Happy Saturday, and first day of Winter everyone! We started the day off with some sunshine and MUCH COLDER temperatures than anticipated, with lows bottoming out around -7F last night in Rochester. Less cloud cover and the fresh snow allowed for optimal radiational cooling at the surface, resulting in colder than expected temperatures across most of Minnesota. Temperatures have warmed into the mid to upper teens in Minnesota and lower 20F’s for most of northern Iowa this afternoon.