What should be Chicago's most picture-perfect day in January could soon be followed by two to four inches of snow.
Highs of low- to mid-50s continue the winter warm streak Tuesday with clear skies and abundant sunshine. Not bad considering the average high this time of year is 31 degrees. Tuesday night stays clear and cool with above-average lows between 35 in suburban areas and 42 in Chicago.
Wednesday sunshine gives way to increasing clouds, light winds and more unseasonably warm temps with highs in the upper 40s and lower 50s. But a wintry switch takes affect later on with light snow showers developing overnight in the Chicago area as windy and colder conditions take hold.
Snow is expected Thursday with up to two to four inches of accumulation possible. Temps turn cold, falling from the upper 20s Thursday morning.
Friday could see some lingering snow showers in the morning, then windy cold.
Clouds should break up for partial sun later in the afternoon, but temperatures struggle to top the low 20s. More lake effect snow will be possible Friday in northwest Indiana and southwest Michigan.
Saturday won't be as cold but considerably chillier than we've had. Highs could reach the mid- to upper-20s.