FLUS43 KLOT 210954

HWOLOT



Hazardous Weather Outlook

National Weather Service Chicago/Romeoville IL

454 AM CDT Sun Jun 21 2026



ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-

010-011-019-221000-

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-

454 AM CDT Sun Jun 21 2026 /554 AM EDT Sun Jun 21 2026/



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 Thunderstorm Risk south of I-80...with an associated:

     Level 1 of 5 Tornado Risk.

     Level 1 of 5 Damaging Wind Risk...up to 60 mph.

  Elevated Flooding Risk.

  High Swim Risk Lake Michigan Beaches.



DISCUSSION...



Widespread soaking rainfall with localized corridors of torrential

rainfall may lead to flooding in some areas today. The greatest

likelihood of flooding is present near and south of I-88.



A few thunderstorms may also occur, especially well south of I-80,

where there is also a conditional threat for a few severe storms

south of a Pontiac, IL to Rensselaer, IN line.



Strengthening onshore winds will cause the threat for rip currents

at southern Lake Michigan beaches to ramp this evening and continue

through tonight.



.DAYS TWO THROUGH SEVEN...Monday through Saturday.



Monday...

  High Swim Risk Lake Michigan Beaches.

Tuesday night through Saturday...

  Limited Thunderstorm Risk.



DISCUSSION...



An elevated danger for rip currents at southern Lake Michigan

beaches will continue into Monday.



Periodic thunderstorm chances are currently forecasted Tuesday

night through Saturday.



.SPOTTER INFORMATION STATEMENT...



  Spotters may be needed well south of I-80 this afternoon and

  evening.



GENERAL STORM MOTION OF THE DAY:



  Moving toward the east at 30-40 mph.



$$



LMZ740>745-221000-

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-

454 AM CDT Sun Jun 21 2026



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...Today and Tonight.



Weather hazards expected...



  Hazardous conditions for small craft.

  Limited Thunderstorm Risk.



.DAYS TWO THROUGH SEVEN...Monday through Saturday.



Monday...

  Hazardous conditions for small craft are likely.

Wednesday through Saturday...

  Limited Thunderstorm Risk.



$$



Ogorek



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