Alert archive / Iowa / Mesoscale Discussions in 2020

Mesoscale Discussion 1885

December 29, 202013 counties in Illinois; 32 counties in Iowa; 4 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Dec 29, 2020, 2:17 PM CST for 13 counties in Illinois; 32 counties in Iowa; 4 counties in Wisconsin. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Dec 29, 2020, 2:17 PM CST (20:17 UTC)
Expired: Dec 29, 2020, 6:15 PM CST
In force: 4 hr
Issued by: the Storm Prediction Center
Concerning: Heavy snow

All 49 counties

Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Cedar County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Grundy County, IA, Hardin County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Louisa County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Scott County, IA, Story County, IA, Tama County, IA, Warren County, IA, Washington County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, DeKalb County, IL, Henry County, IL, Jo Daviess County, IL, Lee County, IL, Mercer County, IL, Ogle County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL, Winnebago County, IL, Grant County, WI, Green County, WI, Lafayette County, WI, Rock County, WI

The radar

The Quad Cities radar (KDVN), 72 km from the middle of the area, began a volume at 20:17 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 text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 29, 3:52 PM CST	Mesoscale Discussion	SPC	Cook, DuPage, Grundy, Kane, Kankakee, Kendall and 5 more	4 hr
Dec 29, 10:02 AM CST	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Carroll and 37 more	5 hr

Nearby

Mesoscale Discussions in Iowa, 2020 Mesoscale Discussions in Illinois, 2020 Mesoscale Discussions in Wisconsin, 2020 Every 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; radar from the NEXRAD Level II archive.