Thunderstorms and tornadoes expected to sweep eastward across the US The Guardian USMajor storm to sweep United States with severe weather, snow, flooding The Washington PostSevere weather threat likely: Expect heavy rainfall with small tornado risk WKRC TV CincinnatiApril To Begin With Severe Weather, Tornado Threat | Weather.com The Weather Channel‘Golf ball-sized’ hail and flooding threaten central US as April showers begin MSN