Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 36.99 N, longitude: 117.20 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 09/27, 4Z)
52
50
*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, 26 Sep  03 PM
48
41
Sat, 26 Sep  04 PM
50
45
Sat, 26 Sep   05 PM
51
48
Sat, 26 Sep   06 PM
51
50
Sat, 26 Sep   07 PM
50
50
Sat, 26 Sep   08 PM
47
50
Sat, 26 Sep   09 PM
41
48
Sat, 26 Sep   10 PM
34
47
Sat, 26 Sep   11 PM
33
45
Sun, 27 Sep   12 AM
33
43
Sun, 27 Sep   01 AM
32
40
Sun, 27 Sep   02 AM
31
38
Sun, 27 Sep   03 AM
29
35
Sun, 27 Sep   04 AM
27
33
Sun, 27 Sep   05 AM
25
31
Sun, 27 Sep   06 AM
24
29
Sun, 27 Sep   07 AM
22
28
Sun, 27 Sep   08 AM
22
26
Sun, 27 Sep   09 AM
24
26
Sun, 27 Sep   10 AM
31
26
Sun, 27 Sep   11 AM
37
27
Sun, 27 Sep   12 PM
40
28
Sun, 27 Sep   01 PM
42
30
Sun, 27 Sep   02 PM
43
33
Sun, 27 Sep   03 PM
44
36
Sun, 27 Sep   04 PM
45
38
Sun, 27 Sep   05 PM
45
41
Sun, 27 Sep   06 PM
43
42
Sun, 27 Sep   07 PM
42
43
Sun, 27 Sep   08 PM
38
43
Sun, 27 Sep   09 PM
35
42
Sun, 27 Sep   10 PM
32
41
Sun, 27 Sep   11 PM
30
39
Mon, 28 Sep   12 AM
29
37
Mon, 28 Sep   01 AM
28
35
Mon, 28 Sep   02 AM
27
33
Mon, 28 Sep   03 AM
27
31
Mon, 28 Sep   04 AM
26
29
Mon, 28 Sep   05 AM
24
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
Sat, 26 Sep  03 PM
291
108
Sat, 26 Sep  04 PM
336
110
Sat, 26 Sep  05 PM
284
128
Sat, 26 Sep  06 PM
216
147
Sat, 26 Sep  07 PM
44
157
Sat, 26 Sep  08 PM
53
156
Sat, 26 Sep  09 PM
76
154
Sat, 26 Sep  10 PM
114
112
Sat, 26 Sep  11 PM
89
93
Sun, 27 Sep  12 AM
90
84
Sun, 27 Sep  01 AM
72
78
Sun, 27 Sep  02 AM
66
58
Sun, 27 Sep  03 AM
23
46
Sun, 27 Sep  04 AM
16
41
Sun, 27 Sep  05 AM
7
36
Sun, 27 Sep  06 AM
15
29
Sun, 27 Sep  07 AM
12
23
Sun, 27 Sep  08 AM
9
24
Sun, 27 Sep  09 AM
16
26
Sun, 27 Sep  10 AM
3
31
Sun, 27 Sep  11 AM
2
39
Sun, 27 Sep  12 PM
2
48
Sun, 27 Sep  01 PM
7
63
Sun, 27 Sep  02 PM
10
77
Sun, 27 Sep  03 PM
57
89
Sun, 27 Sep  04 PM
123
142
Sun, 27 Sep  05 PM
167
183
Sun, 27 Sep  06 PM
65
166
Sun, 27 Sep  07 PM
21
101
Sun, 27 Sep  08 PM
0
61
Sun, 27 Sep  09 PM
0
41
Sun, 27 Sep  10 PM
0
30

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