The Length Of Day and Strength Of Cold

Every day is getting longer and the sun is getting stronger, but we are still a long way from the feel of spring. Why is this?
Well, there's another expression that we use at this time of the year..."As The Days Lengthen, The Cold Strengthens."
It is this expression that rings true most of the time during January and early February. That is because, even though the rays of the sun are getting a bit more direct each day, it's not enough to offset the weight of cold, heavy air masses coming out of Canada and overspreading much of The United States.
Another such air mass will be with us Thursday night through Friday night, which will be another very cold period of time.

Harvey Leonard
Co-Chief Meteorologist, WCVB-TV