Alert archive / Illinois / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 28, NWS Chicago, IL

May 14, 2018DeKalb County, Kane County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at May 14, 2018, 4:23 PM CDT for DeKalb County, Kane County, Illinois. It was in force for 52 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: May 14, 2018, 4:23 PM CDT (21:23 UTC)
Expired: May 14, 2018, 5:15 PM CDT
In force: 52 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties DeKalb County, IL, Kane County, IL

The radar

The Chicago radar (KLOT), 55 km from the middle of the area, began a volume at 21:23 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 14, 2:54 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

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.

NWS Chicago, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at May 14, 2:16 PM CDT, 2 hours 7 minutes earlier.

Area forecast discussion, May 14, 2:16 PM CDT, 2 hours 7 minutes before

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Hazardous weather outlook, May 14, 3:05 PM CDT, 1 hour 18 minutes before

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In the hours before

Local storm report, May 14, 10:23 AM CDT, 6 hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1023 AM CDT MON MAY 14 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0714 AM     MARINE TSTM WIND 2 NNW BURNS HARBOR      41.65N 87.15W
05/14/2018  M60 MPH          PORTER             IN   C-MAN STATION

            MEASURED GUST TO 60 MPH.

&&

Local storm report, May 14, 12:22 PM CDT, 4 hours 1 minute before

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Special weather statement, May 14, 3:39 PM CDT, 44 minutes before

Special Weather Statement
National Weather Service Chicago/Romeoville Il
339 PM CDT MON MAY 14 2018

ILZ010-142100-
Lee IL-
339 PM CDT MON MAY 14 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN LEE COUNTY UNTIL 400
PM CDT...

At 339 PM CDT, Doppler radar was tracking a strong thunderstorm near
Deer Grove, or 8 miles southeast of Rock Falls, moving northeast at
40 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Harmon.

A severe thunderstorm watch remains in effect until 1000 PM CDT for
north central Illinois.

LAT...LON 4174 8963 4182 8954 4158 8937 4159 8963
TIME...MOT...LOC 2039Z 227DEG 33KT 4167 8962

BMD

Special weather statement, May 14, 3:50 PM CDT, 33 minutes before

Special Weather Statement
National Weather Service Chicago/Romeoville Il
350 PM CDT MON MAY 14 2018

ILZ011-012-142115-
Kane IL-De Kalb IL-
350 PM CDT MON MAY 14 2018

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL DE KALB AND
NORTHWESTERN KANE COUNTIES UNTIL 415 PM CDT...

At 349 PM CDT, Doppler radar was tracking a strong thunderstorm near
Cortland, or near Sycamore, moving northeast at 30 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
DeKalb, Elburn, Cortland, Maple Park, Lily Lake, Virgil and
Burlington.

A severe thunderstorm watch remains in effect until 1000 PM CDT for
north central and northeastern Illinois.

LAT...LON 4181 8873 4189 8879 4208 8851 4185 8836
TIME...MOT...LOC 2049Z 245DEG 27KT 4188 8868

BMD

Special weather statement, May 14, 3:57 PM CDT, 26 minutes before

Special Weather Statement
National Weather Service Chicago/Romeoville Il
357 PM CDT MON MAY 14 2018

ILZ008-142130-
Ogle IL-
357 PM CDT MON MAY 14 2018

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN OGLE COUNTY UNTIL 430 PM
CDT...

At 357 PM CDT, Doppler radar was tracking a strong thunderstorm near
Oregon, moving east at 25 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Rochelle, Oregon, Hillcrest, Stillman Valley and Davis Junction.

A severe thunderstorm watch remains in effect until 1000 PM CDT for
north central Illinois.

LAT...LON 4193 8934 4201 8936 4214 8910 4192 8903
TIME...MOT...LOC 2057Z 256DEG 23KT 4198 8927

BMD

Local storm report, May 14, 4:18 PM CDT, 5 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
May 14, 3:43 AM CDT	Special Weather Statement	LOT	Ogle	32 min
May 14, 4:42 AM CDT	Severe Thunderstorm Warning	LOT	Ogle, Winnebago	48 min
May 14, 5:09 AM CDT	Special Weather Statement	LOT	Boone, Lee, Ogle, Winnebago	36 min
May 14, 6:41 AM CDT	Areal Flood Advisory	LOT	Cook, DuPage	3 hr
May 14, 6:43 AM CDT	Areal Flood Warning	LOT	Lake	6 hr
May 14, 8:13 AM CDT	Special Weather Statement	LOT	Lee	32 min
May 14, 10:50 AM CDT	Marine Dense Fog Advisory	LOT		10 hr
May 14, 11:28 AM CDT	River Flood Warning	LOT	Lake	6 days
May 14, 11:28 AM CDT	River Flood Warning	LOT	Lake	11 days
May 14, 11:28 AM CDT	River Flood Warning	LOT	Lake	56 hr
May 14, 11:28 AM CDT	River Flood Warning	LOT	Cook	68 hr
May 14, 11:28 AM CDT	River Flood Warning	LOT	Kane, McHenry	46 hr
May 14, 11:28 AM CDT	River Flood Warning	LOT	Kane, Kendall	5 days
May 14, 11:42 AM CDT	River Flood Advisory	LOT	Cook	3 days
May 14, 11:42 AM CDT	River Flood Advisory	LOT	Cook	65 hr
May 14, 11:42 AM CDT	River Flood Advisory	LOT	Lake	45 hr
May 14, 3:39 PM CDT	Special Weather Statement	LOT	Lee	21 min
May 14, 3:50 PM CDT	Special Weather Statement	LOT	DeKalb, Kane	25 min
May 14, 3:57 PM CDT	Special Weather Statement	LOT	Ogle	33 min
May 14, 4:00 PM CDT	Severe Thunderstorm Warning	LOT	Lee	45 min
May 14, 5:29 PM CDT	Special Marine Warning	LOT		3 hr
May 14, 5:39 PM CDT	Special Weather Statement	LOT	DuPage	36 min
May 14, 6:10 PM CDT	Special Weather Statement	LOT	Cook, DuPage	20 min
May 14, 7:27 AM CDT	Special Weather Statement	LOT	Porter	33 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2018 Every severe thunderstorm warning in 2018

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.