Alert archive / Illinois / Mesoscale Discussions in 2012

Mesoscale Discussion 1984

September 25, 201227 counties in Illinois; 19 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Sep 25, 2012, 12:59 PM CDT for 27 counties in Illinois; 19 counties in Missouri. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Sep 25, 2012, 12:59 PM CDT (17:59 UTC)
Expired: Sep 25, 2012, 2:00 PM CDT
In force: 61 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 46 counties

Bond County, IL, Calhoun County, IL, Clay County, IL, Clinton County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Hamilton County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Perry County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Lincoln County, MO, Maries County, MO, Miller County, MO, Osage County, MO, Perry County, MO, Phelps County, MO, Pulaski County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 52 km from the middle of the area, began a volume at 18:01 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 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 25, 12:51 AM CDT	Mesoscale Discussion	SPC	Bond, Calhoun, Clay, Clinton, Crawford, Edwards and 33 more	114 min
Sep 25, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	Bond, Clinton, Edwards, Fayette, Franklin, Hamilton and 11 more	6 hr
Sep 25, 6:57 PM CDT	Mesoscale Discussion	SPC	Clinton, Edwards, Franklin, Gallatin, Hamilton, Jefferson and 11 more	93 min
Sep 25, 4:47 PM CDT	Mesoscale Discussion	SPC	Barry, Barton, Bates, Benton, Camden, Cedar and 16 more	88 min
Sep 25, 5:46 PM CDT	Severe Thunderstorm Watch	SPC	Barton, Benton, Camden, Cedar, Dade, Dallas and 12 more	4 hr

Nearby

Mesoscale Discussions in Illinois, 2012 Mesoscale Discussions in Missouri, 2012 Every mesoscale discussion in 2012

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.