Alert archive / Iowa / Mesoscale Discussions in 2015

Mesoscale Discussion 1986

November 20, 201524 counties in Iowa; 6 counties in Nebraska; 7 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Nov 20, 2015, 9:00 AM CST for 24 counties in Iowa; 6 counties in Nebraska; 7 counties in South Dakota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Nov 20, 2015, 9:00 AM CST (15:00 UTC)
Expired: Nov 20, 2015, 2:00 PM CST
In force: 5 hr
Issued by: the Storm Prediction Center

All 37 counties

Boone County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Greene County, IA, Hamilton County, IA, Humboldt County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Webster County, IA, Woodbury County, IA, Wright County, IA, Burt County, NE, Cedar County, NE, Dakota County, NE, Dixon County, NE, Thurston County, NE, Wayne County, NE, Bon Homme County, SD, Clay County, SD, Hutchinson County, SD, Lincoln County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 140 km from the middle of the area, began a volume at 14:59 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, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 20, 1:51 PM CST	Mesoscale Discussion	SPC	Audubon, Benton, Black Hawk, Boone, Bremer, Buchanan and 46 more	5 hr

Nearby

Mesoscale Discussions in Iowa, 2015 Mesoscale Discussions in South Dakota, 2015 Mesoscale Discussions in Nebraska, 2015 Every mesoscale discussion in 2015

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.