Seattle Braces for Deep Freeze as Cold Advisory Expands Across Western Washington

Seattle Braces for Deep Freeze as Cold Advisory Expands Across Western Washington

Seattle Braces for Deep Freeze as Cold Advisory Expands Across Western Washington

Western Washington is waking up to a sharp reminder that winter is far from over, as a cold weather advisory stretches across the Puget Sound and pushes temperatures to some of the lowest levels seen this season. Forecasters say the most dangerous window runs through early Sunday morning, when overnight lows are expected to drop into the low to mid 20s and in some spots even colder than that.

This advisory now covers a wide swath of the region. From Everett and Marysville in the north, through Seattle and the Eastside and all the way down toward Olympia and surrounding lowland communities. Areas away from the moderating influence of the water are expected to feel the cold most intensely and that is where the risks rise quickly.

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The concern here is not just discomfort. Prolonged exposure in these temperatures can lead to frostbite or hypothermia, especially for people without adequate heating, those experiencing homelessness and anyone spending long hours outdoors. Pets, pipes and unprotected plants are also vulnerable when temperatures stay this low for several hours.

The reason behind this cold snap is a strong area of high pressure sitting offshore. It is keeping the region dry, but it is also allowing heat to escape rapidly overnight. Winds are expected to ease late Saturday night, which may sound like good news, but calmer air can actually make things worse. Without wind to mix the atmosphere, temperatures can fall even faster and patchy freezing fog may form in fog-prone areas by early Sunday.

Sunday morning is expected to be the coldest point of the weekend. Conditions will improve later in the day, with afternoon highs climbing into the low to mid 40s under filtered sunshine. But once the sun goes down, temperatures will fall quickly again, keeping the region in a cycle of cold mornings and chilly nights.

This cold stretch is also arriving during an unusually dry period. Seattle has gone more than a week without measurable rain, putting January on track to challenge local records for dryness. While that may sound appealing to some, it raises concerns about mountain snowpack, which is already lagging behind normal levels and plays a crucial role in the region’s water supply later in the year.

For now, the message from forecasters is clear. Take the cold seriously, check on vulnerable neighbors, protect pets and property and be prepared for icy conditions during the early morning hours. Stay with us as we continue to track this developing pattern and bring you the latest updates around the clock.

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