A severe storm could slam a slew of major cities along the east coast with gusting winds and heavy rain this weekend, forecasts show. That rain would be snow if it wasn’t so unseasonably warm, the Washington Post notes. It means flooding will be a risk along the Gulf Coast, which could see up to 4 inches of rain. Tornado threats arrive in Florida late Saturday night, then creep north to Georgia, the Carolinas and Virginia Sunday, the Washington Post forecast shows. The rain should begin pounding the Mid-Atlantic region Sunday and arrive in the Northeast Sunday night, according to the forecast….