We finally have cooler weather arriving across northern California today, and air quality impacts are expected to stay fairly low! Low pressure to our south (the remnants of hurricane Marie) will give us cooler temperatures and moderate southeast winds across most of our region today. Air quality is starting out in the good to moderate range for our entire area this morning, but bigger impacts are just to our north and west. We'll see the potential for some bigger impacts in Trinity County this afternoon, but most of us will continue to have decent air quality. Temperatures are starting out in the 50's to 60's in the valley and foothills, while mountain areas are starting out in the 30's to 40's this morning. Light winds out of the north are expected early today, but we'll have the return of southeast winds to around 10mph this afternoon. Humidity is expected to stay a little higher today, with valley areas dippint into the 20 to 35 percent range, and some higher elevations dipping into the 15 to 25 percent range. Temperatures will end up in the upper 70's to low 80's in the valley this afternoon, while mountain and foothill areas mostly top out in the high 60's to mid 70's. The cooler temperatures and the uptick in humidity is good news for fire danger, and will result in us staying in the moderate to high range this afternoon.
The cooling will continue through Saturday, when valley areas are mostly expected to end up in the low to mid 70's. Foothill and mountain areas can expect high temperatures in the mid 60's on Saturday afternoon. The potential for showers will not be likely on Friday as the latest models keep low pressure to our south, but there will be a decent chance for at least some light showers brushing across our higher elevations on Saturday as another area of low pressure tracks across the Pacific Northwest. Models are mostly keeping the valley dry this weekend, but there will be a slight chance for some very light precipitation in the northern zones. The low to our north will track to the east of our region on Sunday, and high pressure will build back into northern California from the Pacific. This will result in a moderate warming trend and the return of stronger north winds. Humidity will also become lower for the start of next week. The dry, warmer, and windy conditions will bring elevated fire danger concerns back into our forecast starting on Sunday and lasting through at least Tuesday. Models are showing a wet system well to our north on Tuesday into Wednesday of next week. The latest projections keep any chance for wet weather from that system to our north, but it's something we will be keeping a close eye on through your extended forecast. Valley temperatures will return to the low to mid 80's early to mid week next week, while foothill and mountain areas mostly climb back into the 70's. Enjoy the much cooler weather while it lasts as it's not expected to last for long.