If you needed one more sign that it’s about to get cold: Forecasters have issued a freeze watch in the Lowcountry from Wednesday night through early Thursday.

The watches are issued early when the National Weather Service has high confidence it’s going to happen, said chief meteorologist Mike Emlaw, with the Charleston office.

Temperatures will drop to about 30 degrees — warmer along the coast, colder inland. The watch joined a wind advisory through 10 a.m. Wednesday as the season’s first powerful Arctic wave blasts through.

Gusts could reach 40 mph, tropical storm strength. Sustained winds were forecast to rise to 20-30 mph Wednesday.

Oh, and the wind chill will make those 30 degrees feel like 20s.

“You combine that temperature with those winds and it’s going to feel very different than it has the past few days,” Emlaw said Tuesday.

The high Wednesday is expected to be about 50 degrees; on Thursday the high will climb into the 50s; and on Friday to about 60 degrees as the region gradually warms again.

Winds will die down to about 10 mph Wednesday evening.