Air Quality Forecast Guidance for Portola, CA

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 39.81 N, longitude: 120.47 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 06/27, 4Z)
54
53
*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
Sun, 26 Jun  03 PM
54
48
Sun, 26 Jun  04 PM
54
51
Sun, 26 Jun   05 PM
54
52
Sun, 26 Jun   06 PM
53
53
Sun, 26 Jun   07 PM
52
53
Sun, 26 Jun   08 PM
50
53
Sun, 26 Jun   09 PM
45
52
Sun, 26 Jun   10 PM
40
50
Sun, 26 Jun   11 PM
36
48
Mon, 27 Jun   12 AM
33
45
Mon, 27 Jun   01 AM
33
43
Mon, 27 Jun   02 AM
31
40
Mon, 27 Jun   03 AM
32
38
Mon, 27 Jun   04 AM
33
35
Mon, 27 Jun   05 AM
33
34
Mon, 27 Jun   06 AM
32
33
Mon, 27 Jun   07 AM
33
33
Mon, 27 Jun   08 AM
36
33
Mon, 27 Jun   09 AM
43
34
Mon, 27 Jun   10 AM
46
36
Mon, 27 Jun   11 AM
51
38
Mon, 27 Jun   12 PM
52
41
Mon, 27 Jun   01 PM
53
43
Mon, 27 Jun   02 PM
54
46
Mon, 27 Jun   03 PM
55
49
Mon, 27 Jun   04 PM
56
51
Mon, 27 Jun   05 PM
57
53
Mon, 27 Jun   06 PM
57
54
Mon, 27 Jun   07 PM
56
55
Mon, 27 Jun   08 PM
55
55
Mon, 27 Jun   09 PM
52
55
Mon, 27 Jun   10 PM
46
54
Mon, 27 Jun   11 PM
40
52
Tue, 28 Jun   12 AM
36
50
Tue, 28 Jun   01 AM
36
47
Tue, 28 Jun   02 AM
32
44
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Sun, 26 Jun  03 PM
0
0
Sun, 26 Jun  04 PM
0
0
Sun, 26 Jun  05 PM
0
0
Sun, 26 Jun  06 PM
0
0
Sun, 26 Jun  07 PM
0
0
Sun, 26 Jun  08 PM
0
0
Sun, 26 Jun  09 PM
0
0
Sun, 26 Jun  10 PM
0
0
Sun, 26 Jun  11 PM
0
0
Mon, 27 Jun  12 AM
0
0
Mon, 27 Jun  01 AM
0
0
Mon, 27 Jun  02 AM
0
0
Mon, 27 Jun  03 AM
0
0
Mon, 27 Jun  04 AM
0
0
Mon, 27 Jun  05 AM
0
0
Mon, 27 Jun  06 AM
0
0
Mon, 27 Jun  07 AM
0
0
Mon, 27 Jun  08 AM
0
0
Mon, 27 Jun  09 AM
0
0
Mon, 27 Jun  10 AM
0
0
Mon, 27 Jun  11 AM
0
0
Mon, 27 Jun  12 PM
0
0
Mon, 27 Jun  01 PM
0
0
Mon, 27 Jun  02 PM
0
0
Mon, 27 Jun  03 PM
0
0
Mon, 27 Jun  04 PM
0
0
Mon, 27 Jun  05 PM
0
0
Mon, 27 Jun  06 PM
0
0
Mon, 27 Jun  07 PM
0
0
Mon, 27 Jun  08 PM
0
0
Mon, 27 Jun  09 PM
0
0
Mon, 27 Jun  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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