by Michael J. Marino
Balls of hail measuring as large as 2.5 inches in diameter, relatively the size of a human palm (see photo at right), ended the 4th of July weekend causing extensive damage around Yellowstone County.
The force behind the unprecedentedly large hail was heightened by high wind speeds, which gusted up to 53 miles per hour, according to the National Weather Service (NWS) in Billings
A meteorologist with NWS stated that these types of thunderstorms are not uncommon for this area, but noted the timing was a bit strange. He explained that the Yellowstone County area has “tapped into a deeper moisture pool” this summer, and added, “we just have a lot more moisture [than usual] running over top of us.” It was reported by NWS that an irregular amount of energy – brought on by a trough to the northwest of this region – is the reason that such a tremendous storm occurred this early in the season. read more