You will notice clouds increasing over the area from north to south as we move throughout the first day of 2017. High temperatures will only make it into the 20s.
An arctic air mass settles into the area on Sunday night and will lift the warmer air up as it builds in. This will help produce light snow late on Sunday night in far northwestern South Dakota. Snow is likely through much of the day Monday. This will not be anything major, and most places will receive 1-3" of fresh powder. Lesser amounts are expected south and east of Rapid City, with higher amounts north and west.
High temperatures will be in the single digits above zero with sub-zero overnight lows through almost all of the upcoming week.
A blocking pattern will keep that cold airflow in place leaving us with well below average temperatures for the start of January.