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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 07/25, 4Z)
56
48
*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
Thu, 24 Jul  07 AM
12
17
Thu, 24 Jul  08 AM
16
16
Thu, 24 Jul  09 AM
32
18
Thu, 24 Jul  10 AM
39
20
Thu, 24 Jul  11 AM
38
23
Thu, 24 Jul  12 PM
40
26
Thu, 24 Jul  01 PM
41
29
Thu, 24 Jul  02 PM
42
32
Thu, 24 Jul  03 PM
44
36
Thu, 24 Jul  04 PM
47
40
Thu, 24 Jul   05 PM
52
43
Thu, 24 Jul   06 PM
56
45
Thu, 24 Jul   07 PM
54
47
Thu, 24 Jul   08 PM
46
48
Thu, 24 Jul   09 PM
37
47
Thu, 24 Jul   10 PM
31
46
Thu, 24 Jul   11 PM
27
44
Fri, 25 Jul   12 AM
24
41
Fri, 25 Jul   01 AM
23
37
Fri, 25 Jul   02 AM
22
33
Fri, 25 Jul   03 AM
22
29
Fri, 25 Jul   04 AM
22
26
Fri, 25 Jul   05 AM
23
24
Fri, 25 Jul   06 AM
23
23
Fri, 25 Jul   07 AM
23
23
Fri, 25 Jul   08 AM
25
23
Fri, 25 Jul   09 AM
36
24
Fri, 25 Jul   10 AM
44
27
Fri, 25 Jul   11 AM
45
30
Fri, 25 Jul   12 PM
45
33
Fri, 25 Jul   01 PM
46
36
Fri, 25 Jul   02 PM
49
39
Fri, 25 Jul   03 PM
51
43
Fri, 25 Jul   04 PM
54
46
Fri, 25 Jul   05 PM
61
50
Fri, 25 Jul   06 PM
65
52
Fri, 25 Jul   07 PM
59
54
Fri, 25 Jul   08 PM
47
54
Fri, 25 Jul   09 PM
41
53
Fri, 25 Jul   10 PM
35
52
Fri, 25 Jul   11 PM
29
49
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, 24 Jul  07 AM
0
0
Thu, 24 Jul  08 AM
0
0
Thu, 24 Jul  09 AM
0
0
Thu, 24 Jul  10 AM
0
0
Thu, 24 Jul  11 AM
0
0
Thu, 24 Jul  12 PM
0
0
Thu, 24 Jul  01 PM
0
0
Thu, 24 Jul  02 PM
0
0
Thu, 24 Jul  03 PM
0
0
Thu, 24 Jul  04 PM
0
0
Thu, 24 Jul  05 PM
0
0
Thu, 24 Jul  06 PM
0
0
Thu, 24 Jul  07 PM
0
0
Thu, 24 Jul  08 PM
0
0
Thu, 24 Jul  09 PM
0
0
Thu, 24 Jul  10 PM
0
0
Thu, 24 Jul  11 PM
0
0
Fri, 25 Jul  12 AM
0
0
Fri, 25 Jul  01 AM
0
0
Fri, 25 Jul  02 AM
0
0
Fri, 25 Jul  03 AM
0
0
Fri, 25 Jul  04 AM
0
0
Fri, 25 Jul  05 AM
0
0
Fri, 25 Jul  06 AM
0
0
Fri, 25 Jul  07 AM
0
0
Fri, 25 Jul  08 AM
0
0
Fri, 25 Jul  09 AM
0
0
Fri, 25 Jul  10 AM
0
0
Fri, 25 Jul  11 AM
0
0
Fri, 25 Jul  12 PM
0
0
Fri, 25 Jul  01 PM
0
0
Fri, 25 Jul  02 PM
0
0
Fri, 25 Jul  03 PM
0
0
Fri, 25 Jul  04 PM
0
0
Fri, 25 Jul  05 PM
0
0
Fri, 25 Jul  06 PM
0
0
Fri, 25 Jul  07 PM
0
0
Fri, 25 Jul  08 PM
0
0
Fri, 25 Jul  09 PM
0
0
Fri, 25 Jul  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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