tips
Forecast By County
Wednesday, March 04
Wed Thu
Placer
53
61
Sacramento
53
66
Yolo-Solano
53
63

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 (PST)

A "!" next to a forecast means a Spare The Air Day has been declared for that day.
 
Forecast: AQI   Pollutant
Wed. March 04, 2015:
 53 
PM2.5    
Thu. March 05, 2015:
 66 
PM2.5    
 
Extended Forecast: Condition Pollutant
Fri. March 06, 2015:
Moderate  Moderate
PM2.5    
Sat. March 07, 2015:
Moderate  Moderate
PM2.5    
Sun. March 08, 2015:
Moderate  Moderate
PM2.5    
Mon. March 09, 2015:
Moderate  Moderate
PM2.5    
 
Actual: AQI   Pollutant
Tue. March 03, 2015:
 46 
PM2.5    

Weather Conditions:
Wednesday through Friday, an upper-level ridge of high pressure will build over northern California, reducing vertical mixing in the atmosphere. In addition, light winds at the surface will limit pollutant dispersion. These conditions will lead to Moderate particle levels on all three days.