Golf ball-sized hail and damaging winds pounded northern and central Arizona in a rare storm that triggered tornado watches and left roofs, windows, and cars battered.
Severe thunderstorms moved through the state overnight Tuesday and into Wednesday, dropping damaging 2- to 3-inch hail on northern and central Arizona and sending strong winds through Flagstaff, Mesa, and the Phoenix area, the Associated Press reported.
The National Weather Service issued multiple warnings and tornado watches as the system came off the California coast. Homes and vehicles took hits. Trees fell. And meteorologists warned that heavy rain and flash flooding still threatened the Phoenix metro area into Thursday morning.
For a state more used to dry heat than spinning storms this late in the year, the setup stood out.
The hail was not pea-sized nuisance ice. It was golf ball-sized stone, large enough to pummel roofs, shatter windows, and dent cars across northern and central Arizona.
Strong winds added to the mess. In Mesa, toppled trees landed on walls and carports. In and around Flagstaff, gusts knocked down timber hard enough to draw blunt comment from the weather office.
A few dozen ponderosa pines more than 30 feet tall fell in the Coconino National Forest northwest of Flagstaff. Those were not weak saplings giving way in a light breeze.
Ryan Bernhart, a National Weather Service meteorologist in Flagstaff, put it plainly.
"These are not small trees that are down,"
He added a second point that left little room for spin.
"These are pretty strong trees that had been knocked down."
Property owners were left with the bill that always follows when ice and wind meet glass, metal, and wood. No injury count or damage total was given in the initial wire account. The physical record was still clear enough: roofs beaten, windows broken, cars scarred, and trees down on structures.
The National Weather Service put tornado watches up for multiple areas as the storms moved in. Arizona had not seen watches like that since October 2010.
That gap matters. Fifteen years without that kind of alert is a long stretch. When the watches finally returned, they came with a public push to take cover and stay away from windows.
Readers tracking broader severe weather will recognize the pattern from other recent Southwest alerts, including coverage of how millions face tornado threat when storm systems drench the region.
Bernhart explained the engine behind the threat. Warm, moist air moving north helped fuel storms coming off the California coast. Changing winds aloft can make those storms spin and create tornado conditions.
He also flagged the calendar problem.
"This is very unusual for this area at this time of the year,"
Unusual does not mean impossible. It means people and planners get less practice, and rare timing can catch households flat-footed.
Mark O’Malley, a meteorologist at the weather service office in Phoenix, said the greatest threat to the Phoenix metro area was heavy rainfall and flash flooding through the night and into Thursday morning.
Hail and wind did the early damage farther north and across parts of the metro fringe. Water was the next hazard on the list. Dry washes and hard desert ground do not absorb a sudden dump of rain the way a soft lawn might. Runoff rises fast.
That flood concern fits a wider stretch of Pacific moisture and Southwest storm risk described in reporting on flash flood risk across the Four Corners as related systems move inland.
A lightning strike was also recorded Tuesday in Chandler, underscoring how active the sky was as the system worked east off the coast.
Storms that start over California often carry mixed consequences, rain that can ease wildfire ground in one place and overload washes in another. That same corridor has been watched closely in pieces on rain relief across California wildfire zones when Pacific systems push inland.
The National Weather Service’s job in the moment was direct: issue the warnings, hoist the tornado watches, and tell people to seek shelter and stay away from windows. Local residents and businesses then inherit the aftermath, boarded glass, bruised vehicles, cut-up limbs, and insurance calls.
No confirmed tornado touchdowns, road closures, school shutdowns, or emergency declarations appeared in the initial account. What did appear was enough: large hail, damaging wind, downed mature pines, and a live flash-flood threat hanging over the state’s largest metro area.
Pacific-driven storm trains have put huge populations under water risk in other recent stretches, including periods when more than 150 million faced flood threat as moisture spread across large parts of the country.
Arizona’s episode was narrower in footprint and still costly on the ground it hit. Golf ball ice does not need a statewide map to ruin a roof or a windshield.
Farther south along the broader coastal storm belt, heavy weather has also battered communities beyond the U.S. border, as seen when storms left five dead and a hurricane threat loomed over western Mexico. Different systems. Same hard lesson about water, wind, and unforgiving timing.
When rare October hail starts breaking glass in the desert, the sober response is simple: heed the watch, protect life and property, and deal in facts, not wishful calendars.
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