Forecast By County
Friday, November 28
Fri Sat
Placer
55
55
Sacramento
82
72
Yolo-Solano
74
68

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
Fri. November 28, 2014:
 82 
PM2.5    
Sat. November 29, 2014:
 72 
PM2.5    
 
Extended Forecast: Condition Pollutant
Sun. November 30, 2014:
Good  Good
PM2.5    
Mon. December 01, 2014:
Good  Good
PM2.5    
Tue. December 02, 2014:
Good  Good
PM2.5    
Wed. December 03, 2014:
Good  Good
PM2.5    
 
Actual: AQI   Pollutant
Thu. November 27, 2014:
 88 
PM2.5    

Weather Conditions:
Friday, light winds during the morning hours will limit pollutant dispersion in the Sacramento region, and moisture associated with fog will enhance particle formation. However, light to moderate onshore winds during the afternoon and evening hours will help to disperse pollutants. As a result, particle levels will be Moderate. Saturday, an upper-level trough of low pressure approaching from the west will enhance atmospheric mixing and produce moderate southerly winds in the Sacramento region, helping to disperse pollutants. However, moisture associated with light rain and fog will continue to support particle formation, resulting in Moderate particle levels. Sunday, the upper-level trough will continue to enhance atmospheric mixing in the Sacramento region, and moderate winds will help to disperse pollutants, yielding Good particle levels in the Sacramento region.