SXUS45 KMSO 121230 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 506 AM MST Thu Feb 12 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...Partly sunny. Highs in the lower 40s. Variable winds up to 10 mph. Waves less than 1 foot. .Tonight...Mostly cloudy. Lows in the lower 30s. Variable winds up to 10 mph. Waves less than 1 foot. .FRIDAY...Mostly cloudy. Highs in the lower 40s. Variable winds up to 10 mph. Waves less than 1 foot. .FRIDAY NIGHT...Cloudy. A chance of rain and a slight chance of snow after midnight. Lows in the upper 30s. Variable winds up to 10 mph. Chance of precipitation 30 percent. Waves less than 1 foot. .SATURDAY...Mostly cloudy. Rain and snow likely in the morning, then a chance of rain and a slight chance of snow in the afternoon. No snow accumulation. Highs in the mid 40s. Variable winds up to 10 mph. Chance of precipitation 70 percent. Waves around 1 foot...locally up to 2 feet.