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The season's first frozen precipitation was spotted Thursday afternoon across suburbs north and west of Baltimore, and with cold temperatures lasting into next week, more chances of wintry weather are ahead.

The National Weather Service asked drivers to proceed with caution during the evening rush, as the wintry mix of precipitation was limiting visibility. But little to no accumulation was expected.

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The dusting nonetheless ushers in a prolonged period of weather more common in December or January. Temperatures aren't expected to get any warmer than the 40s over the next week.

Sub-freezing wind chills are forecast for much of Friday, and after lows drop well into the 20s this weekend, a stronger chance of snow, likely mixed with rain, is ahead Sunday.

"There's potential for mischief Sunday night into Monday," said Rich Foot, founder of the local forecasting website Foot's Forecast. "Accumulating snow is not out of the question."

The pattern of wintry cold weather that has swept across the country this week reached Maryland on Thursday, with temperatures rising only into the mid-40s after dropping to 37 degrees overnight at Baltimore-Washington International Thurgood Marshall Airport.

A sunny, brisk day is forecast Friday, with wind chills in the 20s and 30s all day and air temperatures rising only to the lower 40s. Normal highs this time of year are in the mid- to upper 50s, with lows in the upper 30s.

Lows are forecast in the lower to mid-20s Saturday and Sunday mornings, with afternoon highs in the lower to mid-40s.

A system of moisture from the Gulf of Mexico is forecast to arrive Sunday in between two blasts of cold air, Foot said, something that could improve chances for snow given that conditions rarely allow it this time of year. The relative warmth of the Chesapeake Bay waters and the ground often prevent snow from accumulating.

The National Weather Service is forecasting a 60 percent chance of a rain and snow mix Sunday night into Monday morning, with overnight lows in the mid-30s.

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