SXUS45 KMSO 021230 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 506 AM MST Mon Feb 2 2026 Note: The experimental wave height forecasts are representative of the mid lake waters and downwind shores. Wave heights may be significantly less on upwind shores. .Today...Mostly cloudy. A slight chance of rain early in the morning. A slight chance of rain late in the afternoon. Highs in the mid 40s. Variable winds up to 10 mph. Chance of rain 20 percent. Waves around 1 foot...locally up to 2 feet. .Tonight...Cloudy. Lows around 40 . Variable winds up to 10 mph. Waves less than 1 foot. .TUESDAY...Cloudy. Highs in the mid 40s. Variable winds up to 10 mph. Waves less than 1 foot. .TUESDAY NIGHT...Mostly cloudy. Lows in the upper 30s. Variable winds up to 10 mph. Waves less than 1 foot. .WEDNESDAY...Mostly cloudy. Highs in the upper 40s. Variable winds up to 10 mph. Waves less than 1 foot.