A powerful storm that pummeled much of the West is promising to bring its chaotic mix of snow, sleet and ice to much of the Dakotas on Thanksgiving Day.
The system closed roads and delayed flights from Anchorage to Salt Lake City on some of the busiest travel days of the year.
Meteorologists warned residents in the Dakotas to expect a range of messy wintry weather, from freezing drizzle in the eastern two-thirds of South Dakota to a possible blizzard in eastern North Dakota.
"Like the Boy Scouts, you've got to be prepared for a North Dakota winter or you're asking for your own problems," said Gerald Miller, 52, who plowed roads on his farm just east of Bismarck on Wednesday.
Miller has spent every winter of his life in North Dakota except for one in 2003 when he served in Iraq with the National Guard. "After Iraq, I promised I'd never complain about the weather in North Dakota again," he said.
Blowing snow was likely to cause problems for holiday travelers even in areas not expected to get significant amounts.
"We have snow on the ground in many areas, and any snow on top of that will combine for the potential to blow around, reduce visibility and drift, and cause problems for people trying to drive," meteorologist Jeff Savadel said.
State officials in both Dakotas issued statements urging people to be cautious.
In South Dakota, truckers carefully navigated the icy roads, with snow expected later in the day.
"It's getting bad," said Bob Grape, who had stopped at a gas station in Sioux Falls on his way north. Grape said he would keep moving through the weather unless it got significantly worse.
"There isn't a load of freight that's important enough to risk your life," he said.
In Iowa, at least three people died in weather-related crashes as freezing rain and drizzle left roads with a light glaze.
There were 23 accidents during the day Wednesday, police said. State officials say many northern Iowa roads were covered with ice and many schools in the region were closed early.
The storm crippled much of the Pacific Northwest Monday and Tuesday, and at least three deaths in Washington state have been blamed on the storm, including a man struck and killed outside his car Monday night on snowy Interstate 5 in Tacoma. On Wednesday, the temperature at Sea-Tac Airport dropped to 14 degrees, a 25-year low.
Officials in Portland, Ore., also were investigating whether a man whose body was found along the Willamette River died from the cold.
The storm shut down highways for a time in Idaho, Wyoming and Utah, and brought high winds on Wednesday to New Mexico and northern Arizona.
The roads were less chaotic in Utah on Wednesday. On Tuesday night, there were 118 traffic collisions and 119 vehicles that slid off the road, police said.
National Weather Service snow totals showed that it wasn't the quantity of snow that made for treacherous driving.
Most cities in Utah received less than 6 inches in the previous 24 hours — an amount residents here are accustomed to. Instead, the danger largely came from high winds blowing snow at night that made it difficult.
"A lot of people heeded the message, stayed off the road and cut down on a lot of problems," Utah Highway Patrol Trooper Todd Johnson said Wednesday. "The crash figures — they're not as high as I expected them to be."
The storm left 3 to 6 inches of snow in Utah's mountain valleys and up to 17 inches in the Wasatch mountains, NWS meteorologist Mike Seaman said.
"We're left with this unseasonably cold arctic air mass," Seaman said Wednesday. "We're looking at temperatures in the teens and the first hard freeze of the year for southern Utah."
Even cold-hardened Alaskans were complaining about the weather, with freezing rain making travel hazardous if not impossible. Fairbanks was among the hardest-hit; schools closed and most government agencies and military bases told nonessential workers to stay home.
"I don't think the roads can get much worse," said David Gibbs, emergency operations director for the Fairbanks North Star Borough.
Andy Haner, a weather service meteorologist in Seattle, said the storm blew down from Alaska before turning toward the Northern Rockies. Forecasters say western Washington temperatures should rise above freezing for Thanksgiving, while eastern Washington faces a chance of snow and temperatures below freezing through the weekend.
"Sometimes we call them 'inside sliders' because they slide down the Inside Passage from Alaska," he said.
