State forecast for S.D.

Flash flood watch far southeast this morning...

Today...Patchy fog southeast early this morning...Otherwise mostly cloudy with a chance of thunderstorms. Partly to mostly cloudy north and west with isolated morning thunderstorms northwest. Highs from the mid 70s northeast...To the mid 80s southwest.

Tonight...Mostly clear north...Partly cloudy south. A chance of thunderstorms mainly after midnight southwest. Areas of fog southeast after midnight. Lows mainly in the 50s.

Saturday...Mostly clear northeast...Partly cloudy south and west. A slight chance of thunderstorms south central...A chance of thunderstorms southwest in the afternoon...Spreading north and east overnight. Highs from the mid 70s far east...To the upper 80s southwest.

Sunday...Partly to mostly cloudy. Chance of thunderstorms...Mainly west and south...A slight chance of daytime thunderstorms northeast. Lows 60 to 65. Highs from the upper 70s northeast...To the mid 80s central.

Monday...Mostly cloudy. A slight chance of thunderstorms southwest...A chance of thunderstorms north and east. Lows from the upper 50s far north and far west...To the mid 60s far southeast. Highs from the upper 70s northeast...To the lower 90s southwest.

Tuesday...Partly cloudy south and west...Mostly cloudy northeast. Chance of thunderstorms east...And a slight chance of thunderstorm during the day northwest. Lows in the 60s. Highs in the upper 70s north...To the upper 80s southeast.