Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 47.86 N, longitude: 123.97 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 10/25, 4Z)
32
31
*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, 24 Oct  01 PM
30
29
Sat, 24 Oct  02 PM
31
29
Sat, 24 Oct  03 PM
32
29
Sat, 24 Oct  04 PM
32
30
Sat, 24 Oct   05 PM
32
30
Sat, 24 Oct   06 PM
30
31
Sat, 24 Oct   07 PM
29
31
Sat, 24 Oct   08 PM
28
30
Sat, 24 Oct   09 PM
27
30
Sat, 24 Oct   10 PM
27
30
Sat, 24 Oct   11 PM
27
29
Sun, 25 Oct   12 AM
27
28
Sun, 25 Oct   01 AM
26
28
Sun, 25 Oct   02 AM
25
27
Sun, 25 Oct   03 AM
25
26
Sun, 25 Oct   04 AM
24
26
Sun, 25 Oct   05 AM
24
25
Sun, 25 Oct   06 AM
23
25
Sun, 25 Oct   07 AM
21
24
Sun, 25 Oct   08 AM
19
23
Sun, 25 Oct   09 AM
18
22
Sun, 25 Oct   10 AM
19
22
Sun, 25 Oct   11 AM
23
21
Sun, 25 Oct   12 PM
26
22
Sun, 25 Oct   01 PM
28
22
Sun, 25 Oct   02 PM
30
23
Sun, 25 Oct   03 PM
31
24
Sun, 25 Oct   04 PM
31
26
Sun, 25 Oct   05 PM
30
27
Sun, 25 Oct   06 PM
29
28
Sun, 25 Oct   07 PM
24
29
Sun, 25 Oct   08 PM
19
28
Sun, 25 Oct   09 PM
16
26
Sun, 25 Oct   10 PM
16
24
Sun, 25 Oct   11 PM
16
23
Mon, 26 Oct   12 AM
15
21
Mon, 26 Oct   01 AM
16
19
Mon, 26 Oct   02 AM
16
17
Mon, 26 Oct   03 AM
16
16
Mon, 26 Oct   04 AM
17
16
Mon, 26 Oct   05 AM
20
16
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, 24 Oct  11 AM
8
3
Sat, 24 Oct  12 PM
14
3
Sat, 24 Oct  01 PM
4
2
Sat, 24 Oct  02 PM
1
2
Sat, 24 Oct  03 PM
8
1
Sat, 24 Oct  04 PM
0
2
Sat, 24 Oct  05 PM
0
2
Sat, 24 Oct  06 PM
0
1
Sat, 24 Oct  07 PM
0
1
Sat, 24 Oct  08 PM
0
0
Sat, 24 Oct  09 PM
0
1
Sat, 24 Oct  10 PM
0
2
Sat, 24 Oct  11 PM
0
2
Sun, 25 Oct  12 AM
0
1
Sun, 25 Oct  01 AM
3
1
Sun, 25 Oct  02 AM
2
2
Sun, 25 Oct  03 AM
8
1
Sun, 25 Oct  04 AM
17
2
Sun, 25 Oct  05 AM
38
3
Sun, 25 Oct  06 AM
25
1
Sun, 25 Oct  07 AM
33
3
Sun, 25 Oct  08 AM
25
2
Sun, 25 Oct  09 AM
18
2
Sun, 25 Oct  10 AM
19
2
Sun, 25 Oct  11 AM
8
2
Sun, 25 Oct  12 PM
2
1
Sun, 25 Oct  01 PM
2
1
Sun, 25 Oct  02 PM
0
1
Sun, 25 Oct  03 PM
10
1
Sun, 25 Oct  04 PM
10
1
Sun, 25 Oct  05 PM
5
1
Sun, 25 Oct  06 PM
7
1
Sun, 25 Oct  07 PM
10
1
Sun, 25 Oct  08 PM
16
1
Sun, 25 Oct  09 PM
12
0
Sun, 25 Oct  10 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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