Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 43.99 N, longitude: 121.68 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 10/02, 4Z)
41
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
Sun, 01 Oct  12 PM
33
37
Sun, 01 Oct  01 PM
34
36
Sun, 01 Oct  02 PM
35
36
Sun, 01 Oct  03 PM
36
35
Sun, 01 Oct  04 PM
37
35
Sun, 01 Oct   05 PM
38
35
Sun, 01 Oct   06 PM
39
35
Sun, 01 Oct   07 PM
38
36
Sun, 01 Oct   08 PM
35
37
Sun, 01 Oct   09 PM
36
37
Sun, 01 Oct   10 PM
37
37
Sun, 01 Oct   11 PM
39
37
Mon, 02 Oct   12 AM
39
38
Mon, 02 Oct   01 AM
38
38
Mon, 02 Oct   02 AM
39
38
Mon, 02 Oct   03 AM
40
38
Mon, 02 Oct   04 AM
41
39
Mon, 02 Oct   05 AM
42
39
Mon, 02 Oct   06 AM
42
40
Mon, 02 Oct   07 AM
43
40
Mon, 02 Oct   08 AM
42
41
Mon, 02 Oct   09 AM
37
41
Mon, 02 Oct   10 AM
35
40
Mon, 02 Oct   11 AM
35
40
Mon, 02 Oct   12 PM
34
39
Mon, 02 Oct   01 PM
34
38
Mon, 02 Oct   02 PM
33
37
Mon, 02 Oct   03 PM
33
35
Mon, 02 Oct   04 PM
33
34
Mon, 02 Oct   05 PM
34
34
Mon, 02 Oct   06 PM
36
34
Mon, 02 Oct   07 PM
38
34
Mon, 02 Oct   08 PM
37
35
Mon, 02 Oct   09 PM
37
35
Mon, 02 Oct   10 PM
36
36
Mon, 02 Oct   11 PM
37
36
Tue, 03 Oct   12 AM
37
37
Tue, 03 Oct   01 AM
36
37
Tue, 03 Oct   02 AM
35
37
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)
06Z Model Run
Sun, 01 Oct  12 PM
0
0
Sun, 01 Oct  01 PM
0
0
Sun, 01 Oct  02 PM
0
0
Sun, 01 Oct  03 PM
0
0
Sun, 01 Oct  04 PM
0
0
Sun, 01 Oct  05 PM
0
0
Sun, 01 Oct  06 PM
0
0
Sun, 01 Oct  07 PM
0
0
Sun, 01 Oct  08 PM
0
0
Sun, 01 Oct  09 PM
0
0
Sun, 01 Oct  10 PM
0
0
Sun, 01 Oct  11 PM
0
0
Mon, 02 Oct  12 AM
0
0
Mon, 02 Oct  01 AM
0
0
Mon, 02 Oct  02 AM
0
0
Mon, 02 Oct  03 AM
0
0
Mon, 02 Oct  04 AM
0
0
Mon, 02 Oct  05 AM
0
0
Mon, 02 Oct  06 AM
0
0
Mon, 02 Oct  07 AM
0
0
Mon, 02 Oct  08 AM
0
0
Mon, 02 Oct  09 AM
0
0
Mon, 02 Oct  10 AM
0
0
Mon, 02 Oct  11 AM
0
0
Mon, 02 Oct  12 PM
0
0
Mon, 02 Oct  01 PM
0
0
Mon, 02 Oct  02 PM
0
0
Mon, 02 Oct  03 PM
0
0
Mon, 02 Oct  04 PM
0
0
Mon, 02 Oct  05 PM
0
0
Mon, 02 Oct  06 PM
0
0
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