Snow Storm May Mess With Post-Christmas Travel Midwest, East Coast brace for severe weather By Kevin Spak, Newser User Posted Dec 24, 2012 10:01 AM CST 16 comments Comments Luke McHenry his son dig out their snow-buried vehicle as residents in Madison, Wis. contend with a severe winter storm that moved through the upper Midwest, December 20, 2012. (AP Photo/Wisconsin State Journal, John Hart) (Newser) – Envy jolly old St. Nick: He gets to do all his flying tonight. Americans planning to fly home the day after Christmas, on the other hand, might be in trouble. A huge storm system that has already dumped rain and snow on the West Coast should hit the Midwest and East Coast just in time to muck with travel plans, ABC News reports. By Wednesday the Midwest will likely be blanketed by snow, which could cause delays at airports in Chicago, Cleveland, Detroit, and St. Louis. The National Weather Service is also warning of a "risk for a significant severe weather outbreak on Christmas Day" across the southeastern US, including possible tornadoes in the Lower Mississippi River Valley. By Thursday, the Northeast on one end and Florida on the other will get their turn. Of course, West Coast residents have already been through all this; more than 400 flights were cancelled yesterday in San Francisco alone.