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 12/21, 4Z)
45
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)

6Z Model Run
8 Hour Average Ozone
Concentration (PPB)

6Z Model Run
Sat, 20 Dec  06 AM
45
44
Sat, 20 Dec  07 AM
45
44
Sat, 20 Dec  08 AM
45
44
Sat, 20 Dec  09 AM
45
45
Sat, 20 Dec  10 AM
44
45
Sat, 20 Dec  11 AM
44
45
Sat, 20 Dec  12 PM
44
45
Sat, 20 Dec  01 PM
43
44
Sat, 20 Dec  02 PM
43
44
Sat, 20 Dec  03 PM
43
44
Sat, 20 Dec   04 PM
42
44
Sat, 20 Dec   05 PM
42
43
Sat, 20 Dec   06 PM
41
43
Sat, 20 Dec   07 PM
42
42
Sat, 20 Dec   08 PM
43
42
Sat, 20 Dec   09 PM
43
42
Sat, 20 Dec   10 PM
44
42
Sat, 20 Dec   11 PM
45
43
Sun, 21 Dec   12 AM
45
43
Sun, 21 Dec   01 AM
45
44
Sun, 21 Dec   02 AM
45
44
Sun, 21 Dec   03 AM
44
44
Sun, 21 Dec   04 AM
44
44
Sun, 21 Dec   05 AM
43
44
Sun, 21 Dec   06 AM
43
44
Sun, 21 Dec   07 AM
44
44
Sun, 21 Dec   08 AM
44
44
Sun, 21 Dec   09 AM
44
44
Sun, 21 Dec   10 AM
44
44
Sun, 21 Dec   11 AM
44
44
Sun, 21 Dec   12 PM
44
44
Sun, 21 Dec   01 PM
44
44
Sun, 21 Dec   02 PM
44
44
Sun, 21 Dec   03 PM
44
44
Sun, 21 Dec   04 PM
43
44
Sun, 21 Dec   05 PM
42
44
Sun, 21 Dec   06 PM
43
44
Sun, 21 Dec   07 PM
45
44
Sun, 21 Dec   08 PM
46
44
Sun, 21 Dec   09 PM
46
44
Sun, 21 Dec   10 PM
46
44
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Sat, 20 Dec  05 AM
0
0
Sat, 20 Dec  06 AM
0
0
Sat, 20 Dec  07 AM
0
0
Sat, 20 Dec  08 AM
0
0
Sat, 20 Dec  09 AM
0
0
Sat, 20 Dec  10 AM
0
0
Sat, 20 Dec  11 AM
0
0
Sat, 20 Dec  12 PM
0
0
Sat, 20 Dec  01 PM
0
0
Sat, 20 Dec  02 PM
0
0
Sat, 20 Dec  03 PM
0
0
Sat, 20 Dec  04 PM
0
0
Sat, 20 Dec  05 PM
0
0
Sat, 20 Dec  06 PM
0
0
Sat, 20 Dec  07 PM
0
0
Sat, 20 Dec  08 PM
0
0
Sat, 20 Dec  09 PM
0
0
Sat, 20 Dec  10 PM
0
0
Sat, 20 Dec  11 PM
0
0
Sun, 21 Dec  12 AM
0
0
Sun, 21 Dec  01 AM
0
0
Sun, 21 Dec  02 AM
0
0
Sun, 21 Dec  03 AM
0
0
Sun, 21 Dec  04 AM
0
0
Sun, 21 Dec  05 AM
0
0
Sun, 21 Dec  06 AM
0
0
Sun, 21 Dec  07 AM
0
0
Sun, 21 Dec  08 AM
0
0
Sun, 21 Dec  09 AM
0
0
Sun, 21 Dec  10 AM
0
0
Sun, 21 Dec  11 AM
0
0
Sun, 21 Dec  12 PM
0
0
Sun, 21 Dec  01 PM
0
0
Sun, 21 Dec  02 PM
0
0
Sun, 21 Dec  03 PM
0
0
Sun, 21 Dec  04 PM
0
0
Sun, 21 Dec  05 PM
0
0
Sun, 21 Dec  06 PM
0
0
Sun, 21 Dec  07 PM
0
0
Sun, 21 Dec  08 PM
0
0
Sun, 21 Dec  09 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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