Alert archive / Illinois / Mesoscale Discussions in 2004

Mesoscale Discussion 1877

August 4, 200438 counties in Illinois; 24 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Aug 4, 2004, 3:52 AM CDT for 38 counties in Illinois; 24 counties in Missouri. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Aug 4, 2004, 3:52 AM CDT (08:52 UTC)
Expired: Aug 4, 2004, 4:45 AM CDT
In force: 53 min
Issued by: the Storm Prediction Center

All 62 counties

Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Coles County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Ford County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Iroquois County, IL, Jersey County, IL, Kankakee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Peoria County, IL, Piatt County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Tazewell County, IL, Vermilion County, IL, Woodford County, IL, Adair County, MO, Audrain County, MO, Boone County, MO, Callaway County, MO, Chariton County, MO, Clark County, MO, Cooper County, MO, Howard County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Linn County, MO, Macon County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Pettis County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saline County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO

The radar

The St Louis radar (KLSX), 105 km from the middle of the area, began a volume at 08:56 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
Aug 3, 7:38 PM CDT	Mesoscale Discussion	SPC	Bureau, Cook, DeKalb, DuPage, Ford, Grundy and 14 more	67 min
Aug 3, 7:55 PM CDT	Severe Thunderstorm Watch	SPC	Boone, Bureau, Cook, DeKalb, DuPage, Ford and 21 more	5 hr
Aug 3, 8:19 PM CDT	Mesoscale Discussion	SPC	Carroll, Henry, Jo Daviess, Knox, Mercer, Rock Island and 2 more	56 min
Aug 3, 9:45 PM CDT	Severe Thunderstorm Watch	SPC	Fulton, Hancock, Henderson, Henry, Knox, McDonough and 3 more	5 hr
Aug 3, 9:52 PM CDT	Mesoscale Discussion	SPC	Cook, DuPage, Grundy, Kane, Kendall, Lake and 3 more	53 min
Aug 3, 10:38 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Greene, Jersey and 3 more	67 min
Aug 3, 11:30 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Calhoun, Cass, Champaign, Christian and 32 more	6 hr
Aug 4, 1:42 AM CDT	Mesoscale Discussion	SPC	Fulton, Henderson, Jersey, Livingston, McDonough, Mason and 5 more	2 hr
Aug 4, 3:39 PM CDT	Mesoscale Discussion	SPC	Hardin, Massac, Pope	96 min
Aug 3, 11:34 PM CDT	Mesoscale Discussion	SPC	Clark, Putnam, Schuyler, Scotland	86 min

Nearby

Mesoscale Discussions in Illinois, 2004 Mesoscale Discussions in Missouri, 2004 Every mesoscale discussion in 2004

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.