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 10/02, 4Z)
45
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
Sat, 01 Oct  07 AM
26
28
Sat, 01 Oct  08 AM
24
27
Sat, 01 Oct  09 AM
26
27
Sat, 01 Oct  10 AM
32
28
Sat, 01 Oct  11 AM
36
28
Sat, 01 Oct  12 PM
39
30
Sat, 01 Oct  01 PM
42
31
Sat, 01 Oct  02 PM
43
33
Sat, 01 Oct  03 PM
44
36
Sat, 01 Oct  04 PM
45
38
Sat, 01 Oct   05 PM
45
41
Sat, 01 Oct   06 PM
42
42
Sat, 01 Oct   07 PM
37
42
Sat, 01 Oct   08 PM
34
41
Sat, 01 Oct   09 PM
33
40
Sat, 01 Oct   10 PM
32
39
Sat, 01 Oct   11 PM
31
37
Sun, 02 Oct   12 AM
30
36
Sun, 02 Oct   01 AM
30
34
Sun, 02 Oct   02 AM
29
32
Sun, 02 Oct   03 AM
29
31
Sun, 02 Oct   04 AM
29
30
Sun, 02 Oct   05 AM
30
30
Sun, 02 Oct   06 AM
32
30
Sun, 02 Oct   07 AM
35
30
Sun, 02 Oct   08 AM
38
31
Sun, 02 Oct   09 AM
38
32
Sun, 02 Oct   10 AM
39
34
Sun, 02 Oct   11 AM
42
35
Sun, 02 Oct   12 PM
43
37
Sun, 02 Oct   01 PM
43
39
Sun, 02 Oct   02 PM
43
40
Sun, 02 Oct   03 PM
43
41
Sun, 02 Oct   04 PM
42
42
Sun, 02 Oct   05 PM
41
42
Sun, 02 Oct   06 PM
41
42
Sun, 02 Oct   07 PM
39
42
Sun, 02 Oct   08 PM
36
41
Sun, 02 Oct   09 PM
34
40
Sun, 02 Oct   10 PM
32
39
Sun, 02 Oct   11 PM
29
37
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, 01 Oct  06 AM
0
0
Sat, 01 Oct  07 AM
0
0
Sat, 01 Oct  08 AM
0
0
Sat, 01 Oct  09 AM
0
0
Sat, 01 Oct  10 AM
0
0
Sat, 01 Oct  11 AM
0
0
Sat, 01 Oct  12 PM
0
0
Sat, 01 Oct  01 PM
0
0
Sat, 01 Oct  02 PM
0
0
Sat, 01 Oct  03 PM
0
0
Sat, 01 Oct  04 PM
0
0
Sat, 01 Oct  05 PM
0
0
Sat, 01 Oct  06 PM
0
0
Sat, 01 Oct  07 PM
0
0
Sat, 01 Oct  08 PM
0
0
Sat, 01 Oct  09 PM
0
0
Sat, 01 Oct  10 PM
0
0
Sat, 01 Oct  11 PM
0
0
Sun, 02 Oct  12 AM
0
0
Sun, 02 Oct  01 AM
0
0
Sun, 02 Oct  02 AM
0
0
Sun, 02 Oct  03 AM
0
0
Sun, 02 Oct  04 AM
0
0
Sun, 02 Oct  05 AM
0
0
Sun, 02 Oct  06 AM
0
0
Sun, 02 Oct  07 AM
0
0
Sun, 02 Oct  08 AM
0
0
Sun, 02 Oct  09 AM
0
0
Sun, 02 Oct  10 AM
0
0
Sun, 02 Oct  11 AM
0
0
Sun, 02 Oct  12 PM
0
0
Sun, 02 Oct  01 PM
0
0
Sun, 02 Oct  02 PM
0
0
Sun, 02 Oct  03 PM
0
0
Sun, 02 Oct  04 PM
0
0
Sun, 02 Oct  05 PM
0
0
Sun, 02 Oct  06 PM
0
0
Sun, 02 Oct  07 PM
0
0
Sun, 02 Oct  08 PM
0
0
Sun, 02 Oct  09 PM
0
0
Sun, 02 Oct  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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