Break out those shovels, because storms are about to dump a mess of snow and ice on a large part of the U.S. As of noon Tuesday, at least 20 states were under winter warnings or advisories.

RENEWED MODERATE FLOODING POSSIBLE AT GAIRLOCH, INGHAM PUMP STATION, ABERGOWRIE BRIDGE AND GLENEAGLE OVER NEXT FEW DAYS Heavy ... Remember: If it's flooded, forget it. For flood emergency assistance ...