Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
905 AM CST Fri Dec 5 2025

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-061515-
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-
905 AM CST Fri Dec 5 2025 /1005 AM EST Fri Dec 5 2025/

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

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Limited Ice Accumulation Risk.

DISCUSSION...

Patchy freezing drizzle or snow may lead to localized
slick spots late this evening and overnight.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday night through Thursday...
  Limited Snow Risk.

DISCUSSION...

A series of clipper systems moving across the Great Lakes may
bring regular opportunities for snow and travel impacts to the
local area this weekend through next week.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

$$

Hydrologic Outlook
ILC007-031-037-043-053-063-075-089-091-093-097-099-103-105-111-141-
197-201-INC007-073-089-111-127-051800-

Hydrologic Outlook
National Weather Service Chicago IL
209 PM CST Thu Dec 4 2025

...Risks for River Ice Formation and Isolated Ice Jams will continue
the next Few Days...

Very cold temperatures tonight will be favorable for additional ice
on rivers and tributaries. Reports from river ice spotters and river
gauges indicate that isolated areas of heavy river ice coverage have
already developed. While not likely, ice jams will be possible in
isolated areas along the Rock, Fox, Des Plaines, and Kankakee
rivers. Ice jams may cause rises on area rivers with little warning.

Despite warmer temperatures expected by this weekend, widespread
melting of river ice is not expected. As a result, most river ice
that develops this week will likely remain in place through early
next week.

This outlook means that elevated water levels and potential impacts
are possible, but not yet certain. Persons with interests along area
rivers should closely monitor the latest forecasts.

This product may be updated by tomorrow afternoon.
$$

WSL/Borchardt

Hazard Report Provided By forecast.weather.gov