859
FLUS43 KLOT 160235
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
935 PM CDT Tue Jul 15 2025

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-170245-
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-
935 PM CDT Tue Jul 15 2025 /1035 PM EDT Tue Jul 15 2025/

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

.DAY ONE...Tonight.

  No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
  Elevated Thunderstorm Risk...with an associated:
     Level 2 of 5 Severe Thunderstorm Risk.
     Level 2 of 4 Flash Flooding Risk.
  Limited Excessive Heat Risk.
Thursday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk.
  High Swim Risk Lake Michigan Beaches.
Friday...
  High Swim Risk Lake Michigan Beaches.
Saturday through Monday...
  Limited to Elevated Flooding Risk.
  Limited to Elevated Thunderstorm Risk.

DISCUSSION...

Scattered severe storms are possible Wednesday afternoon with
damaging winds and damaging hail as the main threats. Flash
flooding may also occur, particularly where thunderstorms move
over the same areas.

High waves will cause dangerous swimming conditions at Lake
Michigan beaches Thursday through Friday.

There will be periodic bouts of showers and thunderstorms
Saturday through Monday. Any storm during this period may be
severe with damaging winds and flash flooding.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

$$

LMZ740>745-170245-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
935 PM CDT Tue Jul 15 2025

This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.

.DAY ONE...Tonight.

  No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
  Elevated Thunderstorm Risk...with an associated:
  Level 2 of 5 Severe Thunderstorm Risk.
Thursday and Friday...
  Hazardous conditions for small craft are likely.
  Limited Thunderstorm Risk.
Saturday through Monday...
  Limited to Elevated Thunderstorm Risk.

$$

KJB

Visit us at www.weather.gov/chicago