Once wind chill values reach -20°, it only takes 30 minutes or less for frostbite to set in. Surprisingly, humidity does not affect the overall wind chill enough to be considered a factor, but if skin or clothing become wet it can shorten the time to frostbite considerably.

WEDNESDAY: FIRST ALERT. Still cold. Mostly sunny with highs in the single digits and teens. Wind chill values on either side of 0°. NW wind will gust 15-20 mph. More sub-zero lows and wind chill values overnight.

A new disturbance moves in late tonight through late week. It's this system that will help to moderate temperatures back to near normal with a few flurries/snow showers included.