WASHINGTON — By Saturday morning, light rain will linger in parts of northern Western Washington as a low-pressure system slides through.
Those showers will gradually drift south through midday, but they’ll fade as they do. By afternoon, most locations should be drying out, with at least a few breaks of sunshine returning. It will feel noticeably cooler, though, with highs struggling to reach 60°.
Snow levels will tumble to around 4,500 to 5,000 feet by Saturday. That’s low enough for a quick dusting of snow at places like Paradise on Mount Rainier and across the highest terrain of the North Cascades.
Lower highway passes, including Snoqualmie and Stevens, should see mostly light rain instead. And when I say light, I mean light.
Sunday and Monday bring a drier stretch with more sunshine, but temperatures will remain firmly in fall mode. Afternoon highs will stay in the upper 50s to lower 60s, while overnight lows drop into the lower 40s across the lowlands.
Outlying valleys, foothills, and mountain passes will dip into the upper 30s as early as Sunday morning, creating the potential for patchy frost.
Frost Advisories have been issued for some of these colder spots, though not for the more urban communities closer to the water.
The coldest temperatures will be in Pierce and Thurston counties near the Cascades, along the I-5 corridor in Lewis County, and from Shelton southwest through Elma and Montesano. A few locations could flirt with the freezing mark by daybreak.
If you have sensitive plants, take precautions now. Cover them up or move them indoors if possible, especially in Frost Advisory areas. The greatest frost threat will be Sunday and Monday mornings.
Looking ahead, Tuesday appears mainly dry, with a chance of a few showers returning Wednesday. Temperatures stay on the cool side through much of next week, with highs generally in the 60s around Seattle. Some signs suggest we could push back into the upper 60s toward the end of the week.