Invasions of chilly air from the north become increasingly common during thesecond half of September and October. Up north the air is growing colder by theday, mainly because all effective sunlight has been lost. Up around the ArcticCircle the sun is barely above the horizon this time of year and outgoing heatenergy greatly exceeds what is being gained.A cold front Friday will lower temperatures significantly across the northernPlains and Montana. The chilly air will reach the Midwest and Great LakesFriday night and Saturday. Some of this cooler weather will be felt across theNortheast Sunday and Monday.
The Latest
42 minutes ago
A weak Pope Francis thanks people for their prayers 'from the bottom of my heart' in audio message1 Hour ago
Car being pulled from Columbia River might have belonged to Oregon family that vanished in 19582 Hours ago
Canada's tariffs to remain despite Trump postponing tariffs on many imports from Canada for a month3 Hours ago
California's Gavin Newsom opposes trans athletes in women's sports, splitting with progressivesAutumnlike Chill on the Way
By AccuWeather
September 15, 2010 at 7:25PM
Story by AccuWeather.com Senior Meteorologist John Kocet.
