Air Quality Forecast Guidance for Napa, CA

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 38.30 N, longitude: 122.28 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 09/24, 4Z)
59
51
*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
Thu, 23 Sep  01 PM
47
28
Thu, 23 Sep  02 PM
48
32
Thu, 23 Sep  03 PM
49
36
Thu, 23 Sep  04 PM
51
41
Thu, 23 Sep   05 PM
56
46
Thu, 23 Sep   06 PM
59
50
Thu, 23 Sep   07 PM
51
51
Thu, 23 Sep   08 PM
39
50
Thu, 23 Sep   09 PM
33
48
Thu, 23 Sep   10 PM
30
46
Thu, 23 Sep   11 PM
29
43
Fri, 24 Sep   12 AM
27
40
Fri, 24 Sep   01 AM
26
37
Fri, 24 Sep   02 AM
24
32
Fri, 24 Sep   03 AM
23
29
Fri, 24 Sep   04 AM
5
25
Fri, 24 Sep   05 AM
19
23
Fri, 24 Sep   06 AM
17
21
Fri, 24 Sep   07 AM
13
19
Fri, 24 Sep   08 AM
11
17
Fri, 24 Sep   09 AM
15
16
Fri, 24 Sep   10 AM
25
16
Fri, 24 Sep   11 AM
32
17
Fri, 24 Sep   12 PM
40
21
Fri, 24 Sep   01 PM
42
24
Fri, 24 Sep   02 PM
42
27
Fri, 24 Sep   03 PM
44
31
Fri, 24 Sep   04 PM
47
36
Fri, 24 Sep   05 PM
49
40
Fri, 24 Sep   06 PM
47
43
Fri, 24 Sep   07 PM
39
44
Fri, 24 Sep   08 PM
31
43
Fri, 24 Sep   09 PM
28
41
Fri, 24 Sep   10 PM
27
39
Fri, 24 Sep   11 PM
26
37
Sat, 25 Sep   12 AM
26
34
Sat, 25 Sep   01 AM
26
31
Sat, 25 Sep   02 AM
24
29
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Thu, 23 Sep  01 PM
1
0
Thu, 23 Sep  02 PM
0
0
Thu, 23 Sep  03 PM
0
0
Thu, 23 Sep  04 PM
0
0
Thu, 23 Sep  05 PM
0
0
Thu, 23 Sep  06 PM
0
0
Thu, 23 Sep  07 PM
0
0
Thu, 23 Sep  08 PM
1
0
Thu, 23 Sep  09 PM
3
0
Thu, 23 Sep  10 PM
3
0
Thu, 23 Sep  11 PM
0
0
Fri, 24 Sep  12 AM
0
1
Fri, 24 Sep  01 AM
2
2
Fri, 24 Sep  02 AM
6
2
Fri, 24 Sep  03 AM
6
2
Fri, 24 Sep  04 AM
7
2
Fri, 24 Sep  05 AM
11
2
Fri, 24 Sep  06 AM
8
2
Fri, 24 Sep  07 AM
12
3
Fri, 24 Sep  08 AM
0
3
Fri, 24 Sep  09 AM
5
4
Fri, 24 Sep  10 AM
5
4
Fri, 24 Sep  11 AM
0
4
Fri, 24 Sep  12 PM
5
5
Fri, 24 Sep  01 PM
4
4
Fri, 24 Sep  02 PM
4
3
Fri, 24 Sep  03 PM
1
3
Fri, 24 Sep  04 PM
1
2
Fri, 24 Sep  05 PM
1
2
Fri, 24 Sep  06 PM
2
1
Fri, 24 Sep  07 PM
3
1
Fri, 24 Sep  08 PM
3
1
Fri, 24 Sep  09 PM
4
1
Fri, 24 Sep  10 PM
3
1

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