Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 47.48 N, longitude: 121.50 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 08/08, 4Z)
41
36
*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
Fri, 07 Aug  09 AM
16
17
Fri, 07 Aug  10 AM
22
18
Fri, 07 Aug  11 AM
27
19
Fri, 07 Aug  12 PM
29
20
Fri, 07 Aug  01 PM
30
21
Fri, 07 Aug  02 PM
32
23
Fri, 07 Aug  03 PM
35
26
Fri, 07 Aug  04 PM
37
28
Fri, 07 Aug   05 PM
39
31
Fri, 07 Aug   06 PM
41
34
Fri, 07 Aug   07 PM
39
35
Fri, 07 Aug   08 PM
36
36
Fri, 07 Aug   09 PM
32
36
Fri, 07 Aug   10 PM
27
36
Fri, 07 Aug   11 PM
28
35
Sat, 08 Aug   12 AM
25
34
Sat, 08 Aug   01 AM
22
31
Sat, 08 Aug   02 AM
19
28
Sat, 08 Aug   03 AM
16
26
Sat, 08 Aug   04 AM
18
23
Sat, 08 Aug   05 AM
14
21
Sat, 08 Aug   06 AM
14
19
Sat, 08 Aug   07 AM
15
18
Sat, 08 Aug   08 AM
18
17
Sat, 08 Aug   09 AM
20
17
Sat, 08 Aug   10 AM
23
17
Sat, 08 Aug   11 AM
26
18
Sat, 08 Aug   12 PM
27
20
Sat, 08 Aug   01 PM
30
22
Sat, 08 Aug   02 PM
33
24
Sat, 08 Aug   03 PM
37
27
Sat, 08 Aug   04 PM
37
29
Sat, 08 Aug   05 PM
36
31
Sat, 08 Aug   06 PM
36
33
Sat, 08 Aug   07 PM
31
33
Sat, 08 Aug   08 PM
34
34
Sat, 08 Aug   09 PM
31
34
Sat, 08 Aug   10 PM
30
34
Sat, 08 Aug   11 PM
26
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
Fri, 07 Aug  09 AM
0
0
Fri, 07 Aug  10 AM
0
0
Fri, 07 Aug  11 AM
0
0
Fri, 07 Aug  12 PM
0
0
Fri, 07 Aug  01 PM
0
0
Fri, 07 Aug  02 PM
0
0
Fri, 07 Aug  03 PM
0
0
Fri, 07 Aug  04 PM
0
0
Fri, 07 Aug  05 PM
0
0
Fri, 07 Aug  06 PM
0
0
Fri, 07 Aug  07 PM
0
0
Fri, 07 Aug  08 PM
0
0
Fri, 07 Aug  09 PM
0
0
Fri, 07 Aug  10 PM
0
0
Fri, 07 Aug  11 PM
0
0
Sat, 08 Aug  12 AM
0
0
Sat, 08 Aug  01 AM
0
0
Sat, 08 Aug  02 AM
0
0
Sat, 08 Aug  03 AM
0
0
Sat, 08 Aug  04 AM
0
0
Sat, 08 Aug  05 AM
0
0
Sat, 08 Aug  06 AM
0
0
Sat, 08 Aug  07 AM
0
0
Sat, 08 Aug  08 AM
0
0
Sat, 08 Aug  09 AM
0
0
Sat, 08 Aug  10 AM
0
0
Sat, 08 Aug  11 AM
0
0
Sat, 08 Aug  12 PM
0
0
Sat, 08 Aug  01 PM
0
0
Sat, 08 Aug  02 PM
0
0
Sat, 08 Aug  03 PM
0
0
Sat, 08 Aug  04 PM
0
0
Sat, 08 Aug  05 PM
0
0
Sat, 08 Aug  06 PM
0
0
Sat, 08 Aug  07 PM
0
0
Sat, 08 Aug  08 PM
0
0
Sat, 08 Aug  09 PM
0
0
Sat, 08 Aug  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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