355 SXUS45 KMSO 112330 RECGPI Recreation Forecast for Flathead Lake National Weather Service Missoula MT 505 PM MDT Sun Aug 11 2019 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...A slight chance of thunderstorms early in the evening. Showers in the evening, then showers likely after midnight. Lows in the upper 50s. Variable winds up to 10 mph. Chance of precipitation near 100 percent. Waves less than 1 foot. .MONDAY...Mostly sunny. A 20 percent chance of showers in the morning. Patchy fog in the morning. Highs in the mid 60s. Variable winds up to 10 mph. Waves less than 1 foot. .MONDAY NIGHT...Clear. Lows in the mid 50s. Variable winds up to 10 mph. Waves less than 1 foot. .TUESDAY...Sunny. Highs in the lower 70s. Variable winds up to 10 mph. Waves less than 1 foot.