simpson county ky area forecast 1108 am cdt sun may 19 2013 .this afternoon...mostly cloudy in the afternoon then becoming partly cloudy. scattered showers and thunderstorms. highs in the lower 80s. southwest winds 5 to 10 mph. chance of precipitation 40 percent. .tonight...partly cloudy. lows in the mid 60s. south winds 5 to 10 mph. .monday...partly cloudy. highs in the upper 80s. south winds 5 to 15 mph. .monday night...partly cloudy. lows in the upper 60s. south winds 5 to 10 mph. .tuesday...partly cloudy with a 30 percent chance of showers and thunderstorms. highs in the upper 80s. south winds 10 to 15 mph. .tuesday night...partly cloudy with a 50 percent chance of showers and thunderstorms. lows in the upper 60s. .wednesday and wednesday night...showers and thunderstorms likely. highs around 80. lows in the mid 60s. chance of precipitation 60 percent. .thursday...partly cloudy with a 40 percent chance of showers and thunderstorms. highs in the upper 70s. .thursday night...partly cloudy with a 30 percent chance of showers and thunderstorms. lows in the lower 60s. .friday...partly cloudy with a 20 percent chance of showers and thunderstorms. highs in the mid 70s. .friday night...partly cloudy. lows in the mid 50s. .saturday...mostly sunny. highs in the mid 70s.