987 FPUS63 KFSD 032034 SFPSD SDZ001>074-041100- State Forecast for South Dakota National Weather Service Sioux Falls SD 333 PM CDT Mon Jul 3 2017 .TONIGHT...Clear to partly cloudy west. Becoming mostly cloudy east. A few evening thunderstorms west. Chance of thunderstorms central and east. Lows in the 60s. .INDEPENDENCE DAY...Partly cloudy to sunny west. Partly to mostly cloudy east. Slight chance of thunderstorms west, chance of thunderstorms east. Highs in the 90s, except 80s along I 29. .TUESDAY NIGHT...Clear west, partly cloudy east. Chance of evening thunderstorms east. Lows in the 60s. .WEDNESDAY...Mostly clear. Highs around 90 along I 29, lower 90s to 102 elsewhere. .THURSDAY...Clear to partly cloudy. Slight chance of thunderstorms around the Black Hills and south central. Lows 65 to 70. Highs 90 to 100. .FRIDAY...Clear to partly cloudy and cooler. Chance of thunderstorms west. Lows 60 to 65. Highs 80 to 90. .SATURDAY...Mostly clear. Chance of thunderstorms around the Black Hills, south central and east. Lows upper 50s to mid 60s. Highs lower 80s to lower 90s. $$