A small trough of low pressure moved over the Pacific Northwest on this first day of autumn, and it brought more gusty wind and an improvement to the air quality for most of us. The breezes will continue through the week, and other changes are coming soon. Tonight will be another mostly clear to clear night with some areas of smoke and haze in the sky. Lows will range from the 30s and 40s in the mountains to the 50s and 60s in the foothills and valley. Wednesday will be another mostly sunny, breezy and warm day with areas of smoke continuing to plague some areas. Highs will range from the mid 70s and lower 80s in the mountains to the 80s and lower 90s in the foothills and the valley.
A trough of low pressure and the jet stream will sag over the Pacific Northwest and northern California for the latter half of the week. We can expect more breezy to locally windy weather through Friday with a slight chance for light rain showers over the northern mountains on Thursday. We will receive a lot more wind than rain, however. This weekend and early next week a strong ridge of high pressure will build over the western United States, and it will bring much hotter weather with downsloping wind, and that will unfortunately bring higher fire danger through Monday. Highs will rise from the 80s and 90s through Friday to the 90s and lower 100s this weekend and early next week.