The brief spell of warm weather will come to an abrupt end later Saturdayacross New England and upstate New York as a classic back door cold front dropssouthward through the region.In Boston, afternoon temperatures will drop through the 50s Saturday behindthe front as the wind shifts into the east.

Cooler air will slowly push through Pennsylvania and New Jersey Sunday astemperatures fall into the 50s and 60s.

Story by AccuWeather.com senior Meteorologist Brett Anderson.