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 05/30, 4Z)
46
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
Sun, 29 May  08 AM
19
20
Sun, 29 May  09 AM
25
20
Sun, 29 May  10 AM
31
22
Sun, 29 May  11 AM
36
24
Sun, 29 May  12 PM
40
26
Sun, 29 May  01 PM
42
29
Sun, 29 May  02 PM
45
32
Sun, 29 May  03 PM
46
36
Sun, 29 May  04 PM
44
39
Sun, 29 May   05 PM
42
41
Sun, 29 May   06 PM
39
42
Sun, 29 May   07 PM
36
42
Sun, 29 May   08 PM
31
41
Sun, 29 May   09 PM
26
39
Sun, 29 May   10 PM
24
36
Sun, 29 May   11 PM
22
33
Mon, 30 May   12 AM
22
30
Mon, 30 May   01 AM
20
28
Mon, 30 May   02 AM
19
25
Mon, 30 May   03 AM
18
23
Mon, 30 May   04 AM
17
21
Mon, 30 May   05 AM
16
20
Mon, 30 May   06 AM
16
19
Mon, 30 May   07 AM
16
18
Mon, 30 May   08 AM
18
18
Mon, 30 May   09 AM
23
18
Mon, 30 May   10 AM
28
19
Mon, 30 May   11 AM
34
21
Mon, 30 May   12 PM
43
24
Mon, 30 May   01 PM
52
29
Mon, 30 May   02 PM
57
34
Mon, 30 May   03 PM
55
39
Mon, 30 May   04 PM
47
42
Mon, 30 May   05 PM
44
45
Mon, 30 May   06 PM
45
47
Mon, 30 May   07 PM
43
48
Mon, 30 May   08 PM
36
47
Mon, 30 May   09 PM
27
44
Mon, 30 May   10 PM
22
40
Mon, 30 May   11 PM
20
36
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Sun, 29 May  08 AM
0
0
Sun, 29 May  09 AM
0
0
Sun, 29 May  10 AM
0
0
Sun, 29 May  11 AM
0
0
Sun, 29 May  12 PM
0
0
Sun, 29 May  01 PM
0
0
Sun, 29 May  02 PM
0
0
Sun, 29 May  03 PM
0
0
Sun, 29 May  04 PM
0
0
Sun, 29 May  05 PM
0
0
Sun, 29 May  06 PM
0
0
Sun, 29 May  07 PM
0
0
Sun, 29 May  08 PM
0
0
Sun, 29 May  09 PM
0
0
Sun, 29 May  10 PM
0
0
Sun, 29 May  11 PM
0
0
Mon, 30 May  12 AM
0
0
Mon, 30 May  01 AM
0
0
Mon, 30 May  02 AM
0
0
Mon, 30 May  03 AM
0
0
Mon, 30 May  04 AM
0
0
Mon, 30 May  05 AM
0
0
Mon, 30 May  06 AM
0
0
Mon, 30 May  07 AM
0
0
Mon, 30 May  08 AM
0
0
Mon, 30 May  09 AM
0
0
Mon, 30 May  10 AM
0
0
Mon, 30 May  11 AM
0
0
Mon, 30 May  12 PM
0
0
Mon, 30 May  01 PM
0
0
Mon, 30 May  02 PM
0
0
Mon, 30 May  03 PM
0
0
Mon, 30 May  04 PM
0
0
Mon, 30 May  05 PM
0
0
Mon, 30 May  06 PM
0
0
Mon, 30 May  07 PM
0
0
Mon, 30 May  08 PM
0
0
Mon, 30 May  09 PM
0
0
Mon, 30 May  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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