• A strong arctic airmass will plunge into the central U.S. today sharply dropping temperatures and producing dangerous wind chills. While little snow is expected with this moisture-starved system, the gusty winds could cause blizzard conditions with any snow that does fall and accumulate. Across the South, moderate to heavy rainfall will begin today increasing flood chances across the Southeast.
• Today: Windy. Partly sunny in the morning...then cloudy with a 50 percent chance of light snow in the afternoon. Patchy blowing snow in the afternoon.

Highs around 30. Temperature falling into the upper single digits in the afternoon. West winds 10 to 15 mph with gusts to around 30 mph increasing to north 25 to 30 mph with gusts to around 45 mph in the afternoon.
• Tonight: Windy. Much colder. Patchy blowing snow in the evening. Mostly cloudy with a 20 percent chance of light snow in the evening...then partly cloudy after midnight. Lows around 15 below. North winds 20 to 30 mph with gusts to around 45 mph decreasing to 15 to 20 mph after midnight. Wind chill readings 30 below to 40 below zero.
• Sunday: Much colder. Mostly sunny. Highs around 5 below. West winds 5 to 15 mph. Lowest wind chill readings 30 below to 40 below zero in the morning.
• Sunday Night: Partly cloudy in the evening...then mostly cloudy with a 20 percent chance of light snow after midnight. Lows around 15 below. Temperature steady or slowly rising after midnight. South winds around 5 mph. Wind chill readings 20 below to 30 below zero.
• Monday: Mostly cloudy with a 30 percent chance of light snow. Highs 5 to 10 above. Southeast winds around 5 mph shifting to the northeast in the afternoon. Lowest wind chill readings 15 below to 25 below zero in the morning.
• Monday Night Through Tuesday Night: Mostly cloudy with a 20 percent chance of light snow. Lows around 15 below. Highs around 5 below. Wind chill readings 20 below to 30 below zero.