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Wet spring snows hit Rockies, Nebraska

Cassandra Cantu shielded her 7-week-old puppy, Kamala, from the snow at a dog park in Colorado Springs on Sunday.

Mark Reis/The Gazette via AP

Cassandra Cantu shielded her 7-week-old puppy, Kamala, from the snow at a dog park in Colorado Springs on Sunday.

DENVER — Much of Interstate 80 in southern Wyoming was closed Monday after a spring storm brought up to 3 feet of snow to the Rockies as severe thunderstorms and tornadoes hit the Midwest.

A flash flood watch was in effect for portions of Oklahoma and Arkansas, where more than 4 inches of rain were possible.

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Meanwhile, residents in eastern Nebraska were cleaning up from Sunday’s thunderstorms and twisters, which ripped roofs off homes and toppled buildings but caused no major injuries. People in the western Panhandle woke up to a blanket of heavy, wet snow.

In Wyoming, a 180-mile stretch of I-80 was closed between the Nebraska state line and Rawlins. Another 200 miles of eastbound I-80 between the Utah state line and Rawlins also was closed because of snow and blowing snow.

In Colorado, the snow that began falling on Mother’s Day caused some power outages as it weighed down newly greening trees.

Among those affected by the outages was Denver International Airport, where some escalators and elevators temporarily stalled Monday morning. Airport spokeswoman Julie Smith said a backup generator spared the airport any major problems.

In the West, high winds at the bottom of the storm sent dust blowing across Arizona and New Mexico, and the Los Angeles area had been under ‘‘red flag’’ fire warnings, with authorities saying blazes could quickly spread out of control under low humidity, gusty winds, and dry conditions.

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