Overnight...Mostly cloudy. Scattered flurries...Then scattered snow showers late. Lows 15 to 20. Northwest winds 10 to 15 mph... Diminishing to 10 mph or less. Chance of snow 30 percent.

Wednesday...Lake effect snow...Mainly in the afternoon...Mainly south of watertown. Accumulation 2 to 4 inches. Windy with highs in the lower 20s. Northwest winds 10 to 15 mph...Becoming west and increasing to 20 to 30 mph. Chance of snow near 100 percent.

Wednesday Night...Mostly cloudy. Snow showers in the evening. Additional accumulation 1 to 2 inches possible. Lows zero to 5 above. Northwest winds 15 to 25 mph...Diminishing to 10 to 20 mph. Chance of snow 70 percent.

Thursday...Mostly sunny. Highs 15 to 20. Northwest winds 10 to 20 mph.

Thursday Night...Partly cloudy. Lows zero to 5 above. Northwest winds 10 to 15 mph...Becoming north 10 mph or less.

Friday...Mostly sunny. Highs in the lower 20s.

Friday Night...Partly cloudy. Lows 5 to 10 above.

Saturday...Mostly sunny. Highs around 20.

Saturday Night...Partly cloudy. Lows 10 to 15.

Sunday...Partly sunny with a 30 percent chance of snow showers. Highs in the upper 20s.

Sunday Night...Mostly cloudy with a 30 percent chance of snow showers. Lows 15 to 20.

Monday...Partly sunny with a 30 percent chance of snow showers. Highs in the lower 30s.

Monday Night...Mostly cloudy. Lows 15 to 20.

Tuesday...Partly sunny with a 30 percent chance of snow. Highs around 30.