Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 47.38 N, longitude: 123.36 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 06/19, 4Z)
26
22
*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, 18 Jun  01 PM
25
19
Fri, 18 Jun  02 PM
23
21
Fri, 18 Jun  03 PM
21
22
Fri, 18 Jun  04 PM
20
23
Fri, 18 Jun   05 PM
20
23
Fri, 18 Jun   06 PM
20
22
Fri, 18 Jun   07 PM
20
22
Fri, 18 Jun   08 PM
22
21
Fri, 18 Jun   09 PM
22
21
Fri, 18 Jun   10 PM
20
21
Fri, 18 Jun   11 PM
17
20
Sat, 19 Jun   12 AM
15
20
Sat, 19 Jun   01 AM
13
19
Sat, 19 Jun   02 AM
12
18
Sat, 19 Jun   03 AM
10
16
Sat, 19 Jun   04 AM
9
15
Sat, 19 Jun   05 AM
7
13
Sat, 19 Jun   06 AM
5
11
Sat, 19 Jun   07 AM
5
10
Sat, 19 Jun   08 AM
7
8
Sat, 19 Jun   09 AM
11
8
Sat, 19 Jun   10 AM
14
9
Sat, 19 Jun   11 AM
17
9
Sat, 19 Jun   12 PM
19
11
Sat, 19 Jun   01 PM
18
12
Sat, 19 Jun   02 PM
19
14
Sat, 19 Jun   03 PM
18
15
Sat, 19 Jun   04 PM
18
17
Sat, 19 Jun   05 PM
18
18
Sat, 19 Jun   06 PM
18
18
Sat, 19 Jun   07 PM
18
18
Sat, 19 Jun   08 PM
19
18
Sat, 19 Jun   09 PM
22
19
Sat, 19 Jun   10 PM
26
20
Sat, 19 Jun   11 PM
28
21
Sun, 20 Jun   12 AM
28
22
Sun, 20 Jun   01 AM
24
23
Sun, 20 Jun   02 AM
21
23
Sun, 20 Jun   03 AM
18
23
Sun, 20 Jun   04 AM
15
23
Sun, 20 Jun   05 AM
13
22
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, 18 Jun  01 PM
0
0
Fri, 18 Jun  02 PM
0
0
Fri, 18 Jun  03 PM
0
0
Fri, 18 Jun  04 PM
0
0
Fri, 18 Jun  05 PM
0
0
Fri, 18 Jun  06 PM
0
0
Fri, 18 Jun  07 PM
0
0
Fri, 18 Jun  08 PM
0
0
Fri, 18 Jun  09 PM
0
0
Fri, 18 Jun  10 PM
0
0
Fri, 18 Jun  11 PM
0
0
Sat, 19 Jun  12 AM
0
0
Sat, 19 Jun  01 AM
0
0
Sat, 19 Jun  02 AM
0
0
Sat, 19 Jun  03 AM
0
0
Sat, 19 Jun  04 AM
0
0
Sat, 19 Jun  05 AM
0
0
Sat, 19 Jun  06 AM
0
0
Sat, 19 Jun  07 AM
0
0
Sat, 19 Jun  08 AM
0
0
Sat, 19 Jun  09 AM
0
0
Sat, 19 Jun  10 AM
0
0
Sat, 19 Jun  11 AM
0
0
Sat, 19 Jun  12 PM
0
0
Sat, 19 Jun  01 PM
0
0
Sat, 19 Jun  02 PM
0
0
Sat, 19 Jun  03 PM
0
0
Sat, 19 Jun  04 PM
0
0
Sat, 19 Jun  05 PM
0
0
Sat, 19 Jun  06 PM
0
0
Sat, 19 Jun  07 PM
0
0
Sat, 19 Jun  08 PM
0
0
Sat, 19 Jun  09 PM
0
0
Sat, 19 Jun  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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