Snowfall amounts will probably range from 5 to 8 inches, although confidence is lower in amounts north and south of the immediate area.

A winter storm watch was issued by the National Weather Service on Saturday at 7:13 p.m. valid from Sunday 7 p.m. until Monday 7 p.m. for Washington and Westmoreland counties.

A winter storm system is expected to bring up to eight inches of mixed precipitation to the St. Louis area, with areas north of I-70 seeing mainly snow, areas south of metro St. Louis facing significant icing, and the metro area in a transition zone with many forms of winter precipitation in the forecast.