Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 46.09 N, longitude: 121.48 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)
52
48
*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
45
47
Sat, 31 Jul  10 PM
42
46
Sat, 31 Jul  11 PM
43
45
Sun, 01 Aug  12 AM
42
44
Sun, 01 Aug  01 AM
43
44
Sun, 01 Aug  02 AM
46
44
Sun, 01 Aug  03 AM
50
44
Sun, 01 Aug  04 AM
50
45
Sun, 01 Aug  05 AM
48
45
Sun, 01 Aug  06 AM
46
46
Sun, 01 Aug  07 AM
44
46
Sun, 01 Aug  08 AM
40
46
Sun, 01 Aug  09 AM
43
46
Sun, 01 Aug  10 AM
47
46
Sun, 01 Aug  11 AM
46
46
Sun, 01 Aug  12 PM
46
45
Sun, 01 Aug  01 PM
45
45
Sun, 01 Aug  02 PM
44
44
Sun, 01 Aug  03 PM
44
44
Sun, 01 Aug  04 PM
44
45
Sun, 01 Aug   05 PM
45
45
Sun, 01 Aug   06 PM
48
45
Sun, 01 Aug   07 PM
49
46
Sun, 01 Aug   08 PM
48
46
Sun, 01 Aug   09 PM
44
46
Sun, 01 Aug   10 PM
41
45
Sun, 01 Aug   11 PM
40
45
Mon, 02 Aug   12 AM
39
44
Mon, 02 Aug   01 AM
38
43
Mon, 02 Aug   02 AM
39
42
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
32
Sat, 31 Jul  10 PM
0
52
Sat, 31 Jul  11 PM
0
42
Sun, 01 Aug  12 AM
2
70
Sun, 01 Aug  01 AM
0
49
Sun, 01 Aug  02 AM
0
34
Sun, 01 Aug  03 AM
0
67
Sun, 01 Aug  04 AM
0
41
Sun, 01 Aug  05 AM
0
36
Sun, 01 Aug  06 AM
0
33
Sun, 01 Aug  07 AM
0
72
Sun, 01 Aug  08 AM
429
56
Sun, 01 Aug  09 AM
152
74
Sun, 01 Aug  10 AM
273
76
Sun, 01 Aug  11 AM
0
104
Sun, 01 Aug  12 PM
1014
179
Sun, 01 Aug  01 PM
425
242
Sun, 01 Aug  02 PM
0
331
Sun, 01 Aug  03 PM
0
451
Sun, 01 Aug  04 PM
908
407
Sun, 01 Aug  05 PM
385
429
Sun, 01 Aug  06 PM
1368
429
Sun, 01 Aug  07 PM
1730
472
Sun, 01 Aug  08 PM
2432
592
Sun, 01 Aug  09 PM
1722
431
Sun, 01 Aug  10 PM
2128
261

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


    US Dept of Commerce
    National Oceanic and Atmospheric Administration
    National Weather Service
    1325 East West Highway
    Silver Spring, MD 20910
    Page Author: NWS Internet Services Team
Disclaimer
Information Quality
Credits
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities