Northwest Washington under a winter weather advisory until Sunday morning

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On Friday at 9:24 a.m. the NWS Seattle WA issued a winter weather advisory valid from 11 a.m. until Sunday 8 a.m. The advisory is for Cascades of Whatcom and Skagit counties, Cascades of Snohomish and Northern King counties, Cascades of Southern King County, Cascades of Pierce and Lewis counties and Olympics.

"Snow showers expected. Total snow accumulations of 4 to 6 inches above 4000 feet, with higher amounts possible in the high terrain," states the NWS. "Expect cold conditions in the mountains. The highest chances for heavy showers will occur Friday afternoon and again Saturday afternoon. These showers could be accompanied by lighting and small hail."

"Late season snow showers in the mountains may impact those enjoying outdoor recreation in the mountains above 4000 feet Friday through Saturday night. Warm road temperatures may limit roadway accumulations. However, temporary road accumulations will be possible in heavy snow showers," adds the NWS. "Slow down and use caution while driving during or after heavy showers. Those recreating above 4000 feet should be aware of the potential for snow showers and thunderstorms. Have a plan for how to find safety and know where and how fast you can find shelter."

This advisory is in effect until Sunday at 8 a.m.

Winter weather driving tips from the NWS

On average, weather-related vehicle crashes kill more than 6,000 people nationwide and injure more than 480,000 people each year. Slow down to stay safe if you must travel during periods of snow or freezing rain. If the temperature outside is near freezing, it is safest to assume ice is present on roadways and drive accordingly. If there is ice on power lines or tree branches, the weight may cause them to snap and fall. Avoid driving during those conditions if possible. If you must go out, choose a route with the least number of trees and power lines. Never touch a downed power line, and call 911 if you encounter one. Here are some additional winter weather driving tips:

• If you must travel out of town, and dangerous winter weather conditions are expected, be sure to tell your family or friends where you are going, your intended route, and the time of arrival.
• Make sure your gas tank is full. Carry a windshield scraper, jumper cables, a small shovel, flashlight, cell phone, blanket and additional warm clothing, drinking water, and high-calorie non-perishable food.
• Don't panic if you become stranded. Call someone to let them know you are stranded. Do not try to walk to safety. Attach a cloth to your car antenna or mirror to indicate you need help. Use the dome light and flashers to make your vehicle more noticeable.
• Be alert for snow plows, and allow plenty of room for them to pass. If you are going around a plow, only do so when you can see the road ahead of the plow.
• Check road conditions before you depart.

Source: The National Weather Service

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This story was originally published May 15, 2026 at 9:28 AM.