The weekend is here, and so is the sun. We’re going to start out the morning with cool Fall temperatures, then feel the heat as daytime highs climb well above average for this time of year, resembling Summer in the afternoon. High pressure is again building over the Pacific Northwest. This will minimize cloud cover away from the beach.
The warm air at the surface will keep overnight lows above average as well, helping to build a thermal trough from California into Oregon. Temperatures will climb into the 90s for many of the valleys in Southern Oregon and Northern California, which sounds normal for summer but is actually above average for this late in September.
Smoke from the numerous fires in the West will drift in many different directions, reducing air quality for cities located downwind. A slight shift in the wind direction can clean and clear the air very quickly. Temperatures remain much above average through the weekend, and it looks like it will be the middle of next week before valley temperatures ‘only’ rise into the mid-80s, which is still above-average.