An Arctic blast is about to slap Colorado

State of play: The storm starts late Thursday with low temperatures falling into the teens overnight — all just a day after Denver saw a balmy 50, the National Weather Service reports.

• Friday's high will only reach the upper teens or lower 20s with gusty winds and a chance of snow. The low overnight is 5 with more snow likely.
• For Saturday, the high only reaches 11 with lows again in the single digits.

The big picture: The cold air mass is part of a huge winter storm stretching across the country with snow, freezing rain and sleet affecting 40 million Americans.

What's next: Back in the Denver area, Sunday is still cold, but above-freezing temps arrive Monday.