Snow, freezing rain challenge drivers on WA mountain passes

As snow continues to blanket Washington’s mountain passes, the Washington State Department of Transportation is urging drivers to exercise caution and adhere to winter driving requirements. This comes as the region braces for the first major winter weather event of the season.

"Our crews are trying to keep the pass open, but again, we also need drivers to obey those traction tire requirements and to make sure that they're slowing down," said WSDOT spokesperson Megan Lott.

WSDOT crews are out in full force, applying deicer and plowing snow to keep roads passable.

"We just need drivers to make sure that they're prepared if they're driving in these conditions by taking it slow and making sure that they obey the traction tire requirement," said Lott.

Earlier Tuesday, eastbound I-90 was closed just west of the Snoqualmie summit due to a semi-truck spinout. The truck, which lacked chains, stalled and caused significant delays. Chains are mandatory for vehicles over 10,000 pounds gross vehicle weight during such conditions, including semi-trucks and vehicles towing trailers or RVs.

Traffic crawled at just 2 to 3 mph up I-90 as drivers passed through chain checkpoints. Many were soon dusted with fresh snow, adding to the challenges of navigating the slick roads.

"It’s pretty nasty, so everybody needs to go slow. Don’t make any sudden movements. If you do, you’re just going to slide," said Ricky Thomas, an auto maintenance warrant officer for the state's National Guard.

The holiday season is expected to bring a surge in travel through the passes, especially as opening day at the Summit at Snoqualmie draws visitors. Despite the fresh powder, which measured up to six inches in some areas on Tuesday morning, drivers faced long delays and hazardous conditions.

"It only takes one person to spin out and ruin it for everyone else," said Lott.

What to know before hitting the passes

With freezing rain expected to develop later tonight, WSDOT anticipates worsening conditions on I-90, as well as Routes 2, 12, 97, and Stevens and Snoqualmie passes. Lott advised drivers to plan ahead and carry essential supplies, such as blankets, warm clothing, food, water, and medication.

WSDOT crews will maintain 24/7 coverage on I-90 throughout the winter season, deploying snowplows, graders, and snow blowers as needed.

"While we’re doing our part to keep the passes open, drivers need to do theirs by following traction tire requirements and reducing speed," said Lott.

Officials urge drivers to remember these key tips:

  • Obey Traction Tire and Chain Requirements: Chains are mandatory for vehicles over 10,000 pounds during adverse weather conditions. SUVs and passenger vehicles must carry chains, even if not immediately required
  • Slow Down: Adjust your speed to the conditions to maintain control on slick roads
  • Stay Prepared: Carry a winter emergency kit, including blankets, extra clothing, food, water, and a full tank of gas
  • Plan Ahead: Check pass conditions and WSDOT updates before hitting the road

Maria Pandolfo, who visited Snoqualmie Pass to enjoy the fresh snow, marveled at the winter wonderland. "We’re out here enjoying the fresh powder," she said. But while conditions may delight skiers and snowboarders, they’re a stark reminder for drivers to stay vigilant.

"Do you really need to go up there that bad? Can you stay home? Can you do something else that doesn’t take you over this pass with all this beautiful weather?" said Thomas.

With more snow and rain expected through Christmas, WSDOT’s message remains clear: drive slow, pack your chains, drive cautiously, and be prepared for delays.

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