A supercell thunderstorm has produced hailstones up to four inches in diameter near Roswell, New Mexico. Tornado warnings were issued in the state this weekend but that did not stop amateur photographers and videographers setting out to capture the conditions on camera. The images were taken north-east of the city of Roswell. Locals collected some of the bigger hailstones that were produced. Many of them measured between three and four inches. A supercell is the most dangerous type of storm and features a large rotating updraft of air known as a mesocyclone and can produce torrential rain, hail, swirling winds and tornadoes. See more pictures via Sky News.