Tennessee wakes under a cool, muted sky this morning as thin clouds drift across Nashville and a light haze clings to fields near the Cumberland River. The pavement feels damp and crisp, hinting at the colder December air preparing to slide south toward the region.

According to the National Weather Service, today stays mostly sunny and seasonably mild, but a noticeable transition begins by Saturday as north winds strengthen. Patchy fog may develop early Saturday before skies clear, allowing temperatures to reach the lower 50s. Once winds turn northwest later in the day, colder air will spill into Middle Tennessee and set the stage for a sharper Sunday cool-down.

Meteorologists are now tracking a strong arctic surge tightening over the Upper Mississippi Valley. While the heaviest snow remains far to the north, the southern edge of this system will reach Tennessee through the weekend. Sunday may feel like the first true bite of December, with highs struggling to reach the mid-20s and wind gusts pushing the air even colder. By Sunday night, temperatures could fall into the low teens—cold enough to freeze any lingering moisture on bridges, ramps, and shaded roadways.

Drivers should plan extra caution during early-morning travel Sunday and Monday. Even light frost can create slick patches where pavement stayed damp from humidity or runoff. Outdoor events, sports practices, and holiday errands may also feel the sting of a quick winter preview.

A steadier pattern returns early next week with sunshine and slow warming, but mornings stay cold.

5-DAY OUTLOOK

• Today: Mostly sunny; breezy at times.
• Saturday: Patchy morning fog; highs near 50.
• Sunday: Bitter cold; highs near 24; freeze risk.
• Monday: Sunny; highs near 38; cold start.
• Tuesday: Sunny; gradual warmup.