Alert archive / Missouri / Mesoscale Discussions in 2015

Mesoscale Discussion 1816

September 18, 201515 counties in Illinois; 5 counties in Iowa; 18 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Sep 18, 2015, 5:20 PM CDT for 15 counties in Illinois; 5 counties in Iowa; 18 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Sep 18, 2015, 5:20 PM CDT (22:20 UTC)
Expired: Sep 18, 2015, 7:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 38 counties

Davis County, IA, Des Moines County, IA, Henry County, IA, Lee County, IA, Van Buren County, IA, Adams County, IL, Brown County, IL, Cass County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Knox County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Morgan County, IL, Pike County, IL, Schuyler County, IL, Scott County, IL, Warren County, IL, Adair County, MO, Audrain County, MO, Chariton County, MO, Clark County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Macon County, MO, Marion County, MO, Monroe County, MO, Pike County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO

The radar

The Quad Cities radar (KDVN), 162 km from the middle of the area, began a volume at 22:20 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
Sep 17, 7:54 PM CDT	Mesoscale Discussion	SPC	Des Moines, Henry, Jefferson, Lee, Louisa, Van Buren	66 min
Sep 17, 10:12 PM CDT	Mesoscale Discussion	SPC	Appanoose, Clarke, Decatur, Lucas, Monroe, Ringgold and 1 more	63 min
Sep 18, 9:25 AM CDT	Mesoscale Discussion	SPC	Adams, Cass, Fremont, Mills, Montgomery, Page and 4 more	65 min

Nearby

Mesoscale Discussions in Missouri, 2015 Mesoscale Discussions in Illinois, 2015 Mesoscale Discussions in Iowa, 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.