Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
406 AM CDT Thu Oct 23 2025

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-240915-
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-
406 AM CDT Thu Oct 23 2025 /506 AM EDT Thu Oct 23 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...

  Significant Frost and Freeze Risk tonight.

DISCUSSION...

Freezing temperatures are expected tonight away from Lake
Michigan and the core of the Chicago urban heat island. Some frost
is possible near the lake, mainly away from downtown Chicago.

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

Friday night...
  Elevated Frost Risk.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

$$

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
859 AM CDT Thu Oct 23 2025

ILZ006-103-INZ001-240000-
/O.CON.KLOT.FZ.W.0001.251024T0600Z-251024T1300Z/
Lake IL-Northern Cook-Lake IN-
Including the cities of Northbrook, Evanston, Gurnee,
Merrillville, Palatine, Gary, Buffalo Grove, Mundelein, Des
Plaines, Waukegan, Schaumburg, and Hammond
859 AM CDT Thu Oct 23 2025

...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 8 AM CDT FRIDAY...

* WHAT...Sub-freezing temperatures as low as 30 expected away from
  Lake Michigan.

* WHERE...In Illinois, Lake IL and Northern Cook Counties. In
  Indiana, Lake IN County.

* WHEN...From 1 AM to 8 AM CDT Friday.

* IMPACTS...Frost and freeze conditions could kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Hazard Report Provided By forecast.weather.gov