Associated Press

Storms encase Iowa and eastern Nebraska in ice and generate rare tornado warning in San Francisco

A large tree branch lays across a street in Seaside, Calif., Saturday, Dec. 14, 2024. (AP Photo/Nic Coury)

OMAHA, Neb. (AP) — A major ice storm created treacherous driving conditions across Iowa and eastern Nebraska this weekend and prompted temporary closures of Interstate 80 after numerous cars and trucks slid off the road.

Many events were canceled across the region when the storm hit Friday evening, and businesses announced plans to open late Saturday as officials urged people to stay home if possible. Temperatures were expected to rise high enough in the afternoon to melt the ice in most places, however.

“Luckily some warmer air is moving in behind this to make it temporary,” said Dave Cousins, a meteorologist with the National Weather Service's office in Davenport, Iowa.

At least one person died in a crash caused by the icy roads in eastern Nebraska. The Washington County Sheriff's office said a 57-year-old woman died after she lost control of her pickup on Highway 30 near Arlington and hit an oncoming truck. The other driver sustained minor injuries.

Elsewhere a storm and wind gusts of up to 60 mph (96 kph) prompted the first tornado warning in San Francisco and caused some damage. Parts of neighboring San Mateo County were also included in the warning, which went out at 5:51 a.m. to about 1 million people in the area. It was lifted by 6:15 a.m.

The storm toppled some trees onto cars and streets and damaged some roofs in San Francisco, which has not seen a tornado since 2005, according to the Weather Service. The damage was being assessed to determine if there was indeed a tornado.

“This was the first ever warning for a possible tornado in San Francisco. I would guess there wasn’t a clear signature on radar for a warning in 2005,” said Roger Gass, a meteorologist in the Weather Service's Monterey, California. He said he was not there in 2005.

The fast-moving storm prompted warnings for residents to take shelter, but few people have basements in the area.

“The biggest thing that we tell people in the city is to put as many walls between you and the outside as possible,” Meteorologist Dalton Behringer said.

In upstate New York, people were digging out after heavy snow fell. More than 33 inches (84 centimeters) was reported near Orchard Park, where residents are used to dealing with lake-effect snow this time of year.

And in Nevada, up to 3 feet (91 centimeters) of snow was forecast for Sierra Nevada mountaintops, with a winter storm warning in effect through 10 p.m. More than a foot fell at some Lake Tahoe ski resorts, according to the National Weather Service's Reno office.

Interstate 80 was closed for about an 80-mile (130-kilometer) stretch from Applegate, California, to the Nevada state line just west of Reno, where rain was falling and a winter weather advisory remained in effect through the afternoon.

___

Associated Press reporters Julie Walker in New York and Scott Sonner in Reno, Nevada, contributed.

A man clears downed trees near his house in Seaside, Calif., Saturday, Dec. 14, 2024. (AP Photo/Nic Coury)
A car is damaged by a fallen tree in Monterey, Calif., Saturday, Dec. 14, 2024. (AP Photo/Nic Coury)
A large tree branch crashed into a garage near Coe Avenue in Seaside, Calif., Saturday, Dec. 14, 2024. (AP Photo/Nic Coury)
A truck is damaged after a large tree fell across a street in Seaside, Calif., Saturday, Dec. 14, 2024. (AP Photo/Nic Coury)
Power lines damaged from a fallen tree are seen across Sylan Road in Monterey, Calif., Saturday, Dec. 14, 2024. (AP Photo/Nic Coury)
This image, provided by the Livermore Police Dept. shows flooding near the intersection of Murrieta Blvd. and Stanley Blvd. during a storm Saturday, Dec. 14, 2024 in Livermore, Calif. (Livermore Police Dept. via AP)
A cyclist looks at a large tree that took out power lines as it fell across Sylan Road in Monterey, Calif., Saturday, Dec. 14, 2024. (AP Photo/Nic Coury)
Headlights from a stranded motorist highlight freezing rain that coated surfaces in Omaha, Neb. on Friday, Dec. 13, 2024. (Chris Machian/Omaha World-Herald via AP)
A car gets stuck trying to go up an icy Pacific Street during freezing rain in Omaha, Neb. on Friday, Dec. 13, 2024. (Chris Machian/Omaha World-Herald via AP)
A man spreads salt on 42nd Street near Pacific Street after freezing rain coated surfaces with ice in Omaha, Neb. on Friday, Dec. 13, 2024. (Chris Machian/Omaha World-Herald via AP)
People observe the New York skyline from Top of the Rock's Skylift, Friday, Dec. 13, 2024, in New York. (AP Photo/Julia Demaree Nikhinson)