Air Quality Forecast Guidance for Hetch Hetchy, CA

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 37.95 N, longitude: 119.79 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 04/27, 4Z)
49
49
*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, 26 Apr  08 AM
43
43
Sun, 26 Apr  09 AM
45
43
Sun, 26 Apr  10 AM
47
43
Sun, 26 Apr  11 AM
49
44
Sun, 26 Apr  12 PM
50
45
Sun, 26 Apr  01 PM
49
46
Sun, 26 Apr  02 PM
49
47
Sun, 26 Apr  03 PM
48
48
Sun, 26 Apr  04 PM
48
48
Sun, 26 Apr   05 PM
48
48
Sun, 26 Apr   06 PM
48
49
Sun, 26 Apr   07 PM
49
49
Sun, 26 Apr   08 PM
48
48
Sun, 26 Apr   09 PM
46
48
Sun, 26 Apr   10 PM
44
47
Sun, 26 Apr   11 PM
44
47
Mon, 27 Apr   12 AM
45
47
Mon, 27 Apr   01 AM
46
46
Mon, 27 Apr   02 AM
47
46
Mon, 27 Apr   03 AM
47
46
Mon, 27 Apr   04 AM
48
46
Mon, 27 Apr   05 AM
48
46
Mon, 27 Apr   06 AM
49
47
Mon, 27 Apr   07 AM
50
48
Mon, 27 Apr   08 AM
51
48
Mon, 27 Apr   09 AM
52
49
Mon, 27 Apr   10 AM
52
50
Mon, 27 Apr   11 AM
53
50
Mon, 27 Apr   12 PM
54
51
Mon, 27 Apr   01 PM
54
52
Mon, 27 Apr   02 PM
55
52
Mon, 27 Apr   03 PM
54
53
Mon, 27 Apr   04 PM
53
53
Mon, 27 Apr   05 PM
51
53
Mon, 27 Apr   06 PM
49
53
Mon, 27 Apr   07 PM
48
52
Mon, 27 Apr   08 PM
47
51
Mon, 27 Apr   09 PM
44
50
Mon, 27 Apr   10 PM
44
49
Mon, 27 Apr   11 PM
48
48
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, 26 Apr  08 AM
0
0
Sun, 26 Apr  09 AM
0
0
Sun, 26 Apr  10 AM
0
0
Sun, 26 Apr  11 AM
0
0
Sun, 26 Apr  12 PM
0
0
Sun, 26 Apr  01 PM
0
0
Sun, 26 Apr  02 PM
0
0
Sun, 26 Apr  03 PM
0
0
Sun, 26 Apr  04 PM
0
0
Sun, 26 Apr  05 PM
0
0
Sun, 26 Apr  06 PM
0
0
Sun, 26 Apr  07 PM
0
0
Sun, 26 Apr  08 PM
0
0
Sun, 26 Apr  09 PM
0
0
Sun, 26 Apr  10 PM
0
0
Sun, 26 Apr  11 PM
0
0
Mon, 27 Apr  12 AM
0
0
Mon, 27 Apr  01 AM
0
0
Mon, 27 Apr  02 AM
0
0
Mon, 27 Apr  03 AM
0
0
Mon, 27 Apr  04 AM
0
0
Mon, 27 Apr  05 AM
0
0
Mon, 27 Apr  06 AM
0
0
Mon, 27 Apr  07 AM
0
0
Mon, 27 Apr  08 AM
0
0
Mon, 27 Apr  09 AM
0
0
Mon, 27 Apr  10 AM
0
0
Mon, 27 Apr  11 AM
0
0
Mon, 27 Apr  12 PM
0
0
Mon, 27 Apr  01 PM
0
0
Mon, 27 Apr  02 PM
0
0
Mon, 27 Apr  03 PM
0
0
Mon, 27 Apr  04 PM
0
0
Mon, 27 Apr  05 PM
0
0
Mon, 27 Apr  06 PM
0
0
Mon, 27 Apr  07 PM
0
0
Mon, 27 Apr  08 PM
0
0
Mon, 27 Apr  09 PM
0
0
Mon, 27 Apr  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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