Hail the size of golf balls pummels parts of Arizona as rare storm moves through the West

Hail the size of golf balls and damaging wind gusts pounded northern and central Arizona in a rare storm blowing through, bringing with it tornado risks and possible flash floods.

The National Weather Service issued multiple warnings as severe thunderstorms moved through the state overnight Tuesday and into Wednesday, encouraging people to seek shelter and stay away from windows as damaging 2- to 3-inch (5- 7.6-centimeter) hail struck the area. Hail pummeled people's roofs, shattered windows and dented cars.

Tornado watches were issued for multiple areas — the first the state has seen since October 2010.

Warm, moist air moving north fuels storms coming off the California coast. Changing winds can make them spin, creating the conditions for tornadoes, said Ryan Bernhart, a National Weather Service meteorologist in Flagstaff.

“This is very unusual for this area at this time of the year,” Bernhart said.

Strong winds toppled trees in Flagstaff and Mesa, with some landing on walls and carports. A few dozen ponderosa pines over 30 feet (9 meters) tall fell down in the Coconino National Forest, northwest of Flagstaff.
“These are not small trees that are down," Bernhart said. “These are pretty strong trees that had been knocked down.”