tips
Forecast By County
Friday, April 17
Fri Sat
Placer
46
53
Sacramento
53
55
Yolo-Solano
42
50

The map below is a 1-hour snapshot. Click to view all hours recorded since midnight.
Current map

Forecast will be issued daily by noon (PDT)

A "!" next to a forecast means a Spare The Air Day has been declared for that day.
 
Forecast: AQI   Pollutant
Fri. April 17, 2015:
 53 
PM2.5    
Sat. April 18, 2015:
 55 
PM2.5    
 
Extended Forecast: Condition Pollutant
Sun. April 19, 2015:
Moderate  Moderate
PM2.5    
Mon. April 20, 2015:
Good  Good
PM2.5    
Tue. April 21, 2015:
Good  Good
PM2.5    
Wed. April 22, 2015:
Good  Good
PM2.5    
 
Actual: AQI   Pollutant
Thu. April 16, 2015:
 71 
Ozone    

Weather Conditions:
Friday through Sunday, an upper-level ridge of high pressure over northern California will reduce mixing in the atmosphere, and light onshore flow at the surface will inhibit pollutant dispersion. As a result, particle levels will be low-Moderate on all three days.