Low pressure will lift a warm front through the Twin Tiers on Saturday with showers and thunderstorms likely.  A cold front will approach late Saturday with more thunderstorms likely, some of which could be on the strong side with gusty winds and  heavy rain.  The front will clear the region Sunday morning with any lingering showers or thunderstorms coming to an end, followed by partly sunny skies during the afternoon with temperatures in the lower 80s.