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 06/30, 4Z)
56
54
*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
Wed, 29 Jun  01 PM
53
52
Wed, 29 Jun  02 PM
53
52
Wed, 29 Jun  03 PM
53
53
Wed, 29 Jun  04 PM
54
54
Wed, 29 Jun   05 PM
55
54
Wed, 29 Jun   06 PM
56
54
Wed, 29 Jun   07 PM
55
54
Wed, 29 Jun   08 PM
53
54
Wed, 29 Jun   09 PM
49
53
Wed, 29 Jun   10 PM
46
53
Wed, 29 Jun   11 PM
48
52
Thu, 30 Jun   12 AM
48
51
Thu, 30 Jun   01 AM
46
50
Thu, 30 Jun   02 AM
45
49
Thu, 30 Jun   03 AM
44
47
Thu, 30 Jun   04 AM
44
46
Thu, 30 Jun   05 AM
44
46
Thu, 30 Jun   06 AM
43
45
Thu, 30 Jun   07 AM
42
44
Thu, 30 Jun   08 AM
42
44
Thu, 30 Jun   09 AM
45
44
Thu, 30 Jun   10 AM
48
44
Thu, 30 Jun   11 AM
49
45
Thu, 30 Jun   12 PM
50
46
Thu, 30 Jun   01 PM
51
46
Thu, 30 Jun   02 PM
51
47
Thu, 30 Jun   03 PM
51
48
Thu, 30 Jun   04 PM
51
50
Thu, 30 Jun   05 PM
53
50
Thu, 30 Jun   06 PM
55
51
Thu, 30 Jun   07 PM
56
52
Thu, 30 Jun   08 PM
55
53
Thu, 30 Jun   09 PM
52
53
Thu, 30 Jun   10 PM
49
53
Thu, 30 Jun   11 PM
49
53
Fri, 01 Jul   12 AM
48
52
Fri, 01 Jul   01 AM
48
52
Fri, 01 Jul   02 AM
46
50
Fri, 01 Jul   03 AM
45
49
Fri, 01 Jul   04 AM
44
48
Fri, 01 Jul   05 AM
43
47
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Wed, 29 Jun  12 PM
0
1
Wed, 29 Jun  01 PM
0
0
Wed, 29 Jun  02 PM
0
0
Wed, 29 Jun  03 PM
0
0
Wed, 29 Jun  04 PM
0
1
Wed, 29 Jun  05 PM
0
0
Wed, 29 Jun  06 PM
0
0
Wed, 29 Jun  07 PM
0
0
Wed, 29 Jun  08 PM
0
0
Wed, 29 Jun  09 PM
0
0
Wed, 29 Jun  10 PM
0
0
Wed, 29 Jun  11 PM
0
0
Thu, 30 Jun  12 AM
0
0
Thu, 30 Jun  01 AM
0
0
Thu, 30 Jun  02 AM
0
0
Thu, 30 Jun  03 AM
0
0
Thu, 30 Jun  04 AM
0
0
Thu, 30 Jun  05 AM
0
0
Thu, 30 Jun  06 AM
0
0
Thu, 30 Jun  07 AM
0
0
Thu, 30 Jun  08 AM
0
0
Thu, 30 Jun  09 AM
0
0
Thu, 30 Jun  10 AM
0
0
Thu, 30 Jun  11 AM
0
0
Thu, 30 Jun  12 PM
0
0
Thu, 30 Jun  01 PM
0
0
Thu, 30 Jun  02 PM
0
0
Thu, 30 Jun  03 PM
0
0
Thu, 30 Jun  04 PM
0
0
Thu, 30 Jun  05 PM
0
0
Thu, 30 Jun  06 PM
0
0
Thu, 30 Jun  07 PM
0
0
Thu, 30 Jun  08 PM
0
0
Thu, 30 Jun  09 PM
0
0
Thu, 30 Jun  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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