Several bouts of winter weather are forecast to impact the area over the next week. The first event will occur Tuesday morning as milder air aloft overrides a sub-freezing layer near the ground, resulting in patchy light freezing drizzle. Analysis of soil temperatures indicates that ground surfaces are frozen. The drizzle may not yield measurable precipitation, but even a thin coating of ice can adversely impact untreated roadways.
Satellite imagery late Monday showed a large Pacific storm system lashing much of California. Some of this energy is expected to eject eastward, producing a weak system that may bring minor snow accumulations to parts of the metro area Thursday. Of greater concern is a third event forecast to occur Friday night into Saturday. Early computer guidance suggests this system could bring a more robust snowfall, followed by the first true arctic air to reach the Midwest this winter.