Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 36.08 N, longitude: 121.59 W.
Ozone concentrations are presented in parts per billion (PPB).
Public comments and suggestions are encouraged.
A FAQ page is available.
More information...
24Hr Maximum
Ending
Maximum 1 Hour Average Ozone
Concentration (PPB)*
Maximum 8 Hour Average Ozone
Concentration (PPB)*
Tomorrow
(Ending 05/20, 4Z)
43
40
*Due to grid interpolation methods, the maximum 1- and 8-hour ozone concentration values may have
values slightly higher or lower than those of the corresponding hourly ozone concentrations.

Ozone
Ending Time
1 Hour Average Ozone
Concentration (PPB)
12Z Model Run
8 Hour Average Ozone
Concentration (PPB)
12Z Model Run
Thu, 19 May  11 AM
41
30
Thu, 19 May  12 PM
43
32
Thu, 19 May  01 PM
43
34
Thu, 19 May  02 PM
42
36
Thu, 19 May  03 PM
40
38
Thu, 19 May  04 PM
39
40
Thu, 19 May   05 PM
38
40
Thu, 19 May   06 PM
36
40
Thu, 19 May   07 PM
34
40
Thu, 19 May   08 PM
33
38
Thu, 19 May   09 PM
33
37
Thu, 19 May   10 PM
31
36
Thu, 19 May   11 PM
31
34
Fri, 20 May   12 AM
31
33
Fri, 20 May   01 AM
29
32
Fri, 20 May   02 AM
29
31
Fri, 20 May   03 AM
29
31
Fri, 20 May   04 AM
27
30
Fri, 20 May   05 AM
25
29
Fri, 20 May   06 AM
25
28
Fri, 20 May   07 AM
23
27
Fri, 20 May   08 AM
25
26
Fri, 20 May   09 AM
31
27
Fri, 20 May   10 AM
35
27
Fri, 20 May   11 AM
38
29
Fri, 20 May   12 PM
40
30
Fri, 20 May   01 PM
43
32
Fri, 20 May   02 PM
46
35
Fri, 20 May   03 PM
48
38
Fri, 20 May   04 PM
50
41
Fri, 20 May   05 PM
51
44
Fri, 20 May   06 PM
50
46
Fri, 20 May   07 PM
47
47
Fri, 20 May   08 PM
44
47
Fri, 20 May   09 PM
41
47
Fri, 20 May   10 PM
35
46
Fri, 20 May   11 PM
35
44
Sat, 21 May   12 AM
34
42
Sat, 21 May   01 AM
34
40
Sat, 21 May   02 AM
34
38
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)
06Z Model Run
Thu, 19 May  11 AM
0
0
Thu, 19 May  12 PM
0
0
Thu, 19 May  01 PM
0
0
Thu, 19 May  02 PM
0
0
Thu, 19 May  03 PM
0
0
Thu, 19 May  04 PM
0
0
Thu, 19 May  05 PM
0
0
Thu, 19 May  06 PM
0
0
Thu, 19 May  07 PM
0
0
Thu, 19 May  08 PM
0
0
Thu, 19 May  09 PM
0
0
Thu, 19 May  10 PM
0
0
Thu, 19 May  11 PM
0
0
Fri, 20 May  12 AM
0
0
Fri, 20 May  01 AM
0
0
Fri, 20 May  02 AM
0
0
Fri, 20 May  03 AM
0
0
Fri, 20 May  04 AM
0
0
Fri, 20 May  05 AM
0
0
Fri, 20 May  06 AM
0
0
Fri, 20 May  07 AM
0
0
Fri, 20 May  08 AM
0
0
Fri, 20 May  09 AM
0
0
Fri, 20 May  10 AM
0
0
Fri, 20 May  11 AM
0
0
Fri, 20 May  12 PM
0
0
Fri, 20 May  01 PM
0
0
Fri, 20 May  02 PM
0
0
Fri, 20 May  03 PM
0
0
Fri, 20 May  04 PM
0
0
Fri, 20 May  05 PM
0
0
Fri, 20 May  06 PM
0
0
Fri, 20 May  07 PM
0
0
Fri, 20 May  08 PM
0
0
Fri, 20 May  09 PM
0
0
Fri, 20 May  10 PM
0
0
National Weather Service Air Quality Program Page
Environmental Protection Agency AirNow Forecast Page
Graphical Air Quality Forecast Guidance
FAQ

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