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 08/19, 4Z)
56
47
*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
Fri, 18 Aug  03 PM
56
40
Fri, 18 Aug  04 PM
52
44
Fri, 18 Aug   05 PM
46
46
Fri, 18 Aug   06 PM
38
47
Fri, 18 Aug   07 PM
30
46
Fri, 18 Aug   08 PM
25
44
Fri, 18 Aug   09 PM
21
40
Fri, 18 Aug   10 PM
20
36
Fri, 18 Aug   11 PM
19
31
Sat, 19 Aug   12 AM
20
27
Sat, 19 Aug   01 AM
20
24
Sat, 19 Aug   02 AM
20
22
Sat, 19 Aug   03 AM
20
21
Sat, 19 Aug   04 AM
20
20
Sat, 19 Aug   05 AM
20
20
Sat, 19 Aug   06 AM
20
20
Sat, 19 Aug   07 AM
19
20
Sat, 19 Aug   08 AM
19
20
Sat, 19 Aug   09 AM
21
20
Sat, 19 Aug   10 AM
23
20
Sat, 19 Aug   11 AM
26
21
Sat, 19 Aug   12 PM
31
22
Sat, 19 Aug   01 PM
35
24
Sat, 19 Aug   02 PM
38
27
Sat, 19 Aug   03 PM
37
29
Sat, 19 Aug   04 PM
36
31
Sat, 19 Aug   05 PM
34
33
Sat, 19 Aug   06 PM
33
34
Sat, 19 Aug   07 PM
31
34
Sat, 19 Aug   08 PM
27
34
Sat, 19 Aug   09 PM
24
32
Sat, 19 Aug   10 PM
22
30
Sat, 19 Aug   11 PM
21
28
Sun, 20 Aug   12 AM
21
27
Sun, 20 Aug   01 AM
21
25
Sun, 20 Aug   02 AM
21
23
Sun, 20 Aug   03 AM
21
22
Sun, 20 Aug   04 AM
21
21
Sun, 20 Aug   05 AM
21
21
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Fri, 18 Aug  03 PM
20
9
Fri, 18 Aug  04 PM
45
8
Fri, 18 Aug  05 PM
32
11
Fri, 18 Aug  06 PM
41
10
Fri, 18 Aug  07 PM
23
5
Fri, 18 Aug  08 PM
17
7
Fri, 18 Aug  09 PM
15
13
Fri, 18 Aug  10 PM
0
21
Fri, 18 Aug  11 PM
25
27
Sat, 19 Aug  12 AM
32
23
Sat, 19 Aug  01 AM
45
23
Sat, 19 Aug  02 AM
157
26
Sat, 19 Aug  03 AM
137
29
Sat, 19 Aug  04 AM
132
34
Sat, 19 Aug  05 AM
51
33
Sat, 19 Aug  06 AM
178
35
Sat, 19 Aug  07 AM
147
54
Sat, 19 Aug  08 AM
102
71
Sat, 19 Aug  09 AM
65
74
Sat, 19 Aug  10 AM
70
81
Sat, 19 Aug  11 AM
93
69
Sat, 19 Aug  12 PM
120
46
Sat, 19 Aug  01 PM
45
32
Sat, 19 Aug  02 PM
63
28
Sat, 19 Aug  03 PM
39
34
Sat, 19 Aug  04 PM
51
43
Sat, 19 Aug  05 PM
64
53
Sat, 19 Aug  06 PM
66
41
Sat, 19 Aug  07 PM
78
36
Sat, 19 Aug  08 PM
125
50
Sat, 19 Aug  09 PM
175
68
Sat, 19 Aug  10 PM
380
92

National Weather Service Air Quality Program Page
Environmental Protection Agency AirNow Forecast Page
Graphical Air Quality Forecast Guidance
FAQ


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