State forecast for S.D.

Heavy snow warning northwest to central late this afternoon into thursday morning...

Winter storm watch eastcentral portion along and north of i 90 tonight into thursday...

Today...Mostly cloudy. Rain and snow northwest by afternoon. Chance of light rain developing remainder of west and south. Highs in the lower 40s northeast and around black hills to the lower 50s south.

Tonight...Snow most areas except chance of rain and snow far south. Lows in the lower 20s north to the lower 30s far south.

Thursday...Snow decreasing from west to east. Chance of mixed light rain south in the afternoon. Highs in the lower 30s northeast to 40 to 45 far southwest.

Thursday night...Mostly cloudy. A chance of light snow...Mainly in the evening. Lows in the upper teens to mid 20s.

Friday...Mostly cloudy. Slight chance of light rain and light snow northwest. Highs in the 30s northeast to the 40s southwest.

Saturday...Mostly cloudy and breezy with a chance of light rain and snow. Lows in the upper teens north to the mid 20s south. Highs in the upper 30s northeast to the mid 50s southwest.

Sunday...Partly cloudy. Lows in the lower 20s northwest to the lower 30s far southeast. Highs in the mid 40s north to the mid 50s southcentral.