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 09/04, 4Z)
43
39
*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, 03 Sep  01 PM
39
25
Thu, 03 Sep  02 PM
42
28
Thu, 03 Sep  03 PM
42
31
Thu, 03 Sep  04 PM
42
34
Thu, 03 Sep   05 PM
41
36
Thu, 03 Sep   06 PM
39
38
Thu, 03 Sep   07 PM
36
39
Thu, 03 Sep   08 PM
30
39
Thu, 03 Sep   09 PM
26
37
Thu, 03 Sep   10 PM
22
35
Thu, 03 Sep   11 PM
19
32
Fri, 04 Sep   12 AM
18
29
Fri, 04 Sep   01 AM
17
26
Fri, 04 Sep   02 AM
17
23
Fri, 04 Sep   03 AM
17
21
Fri, 04 Sep   04 AM
17
19
Fri, 04 Sep   05 AM
17
18
Fri, 04 Sep   06 AM
14
17
Fri, 04 Sep   07 AM
10
16
Fri, 04 Sep   08 AM
10
15
Fri, 04 Sep   09 AM
16
15
Fri, 04 Sep   10 AM
24
16
Fri, 04 Sep   11 AM
31
18
Fri, 04 Sep   12 PM
37
20
Fri, 04 Sep   01 PM
42
23
Fri, 04 Sep   02 PM
42
27
Fri, 04 Sep   03 PM
43
31
Fri, 04 Sep   04 PM
42
35
Fri, 04 Sep   05 PM
40
38
Fri, 04 Sep   06 PM
38
40
Fri, 04 Sep   07 PM
35
40
Fri, 04 Sep   08 PM
31
39
Fri, 04 Sep   09 PM
29
38
Fri, 04 Sep   10 PM
28
36
Fri, 04 Sep   11 PM
28
34
Sat, 05 Sep   12 AM
28
32
Sat, 05 Sep   01 AM
28
30
Sat, 05 Sep   02 AM
27
29
Sat, 05 Sep   03 AM
26
28
Sat, 05 Sep   04 AM
24
27
Sat, 05 Sep   05 AM
22
26
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, 03 Sep  12 PM
0
0
Thu, 03 Sep  01 PM
0
0
Thu, 03 Sep  02 PM
0
0
Thu, 03 Sep  03 PM
0
0
Thu, 03 Sep  04 PM
0
0
Thu, 03 Sep  05 PM
0
0
Thu, 03 Sep  06 PM
0
0
Thu, 03 Sep  07 PM
0
0
Thu, 03 Sep  08 PM
0
0
Thu, 03 Sep  09 PM
0
0
Thu, 03 Sep  10 PM
0
0
Thu, 03 Sep  11 PM
0
0
Fri, 04 Sep  12 AM
0
0
Fri, 04 Sep  01 AM
0
0
Fri, 04 Sep  02 AM
0
0
Fri, 04 Sep  03 AM
0
0
Fri, 04 Sep  04 AM
0
0
Fri, 04 Sep  05 AM
0
0
Fri, 04 Sep  06 AM
0
0
Fri, 04 Sep  07 AM
0
0
Fri, 04 Sep  08 AM
0
0
Fri, 04 Sep  09 AM
0
0
Fri, 04 Sep  10 AM
0
0
Fri, 04 Sep  11 AM
0
0
Fri, 04 Sep  12 PM
0
0
Fri, 04 Sep  01 PM
0
0
Fri, 04 Sep  02 PM
0
0
Fri, 04 Sep  03 PM
0
0
Fri, 04 Sep  04 PM
0
0
Fri, 04 Sep  05 PM
0
0
Fri, 04 Sep  06 PM
0
0
Fri, 04 Sep  07 PM
0
0
Fri, 04 Sep  08 PM
0
0
Fri, 04 Sep  09 PM
0
0
Fri, 04 Sep  10 PM
0
0

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