knox county area forecast 1013 am edt thu may 15 2008 updated 1st period .this afternoon...occasional showers and a chance of thunderstorms. highs in the upper 60s. southeast winds at 5 to 10 mph. chance of rain 90 percent. .tonight...showers with a chance of thunderstorms...mainly in the evening. patchy fog. lows in the mid 50s. light winds. chance of rain 90 percent. .friday...mostly cloudy. a 30 percent chance of showers...mainly in the morning. highs in the upper 60s. northwest winds 10 to 15 mph. .friday night...partly cloudy. lows from the mid 40s in the valleys to around 50 on the ridges. light winds. .saturday...partly cloudy. a slight chance of showers in the afternoon. highs in the lower 70s. west winds 10 to 15 mph with gusts up to 25 mph. chance of rain 20 percent. .saturday night through monday night...mostly cloudy with a 30 percent chance of showers. lows in the lower 50s. highs around 70. .tuesday...partly cloudy with a 30 percent chance of showers. highs in the lower 70s. .tuesday night...mostly cloudy with a 30 percent chance of showers. lows around 50. .wednesday...partly cloudy with a 30 percent chance of showers and thunderstorms. highs in the mid 70s.