Outdoors journal: Astronomical winter By Jim Gilbert, Star Tribune
For meteorologists in the Upper Midwest, winter runs from Dec. 1 to the end of February. On the first day of meteorological winter this year we had our first snowstorm.
By astronomical calculation, winter will arrive at 12:08 a.m. tomorrow. At that time the earth will reach the point in its revolution about the sun so that the North Pole is inclined 23½ degrees away from the sun. We call this the winter solstice, when we in the Northern Hemisphere have our longest night and shortest day.