This Afternoon...Mostly cloudy early...Then partly sunny with a chance of showers and thunderstorms late. Warm with highs ranging from the mid 70s along the lake Ontario shore to the mid 80s inland. Southwest winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 50 percent. Tonight...Mostly cloudy. Showers and thunderstorms likely in the evening...Then a chance of showers overnight. Warm with lows in the mid 60s. Southwest winds 10 to 15 mph. Chance of rain 70 percent. Thursday...Partly sunny with a chance of showers in the morning... Then mostly cloudy with showers in the afternoon. Cooler. Early highs ranging from the mid 60s along the lake shore to the lower 70s inland...Then temperatures falling to the upper 50s along the lake shore and to the mid 60s inland. Southwest winds 10 to 15 mph... Becoming west. Chance of rain 80 percent. Thursday Night...Showers in the evening...Then occasional rain overnight. Lows in the lower 40s. North winds 10 to 20 mph. Chance of rain 80 percent. Friday...Partly sunny with a chance of showers in the morning... Then mostly sunny in the afternoon. Cool with highs in the upper 50s. North winds 10 to 20 mph...Becoming northwest. Chance of rain 30 percent. Friday Night...Mainly clear. Lows in the lower 40s. Highs in the lower 60s. Saturday...Mainly clear. Lows in the lower 40s. Highs in the lower 60s. Sunday...Mainly clear. Lows in the lower 40s. Highs in the lower 60s. Memorial Day...Mainly clear. Highs in the upper 60s. Lows in the mid 40s. Monday Night...Mainly clear. Highs in the upper 60s. Lows in the mid 40s.