Chief Meteorologist Justin Stapleton‘s Daily Forecast Discussion:
Some light showers will continue through much of the evening as a cold front moves through the state. However, once it passes late tonight, that’s it for the rest of the week! High pressure moves back in and some folks will be treated to a sunny forecast for Christmas, but others might see a “coal” forecast stuck in the fog for the next couple of days.
Tomorrow, high pressure starts to move back in across the Pacific Northwest with some morning fog, then back to partly sunny skies in the afternoon. Highs will be a bit cooler in the 40s. By Christmas, the coast and mountaisn should see a beautiful Christmas forecast with sunny skies and highs climbing back into the 50s. However, the valleys aren’t likely to be as lucky. An inversion will set up with cold air trapping the fog in the valley, keeping the sun away and highs struggling to reach 40 for much of the week. Overnight lows will dip into the 20s again so areas of patchy freezing fog will also be an issue in the mornings.
Traveling over the mountains should be fine over the next couple of days, as well as down into California. As we head into the weekend, the inversion will continue for most of the valleys, however, we might be able to break out some late afternoon sun by Saturday and Sunday. As you might expect, air quality will be an issue throughout the week, an Air Stagnation Advisory has been issued for the Willamette Valley.
Have a great Tuesday and holiday!
- Chief Meteorologist Justin Stapleton
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