PORTLAND, Oregon — An Air Stagnation Advisory is in effect for the valley this morning until at least the noon hour. Early air quality numbers are good to moderate. The stagnate air is due to a temperature inversion and light winds. The conditions are also responsible for the lack of clearing skies in some areas over the weekend. The temp inversion will end Monday night, meaning improved air quality is likely Tuesday.
The first part of Dr. Martin Luther King Junior Day is going to be cool and cloudy with areas of fog and valley temps in the 30s, but above freezing. Look for a mostly cloudy day with light winds and Portland highs holding in the mid to upper 40s.
I am tracking the chance of a few scattered showers later this evening and Tuesday. This is a weak system, not much wind and valley rain totals will average less than .15 inches, with snow levels lowering to near 4,000 feet. A separate push of moisture arrives Wednesday, bringing light rain and a 3rd event brings scattered showers Thursday. Right now, I expect a 3rd dry weekend in a row this Friday through Sunday.
Meteorologist Rod Hill, connect with me on FB
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