Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 48.76 N, longitude: 121.67 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 09/30, 4Z)
36
34
*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
Fri, 29 Sep  11 PM
28
32
Sat, 30 Sep  12 AM
28
32
Sat, 30 Sep  01 AM
26
31
Sat, 30 Sep  02 AM
26
30
Sat, 30 Sep  03 AM
27
28
Sat, 30 Sep  04 AM
28
28
Sat, 30 Sep  05 AM
28
27
Sat, 30 Sep  06 AM
29
28
Sat, 30 Sep  07 AM
30
28
Sat, 30 Sep  08 AM
30
28
Sat, 30 Sep  09 AM
28
28
Sat, 30 Sep  10 AM
27
28
Sat, 30 Sep  11 AM
27
28
Sat, 30 Sep  12 PM
28
28
Sat, 30 Sep  01 PM
28
28
Sat, 30 Sep  02 PM
30
29
Sat, 30 Sep  03 PM
30
28
Sat, 30 Sep  04 PM
31
29
Sat, 30 Sep   05 PM
31
29
Sat, 30 Sep   06 PM
33
30
Sat, 30 Sep   07 PM
33
30
Sat, 30 Sep   08 PM
31
31
Sat, 30 Sep   09 PM
29
31
Sat, 30 Sep   10 PM
28
31
Sat, 30 Sep   11 PM
27
30
Sun, 01 Oct   12 AM
27
30
Sun, 01 Oct   01 AM
26
29
Sun, 01 Oct   02 AM
25
28
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)
06Z Model Run
Fri, 29 Sep  11 PM
0
0
Sat, 30 Sep  12 AM
0
0
Sat, 30 Sep  01 AM
0
0
Sat, 30 Sep  02 AM
0
0
Sat, 30 Sep  03 AM
0
0
Sat, 30 Sep  04 AM
0
0
Sat, 30 Sep  05 AM
0
0
Sat, 30 Sep  06 AM
0
0
Sat, 30 Sep  07 AM
0
0
Sat, 30 Sep  08 AM
0
0
Sat, 30 Sep  09 AM
0
0
Sat, 30 Sep  10 AM
0
0
Sat, 30 Sep  11 AM
0
0
Sat, 30 Sep  12 PM
0
0
Sat, 30 Sep  01 PM
0
0
Sat, 30 Sep  02 PM
0
0
Sat, 30 Sep  03 PM
0
0
Sat, 30 Sep  04 PM
0
0
Sat, 30 Sep  05 PM
0
0
Sat, 30 Sep  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