Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 46.79 N, longitude: 121.73 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 08/17, 4Z)
48
46
*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)
6Z Model Run
8 Hour Average Ozone
Concentration (PPB)
6Z Model Run
Tue, 16 Aug  07 AM
35
42
Tue, 16 Aug  08 AM
34
40
Tue, 16 Aug  09 AM
37
39
Tue, 16 Aug  10 AM
39
38
Tue, 16 Aug  11 AM
40
37
Tue, 16 Aug  12 PM
37
37
Tue, 16 Aug  01 PM
36
37
Tue, 16 Aug  02 PM
34
36
Tue, 16 Aug  03 PM
33
36
Tue, 16 Aug  04 PM
35
36
Tue, 16 Aug   05 PM
36
36
Tue, 16 Aug   06 PM
40
36
Tue, 16 Aug   07 PM
46
37
Tue, 16 Aug   08 PM
48
39
Tue, 16 Aug   09 PM
42
39
Tue, 16 Aug   10 PM
44
41
Tue, 16 Aug   11 PM
45
42
Wed, 17 Aug   12 AM
48
44
Wed, 17 Aug   01 AM
48
45
Wed, 17 Aug   02 AM
49
46
Wed, 17 Aug   03 AM
47
46
Wed, 17 Aug   04 AM
46
46
Wed, 17 Aug   05 AM
43
46
Wed, 17 Aug   06 AM
43
46
Wed, 17 Aug   07 AM
41
46
Wed, 17 Aug   08 AM
37
44
Wed, 17 Aug   09 AM
42
43
Wed, 17 Aug   10 AM
46
43
Wed, 17 Aug   11 AM
46
43
Wed, 17 Aug   12 PM
42
42
Wed, 17 Aug   01 PM
42
42
Wed, 17 Aug   02 PM
40
42
Wed, 17 Aug   03 PM
39
42
Wed, 17 Aug   04 PM
40
42
Wed, 17 Aug   05 PM
39
42
Wed, 17 Aug   06 PM
38
41
Wed, 17 Aug   07 PM
38
40
Wed, 17 Aug   08 PM
33
39
Wed, 17 Aug   09 PM
27
37
Wed, 17 Aug   10 PM
29
35
Wed, 17 Aug   11 PM
29
34
Thu, 18 Aug   12 AM
33
33
Thu, 18 Aug   01 AM
35
33
Thu, 18 Aug   02 AM
42
33
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)
06Z Model Run
Tue, 16 Aug  06 AM
0
0
Tue, 16 Aug  07 AM
0
0
Tue, 16 Aug  08 AM
0
0
Tue, 16 Aug  09 AM
0
0
Tue, 16 Aug  10 AM
0
0
Tue, 16 Aug  11 AM
0
0
Tue, 16 Aug  12 PM
0
0
Tue, 16 Aug  01 PM
0
0
Tue, 16 Aug  02 PM
0
0
Tue, 16 Aug  03 PM
0
0
Tue, 16 Aug  04 PM
0
0
Tue, 16 Aug  05 PM
0
0
Tue, 16 Aug  06 PM
0
0
Tue, 16 Aug  07 PM
0
0
Tue, 16 Aug  08 PM
0
0
Tue, 16 Aug  09 PM
0
0
Tue, 16 Aug  10 PM
0
0
Tue, 16 Aug  11 PM
0
0
Wed, 17 Aug  12 AM
0
0
Wed, 17 Aug  01 AM
0
0
Wed, 17 Aug  02 AM
0
0
Wed, 17 Aug  03 AM
0
0
Wed, 17 Aug  04 AM
0
0
Wed, 17 Aug  05 AM
0
0
Wed, 17 Aug  06 AM
0
0
Wed, 17 Aug  07 AM
0
0
Wed, 17 Aug  08 AM
0
0
Wed, 17 Aug  09 AM
0
0
Wed, 17 Aug  10 AM
0
0
Wed, 17 Aug  11 AM
0
0
Wed, 17 Aug  12 PM
0
0
Wed, 17 Aug  01 PM
0
0
Wed, 17 Aug  02 PM
0
0
Wed, 17 Aug  03 PM
0
0
Wed, 17 Aug  04 PM
0
0
Wed, 17 Aug  05 PM
0
0
Wed, 17 Aug  06 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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