Alert archive / Illinois / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 97, NWS Chicago, IL

July 20, 20134 counties in Illinois

NWS Chicago, IL issued this severe thunderstorm warning at Jul 20, 2013, 7:39 PM CDT for 4 counties in Illinois. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 20, 2013, 7:39 PM CDT (00:39 UTC)
Expired: Jul 20, 2013, 8:45 PM CDT
In force: 66 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cook County, IL, DuPage County, IL, Kane County, IL, McHenry County, IL

The radar

The Chicago radar (KLOT), 45 km from the middle of the area, began a volume at 00:40 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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 20, 7:30 PM CDT, 9 minutes before

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The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 20, 7:30 PM CDT	Special Weather Statement	LOT	McHenry	45 min
Jul 20, 8:23 PM CDT	Areal Flood Advisory	LOT	Cook, Kane	4 hr
Jul 20, 8:30 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Kane, Kendall, Will	60 min
Jul 21, 5:41 AM CDT	Dense Fog Advisory	LOT	Ford, Iroquois, Livingston	3 hr
Jul 21, 4:32 PM CDT	Special Weather Statement	LOT	Lake	28 min
Jul 21, 5:06 PM CDT	Special Weather Statement	LOT	Lake	24 min
Jul 21, 6:36 PM CDT	Special Marine Warning	LOT		114 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2013 Every severe thunderstorm warning in 2013

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.