Extreme Cold Warning Expiration for McHenry Co., IL, Cold Weather Advisory for McHenry Co., IL until 9:00 AM CST 1/24

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 231804 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 1204 PM CST Fri Jan 23 2026 /O.EXP.KLOT.EC.W.0001.000000T0000Z-260123T1800Z/ /O.CON.KLOT.CW.Y.0002.000000T0000Z-260124T1500Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Northern Cook-Southern Cook-Northern Will-Southern Will-Eastern Will- Including the cities of Crystal Lake, Kankakee, Orland Park, Beecher, Belvidere, Calumet City, Byron, Mendota, Sycamore, DeKalb, Oregon, Bourbonnais, Park Forest, Fairbury, Yorkville, Wheaton, Elgin, Oswego, Northbrook, Bolingbrook, Crete, Oak Forest, Palatine, Lombard, Downers Grove, Pontiac, Woodstock, Algonquin, Dixon, Joliet, Marseilles, Wilmington, La Salle, Des Plaines, Carol Stream, Mundelein, Coal City, Manhattan, Buffalo Grove, Plano, Minooka, Evanston, Morris, Bradley, Schaumburg, Mokena, Peotone, Aurora, Dwight, Waukegan, Rockford, Streator, Ottawa, Channahon, Lemont, McHenry, Gurnee, Plainfield, Naperville, and Rochelle 1204 PM CST Fri Jan 23 2026 ...COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST SATURDAY... ...EXTREME COLD WARNING HAS EXPIRED... * WHAT...Very cold wind chills as low as 15 to 30 below expected. * WHERE...Portions of central, north central, and northeast Illinois. * WHEN...Until 9 AM CST Saturday. * IMPACTS...The dangerously cold wind chills as low as 30 below zero could cause frostbite on exposed skin in as little as 10 to 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Dress in layers including a hat, face mask, and gloves if you must go outside. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. && https://p.wxn.io/h6930 Source: nwws © 2026 WxNotify. All rights reserved.

Extreme Cold Warning for McHenry Co., IL until 12:00 PM CST 1/23, Cold Weather Advisory for McHenry Co., IL until 9:00 AM CST 1/24

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 230901 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 301 AM CST Fri Jan 23 2026 /O.CON.KLOT.EC.W.0001.000000T0000Z-260123T1800Z/ /O.CON.KLOT.CW.Y.0002.260123T1800Z-260124T1500Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Northern Cook-Southern Cook-Northern Will-Southern Will-Eastern Will- Including the cities of Kankakee, Wheaton, Mendota, Dwight, Oregon, Palatine, Belvidere, Sycamore, Bolingbrook, Manhattan, Evanston, Ottawa, Bourbonnais, Pontiac, Buffalo Grove, Naperville, McHenry, Plano, Fairbury, Wilmington, Schaumburg, Aurora, Mundelein, Mokena, Peotone, Plainfield, Des Plaines, Yorkville, Gurnee, Bradley, Byron, Carol Stream, Morris, Crete, Coal City, Beecher, Rockford, Downers Grove, Minooka, Rochelle, Lemont, Streator, Calumet City, Orland Park, Joliet, Lombard, Oak Forest, Marseilles, Dixon, Algonquin, Northbrook, DeKalb, Waukegan, La Salle, Park Forest, Oswego, Elgin, Channahon, Woodstock, and Crystal Lake 301 AM CST Fri Jan 23 2026 ...EXTREME COLD WARNING REMAINS IN EFFECT UNTIL NOON CST TODAY... ...COLD WEATHER ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 9 AM CST SATURDAY... * WHAT...For the Extreme Cold Warning, dangerously cold wind chills of 30 to 40 below zero expected. For the Cold Weather Advisory, bitterly cold wind chills of 15 to 30 below zero expected. * WHERE...Portions of central, north central, and northeast Illinois. * WHEN...For the Extreme Cold Warning, until noon CST today. For the Cold Weather Advisory, from noon today to 9 AM CST Saturday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as few as 10 minutes. * ADDITIONAL DETAILS...Coldest wind chills are expected across interior portions of northern Illinois. PRECAUTIONARY/PREPAREDNESS ACTIONS... Limit time outdoors. If you must go outdoors, dress in multiple layers including a hat, face mask, and gloves. To prevent water pipes from freezing, wrap, drain, or allow them to drip slowly. Make frequent checks on older family, friends, and neighbors. Keep pets indoors as much as possible. Ensure portable heaters are used correctly. Do not use generators or grills inside. && n/a Source: emwin © 2026 WxNotify. All rights reserved.

Extreme Cold Warning for McHenry Co., IL until 12:00 PM CST 1/23, Cold Weather Advisory for McHenry Co., IL until 9:00 AM CST 1/24

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 230245 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 845 PM CST Thu Jan 22 2026 /O.CON.KLOT.EC.W.0001.260123T0900Z-260123T1800Z/ /O.CON.KLOT.CW.Y.0002.260123T1800Z-260124T1500Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Northern Cook-Southern Cook-Northern Will-Southern Will-Eastern Will- Including the cities of Marseilles, Evanston, Rochelle, Elgin, Coal City, Oak Forest, Park Forest, Wilmington, Crete, Calumet City, Sycamore, Wheaton, Plainfield, Buffalo Grove, Kankakee, Mokena, Ottawa, Algonquin, Lemont, Orland Park, Belvidere, Yorkville, Bourbonnais, Morris, Rockford, Fairbury, Dwight, Downers Grove, Gurnee, Beecher, Crystal Lake, Schaumburg, Pontiac, McHenry, Woodstock, Bolingbrook, Oregon, DeKalb, Aurora, Des Plaines, Mendota, Streator, Oswego, Manhattan, Mundelein, Dixon, Northbrook, Bradley, Peotone, La Salle, Joliet, Channahon, Naperville, Plano, Carol Stream, Palatine, Byron, Minooka, Lombard, and Waukegan 845 PM CST Thu Jan 22 2026 ...EXTREME COLD WARNING REMAINS IN EFFECT FROM 3 AM TO NOON CST FRIDAY... ...COLD WEATHER ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO 9 AM CST SATURDAY... * WHAT...For the Extreme Cold Warning, dangerously cold wind chills of 30 to 40 below zero expected. For the Cold Weather Advisory, bitterly cold wind chills of 15 to 30 below zero expected. * WHERE...Portions of central, north central, and northeast Illinois. * WHEN...For the Extreme Cold Warning, from 3 AM to noon CST Friday. For the Cold Weather Advisory, from noon Friday to 9 AM CST Saturday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as few as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Limit time outdoors. If you must go outdoors, dress in multiple layers including a hat, face mask, and gloves. To prevent water pipes from freezing, wrap, drain, or allow them to drip slowly. Make frequent checks on older family, friends, and neighbors. Keep pets indoors as much as possible. Ensure portable heaters are used correctly. Do not use generators or grills inside. && https://p.wxn.io/1rb7z Source: emwin © 2026 WxNotify. All rights reserved.

Extreme Cold Warning for McHenry Co., IL until 12:00 PM CST 1/23, Cold Weather Advisory for McHenry Co., IL until 9:00 AM CST 1/24

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 222029 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 229 PM CST Thu Jan 22 2026 /O.CON.KLOT.EC.W.0001.260123T0900Z-260123T1800Z/ /O.CON.KLOT.CW.Y.0002.260123T1800Z-260124T1500Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Northern Cook-Southern Cook-Northern Will-Southern Will-Eastern Will- Including the cities of Rockford, Byron, Orland Park, Dwight, Kankakee, Lombard, Lemont, Bolingbrook, Fairbury, Waukegan, Oregon, Elgin, Des Plaines, McHenry, Palatine, Park Forest, Pontiac, Rochelle, Yorkville, Buffalo Grove, Morris, Crystal Lake, Belvidere, Oswego, DeKalb, Crete, Mendota, Wilmington, Channahon, Naperville, Woodstock, Calumet City, Plano, Beecher, Coal City, Mokena, Ottawa, Algonquin, Carol Stream, Gurnee, Oak Forest, Joliet, Sycamore, Peotone, Manhattan, Downers Grove, Minooka, Marseilles, Aurora, Bourbonnais, Streator, Mundelein, Bradley, Plainfield, Northbrook, Dixon, Evanston, Schaumburg, Wheaton, and La Salle 229 PM CST Thu Jan 22 2026 ...EXTREME COLD WARNING REMAINS IN EFFECT FROM 3 AM TO NOON CST FRIDAY... ...COLD WEATHER ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO 9 AM CST SATURDAY... * WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 30 to 40 below zero expected. For the Cold Weather Advisory, very cold wind chills as low as 15 to 30 below expected. * WHERE...Portions of central, north central, and northeast Illinois. * WHEN...For the Extreme Cold Warning, from 3 AM to noon CST Friday. For the Cold Weather Advisory, from noon Friday to 9 AM CST Saturday. * IMPACTS...Dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. * ADDITIONAL DETAILS...Coldest wind chills are expected across interior portions of northern Illinois. PRECAUTIONARY/PREPAREDNESS ACTIONS... Dress in layers including a hat, face mask, and gloves if you must go outside. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. && https://p.wxn.io/e1evg Source: nwws © 2026 WxNotify. All rights reserved.

Extreme Cold Warning for McHenry Co., IL until 12:00 PM CST 1/23, Cold Weather Advisory for McHenry Co., IL until 9:00 AM CST 1/24

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 221724 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 1124 AM CST Thu Jan 22 2026 /O.CON.KLOT.EC.W.0001.260123T0900Z-260123T1800Z/ /O.CON.KLOT.CW.Y.0002.260123T1800Z-260124T1500Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Northern Cook-Southern Cook-Northern Will-Southern Will-Eastern Will- Including the cities of Rockford, Byron, Orland Park, Dwight, Kankakee, Lombard, Lemont, Bolingbrook, Fairbury, Waukegan, Oregon, Elgin, Des Plaines, McHenry, Palatine, Park Forest, Pontiac, Rochelle, Yorkville, Buffalo Grove, Morris, Crystal Lake, Belvidere, Oswego, DeKalb, Crete, Mendota, Wilmington, Channahon, Naperville, Woodstock, Calumet City, Plano, Beecher, Coal City, Mokena, Ottawa, Algonquin, Carol Stream, Gurnee, Oak Forest, Joliet, Sycamore, Peotone, Manhattan, Downers Grove, Minooka, Marseilles, Aurora, Bourbonnais, Streator, Mundelein, Bradley, Plainfield, Northbrook, Dixon, Evanston, Schaumburg, Wheaton, and La Salle 1124 AM CST Thu Jan 22 2026 ...EXTREME COLD WARNING REMAINS IN EFFECT FROM 3 AM TO NOON CST FRIDAY... ...COLD WEATHER ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO 9 AM CST SATURDAY... * WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 30 to 40 below zero expected. For the Cold Weather Advisory, very cold wind chills as low as 15 to 30 below expected. * WHERE...Portions of central, north central, and northeast Illinois. * WHEN...For the Extreme Cold Warning, from 3 AM to noon CST Friday. For the Cold Weather Advisory, from noon Friday to 9 AM CST Saturday. * IMPACTS...Dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. * ADDITIONAL DETAILS...Coldest wind chills are expected across interior portions of northern Illinois. PRECAUTIONARY/PREPAREDNESS ACTIONS... Dress in layers including a hat, face mask, and gloves if you must go outside. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. && https://p.wxn.io/6oaus Source: nwws © 2026 WxNotify. All rights reserved.

Cold Weather Advisory for McHenry Co., IL until 9:00 AM CST 1/24, Extreme Cold Warning for McHenry Co., IL until 12:00 PM CST 1/23

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 221652 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 1052 AM CST Thu Jan 22 2026 /O.EXB.KLOT.CW.Y.0002.260123T1800Z-260124T1500Z/ /O.CON.KLOT.EC.W.0001.260123T0900Z-260123T1800Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Northern Cook-Southern Cook-Northern Will-Southern Will-Eastern Will- Including the cities of Rockford, Byron, Orland Park, Dwight, Kankakee, Lombard, Lemont, Bolingbrook, Fairbury, Waukegan, Oregon, Elgin, Des Plaines, McHenry, Palatine, Park Forest, Pontiac, Rochelle, Yorkville, Buffalo Grove, Morris, Crystal Lake, Belvidere, Oswego, DeKalb, Crete, Mendota, Wilmington, Channahon, Naperville, Woodstock, Calumet City, Plano, Beecher, Coal City, Mokena, Ottawa, Algonquin, Carol Stream, Gurnee, Oak Forest, Joliet, Sycamore, Peotone, Manhattan, Downers Grove, Minooka, Marseilles, Aurora, Bourbonnais, Streator, Mundelein, Bradley, Plainfield, Northbrook, Dixon, Evanston, Schaumburg, Wheaton, and La Salle 1052 AM CST Thu Jan 22 2026 ...EXTREME COLD WARNING REMAINS IN EFFECT FROM 3 AM TO NOON CST FRIDAY... ...COLD WEATHER ADVISORY IN EFFECT FROM NOON FRIDAY TO 9 AM CST SATURDAY... * WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 30 to 40 below zero expected. For the Cold Weather Advisory, very cold wind chills as low as 15 to 30 below expected. * WHERE...Portions of central, north central, and northeast Illinois. * WHEN...For the Extreme Cold Warning, from 3 AM to noon CST Friday. For the Cold Weather Advisory, from noon Friday to 9 AM CST Saturday. * IMPACTS...Dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Dress in layers including a hat, face mask, and gloves if you must go outside. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Residents of the city of Chicago can call 3 1 1 to request well being checks for elderly friends or family members, or for information on finding the nearest warming center. && https://p.wxn.io/qtssb Source: nwws © 2026 WxNotify. All rights reserved.

Extreme Cold Warning for McHenry Co., IL until 12:00 PM CST 1/23

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 220912 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 312 AM CST Thu Jan 22 2026 /O.UPG.KLOT.EC.A.0001.260123T0900Z-260123T1800Z/ /O.NEW.KLOT.EC.W.0001.260123T0900Z-260123T1800Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-La Salle-Kendall-Grundy-Kankakee-Livingston-Northern Cook-Southern Cook-Northern Will-Southern Will-Eastern Will- Including the cities of Aurora, Rockford, Marseilles, Oswego, Mokena, Bourbonnais, Belvidere, Mendota, Plano, Rochelle, Dwight, Bradley, Lombard, Morris, Palatine, Plainfield, Lemont, Oregon, Byron, Waukegan, Downers Grove, McHenry, Elgin, Park Forest, Wilmington, Northbrook, Crystal Lake, Peotone, Calumet City, Manhattan, Oak Forest, Buffalo Grove, Streator, Algonquin, Sycamore, Des Plaines, Dixon, Minooka, Evanston, Channahon, Gurnee, Fairbury, Pontiac, Beecher, Bolingbrook, Orland Park, Mundelein, DeKalb, Joliet, Coal City, Wheaton, Carol Stream, Ottawa, Schaumburg, Yorkville, Crete, Woodstock, Kankakee, Naperville, and La Salle 312 AM CST Thu Jan 22 2026 ...EXTREME COLD WARNING IN EFFECT FROM 3 AM TO NOON CST FRIDAY... * WHAT...Dangerously cold wind chills between 30 and 40 below expected. * WHERE...Portions of central, north central, and northeast Illinois. * WHEN...From 3 AM to noon CST Friday. * IMPACTS...Dangerously cold wind chills as low as 35 below zero could cause frostbite on exposed skin in as little as 10 minutes. * ADDITIONAL DETAILS...Coldest wind chills are expected across interior portions of northern Illinois. PRECAUTIONARY/PREPAREDNESS ACTIONS... Dress in layers including a hat, face mask, and gloves if you must go outside. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. && https://p.wxn.io/2x54c Source: emwin © 2026 WxNotify. All rights reserved.

Extreme Cold Watch for McHenry Co., IL until 12:00 PM CST 1/23

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 220603 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 1203 AM CST Thu Jan 22 2026 /O.CON.KLOT.EC.A.0001.260123T0900Z-260123T1800Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage- Kendall-Northern Cook-Central Cook-Southern Cook-Northern Will- Southern Will-Eastern Will- Including the cities of Aurora, Rockford, Oswego, Mokena, Belvidere, Plano, Rochelle, Lombard, Palatine, Plainfield, Lemont, Oregon, Oak Lawn, Byron, Waukegan, Downers Grove, McHenry, Elgin, Park Forest, Wilmington, Northbrook, Crystal Lake, Peotone, Calumet City, Manhattan, Oak Forest, Buffalo Grove, Algonquin, Sycamore, Des Plaines, Cicero, Dixon, Evanston, Chicago, Channahon, Gurnee, Beecher, Bolingbrook, Orland Park, Mundelein, DeKalb, Joliet, Oak Park, Wheaton, Carol Stream, Schaumburg, La Grange, Yorkville, Crete, Woodstock, and Naperville 1203 AM CST Thu Jan 22 2026 ...EXTREME COLD WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY MORNING... * WHAT...Dangerously cold wind chills as low as 35 below possible. * WHERE...Portions of north central and northeast Illinois. * WHEN...From late tonight through Friday morning. * IMPACTS...The dangerously cold wind chills as low as 35 below zero could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Dress in layers including a hat, face mask, and gloves if you must go outside. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside. && https://p.wxn.io/41j2a Source: nwws © 2026 WxNotify. All rights reserved.

Extreme Cold Watch for McHenry Co., IL until 12:00 PM CST 1/23

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 220209 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 809 PM CST Wed Jan 21 2026 /O.CON.KLOT.EC.A.0001.260123T0900Z-260123T1800Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage- Kendall-Northern Cook-Central Cook-Southern Cook-Northern Will- Southern Will-Eastern Will- Including the cities of Wheaton, Calumet City, Orland Park, Peotone, Oak Forest, Buffalo Grove, Woodstock, Des Plaines, Lemont, Channahon, Oak Lawn, Rockford, Byron, Belvidere, Schaumburg, Gurnee, Aurora, Yorkville, Oak Park, McHenry, Mokena, Crystal Lake, Northbrook, Oswego, Beecher, DeKalb, Cicero, Sycamore, Naperville, Mundelein, Carol Stream, Palatine, Joliet, Algonquin, Oregon, Waukegan, Plainfield, Bolingbrook, Elgin, Dixon, Park Forest, Crete, Downers Grove, Lombard, Manhattan, Rochelle, Evanston, Chicago, Plano, La Grange, and Wilmington 809 PM CST Wed Jan 21 2026 ...EXTREME COLD WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY MORNING... * WHAT...Dangerously cold wind chills as low as 30 below possible. * WHERE...Portions of north central and northeast Illinois. * WHEN...From late Thursday night through Friday morning. * IMPACTS...The dangerously cold wind chills as low as 35 below zero could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Dress in layers including a hat, face mask, and gloves if you must go outside. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside. && https://p.wxn.io/7jbsh Source: nwws © 2026 WxNotify. All rights reserved.

Extreme Cold Watch for McHenry Co., IL until 12:00 PM CST 1/23

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 212242 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 442 PM CST Wed Jan 21 2026 /O.CON.KLOT.EC.A.0001.260123T0900Z-260123T1800Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage- Kendall-Northern Cook-Central Cook-Southern Cook-Northern Will- Southern Will-Eastern Will- Including the cities of Wheaton, Calumet City, Orland Park, Peotone, Oak Forest, Buffalo Grove, Woodstock, Des Plaines, Lemont, Channahon, Oak Lawn, Rockford, Byron, Belvidere, Schaumburg, Gurnee, Aurora, Yorkville, Oak Park, McHenry, Mokena, Crystal Lake, Northbrook, Oswego, Beecher, DeKalb, Cicero, Sycamore, Naperville, Mundelein, Carol Stream, Palatine, Joliet, Algonquin, Oregon, Waukegan, Plainfield, Bolingbrook, Elgin, Dixon, Park Forest, Crete, Downers Grove, Lombard, Manhattan, Rochelle, Evanston, Chicago, Plano, La Grange, and Wilmington 442 PM CST Wed Jan 21 2026 ...EXTREME COLD WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY MORNING... * WHAT...Dangerously cold wind chills as low as 35 below possible. * WHERE...Portions of north central and northeast Illinois. * WHEN...From late Thursday night through Friday morning. * IMPACTS...The dangerously cold wind chills as low as 35 below zero could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Dress in layers including a hat, face mask, and gloves if you must go outside. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside. && https://p.wxn.io/m2ix4 Source: nwws © 2026 WxNotify. All rights reserved.

Winter Weather Advisory Cancellation for McHenry Co., IL

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS43 KLOT 210850 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 250 AM CST Wed Jan 21 2026 /O.CAN.KLOT.WW.Y.0004.000000T0000Z-260121T1400Z/ Winnebago-Boone-McHenry-Lake IL-Ogle-De Kalb-Kane-DuPage-Northern Cook-Central Cook- Including the cities of Carol Stream, Cicero, Rockford, Naperville, Des Plaines, Downers Grove, Northbrook, Sycamore, Byron, Evanston, Elgin, Aurora, Schaumburg, Chicago, Rochelle, Lombard, Gurnee, Waukegan, Oregon, McHenry, Oak Park, Mundelein, Palatine, Belvidere, Crystal Lake, DeKalb, Oak Lawn, La Grange, Woodstock, Algonquin, Buffalo Grove, and Wheaton 250 AM CST Wed Jan 21 2026 ...WINTER WEATHER ADVISORY IS CANCELLED... The heavy band of snow has lifted north of the Wisconsin state line. While snow may redevelop early this morning, accumulations are expected to remain under half an inch. Slick spots will remain possible through the start of the morning commute where roads remain partially snow covered and where any additional snow falls. https://p.wxn.io/h0d9h Source: nwws © 2026 WxNotify. All rights reserved.

Winter Weather Advisory for McHenry Co., IL until 8:00 AM CST 1/21

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS43 KLOT 210359 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 959 PM CST Tue Jan 20 2026 /O.CON.KLOT.WW.Y.0004.000000T0000Z-260121T1400Z/ Winnebago-Boone-McHenry-Lake IL- Including the cities of Mundelein, Waukegan, Algonquin, Belvidere, Gurnee, Buffalo Grove, Rockford, McHenry, Woodstock, and Crystal Lake 959 PM CST Tue Jan 20 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM CST WEDNESDAY... * WHAT...Snow and hazardous travel conditions expected. Total snow accumulations between 2 and 5 inches. * WHERE...Boone, Winnebago, Lake IL, and McHenry Counties. * WHEN...Until 8 AM CST Wednesday. * IMPACTS...Plan on snow covered, slick road conditions, and periods of low visibility. The hazardous conditions will likely impact the Wednesday morning commute, especially in the northern Chicago metro area. * ADDITIONAL DETAILS...A heavier snow band is expected to develop late this evening into the overnight. If a long enough period of heavier snowfall rates occurs, localized snowfall amounts may reach upwards of 5 inches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Illinois can be obtained at www.gettingaroundillinois.com. && https://p.wxn.io/z2b7y Source: nwws © 2026 WxNotify. All rights reserved.