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Severe Thunderstorm Warning 0149
Issued by the Chicago Forecast Office

Action Issued Starts Expiration
New 2026-06-24 16:54:53 2026-06-24 16:54:00 2026-06-24 17:45:00
Continued 2026-06-24 17:11:54 2026-06-24 17:45:00
Continued 2026-06-24 17:24:09 2026-06-24 17:45:00
Continued 2026-06-24 17:39:55 2026-06-24 17:45:00
Expired 2026-06-24 17:46:55 2026-06-24 17:45:00

Action: New
Issued At: 2026-06-24 16:54:53 

632 
WUUS53 KLOT 242154
SVRLOT
ILC007-111-242245-
/O.NEW.KLOT.SV.W.0149.260624T2154Z-260624T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Chicago/Romeoville
454 PM CDT Wed Jun 24 2026

The National Weather Service in Chicago has issued a

* Severe Thunderstorm Warning for...
  Western McHenry County in northeastern Illinois...
  Boone County in north central Illinois...

* Until 545 PM CDT.

* At 454 PM CDT, severe thunderstorms were located along a line
  extending from near South Beloit to Loves Park to near Rockford,
  moving east at 35 mph.

  HAZARD...60 mph wind gusts and nickel size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Belvidere, Woodstock, Loves Park, Harvard, Marengo, Poplar Grove,
  Candlewick Lake, Cherry Valley, Sharon, Capron, Timberlane, Union,
  Garden Prairie, Chemung, and Caledonia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4249 8846 4228 8847 4215 8860 4215 8864
      4219 8894 4250 8894
TIME...MOT...LOC 2154Z 279DEG 31KT 4249 8898 4236 8899 4225 8910 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Yack
Action: Continued
Issued At: 2026-06-24 17:11:54 

251 
WWUS53 KLOT 242211
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
511 PM CDT Wed Jun 24 2026

ILC007-111-242245-
/O.CON.KLOT.SV.W.0149.000000T0000Z-260624T2245Z/
McHenry IL-Boone IL-
511 PM CDT Wed Jun 24 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR WESTERN MCHENRY AND BOONE COUNTIES...

At 511 PM CDT, severe thunderstorms were located along a line
extending from 6 miles south of Clinton to near Belvidere to near
Cherry Valley, moving east at 30 mph.

HAZARD...60 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Belvidere, Poplar Grove, and Capron around 515 PM CDT.
  Sharon around 520 PM CDT.
  Harvard and Marengo around 525 PM CDT.
  Woodstock around 540 PM CDT.

Other locations impacted by these severe thunderstorms include
Chemung, Garden Prairie, Union, and Caledonia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4249 8846 4228 8847 4215 8860 4215 8864
      4219 8894 4250 8894
TIME...MOT...LOC 2211Z 285DEG 28KT 4247 8888 4230 8882 4220 8894 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Izzi
Action: Continued
Issued At: 2026-06-24 17:24:09 

585 
WWUS53 KLOT 242223
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
523 PM CDT Wed Jun 24 2026

ILC007-111-242245-
/O.CON.KLOT.SV.W.0149.000000T0000Z-260624T2245Z/
McHenry IL-Boone IL-
523 PM CDT Wed Jun 24 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR WESTERN MCHENRY AND SOUTHEASTERN BOONE COUNTIES...

At 523 PM CDT, severe thunderstorms were located along a line
extending from near Capron to near Marengo to near Kingston, moving
east at 35 mph.

HAZARD...60 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Harvard and Marengo around 530 PM CDT.
  Woodstock around 535 PM CDT.

Other locations impacted by these severe thunderstorms include
Chemung, Garden Prairie, and Union.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4249 8846 4228 8847 4215 8860 4215 8864
      4219 8894 4226 8894 4228 8883 4236 8878
      4250 8881
TIME...MOT...LOC 2223Z 277DEG 29KT 4244 8873 4227 8868 4217 8880 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Izzi
Action: Continued
Issued At: 2026-06-24 17:39:55 

002 
WWUS53 KLOT 242239
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
539 PM CDT Wed Jun 24 2026

ILC007-111-242245-
/O.CON.KLOT.SV.W.0149.000000T0000Z-260624T2245Z/
McHenry IL-Boone IL-
539 PM CDT Wed Jun 24 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR WESTERN MCHENRY AND SOUTHERN BOONE COUNTIES...

At 539 PM CDT, severe thunderstorms were located along a line
extending from near Harvard to near Marengo to near Genoa, moving
east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Woodstock around 545 PM CDT.

Other locations impacted by these severe thunderstorms include
Chemung, Garden Prairie, and Union.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4249 8846 4228 8847 4215 8860 4215 8864
      4219 8894 4225 8876 4249 8870
TIME...MOT...LOC 2239Z 279DEG 31KT 4242 8857 4225 8852 4215 8864 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Yack
Action: Expired
Issued At: 2026-06-24 17:46:55 

330 
WWUS53 KLOT 242246
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
546 PM CDT Wed Jun 24 2026

ILC007-111-242256-
/O.EXP.KLOT.SV.W.0149.000000T0000Z-260624T2245Z/
McHenry IL-Boone IL-
546 PM CDT Wed Jun 24 2026

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN MCHENRY AND SOUTHERN
BOONE COUNTIES HAS EXPIRED...

The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
north central and northeastern Illinois.

Remember, a Severe Thunderstorm Warning still remains in effect for
eastern McHenry County until 630 PM CDT. 

&&

LAT...LON 4249 8846 4228 8847 4215 8860 4215 8864
      4219 8894 4225 8876 4249 8870
TIME...MOT...LOC 2246Z 270DEG 31KT 4241 8852 4224 8847 4214 8859 

$$

Yack

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