NOAA - National Weather Service/Environmental Protection Agency

Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 42.46 N, longitude: 120.80 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 05/18, 4Z)	45	44

*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, 18 May 03 AM	34	37
Wed, 18 May 04 AM	34	36
Wed, 18 May 05 AM	34	36
Wed, 18 May 06 AM	34	35
Wed, 18 May 07 AM	33	35
Wed, 18 May 08 AM	39	35
Wed, 18 May 09 AM	42	36
Wed, 18 May 10 AM	42	37
Wed, 18 May 11 AM	42	37
Wed, 18 May 12 PM	42	38
Wed, 18 May 01 PM	42	39
Wed, 18 May 02 PM	42	40
Wed, 18 May 03 PM	41	41
Wed, 18 May 04 PM	41	42
Wed, 18 May 05 PM	42	42
Wed, 18 May 06 PM	42	42
Wed, 18 May 07 PM	42	42
Wed, 18 May 08 PM	42	42
Wed, 18 May 09 PM	42	42
Wed, 18 May 10 PM	41	42
Wed, 18 May 11 PM	41	42
Thu, 19 May 12 AM	40	41
Thu, 19 May 01 AM	40	41
Thu, 19 May 02 AM	39	41

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, 18 May 03 AM	0	0
Wed, 18 May 04 AM	0	0
Wed, 18 May 05 AM	0	0
Wed, 18 May 06 AM	0	0
Wed, 18 May 07 AM	0	0
Wed, 18 May 08 AM	0	0
Wed, 18 May 09 AM	0	0
Wed, 18 May 10 AM	0	0
Wed, 18 May 11 AM	0	0
Wed, 18 May 12 PM	0	0
Wed, 18 May 01 PM	0	0
Wed, 18 May 02 PM	0	0
Wed, 18 May 03 PM	0	0
Wed, 18 May 04 PM	0	0
Wed, 18 May 05 PM	0	0
Wed, 18 May 06 PM	0	0
Wed, 18 May 07 PM	0	1
Wed, 18 May 08 PM	0	1
Wed, 18 May 09 PM	0	0
Wed, 18 May 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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