| NWS Forecast for: Calumet Harbor IL to Gary IN (LMZ743) Issued by: National Weather Service Chicago, IL Last Update: 325 AM CDT Sat Mar 21 2026 | |
| Today: East winds around 10 kt gradually veering southwest and increasing to 15 to 25 kt through the day. Mostly cloudy in the morning then clearing. Waves 1 to 3 ft. Tonight: Southwest winds 15 to 20 kt becoming west 10 to 15 kt overnight. Mostly clear in the evening, then becoming partly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft. Sunday: North winds 20 to 25 kt increasing to 30 kt with a few gale force gusts to 35 kt. Patchy fog. Chance of rain. Waves 4 to 6 ft occasionally to 8 ft building to 8 to 11 ft occasionally to 14 ft. A small craft advisory will be needed. Sunday Night: North winds to 30 kt with a few gale force gusts to 35 kt in the evening diminishing to 20 to 25 kt after midnight. Slight chance of rain in the evening. Waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to 10 ft occasionally to 13 ft. | |
| Zone Forecast: Calumet Harbor IL to Gary IN (LMZ743) | |
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