Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 47.43 N, longitude: 121.42 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)
50
45
*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
34
42
Sat, 31 Jul  10 PM
28
39
Sat, 31 Jul  11 PM
25
36
Sun, 01 Aug  12 AM
26
34
Sun, 01 Aug  01 AM
29
32
Sun, 01 Aug  02 AM
26
30
Sun, 01 Aug  03 AM
21
28
Sun, 01 Aug  04 AM
20
26
Sun, 01 Aug  05 AM
21
25
Sun, 01 Aug  06 AM
22
24
Sun, 01 Aug  07 AM
21
23
Sun, 01 Aug  08 AM
18
22
Sun, 01 Aug  09 AM
14
20
Sun, 01 Aug  10 AM
13
19
Sun, 01 Aug  11 AM
17
18
Sun, 01 Aug  12 PM
21
18
Sun, 01 Aug  01 PM
28
19
Sun, 01 Aug  02 PM
35
21
Sun, 01 Aug  03 PM
39
23
Sun, 01 Aug  04 PM
40
26
Sun, 01 Aug   05 PM
39
29
Sun, 01 Aug   06 PM
40
32
Sun, 01 Aug   07 PM
43
35
Sun, 01 Aug   08 PM
46
39
Sun, 01 Aug   09 PM
47
41
Sun, 01 Aug   10 PM
44
42
Sun, 01 Aug   11 PM
42
43
Mon, 02 Aug   12 AM
42
43
Mon, 02 Aug   01 AM
43
43
Mon, 02 Aug   02 AM
44
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
Sat, 31 Jul  09 PM
0
145
Sat, 31 Jul  10 PM
0
171
Sat, 31 Jul  11 PM
0
110
Sun, 01 Aug  12 AM
0
130
Sun, 01 Aug  01 AM
0
170
Sun, 01 Aug  02 AM
0
125
Sun, 01 Aug  03 AM
12
128
Sun, 01 Aug  04 AM
78
126
Sun, 01 Aug  05 AM
368
245
Sun, 01 Aug  06 AM
0
200
Sun, 01 Aug  07 AM
0
339
Sun, 01 Aug  08 AM
0
227
Sun, 01 Aug  09 AM
0
114
Sun, 01 Aug  10 AM
0
108
Sun, 01 Aug  11 AM
0
77
Sun, 01 Aug  12 PM
0
51
Sun, 01 Aug  01 PM
0
22
Sun, 01 Aug  02 PM
0
20
Sun, 01 Aug  03 PM
0
48
Sun, 01 Aug  04 PM
363
67
Sun, 01 Aug  05 PM
131
66
Sun, 01 Aug  06 PM
49
64
Sun, 01 Aug  07 PM
5
166
Sun, 01 Aug  08 PM
0
348
Sun, 01 Aug  09 PM
0
436
Sun, 01 Aug  10 PM
0
268

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


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