Storm reports for July 13, 2010

Storms with very large hail hit southwest and south central North Dakota from late on July 13, 2010, into the early hours of July 14.¹ Hettinger, Grant, Sioux and Emmons counties were hit hardest by baseball to softball size hail, and some stones went through home roofs.¹ A 5-inch hailstone near Cannon Ball in Sioux County at 10:40 p.m. MST tied the North Dakota record, and one stone broke a car windshield and injured two people.¹ Hail up to 4.25 inches across fell in Elgin, where homes across town had broken windows and damaged siding and shingles. Homes in New Leipzig and Mott had similar damage.^2,3,4 NOAA's Storm Events Database lists $2 million in property damage in Elgin and $1.5 million each near Cannon Ball and in Napoleon.^2,1,5

Early on July 14, winds estimated at 105 mph damaged roofs and pole barns and destroyed several grain bins in Grand Rapids in LaMoure County, and wind towers 10 miles west of Edgeley recorded a 103 mph gust.⁶ An EF2 tornado with peak winds estimated at 120 mph destroyed farm buildings west and east-southeast of Lisbon, and many homes and businesses in Lisbon had extensive roof damage.⁷ Downburst winds estimated at 78 knots (90 mph) flipped two semi trailers in West Fargo and damaged roofs of industrial businesses.⁸

In North Carolina, an EF1 tornado crossed two subdivisions in Denver in Lincoln County on the afternoon of July 13, dropping trees on homes and causing minor roof damage.⁹