Alert archive / Illinois / Mesoscale Discussions in 2015

Mesoscale Discussion 133

March 23, 20154 states

The Storm Prediction Center issued this mesoscale discussion at Mar 23, 2015, 4:58 AM CDT for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Mar 23, 2015, 4:58 AM CDT (09:58 UTC)
Expired: Mar 23, 2015, 9:30 AM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 25 counties

Boone County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Will County, IL, Winnebago County, IL, Jasper County, IN, Lake County, IN, LaPorte County, IN, Newton County, IN, Porter County, IN, Pulaski County, IN, Starke County, IN, White County, IN, Berrien County, MI, Green County, WI, Rock County, WI, Walworth County, WI

The radar

The Chicago radar (KLOT), 24 km from the middle of the area, began a volume at 09:59 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
Mar 23, 12:47 AM CDT	Mesoscale Discussion	SPC	Boone, Carroll, DeKalb, Jo Daviess, Lee, McHenry and 3 more	4 hr

Nearby

Mesoscale Discussions in Illinois, 2015 Mesoscale Discussions in Indiana, 2015 Mesoscale Discussions in Wisconsin, 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.