gallatin county area forecast 330 pm cst tue nov 24 2009 .tonight...mostly cloudy. a 30 percent chance of showers in the evening. lows in the lower 40s. southwest winds 10 to 15 mph. .wednesday...partly sunny. highs in the mid 50s. west winds 5 to 10 mph. .wednesday night...mostly clear. lows in the mid 30s. west winds 5 to 10 mph. .thanksgiving day...cloudy. a slight chance of rain or snow in the morning...then a slight chance of rain in the afternoon. highs in the mid 40s. west winds 10 to 15 mph. chance of precipitation 20 percent. .thursday night...mostly cloudy in the evening then becoming partly cloudy. lows in the upper 20s. west winds 5 to 10 mph. .friday...mostly sunny. highs in the upper 40s. .friday night...mostly clear. lows in the lower 30s. .saturday...mostly sunny. highs in the mid 50s. .saturday night...mostly clear with a 20 percent chance of rain. lows around 40. .sunday...partly sunny with a 30 percent chance of rain. highs in the lower 50s. .sunday night...mostly cloudy with a 40 percent chance of rain. lows in the mid 40s. .monday and monday night...cloudy with a 40 percent chance of rain. highs in the upper 40s. lows around 40. .tuesday...mostly cloudy with a 30 percent chance of rain. highs in the upper 40s.