Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
230 PM CDT Thu Apr 16 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-171930-
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-
230 PM CDT Thu Apr 16 2026 /330 PM EDT Thu Apr 16 2026/

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

.DAY ONE...This afternoon and tonight.

Weather hazards expected...

  Limited Thunderstorm Risk this afternoon in northwestern Indiana.
  Significant Fog Risk.

DISCUSSION...

A thunderstorm or two may move across northwestern Indiana through
this evening.

Dense fog is expected to move inland from Lake Michigan after
sunset.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
  Significant Fog Risk in the morning.
  Elevated Flooding Risk.
  Significant Thunderstorm Risk...with an associated:
     Level 3 of 5 Severe Thunderstorm Risk.
Saturday night into Sunday morning:
  Elevated  frost and freeze Risk.

DISCUSSION...

A line of thunderstorms is expected to move across the area late
Friday afternoon through Friday night. Pockets of damaging winds,
damaging hail, and even a tornado may occur especially along and
west of Interstate 39.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the southeast at 25 mph.

$$

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
155 AM CDT Fri Apr 17 2026

ILZ005-006-103>106-108-INZ001-002-171500-
/O.CON.KLOT.FG.Y.0010.000000T0000Z-260417T1500Z/
McHenry-Lake IL-Northern Cook-Central Cook-Southern Cook-Northern
Will-Eastern Will-Lake IN-Porter-
Including the cities of Calumet City, Evanston, Gary, Crete, Oak
Park, Chicago, Algonquin, Orland Park, Schaumburg, Palatine,
Lemont, Chesterton, La Grange, Woodstock, Crystal Lake, Mokena,
Buffalo Grove, McHenry, Hammond, Mundelein, Oak Lawn, Peotone,
Merrillville, Park Forest, Valparaiso, Des Plaines, Gurnee,
Beecher, Waukegan, Cicero, Joliet, Northbrook, Plainfield, Oak
Forest, Portage, and Bolingbrook
155 AM CDT Fri Apr 17 2026

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT THIS
MORNING...

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

* WHERE...In Illinois, Central Cook, Eastern Will, Lake IL, McHenry,
  Northern Cook, Northern Will, and Southern Cook Counties. In
  Indiana, Lake IN and Porter Counties.

* WHEN...Until 10 AM CDT this morning.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

Hazard Report Provided By forecast.weather.gov