“It sounded like someone was drilling our building with a hammer. It was deafening in our shop area,” said to the media Kent Nicholson ,Fire Chief in Blair, Nebraska, north of Omaha. The police used boats to assist dozens of drivers stranded in floodwaters around the city . In that area a dozen people suffered minor injuries after being struck by the outsized hailstones. At least eight tornado were reported in Nebraska, in Iowa and Wyoming, where hail with big dimension also pelted, as on the southwestern corners of South Dakota and Iowa, ranging from golf ball to tennis ball size. Roofs of two motels on Missouri Valley were affected. In western Iowa, more than 25 vehicles had their windows shattered by hail. “These storms can knock down trees, cause power outages and travel mayhem for the Wednesday morning commute,” predicted AccuWeather.com senior meteorologist Alex Sosnowski, announcing the future evolution, when the storms and winds are expected to move east into Wednesday morning, into eastern Missouri, central Illinois, Indiana, Kentucky, southern Ohio, parts of Tennessee and West Virginia.