From NOAA for Grand Lake:
Friday: A 20 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 68. Breezy, with a light and variable wind becoming south southeast 11 to 16 mph in the morning. Winds could gust as high as 23 mph.
Friday night: Rain and snow showers likely, becoming all snow after midnight. Some thunder is also possible. Cloudy, with a low around 31. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
NWS Boulder (@NWSBoulder) October 11, 2012