Archive note, Nov. 1, 2026: The 1–10 a.m. PST advisory period described below has passed. Check NWS Seattle for current forecasts and alerts. The original report follows.
Drivers in Marysville, Everett and Lake Stevens should plan for possible low visibility Sunday morning, Nov. 1. A National Weather Service dense fog advisory for the area is scheduled for 1 a.m. to 10 a.m. Pacific Standard Time.
The NWS Seattle advisory, updated at 8:29 p.m. PDT Saturday, forecasts visibility of a quarter-mile or less in dense fog. It includes the Downtown Everett/Marysville and Shoreline/Lynnwood/South Everett forecast areas, and specifically lists Lake Stevens among the affected communities.
Forecasters expect fog to develop overnight and continue into Sunday morning across parts of Puget Sound. The advisory also allows for localized freezing fog as temperatures fall into the 30s. Those are forecast possibilities; conditions can vary along a morning drive.
The time change matters for anyone heading out early. Daylight saving time ends Sunday: at 2 a.m. PDT, clocks move back to 1 a.m. PST. The advisory's 1 a.m. start refers to that second 1 a.m., after the clocks change.
For foggy travel, NWS safety guidance recommends slowing down, allowing extra travel time and leaving more room behind the vehicle ahead. Use low-beam headlights so other drivers can see your vehicle. High beams can produce glare and make the road ahead harder to see.
If visibility becomes nearly zero, the weather service recommends finding a safe place to stop, such as a parking lot. Check the latest NWS Seattle forecast and alerts before leaving, especially if your plans involve an early start. The advisory is scheduled to end at 10 a.m. PST Sunday, Nov. 1; check for updates as the morning develops.
