Air Quality Forecast

June 19 – June 23: Beginning Friday afternoon, a low-pressure system over the PNW will extend over Northern California forcing a slight cool down as the weekend progresses.  As the trough moves in over the area, compression of pressure gradients will make for breezy conditions, especially in high elevations and the Salinas Valley.  No wind advisory from the NWS as of Thursday morning, however that may change.  Onshore flow combined with windy conditions indicates a rather robust marine layer this weekend which should burn off at inland locations by the afternoon but may persist throughout the day at the coast further limiting warming in those areas.  Temperatures will range from the high-40s to the mid-70s at the coast and high-40s to the mid-80s inland. Ozone levels should remain below State standards, therefore ozone AQIs will remain GOOD.  Gusty conditions in the Salinas Valley could elevate PM10 (dust) AQIs to MODERATE. Low-pressure should help ventilate any accumulated PM2.5 (smoke), however wildfires around the state and in Canada could bring local AQIs to MODERATE.

Particulate Matter Sensor Network

Regulatory Air Monitoring Stations