SXUS45 KMSO 251230 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 605 AM MDT Sat Apr 25 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. A 20 percent chance of snow in the afternoon. Highs in the mid 40s. Variable winds up to 10 mph. Waves less than 1 foot. .Tonight...Partly cloudy. Lows around 30 . Variable winds up to 10 mph. Waves around 1 foot...locally up to 2 feet. .SUNDAY...Partly sunny. A 20 percent chance of rain and snow in the afternoon. Highs in the mid 40s. Variable winds up to 10 mph. Waves around 1 foot...locally up to 2 feet. .SUNDAY NIGHT...Mostly cloudy. Lows around 30 . Northeast winds around 15 mph in the evening becoming light. Waves around 1 foot...locally up to 2 feet. .MONDAY...Partly sunny. A 30 percent chance of rain and snow in the afternoon. Highs around 50 . Variable winds up to 10 mph. Waves around 1 foot...locally up to 2 feet.