SHELTON WEATHER: Think layers — lots of layers

Today could feel like one of the coldest days in decades.

A wind chill advisory remains in effect for Shelton and the rest of southwestern Connecticut through 6 p.m. on Tuesday, Jan. 7.

The wind chill could make it feel 15-below-zero on Tuesday — after yesterday’s high of 55. Winds are expected to be 20 to 30 mph with gusts up to 45 mph.

The temperature in Shelton was 5 degrees as of 8 a.m. on Tuesday, with a wind chill factor of -11. The air temperature high is not expected to surpass 12 degrees in the city Tuesday, despite sunny skies.

The overnight low Tuesday into Wednesday is forecast to be 4 degrees, with wind chills of -11.

“Prolonged exposure to the bitter cold and wind could lead to frostbite and hypothermia,” the National Weather Service (NWS) warned.

Black ice warning

The rabidly falling temperatures over the past 24 hours — drops of 1 to 4 degrees an hour since 8 a.m. on Monday — have caused moisture on roadways and sidewalks to freeze and create black ice.

“This will mainly be an issue on secondary roads,” the NWS said.