Monsoonal air shifting towards North Bay

The sky over the Bay Area was less bright than usual on an otherwise typical summer afternoon on Sunday, a reminder that monsoon conditions were moving towards the region from the southern part of the state.

According to forecasters from the National Weather Service, the development was unlikely to cause problems.

The most obvious development was the increase in high clouds in the area, which created a slightly more sultry feel and shifted from the clear blue sky that covered the area on Saturday.

Quite a contrast between the dry air that sits just above the marine boundary layer and the humid, mid-altitude monsoon air that flows north today. A small chance for isolated showers and T-storms 🌦️ for our region from Monday to Tuesday. #CaWx #BayArea pic.twitter.com/htIFmeb2OS

– NWS Bay Area (@NWSBayArea) July 25, 2021

In its forecast, the weather service said dry air lay over the sea layer, which generally covers the coast. The monsoon air moved north towards this system.

Air quality remained good to moderate throughout the Bay Area. Closer to Lake Tahoe it was bad because smoke from the Fly and Dixie fires was building up in Counties Butte and Plumas.

According to the weather service, the consequence was the low chance of isolated showers and thunderstorms in the north bay until Monday night. The rest of the region is expected to remain warm with high clouds, with peaks hitting the high 90s by Tuesday night in the far inland areas by Tuesday.

Maybe not the best morning to sit outside and enjoy the view. The air quality in the region remains poor due to smoke. Latest readings: https://t.co/YZGiBS1emn. Smoking behavior today should be similar to yesterday, with some improvement from noon to early evening. pic.twitter.com/l9dqxQZwzg

– NWS Reno (@NWSReno) July 25, 2021