Alert archive / Illinois / Mesoscale Discussions in 2009

Mesoscale Discussion 819

May 13, 200921 counties in Illinois; 12 counties in Iowa; 11 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 13, 2009, 7:05 PM CDT for 21 counties in Illinois; 12 counties in Iowa; 11 counties in Missouri. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: May 13, 2009, 7:05 PM CDT (00:05 UTC)
Expired: May 13, 2009, 8:30 PM CDT
In force: 85 min
Issued by: the Storm Prediction Center

All 44 counties

Cedar County, IA, Clinton County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Adams County, IL, Brown County, IL, Cass County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Knox County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Mercer County, IL, Morgan County, IL, Peoria County, IL, Pike County, IL, Rock Island County, IL, Schuyler County, IL, Scott County, IL, Stark County, IL, Warren County, IL, Audrain County, MO, Clark County, MO, Knox County, MO, Lewis County, MO, Macon County, MO, Marion County, MO, Monroe County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Shelby County, MO

The radar

The Quad Cities radar (KDVN), 163 km from the middle of the area, began a volume at 00:05 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 299May 13, 9:55 PM CDT

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
May 13, 8:35 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Brown, Bureau, Carroll, Cass and 47 more	85 min
May 13, 9:56 PM CDT	Severe Thunderstorm Watch	SPC	Bond, Calhoun, Cass, Christian, Clark, Clay and 27 more	6 hr
May 13, 10:17 PM CDT	Mesoscale Discussion	SPC	Champaign, Cook, DeKalb, DeWitt, Douglas, DuPage and 23 more	58 min
May 13, 10:51 PM CDT	Severe Thunderstorm Watch	SPC	Champaign, Cook, DeWitt, DuPage, Ford, Grundy and 12 more	4 hr
May 13, 11:27 PM CDT	Mesoscale Discussion	SPC	Alexander, Bond, Calhoun, Clark, Clay, Clinton and 36 more	93 min
May 14, 1:01 AM CDT	Severe Thunderstorm Watch	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	5 hr
May 13, 8:22 PM CDT	Mesoscale Discussion	SPC	Barry, Barton, Benton, Camden, Cedar, Christian and 30 more	53 min

Nearby

Mesoscale Discussions in Illinois, 2009 Mesoscale Discussions in Iowa, 2009 Mesoscale Discussions in Missouri, 2009 Every mesoscale discussion in 2009

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.