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Primary air pollutant in the Sierra Brooks area:
PM2.5 - 6 Good
Enjoy your outdoor activities.
Sunday, September 6: As a trough of low pressure aloft passes over the Portola region, southwesterly surface winds will promote mixing and disperse pollutants. Thus, AQI levels will be Good. Labor Day, September 7: As the upper-level trough departs eastward, atmospheric mixing will decrease. Furthermore, light and variable surface winds will reduce dispersion. However, low carryover from the previous days will keep AQI levels Good. Tuesday, easterly winds will aid dispersion in the Portola region. Additionally, warm afternoon temperatures will promote mixing, allowing AQI levels to remain Good. Wednesday, light and variable winds will inhibit dispersion. However, afternoon high temperatures in the low-80s will aid mixing. Therefore, AQI levels will be high-Good. Thursday and Friday, westerly to west-southwesterly winds will strengthen, increasing dispersion. In addition, temperatures around 80-85F will continue to promote mixing. Thus, AQI levels will be Good on both days.
Primary Pollutant: PM2.5 - 28 Good
Primary Pollutant: PM2.5 - 39 Good
Primary Pollutant: PM2.5 - 33 Good
Primary Pollutant: PM2.5 - 44 Good
Primary Pollutant: PM2.5 - 33 Good
Primary Pollutant: PM2.5 - 33 Good