Alert archive / Missouri / Mesoscale Discussions in 2008

Mesoscale Discussion 1847

July 21, 200818 counties in Illinois; 35 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2008, 8:00 PM CDT for 18 counties in Illinois; 35 counties in Missouri. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jul 21, 2008, 8:00 PM CDT (01:00 UTC)
Expired: Jul 21, 2008, 9:30 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 53 counties

Bond County, IL, Calhoun County, IL, Christian County, IL, Clay County, IL, Clinton County, IL, Effingham County, IL, Fayette County, IL, Greene County, IL, Jasper County, IL, Jersey County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Montgomery County, IL, Moultrie County, IL, Saint Clair County, IL, Shelby County, IL, Audrain County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Callaway County, MO, Carroll County, MO, Chariton County, MO, City of Saint Louis, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, DeKalb County, MO, Franklin County, MO, Gasconade County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Lincoln County, MO, Livingston County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saint Charles County, MO, Saint Louis County, MO, Saline County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 130 km from the middle of the area, began a volume at 01:01 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 721Jul 21, 9:15 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
Jul 21, 7:16 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Cass, Fulton, Hancock, McDonough and 6 more	89 min
Jul 21, 7:20 PM CDT	Severe Thunderstorm Watch	SPC	Cass, Champaign, Christian, Clark, Coles, Cumberland and 26 more	7 hr
Jul 21, 9:14 PM CDT	Severe Thunderstorm Watch	SPC	Bond, Calhoun, Clay, Clinton, Crawford, Edwards and 22 more	6 hr
Jul 21, 10:38 PM CDT	Mesoscale Discussion	SPC	Bond, Calhoun, Christian, Clark, Clay, Clinton and 32 more	97 min
Jul 22, 4:47 AM CDT	Mesoscale Discussion	SPC	Alexander, Hardin, Jackson, Johnson, Massac, Pope and 5 more	88 min
Jul 22, 3:18 AM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Atchison, Audrain, Buchanan, Caldwell and 23 more	87 min
Jul 22, 9:34 AM CDT	Mesoscale Discussion	SPC	Boone, Camden, Cole, Cooper, Crawford, Dent and 12 more	56 min
Jul 22, 11:55 AM CDT	Mesoscale Discussion	SPC	Dunklin, Pemiscot	3 hr
Jul 22, 2:25 PM CDT	Mesoscale Discussion	SPC	Barry, Butler, Carter, Howell, Jasper, McDonald and 7 more	2 hr

Nearby

Mesoscale Discussions in Missouri, 2008 Mesoscale Discussions in Illinois, 2008 Every mesoscale discussion in 2008

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.