Heavy lake-effect snow downwind from Lakes Erie and Ontario; snow overthe Southwest/Southern Rockies.There is a Slight Risk of excessive rainfall over parts of the CentralGulf CoastThere is a Marginal Risk of severe thunderstorms over parts of theCentral Gulf Coast and Florida.A front extending from Maine over the Western Atlantic, coming backonshore over the Southeast, and stretching across the Gulf Coast on Sundaywill slowly move southward across Florida by Monday evening. A wave of lowpres...