota; 6 counties in Wisconsin. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 23, 2020, 12:33 PM CST (18:33 UTC)
- Expired
- Dec 23, 2020, 4:30 PM CST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Blizzard
All 43 counties
Calhoun County, IA, Cerro Gordo County, IA, Hancock County, IA, Humboldt County, IA, Kossuth County, IA, Mitchell County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Aitkin County, MN, Anoka County, MN, Blue Earth County, MN, Carlton County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Lake County, MN, Le Sueur County, MN, Mower County, MN, Pine County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Steele County, MN, Waseca County, MN, Washington County, MN, Burnett County, WI, Douglas County, WI, Pierce County, WI, Polk County, WI, Saint Croix County, WI, Washburn County, WI
The radar
The Minneapolis radar (KMPX), 59 km from the middle of the area, began a volume at 18:38 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 nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 6.6 hours before the alert went out and 388 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
- 518 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
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 |
|---|---|---|---|---|
| Dec 23, 9:38 AM CST | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Emmet, Lyon and 5 more | 5 hr |
| Dec 23, 5:15 PM CST | Mesoscale Discussion | SPC | Kossuth, Winnebago | 6 hr |
| Dec 23, 7:42 AM CST | Mesoscale Discussion | SPC | Big Stone, Grant, Lac qui Parle, Stevens, Traverse | 5 hr |
Nearby
Mesoscale Discussions in Minnesota, 2020Mesoscale Discussions in Iowa, 2020Mesoscale Discussions in Wisconsin, 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; radar from the NEXRAD Level II archive.