January featured unusual jet stream dynamics across North America ... To those of you in Eastern Canada, the transition will feel much less abrupt. A lingering, upper trough stalls across northern ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

January featured unusual jet stream dynamics across North America ... bringing a brief reprieve from the deep chill for much of Eastern Canada. The flip in temperature anomalies, colder air northwest ...