SXUS45 KMSO 022330 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 506 PM MDT Thu Apr 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. .Tonight...Cloudy. Rain and snow likely in the evening, then a slight chance of rain and snow after midnight. No snow accumulation. Lows in the upper 30s. Variable winds up to 10 mph. Chance of precipitation 70 percent. Waves around 1 foot...locally up to 2 feet. .FRIDAY...Mostly cloudy. A 20 percent chance of rain in the morning. Highs around 50 . Variable winds up to 10 mph. Waves less than 1 foot. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 30s. Variable winds up to 10 mph. Waves less than 1 foot. .SATURDAY...Sunny. Highs in the mid 50s. Variable winds up to 10 mph. Waves less than 1 foot.