The smoke and haze remained in place over northern California on Wednesday, but it was cooler and much more seasonable. The weather pattern is changing soon, and that will mean very different weather for us within days. A ridge of high pressure has been in control of our weather for quite some time, but it is being weakened by a trough of low pressure approaching from the Pacific. Our weather tonight will be similar to previous nights, with a clear sky above our layer of haze and smoke. Lows will range from the 30s and 40s in the mountains to the 50s and 60s in the valley. Thursday will also be clear, but hazy to smoky, and it will cool further. Highs will range from the 70s in the mountains to the 80s and lower 90s in the valley.
Friday will be similar to Thursday for northern California with a few clouds in the sky, similar amounts of haze and smoke, and temperatures slightly below average. A vigorous trough of low pressure will approach our region Saturday, and that will change our weather through early next week. We can expect increasing clouds and breezes Saturday, more clouds, stronger wind, and some areas of light rain Sunday, followed by fewer clouds and lingering breezes next Monday. Gusty wind is still possible Monday and Tuesday before more clouds arrive next Wednesday. Valley lows will range from the 50s to the 60s, while valley highs will fall from near 90 this week to the lower and mid 70s by Sunday before rising into the 80s next week.