Air Quality Forecast Guidance for St. Helena, NC

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 34.51 N, longitude: 77.89 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 09/19, 4Z)
53
50
*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
Fri, 19 Sep  12 AM
50
50
Fri, 19 Sep  01 AM
49
50
Fri, 19 Sep  02 AM
48
50
Fri, 19 Sep  03 AM
47
50
Fri, 19 Sep  04 AM
46
50
Fri, 19 Sep  05 AM
45
49
Fri, 19 Sep  06 AM
44
48
Fri, 19 Sep  07 AM
44
47
Fri, 19 Sep  08 AM
44
46
Fri, 19 Sep  09 AM
43
45
Fri, 19 Sep  10 AM
48
45
Fri, 19 Sep  11 AM
52
46
Fri, 19 Sep  12 PM
53
47
Fri, 19 Sep  01 PM
52
48
Fri, 19 Sep  02 PM
52
48
Fri, 19 Sep  03 PM
51
49
Fri, 19 Sep  04 PM
50
50
Fri, 19 Sep  05 PM
51
51
Fri, 19 Sep  06 PM
53
52
Fri, 19 Sep  07 PM
54
52
Fri, 19 Sep   08 PM
54
52
Fri, 19 Sep   09 PM
53
52
Fri, 19 Sep   10 PM
53
52
Fri, 19 Sep   11 PM
53
53
Sat, 20 Sep   12 AM
53
53
Sat, 20 Sep   01 AM
52
53
Sat, 20 Sep   02 AM
51
53
Sat, 20 Sep   03 AM
49
52
Sat, 20 Sep   04 AM
48
51
Sat, 20 Sep   05 AM
46
50
Sat, 20 Sep   06 AM
44
49
Sat, 20 Sep   07 AM
43
48
Sat, 20 Sep   08 AM
42
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
Fri, 19 Sep  12 AM
0
0
Fri, 19 Sep  01 AM
0
0
Fri, 19 Sep  02 AM
0
0
Fri, 19 Sep  03 AM
0
0
Fri, 19 Sep  04 AM
0
0
Fri, 19 Sep  05 AM
0
0
Fri, 19 Sep  06 AM
0
0
Fri, 19 Sep  07 AM
0
0
Fri, 19 Sep  08 AM
0
0
Fri, 19 Sep  09 AM
0
0
Fri, 19 Sep  10 AM
0
0
Fri, 19 Sep  11 AM
0
0
Fri, 19 Sep  12 PM
0
0
Fri, 19 Sep  01 PM
0
0
Fri, 19 Sep  02 PM
0
0
Fri, 19 Sep  03 PM
0
0
Fri, 19 Sep  04 PM
0
0
Fri, 19 Sep  05 PM
0
0
Fri, 19 Sep  06 PM
0
0
Fri, 19 Sep  07 PM
0
0
Fri, 19 Sep  08 PM
0
0
Fri, 19 Sep  09 PM
0
0
Fri, 19 Sep  10 PM
0
0
Fri, 19 Sep  11 PM
0
0
Sat, 20 Sep  12 AM
0
0
Sat, 20 Sep  01 AM
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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