933 FPUS63 KFSD 272110 SFPSD SDZ001>074-281200- STATE FORECAST FOR SOUTH DAKOTA NATIONAL WEATHER SERVICE SIOUX FALLS SD 410 PM CDT Mon Aug 27 2018 .TONIGHT...Mostly cloudy. Chance of showers and thunderstorms north and east. Lows from the upper 40s far west, to mid 60s far southeast. .TUESDAY...Decreasing clouds. Slight chance of daytime showers and thunderstorms far west and southeast. Highs from mid 60s to lower 70s. .TUESDAY NIGHT...Mostly clear. Lows from the mid 40s to lower 50s. .WEDNESDAY...Mostly clear. Highs in the mid 70s to mid 80s. .THURSDAY...Increasing clouds. Chance of thunderstorms east, mainly at night. Lows mid 50s to lower 60s. Highs from the upper 70s east to lower 90s central. .FRIDAY...Partly cloudy. Chance of thunderstorms east. Lows mid 50s to mid 60s. Highs upper 70s to upper 80s. .SATURDAY...Partly cloudy. Lows lower 50s to lower 60s. Highs upper 70s to lower 80s. $$