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 07/27, 4Z)
80
69
*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
Tue, 26 Jul  01 PM
72
36
Tue, 26 Jul  02 PM
78
43
Tue, 26 Jul  03 PM
80
52
Tue, 26 Jul  04 PM
79
59
Tue, 26 Jul   05 PM
73
65
Tue, 26 Jul   06 PM
62
69
Tue, 26 Jul   07 PM
51
69
Tue, 26 Jul   08 PM
42
67
Tue, 26 Jul   09 PM
31
62
Tue, 26 Jul   10 PM
25
55
Tue, 26 Jul   11 PM
21
48
Wed, 27 Jul   12 AM
19
40
Wed, 27 Jul   01 AM
19
34
Wed, 27 Jul   02 AM
18
28
Wed, 27 Jul   03 AM
18
24
Wed, 27 Jul   04 AM
17
21
Wed, 27 Jul   05 AM
17
19
Wed, 27 Jul   06 AM
15
18
Wed, 27 Jul   07 AM
13
17
Wed, 27 Jul   08 AM
15
16
Wed, 27 Jul   09 AM
20
16
Wed, 27 Jul   10 AM
27
18
Wed, 27 Jul   11 AM
33
20
Wed, 27 Jul   12 PM
40
22
Wed, 27 Jul   01 PM
47
26
Wed, 27 Jul   02 PM
51
31
Wed, 27 Jul   03 PM
52
36
Wed, 27 Jul   04 PM
50
40
Wed, 27 Jul   05 PM
45
43
Wed, 27 Jul   06 PM
41
45
Wed, 27 Jul   07 PM
37
45
Wed, 27 Jul   08 PM
31
44
Wed, 27 Jul   09 PM
24
41
Wed, 27 Jul   10 PM
21
37
Wed, 27 Jul   11 PM
20
33
Thu, 28 Jul   12 AM
20
30
Thu, 28 Jul   01 AM
20
27
Thu, 28 Jul   02 AM
21
24
Thu, 28 Jul   03 AM
21
22
Thu, 28 Jul   04 AM
21
21
Thu, 28 Jul   05 AM
20
20
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Tue, 26 Jul  12 PM
0
0
Tue, 26 Jul  01 PM
0
0
Tue, 26 Jul  02 PM
0
0
Tue, 26 Jul  03 PM
0
0
Tue, 26 Jul  04 PM
0
1
Tue, 26 Jul  05 PM
0
1
Tue, 26 Jul  06 PM
0
2
Tue, 26 Jul  07 PM
4
2
Tue, 26 Jul  08 PM
0
2
Tue, 26 Jul  09 PM
0
1
Tue, 26 Jul  10 PM
0
1
Tue, 26 Jul  11 PM
0
1
Wed, 27 Jul  12 AM
0
0
Wed, 27 Jul  01 AM
0
0
Wed, 27 Jul  02 AM
0
0
Wed, 27 Jul  03 AM
0
0
Wed, 27 Jul  04 AM
0
0
Wed, 27 Jul  05 AM
0
0
Wed, 27 Jul  06 AM
0
0
Wed, 27 Jul  07 AM
0
0
Wed, 27 Jul  08 AM
0
0
Wed, 27 Jul  09 AM
0
0
Wed, 27 Jul  10 AM
0
0
Wed, 27 Jul  11 AM
0
0
Wed, 27 Jul  12 PM
0
0
Wed, 27 Jul  01 PM
0
0
Wed, 27 Jul  02 PM
0
0
Wed, 27 Jul  03 PM
0
0
Wed, 27 Jul  04 PM
0
0
Wed, 27 Jul  05 PM
0
0
Wed, 27 Jul  06 PM
0
0
Wed, 27 Jul  07 PM
0
0
Wed, 27 Jul  08 PM
0
0
Wed, 27 Jul  09 PM
0
0
Wed, 27 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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