Thunder Rumbles Over Flagstaff as Winter Weather Hits

The sound of thunder rumbled over Flagstaff, Arizona, late on Monday, October 11, as snow and graupel (granular snow pellets also called “soft hail”) showered the city.

The National Weather Service’s office in Flagstaff posted this video at around 10:15 pm on Monday and said it showed “a good graupel shower” with “a little thunder in the background.” The weather service warned drivers on Interstate 40 and Interstate 17 near Flagstaff that the graupel could make roads slick.

Just six minutes later, the weather service tweeted that snow had started to fall around their Flagstaff office. Credit: NWS Flagstaff via Storyful

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