Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
605 FZUS53 KLOT 200238 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 938 PM CDT Sat Apr 19 2025 For waters within five nautical miles of shore on Lake Michigan Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the waves, along with the average height of the highest 10 percent of the waves which will occasionally be encountered. LMZ740-741-201200- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- 938 PM CDT Sat Apr 19 2025 ...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... .REST OF TONIGHT...Southeast winds 5 to 10 kt becoming east 10 to 15 kt before daybreak. Mostly cloudy. Waves 1 to 2 ft. .SUNDAY...East winds 10 to 20 kt increasing to 15 to 25 kt late. Scattered showers. Waves 1 to 2 ft building to 3 to 5 ft late. .SUNDAY NIGHT...East winds 15 to 25 kt becoming southeast overnight and then south late. Periods of showers and scattered thunderstorms. Waves 4 to 6 ft occasionally to 8 ft. A small craft advisory will likely be needed. .MONDAY...Southwest gales to 35 kt becoming west in the afternoon. Scattered showers in the morning. Waves 3 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. $$ LMZ742>745-201200- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 938 PM CDT Sat Apr 19 2025 ...GALE WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... .REST OF TONIGHT...Variable winds 5 to 10 kt becoming east and then increasing to 10 to 15 kt before daybreak. Mostly cloudy. Waves 1 to 2 ft. .SUNDAY...East winds 10 to 15 kt increasing to 15 to 20 kt. Scattered showers. Waves 1 to 2 ft building to 2 to 4 ft. .SUNDAY NIGHT...East winds 15 to 25 kt becoming southeast overnight. Scattered showers with isolated thunderstorms in the evening, then periods of showers and scattered thunderstorms overnight. Waves 2 to 4 ft. .MONDAY...Southwest gales to 35 kt becoming west in the afternoon. Isolated showers in the morning. Waves 2 to 4 ft building to 3 to 5 ft. $$ DK