Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 47.80 N, longitude: 121.05 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 08/01, 4Z)
45
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
Sat, 31 Jul  09 PM
41
40
Sat, 31 Jul  10 PM
36
40
Sat, 31 Jul  11 PM
32
40
Sun, 01 Aug  12 AM
29
39
Sun, 01 Aug  01 AM
30
38
Sun, 01 Aug  02 AM
27
35
Sun, 01 Aug  03 AM
25
33
Sun, 01 Aug  04 AM
23
30
Sun, 01 Aug  05 AM
18
27
Sun, 01 Aug  06 AM
17
25
Sun, 01 Aug  07 AM
17
23
Sun, 01 Aug  08 AM
15
22
Sun, 01 Aug  09 AM
16
20
Sun, 01 Aug  10 AM
15
18
Sun, 01 Aug  11 AM
16
17
Sun, 01 Aug  12 PM
25
17
Sun, 01 Aug  01 PM
34
19
Sun, 01 Aug  02 PM
39
22
Sun, 01 Aug  03 PM
40
25
Sun, 01 Aug  04 PM
40
28
Sun, 01 Aug   05 PM
40
31
Sun, 01 Aug   06 PM
42
35
Sun, 01 Aug   07 PM
42
38
Sun, 01 Aug   08 PM
40
40
Sun, 01 Aug   09 PM
36
40
Sun, 01 Aug   10 PM
32
39
Sun, 01 Aug   11 PM
30
38
Mon, 02 Aug   12 AM
29
36
Mon, 02 Aug   01 AM
30
35
Mon, 02 Aug   02 AM
31
34
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Sat, 31 Jul  09 PM
0
141
Sat, 31 Jul  10 PM
0
114
Sat, 31 Jul  11 PM
0
139
Sun, 01 Aug  12 AM
0
135
Sun, 01 Aug  01 AM
5
115
Sun, 01 Aug  02 AM
64
87
Sun, 01 Aug  03 AM
287
109
Sun, 01 Aug  04 AM
895
168
Sun, 01 Aug  05 AM
875
229
Sun, 01 Aug  06 AM
140
147
Sun, 01 Aug  07 AM
0
82
Sun, 01 Aug  08 AM
0
61
Sun, 01 Aug  09 AM
0
62
Sun, 01 Aug  10 AM
0
45
Sun, 01 Aug  11 AM
0
23
Sun, 01 Aug  12 PM
0
20
Sun, 01 Aug  01 PM
0
15
Sun, 01 Aug  02 PM
0
14
Sun, 01 Aug  03 PM
0
13
Sun, 01 Aug  04 PM
0
20
Sun, 01 Aug  05 PM
0
15
Sun, 01 Aug  06 PM
0
23
Sun, 01 Aug  07 PM
106
40
Sun, 01 Aug  08 PM
0
90
Sun, 01 Aug  09 PM
0
215
Sun, 01 Aug  10 PM
0
356

National Weather Service Air Quality Program Page
Environmental Protection Agency AirNow Forecast Page
Graphical Air Quality Forecast Guidance
FAQ


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