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.

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 202022 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 222 PM CST Tue Jan 20 2026 /O.EXT.KLOT.WW.Y.0004.260121T0200Z-260121T1400Z/ Winnebago-Boone-McHenry-Lake IL- Including the cities of Woodstock, Mundelein, Algonquin, Waukegan, Gurnee, Buffalo Grove, McHenry, Rockford, Belvidere, and Crystal Lake 222 PM CST Tue Jan 20 2026 ...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 8 PM THIS EVENING TO 8 AM CST WEDNESDAY... * WHAT...Snow and hazardous travel conditions expected. Total snow accumulations between 3 and 5 inches. * WHERE...Boone, Winnebago, Lake IL, and McHenry Counties. * WHEN...From 8 PM this evening to 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 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/88973 Source: nwws © 2026 WxNotify. All rights reserved.

Winter Weather Advisory for McHenry Co., IL until 6:00 AM CST 1/21

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS43 KLOT 201503 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 903 AM CST Tue Jan 20 2026 /O.CON.KLOT.WW.Y.0004.260121T0200Z-260121T1200Z/ Winnebago-Boone-McHenry-Lake IL- Including the cities of Rockford, Woodstock, Crystal Lake, Buffalo Grove, McHenry, Mundelein, Gurnee, Belvidere, Algonquin, and Waukegan 903 AM CST Tue Jan 20 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 6 AM CST WEDNESDAY... * WHAT...Snow expected. Total snow accumulations between 2 and 5 inches, highest near the Wisconsin-Illinois state line. * WHERE...Boone, Winnebago, Lake IL, and McHenry Counties. * WHEN...From 8 PM this evening to 6 AM CST Wednesday. * IMPACTS...Be prepared for hazardous travel due to snow covered roads. The slippery conditions may also impact part of the Wednesday morning commute. 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/ilaew Source: nwws © 2026 WxNotify. All rights reserved.

Winter Weather Advisory for McHenry Co., IL until 6:00 AM CST 1/21

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS43 KLOT 201000 WSWLOT URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 400 AM CST Tue Jan 20 2026 /O.NEW.KLOT.WW.Y.0004.260121T0200Z-260121T1200Z/ Winnebago-Boone-McHenry-Lake IL- Including the cities of Buffalo Grove, Mundelein, Crystal Lake, Rockford, Belvidere, McHenry, Gurnee, Waukegan, Woodstock, and Algonquin 400 AM CST Tue Jan 20 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 6 AM CST WEDNESDAY... * WHAT...Snow expected. Total snow accumulations between 2 and 5 inches, highest near the Wisconsin-Illinois state line. * WHERE...Winnebago, Boone, McHenry, and Lake IL Counties. * WHEN...From 8 PM this evening to 6 AM CST Wednesday. * IMPACTS...Be prepared for hazardous travel due to snow covered roads. The slippery conditions may also impact part of the Wednesday morning commute. 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/s9m00 Source: emwin © 2026 WxNotify. All rights reserved.

Dense Fog Advisory Expiration for McHenry Co., IL

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 071559 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 959 AM CST Wed Jan 7 2026 /O.EXP.KLOT.FG.Y.0001.000000T0000Z-260107T1600Z/ McHenry-Lake IL-Kane-DuPage-Kendall-Northern Cook-Northern Will- Including the cities of Des Plaines, Naperville, Lombard, Waukegan, Palatine, Buffalo Grove, Gurnee, Joliet, Oswego, Bolingbrook, McHenry, Mundelein, Carol Stream, Northbrook, Mokena, Schaumburg, Downers Grove, Aurora, Algonquin, Yorkville, Wheaton, Plano, Elgin, Woodstock, Evanston, Crystal Lake, and Plainfield 959 AM CST Wed Jan 7 2026 ...DENSE FOG ADVISORY WILL EXPIRE AT 10 AM CST THIS MORNING... Lower visibilities will linger through noon, but dense fog is no longer a threat. https://p.wxn.io/roqnu Source: emwin © 2026 WxNotify. All rights reserved.

Dense Fog Advisory for McHenry Co., IL until 10:00 AM CST 1/7

WxNotify C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX WWUS73 KLOT 071350 NPWLOT URGENT - WEATHER MESSAGE National Weather Service Chicago IL 750 AM CST Wed Jan 7 2026 /O.EXA.KLOT.FG.Y.0001.000000T0000Z-260107T1600Z/ McHenry-Lake IL-Kane-DuPage-Kendall-Northern Cook-Northern Will- Including the cities of Des Plaines, Naperville, Lombard, Waukegan, Palatine, Buffalo Grove, Gurnee, Joliet, Oswego, Bolingbrook, McHenry, Mundelein, Carol Stream, Northbrook, Mokena, Schaumburg, Downers Grove, Aurora, Algonquin, Yorkville, Wheaton, Plano, Elgin, Woodstock, Evanston, Crystal Lake, and Plainfield 750 AM CST Wed Jan 7 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CST THIS MORNING... * WHAT...Visibility one quarter to one half mile in dense fog. * WHERE...DuPage, Kane, Kendall, Lake IL, McHenry, Northern Cook, and Northern Will Counties. * WHEN...Until 10 AM CST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...The combination of fog and temperatures below freezing may lead to slick spots. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && https://p.wxn.io/16ibw Source: nwws © 2026 WxNotify. All rights reserved.