National Weather Service United States Department of Commerce

A cold front will bring precip chances back to the forecast late Saturday through early Sunday. Chances are highest in our north, with that area seeing most if not all snow. Further south, the chance of precip decreases substantially, and these areas are likely to see all rain. A rain/snow mix will exist in the middle, including the St. Louis metro.
This weekend will be cloudy and largely warmer than the past week. A cold front will bring precip to the area Sat night/Sun morn, but colder temperatures will not return en masse until Sun night.