Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
126 AM CST Wed Mar 4 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-050730-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
126 AM CST Wed Mar 4 2026 /226 AM EST Wed Mar 4 2026/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Early this Morning through Tonight.

Weather hazards expected...

  Elevated Fog Risk early this morning.
  Limited Thunderstorm Risk tonight.

DISCUSSION...

Fog is expected early this morning across portions of northern
Illinois outside of Chicago, some of which is locally dense.

Scattered showers with embedded thunderstorms are possible late
tonight, mainly south of Interstate 80.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
  Limited Thunderstorm Risk.
  Limited Fog Risk.
Friday...
  Limited Thunderstorm Risk...with an associated:
     Level 2 of 5 Severe Thunderstorm Risk.
  Limited Fog Risk near Lake Michigan.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the northeast at 25 mph.

$$

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
652 AM CST Wed Mar 4 2026

ILZ003>006-008-010>012-103-041500-
/O.CON.KLOT.FG.Y.0005.000000T0000Z-260304T1500Z/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-Northern
Cook-
Including the cities of Evanston, Woodstock, Buffalo Grove,
Schaumburg, Elgin, Northbrook, Crystal Lake, Sycamore, Mundelein,
Palatine, Gurnee, Des Plaines, Rockford, Oregon, Byron,
Belvidere, Algonquin, Waukegan, Dixon, Rochelle, Aurora, McHenry,
and DeKalb
652 AM CST Wed Mar 4 2026

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS
MORNING...

* WHAT...Visibility one quarter mile or less in areas of dense fog.

* WHERE...Boone, De Kalb, Lee, Ogle, Winnebago, Kane, Lake IL,
  McHenry, and Northern Cook Counties.

* WHEN...Until 9 AM CST this morning.

* IMPACTS...Low visibility could make driving conditions hazardous.

* ADDITIONAL DETAILS...Patchy slick spots may be encountered on
  untreated elevated surfaces where temperatures are still at or
  below freezing in far northeastern Illinois.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

&&

$$

RC

Hazard Report Provided By forecast.weather.gov