AirNow · California
Air quality in Portola
Right now22Good
Air quality is good. It's a fine day to be outside. Main pollutant: fine particles (PM2.5). Measured 17:00 PDT.
Forecast
Today
fine particles (PM2.5)22 · Good
fine particles (PM2.5)22 · Good
Thu, Oct 8
fine particles (PM2.5)33 · Good
fine particles (PM2.5)33 · Good
Fri, Oct 9
fine particles (PM2.5)22 · Good
fine particles (PM2.5)22 · Good
Sat, Oct 10
fine particles (PM2.5)33 · Good
fine particles (PM2.5)33 · Good
Forecaster's note
Wednesday, October 7 and Thursday, October 8: As an upper-level ridge of high pressure builds over northern California, atmospheric mixing will decrease slightly. Additionally, calm to light winds throughout the period will lead to pollutant build-up in Portola. However, unseasonably warm surface temperatures will aid low-level mixing and limit residential wood burning, leading to Good AQI levels on both days. Friday and Saturday, moderate southwesterly winds will disperse pollutants as a trough of low pressure aloft develops along the West Coast. As a result, AQI levels will be Good on both
From AirNow (forecast by Northern Sierra AQMD), checked every 30 minutes. Current readings are preliminary.