Unseasonably warm to hot weather continues for northern California as a ridge of high pressure stays in control of our weather. Wednesday's weather won't be too different from Tuesday's, but big changes are coming soon. Tonight will be another mostly clear to clear night with haze and smoke from our area wildfires. Overnight lows will range from the 30s and 40s in the mountains to the 50s and 60s in the foothills and the valley. Wednesday will be a mostly sunny to sunny day with areas of smoke and haze continuing to plague our area, but blue sky will be visible. Highs will be similar to what they were today, ranging from the upper 70s and 80s in the mountains to the upper 80s and lower 90s in the foothills and valley.
The ridge of high pressure over California and much of the West will begin to weaken as two areas of low pressure approach the West Coast as part of a larger trough. The first area of low pressure will begin increasing our clouds Thursday and early Friday with a chance for light rain late Friday. The second area of low pressure and the rest of the trough will push overhead Saturday, bringing a better chance for widespread light rain and high elevation light snow. Sunday through early next week we'll have a clearing of our sky with stronger breezes. Highs will fall dramatically for all areas through Saturday before rising again. Highs will drop from the 80s and 90s to the 50s in the mountains and 60s in the valley before warming again.