Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 38.67 N, longitude: 123.23 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 09/23, 4Z)
43
42
*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)

6Z Model Run
8 Hour Average Ozone
Concentration (PPB)

6Z Model Run
Wed, 22 Sep  07 AM
19
26
Wed, 22 Sep  08 AM
18
24
Wed, 22 Sep  09 AM
27
23
Wed, 22 Sep  10 AM
42
25
Wed, 22 Sep  11 AM
41
26
Wed, 22 Sep  12 PM
41
29
Wed, 22 Sep  01 PM
42
31
Wed, 22 Sep  02 PM
42
34
Wed, 22 Sep  03 PM
43
37
Wed, 22 Sep  04 PM
43
40
Wed, 22 Sep   05 PM
41
42
Wed, 22 Sep   06 PM
40
42
Wed, 22 Sep   07 PM
40
42
Wed, 22 Sep   08 PM
36
41
Wed, 22 Sep   09 PM
34
40
Wed, 22 Sep   10 PM
32
39
Wed, 22 Sep   11 PM
29
37
Thu, 23 Sep   12 AM
27
35
Thu, 23 Sep   01 AM
25
33
Thu, 23 Sep   02 AM
23
31
Thu, 23 Sep   03 AM
21
29
Thu, 23 Sep   04 AM
18
26
Thu, 23 Sep   05 AM
18
24
Thu, 23 Sep   06 AM
17
22
Thu, 23 Sep   07 AM
17
21
Thu, 23 Sep   08 AM
16
20
Thu, 23 Sep   09 AM
20
19
Thu, 23 Sep   10 AM
32
20
Thu, 23 Sep   11 AM
36
22
Thu, 23 Sep   12 PM
40
24
Thu, 23 Sep   01 PM
42
28
Thu, 23 Sep   02 PM
43
31
Thu, 23 Sep   03 PM
41
34
Thu, 23 Sep   04 PM
38
36
Thu, 23 Sep   05 PM
36
38
Thu, 23 Sep   06 PM
35
39
Thu, 23 Sep   07 PM
32
38
Thu, 23 Sep   08 PM
30
37
Thu, 23 Sep   09 PM
29
35
Thu, 23 Sep   10 PM
27
33
Thu, 23 Sep   11 PM
26
32
Fri, 24 Sep   12 AM
24
30
Fri, 24 Sep   01 AM
24
28
Fri, 24 Sep   02 AM
23
27
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Wed, 22 Sep  07 AM
1
1
Wed, 22 Sep  08 AM
1
0
Wed, 22 Sep  09 AM
1
0
Wed, 22 Sep  10 AM
0
0
Wed, 22 Sep  11 AM
0
0
Wed, 22 Sep  12 PM
1
0
Wed, 22 Sep  01 PM
1
1
Wed, 22 Sep  02 PM
0
0
Wed, 22 Sep  03 PM
2
0
Wed, 22 Sep  04 PM
1
0
Wed, 22 Sep  05 PM
1
0
Wed, 22 Sep  06 PM
2
0
Wed, 22 Sep  07 PM
0
0
Wed, 22 Sep  08 PM
0
0
Wed, 22 Sep  09 PM
0
0
Wed, 22 Sep  10 PM
0
0
Wed, 22 Sep  11 PM
0
0
Thu, 23 Sep  12 AM
0
0
Thu, 23 Sep  01 AM
0
0
Thu, 23 Sep  02 AM
0
0
Thu, 23 Sep  03 AM
0
0
Thu, 23 Sep  04 AM
1
0
Thu, 23 Sep  05 AM
4
1
Thu, 23 Sep  06 AM
3
1
Thu, 23 Sep  07 AM
1
1
Thu, 23 Sep  08 AM
1
1
Thu, 23 Sep  09 AM
1
0
Thu, 23 Sep  10 AM
13
0
Thu, 23 Sep  11 AM
9
0
Thu, 23 Sep  12 PM
1
0
Thu, 23 Sep  01 PM
1
0
Thu, 23 Sep  02 PM
1
0
Thu, 23 Sep  03 PM
0
0
Thu, 23 Sep  04 PM
3
1
Thu, 23 Sep  05 PM
6
1
Thu, 23 Sep  06 PM
13
2
Thu, 23 Sep  07 PM
7
1
Thu, 23 Sep  08 PM
6
1
Thu, 23 Sep  09 PM
7
2
Thu, 23 Sep  10 PM
6
1

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


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