Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 47.26 N, longitude: 122.87 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 07/05, 4Z)
22
21
*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
Mon, 04 Jul  01 PM
20
16
Mon, 04 Jul  02 PM
21
17
Mon, 04 Jul  03 PM
21
18
Mon, 04 Jul  04 PM
20
19
Mon, 04 Jul   05 PM
21
19
Mon, 04 Jul   06 PM
21
20
Mon, 04 Jul   07 PM
22
21
Mon, 04 Jul   08 PM
22
21
Mon, 04 Jul   09 PM
22
21
Mon, 04 Jul   10 PM
20
21
Mon, 04 Jul   11 PM
18
21
Tue, 05 Jul   12 AM
17
20
Tue, 05 Jul   01 AM
15
20
Tue, 05 Jul   02 AM
11
18
Tue, 05 Jul   03 AM
10
17
Tue, 05 Jul   04 AM
8
15
Tue, 05 Jul   05 AM
8
13
Tue, 05 Jul   06 AM
8
12
Tue, 05 Jul   07 AM
9
11
Tue, 05 Jul   08 AM
14
10
Tue, 05 Jul   09 AM
17
11
Tue, 05 Jul   10 AM
20
12
Tue, 05 Jul   11 AM
26
14
Tue, 05 Jul   12 PM
29
16
Tue, 05 Jul   01 PM
32
19
Tue, 05 Jul   02 PM
35
23
Tue, 05 Jul   03 PM
36
26
Tue, 05 Jul   04 PM
37
29
Tue, 05 Jul   05 PM
39
32
Tue, 05 Jul   06 PM
39
34
Tue, 05 Jul   07 PM
31
35
Tue, 05 Jul   08 PM
23
34
Tue, 05 Jul   09 PM
24
33
Tue, 05 Jul   10 PM
22
31
Tue, 05 Jul   11 PM
19
29
Wed, 06 Jul   12 AM
17
27
Wed, 06 Jul   01 AM
14
24
Wed, 06 Jul   02 AM
12
20
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Mon, 04 Jul  01 PM
0
0
Mon, 04 Jul  02 PM
0
0
Mon, 04 Jul  03 PM
0
0
Mon, 04 Jul  04 PM
0
0
Mon, 04 Jul  05 PM
0
0
Mon, 04 Jul  06 PM
0
0
Mon, 04 Jul  07 PM
0
0
Mon, 04 Jul  08 PM
0
0
Mon, 04 Jul  09 PM
0
0
Mon, 04 Jul  10 PM
0
0
Mon, 04 Jul  11 PM
0
0
Tue, 05 Jul  12 AM
0
0
Tue, 05 Jul  01 AM
0
0
Tue, 05 Jul  02 AM
0
0
Tue, 05 Jul  03 AM
0
0
Tue, 05 Jul  04 AM
0
0
Tue, 05 Jul  05 AM
0
0
Tue, 05 Jul  06 AM
0
0
Tue, 05 Jul  07 AM
0
0
Tue, 05 Jul  08 AM
0
0
Tue, 05 Jul  09 AM
0
0
Tue, 05 Jul  10 AM
0
0
Tue, 05 Jul  11 AM
0
0
Tue, 05 Jul  12 PM
0
0
Tue, 05 Jul  01 PM
0
0
Tue, 05 Jul  02 PM
0
0
Tue, 05 Jul  03 PM
0
0
Tue, 05 Jul  04 PM
0
0
Tue, 05 Jul  05 PM
0
0
Tue, 05 Jul  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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