A large low pressure system will move out of the Commonwealth Today. The low pressure system will leave behind gusty winds and lake effect snow in the western part of the Commonwealth. The Northwestern portions of Pennsylvania could see lake effect snow linger into Wednesday with the potential for significant snow accumulation. Come Thursday, high pressure dominates the state, putting an end to the lake effect snow and keeping much of the Commonwealth free of any rain. This doesn’t last long, as Friday could see another potential for scattered showers and lake effect snow once again. Temperatures will hover around average across much of Pennsylvania throughout the week.