A brief, intense storm cell pelted parts of Pennington and Custer counties with hailstones up to 2.75 inches in diameter Wednesday afternoon. Gusts over 50 mph also felled tree branches up to 4 inches thick in the Robbinsdale neighborhood, according to reports collected by the National Weather Service in Rapid City.

No injuries were reported.

Meanwhile, after two nights of heavy rains and hail, parts of Fall River County spent a restless night under a flood advisory. The affected areas included drainages along Cottonwood and Hat creeks and along Cheyenne River from the Wyoming state line through Edgemont.

Travelers were advised to stay off bridges and to not enter low-lying area covered by water. Flash flooding was expected in normally dry creek beds and in low agricultural land along the creeks and streams.

At 5:40 p.m., a resident 11 miles west of Edgemont reported heavy rain, winds and hail up to an inch in diameter. In a report posted on the Rapid City weather service Web site, the person said the storm leveled a cement granary, blew down a 20-foot barn and dropped power lines.

Fall River County authorities contacted later Wednesday had not heard of the damage.

Weather service officials in the late afternoon had advised the Fall River County area from Oelrichs to the Nebraska line to be on the lookout for possible tornado activity.

In the Rapid City area, a 10-minute hailstorm dropped quarter- to golf-ball-size ice chunks, affecting traffic at the Catron Boulevard-S.D. Highway 79 intersection, and on East St. Patrick and Cambell streets. Meteorologist John Wetenkamp said wind gusts topped out at 60 mph.

Similar reports of high winds, heavy rain and hail stretched from Crook, Weston and Campbell counties in northeast Wyoming to Ziebach, Corson and Dewey counties in the upper northeast section of western South Dakota. The 2.75-inch hail was reported nine miles east of Hermosa, and law enforcement officials said hail up to 1.75 inches hit the Glad Valley area in Ziebach County.