PITTSBURGH — There is the potential for significant snowfall this weekend as a storm system moves in. Periods of snow will develop late Saturday night. On Sunday, there is potential for heavy snow of at least six inches, especially east and south of Pittsburgh. Some areas could get even more than that, particularly by Sunday evening. There is plenty of uncertainty on exactly how the storm will track. Tune to WJPA 95.3FM/1450AM for the very latest from the National Weather Service.