The colder regime of Thanksgiving week starts with a frontal passage on Saturday morning. The front itself won't have much in the way of activity to it as it looks like modeling has the low tracking a good distance north of the region. There is some difference in the specific track of the low as it moves northeast but the general idea is that the low tracks north of us and puts us into the warm sector on Friday night and early Saturday before the cold front passes through.
Saturday may end up being a "falling temps" type of day where the high occurs early on and we see temperatures bounce slowly lower through the course of Saturday. Saturday night could be pretty chilly as lows in the 20's or low 30's loom for the region. Sunday's highs probably don't break 40.
In terms of "impact" weather, this front is pretty light on precipitation at this point. There could be a round of steadier rain or rain showers moving through with the front but it does not look like a particularly robust round of rain on Friday night and early Saturday. The shot of cold that follows this low will be pretty robust though!