SXUS45 KMSO 111230 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 505 AM MST Thu Dec 11 2025 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...Windy. Rain in the morning, then rain likely in the afternoon. Highs in the mid 40s. Southwest winds 15 to 30 mph decreasing to 15 to 20 mph in the afternoon. Chance of rain near 100 percent. Waves 1 to 2 feet...locally up to 3 feet subsiding to around 1 foot...locally up to 2 feet late in the afternoon. .Tonight...Cloudy. A slight chance of rain in the evening, then a chance of rain and snow after midnight. Lows around 40 . Southwest winds around 15 mph in the evening becoming light. Chance of precipitation 50 percent. Waves around 1 foot...locally up to 2 feet. .FRIDAY...Rain and snow. No snow accumulation. Highs in the upper 40s. Variable winds up to 10 mph. Chance of precipitation 90 percent. Waves less than 1 foot. .FRIDAY NIGHT...Rain likely in the evening, then rain and snow likely after midnight. No snow accumulation. Lows in the lower 40s. Southwest winds around 15 mph. Chance of precipitation 60 percent. Waves around 1 foot...locally up to 2 feet. .SATURDAY...Cloudy with a 30 percent chance of rain in the morning, then partly sunny in the afternoon. Highs in the upper 40s. Variable winds up to 10 mph. Waves around 1 foot...locally up to 2 feet.