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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 03/01, 4Z)
43
43
*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, 28 Feb  06 AM
40
40
Sat, 28 Feb  07 AM
40
40
Sat, 28 Feb  08 AM
40
40
Sat, 28 Feb  09 AM
40
40
Sat, 28 Feb  10 AM
41
40
Sat, 28 Feb  11 AM
42
40
Sat, 28 Feb  12 PM
43
41
Sat, 28 Feb  01 PM
43
41
Sat, 28 Feb  02 PM
43
42
Sat, 28 Feb  03 PM
43
42
Sat, 28 Feb   04 PM
43
42
Sat, 28 Feb   05 PM
42
42
Sat, 28 Feb   06 PM
42
42
Sat, 28 Feb   07 PM
41
42
Sat, 28 Feb   08 PM
40
42
Sat, 28 Feb   09 PM
41
42
Sat, 28 Feb   10 PM
40
42
Sat, 28 Feb   11 PM
39
41
Sun, 01 Mar   12 AM
38
40
Sun, 01 Mar   01 AM
38
40
Sun, 01 Mar   02 AM
37
39
Sun, 01 Mar   03 AM
35
39
Sun, 01 Mar   04 AM
35
38
Sun, 01 Mar   05 AM
38
38
Sun, 01 Mar   06 AM
40
38
Sun, 01 Mar   07 AM
40
38
Sun, 01 Mar   08 AM
42
38
Sun, 01 Mar   09 AM
44
39
Sun, 01 Mar   10 AM
46
40
Sun, 01 Mar   11 AM
46
42
Sun, 01 Mar   12 PM
46
43
Sun, 01 Mar   01 PM
46
44
Sun, 01 Mar   02 PM
46
44
Sun, 01 Mar   03 PM
46
45
Sun, 01 Mar   04 PM
46
46
Sun, 01 Mar   05 PM
46
46
Sun, 01 Mar   06 PM
46
46
Sun, 01 Mar   07 PM
45
46
Sun, 01 Mar   08 PM
44
46
Sun, 01 Mar   09 PM
43
45
Sun, 01 Mar   10 PM
41
45
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, 28 Feb  05 AM
0
0
Sat, 28 Feb  06 AM
0
0
Sat, 28 Feb  07 AM
0
0
Sat, 28 Feb  08 AM
0
0
Sat, 28 Feb  09 AM
0
0
Sat, 28 Feb  10 AM
0
0
Sat, 28 Feb  11 AM
0
0
Sat, 28 Feb  12 PM
0
0
Sat, 28 Feb  01 PM
0
0
Sat, 28 Feb  02 PM
0
0
Sat, 28 Feb  03 PM
0
0
Sat, 28 Feb  04 PM
0
0
Sat, 28 Feb  05 PM
0
0
Sat, 28 Feb  06 PM
0
0
Sat, 28 Feb  07 PM
0
0
Sat, 28 Feb  08 PM
0
0
Sat, 28 Feb  09 PM
0
0
Sat, 28 Feb  10 PM
0
0
Sat, 28 Feb  11 PM
0
0
Sun, 01 Mar  12 AM
0
0
Sun, 01 Mar  01 AM
0
0
Sun, 01 Mar  02 AM
0
0
Sun, 01 Mar  03 AM
0
0
Sun, 01 Mar  04 AM
0
0
Sun, 01 Mar  05 AM
0
0
Sun, 01 Mar  06 AM
0
0
Sun, 01 Mar  07 AM
0
0
Sun, 01 Mar  08 AM
0
0
Sun, 01 Mar  09 AM
0
0
Sun, 01 Mar  10 AM
0
0
Sun, 01 Mar  11 AM
0
0
Sun, 01 Mar  12 PM
0
0
Sun, 01 Mar  01 PM
0
0
Sun, 01 Mar  02 PM
0
0
Sun, 01 Mar  03 PM
0
0
Sun, 01 Mar  04 PM
0
0
Sun, 01 Mar  05 PM
0
0
Sun, 01 Mar  06 PM
0
0
Sun, 01 Mar  07 PM
0
0
Sun, 01 Mar  08 PM
0
0
Sun, 01 Mar  09 PM
0
0

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Environmental Protection Agency AirNow Forecast Page
Graphical Air Quality Forecast Guidance
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