December 20, 2013; 4:10 AM ET
Warmer air will work into Boston later this week into the weekend. However, episodes of rain, drizzle and fog will tag along. more >
Mixed rain and snow tonight; watch for icy spots Details >
Dec 20, 2013; 5:48 AM ET United States travel weather forecast
Similar to the days prior to Thanksgiving, the worst weather will focus on the days prior to Christmas as millions of travelers take to the roads and skies in the U.S. and southern Canada.
Warm air is forecast to surge into much of the eastern half of the nation by the weekend and will be accompanied by heavy rain and flooding risk in some locations.