radar image of storm approaching west coast
The remnants of West Pacific Typhoon Merbok will amplify a ridge in the Gulf of Alaska, subsequently resulting in a seasonally very unusual downstream trough and associated low pressure system that will bring significant precipitation to Northern California on Sunday and Monday. Credit: Weather West / Weather West

Weather West forecasts that rain is coming this weekend:

The rain expected this weekend is, quite frankly, excellent news from a short-term wildfire risk perspective in the northern half of California. Sep-Oct are increasingly seen as the peak of fire season in NorCal, so this event could not be better timed from that perspective. And it is likely to help substantially tamp down the ongoing Mosquito Fire on the Sierra west slope–probably extinguishing pockets of the fire entirely, although some areas in heavy and drought-killed fuels will likely continue burning or smoldering until after the rain event, and could pop back to life then.

This is part of a much-longer discussion of this summer’s weather and heat wave, which is well worth reading.