A cold front will pass through the Twin Tiers Saturday afternoon with a shower possible along with the chance for a thunderstorm.  Rainfall amounts will be light and the showers expected to be brief.  Daytime temperatures will top out in the upper 70s.  Cooler conditions will follow the front and despite plenty of sunshine on Sunday, temperatures will struggle into the lower 70s.  Warmer conditions will return through the first half of next week with a more significant cool down expected by late week.