Air Quality Forecast Guidance for Elkhorn, CA

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 36.82 N, longitude: 121.73 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 09/21, 4Z)
52
45
*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
Mon, 20 Sep  10 PM
27
38
Mon, 20 Sep  11 PM
25
35
Tue, 21 Sep  12 AM
23
32
Tue, 21 Sep  01 AM
23
29
Tue, 21 Sep  02 AM
23
27
Tue, 21 Sep  03 AM
23
26
Tue, 21 Sep  04 AM
21
24
Tue, 21 Sep  05 AM
17
23
Tue, 21 Sep  06 AM
19
22
Tue, 21 Sep  07 AM
16
21
Tue, 21 Sep  08 AM
15
20
Tue, 21 Sep  09 AM
18
19
Tue, 21 Sep  10 AM
33
20
Tue, 21 Sep  11 AM
42
23
Tue, 21 Sep  12 PM
47
26
Tue, 21 Sep  01 PM
51
30
Tue, 21 Sep  02 PM
51
34
Tue, 21 Sep  03 PM
48
38
Tue, 21 Sep  04 PM
45
42
Tue, 21 Sep   05 PM
44
45
Tue, 21 Sep   06 PM
42
46
Tue, 21 Sep   07 PM
40
46
Tue, 21 Sep   08 PM
36
45
Tue, 21 Sep   09 PM
33
42
Tue, 21 Sep   10 PM
32
40
Tue, 21 Sep   11 PM
29
38
Wed, 22 Sep   12 AM
27
35
Wed, 22 Sep   01 AM
25
33
Wed, 22 Sep   02 AM
23
31
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Mon, 20 Sep  10 PM
1
1
Mon, 20 Sep  11 PM
3
1
Tue, 21 Sep  12 AM
5
3
Tue, 21 Sep  01 AM
10
3
Tue, 21 Sep  02 AM
12
7
Tue, 21 Sep  03 AM
9
8
Tue, 21 Sep  04 AM
8
14
Tue, 21 Sep  05 AM
10
17
Tue, 21 Sep  06 AM
19
20
Tue, 21 Sep  07 AM
36
22
Tue, 21 Sep  08 AM
54
25
Tue, 21 Sep  09 AM
53
30
Tue, 21 Sep  10 AM
55
24
Tue, 21 Sep  11 AM
96
16
Tue, 21 Sep  12 PM
118
15
Tue, 21 Sep  01 PM
28
16
Tue, 21 Sep  02 PM
28
19
Tue, 21 Sep  03 PM
37
19
Tue, 21 Sep  04 PM
16
14
Tue, 21 Sep  05 PM
29
17
Tue, 21 Sep  06 PM
78
18
Tue, 21 Sep  07 PM
33
11
Tue, 21 Sep  08 PM
37
11
Tue, 21 Sep  09 PM
4
13
Tue, 21 Sep  10 PM
0
11

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


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