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 02/24, 4Z)
44
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)

12Z Model Run
8 Hour Average Ozone
Concentration (PPB)

12Z Model Run
Thu, 23 Feb  12 PM
43
41
Thu, 23 Feb  01 PM
44
42
Thu, 23 Feb  02 PM
44
42
Thu, 23 Feb  03 PM
43
42
Thu, 23 Feb   04 PM
43
43
Thu, 23 Feb   05 PM
43
43
Thu, 23 Feb   06 PM
43
43
Thu, 23 Feb   07 PM
43
43
Thu, 23 Feb   08 PM
42
43
Thu, 23 Feb   09 PM
42
43
Thu, 23 Feb   10 PM
40
42
Thu, 23 Feb   11 PM
37
42
Fri, 24 Feb   12 AM
36
41
Fri, 24 Feb   01 AM
38
40
Fri, 24 Feb   02 AM
40
40
Fri, 24 Feb   03 AM
41
40
Fri, 24 Feb   04 AM
42
39
Fri, 24 Feb   05 AM
41
39
Fri, 24 Feb   06 AM
41
39
Fri, 24 Feb   07 AM
40
40
Fri, 24 Feb   08 AM
40
40
Fri, 24 Feb   09 AM
41
41
Fri, 24 Feb   10 AM
43
41
Fri, 24 Feb   11 AM
44
41
Fri, 24 Feb   12 PM
44
42
Fri, 24 Feb   01 PM
44
42
Fri, 24 Feb   02 PM
44
42
Fri, 24 Feb   03 PM
44
43
Fri, 24 Feb   04 PM
44
43
Fri, 24 Feb   05 PM
43
44
Fri, 24 Feb   06 PM
41
44
Fri, 24 Feb   07 PM
39
43
Fri, 24 Feb   08 PM
40
42
Fri, 24 Feb   09 PM
40
42
Fri, 24 Feb   10 PM
39
41
Fri, 24 Feb   11 PM
38
40
Sat, 25 Feb   12 AM
38
40
Sat, 25 Feb   01 AM
38
39
Sat, 25 Feb   02 AM
39
39
Sat, 25 Feb   03 AM
39
39
Sat, 25 Feb   04 AM
40
39
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Thu, 23 Feb  12 PM
0
0
Thu, 23 Feb  01 PM
0
0
Thu, 23 Feb  02 PM
0
0
Thu, 23 Feb  03 PM
0
0
Thu, 23 Feb  04 PM
0
0
Thu, 23 Feb  05 PM
0
0
Thu, 23 Feb  06 PM
0
0
Thu, 23 Feb  07 PM
0
0
Thu, 23 Feb  08 PM
0
0
Thu, 23 Feb  09 PM
0
0
Thu, 23 Feb  10 PM
0
0
Thu, 23 Feb  11 PM
0
0
Fri, 24 Feb  12 AM
0
0
Fri, 24 Feb  01 AM
0
0
Fri, 24 Feb  02 AM
0
0
Fri, 24 Feb  03 AM
0
0
Fri, 24 Feb  04 AM
0
0
Fri, 24 Feb  05 AM
0
0
Fri, 24 Feb  06 AM
0
0
Fri, 24 Feb  07 AM
0
0
Fri, 24 Feb  08 AM
0
0
Fri, 24 Feb  09 AM
0
0
Fri, 24 Feb  10 AM
0
0
Fri, 24 Feb  11 AM
0
0
Fri, 24 Feb  12 PM
0
0
Fri, 24 Feb  01 PM
0
0
Fri, 24 Feb  02 PM
0
0
Fri, 24 Feb  03 PM
0
0
Fri, 24 Feb  04 PM
0
0
Fri, 24 Feb  05 PM
0
0
Fri, 24 Feb  06 PM
0
0
Fri, 24 Feb  07 PM
0
0
Fri, 24 Feb  08 PM
0
0
Fri, 24 Feb  09 PM
0
0

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


    US Dept of Commerce
    National Oceanic and Atmospheric Administration
    National Weather Service
    1325 East West Highway
    Silver Spring, MD 20910
    Page Author: NWS Internet Services Team
Disclaimer
Information Quality
Credits
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities