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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 12/20, 4Z)
39
36
*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
Fri, 19 Dec  11 AM
27
23
Fri, 19 Dec  12 PM
32
24
Fri, 19 Dec  01 PM
35
25
Fri, 19 Dec  02 PM
38
27
Fri, 19 Dec  03 PM
39
29
Fri, 19 Dec  04 PM
39
32
Fri, 19 Dec  05 PM
37
34
Fri, 19 Dec  06 PM
34
35
Fri, 19 Dec   07 PM
32
36
Fri, 19 Dec   08 PM
30
36
Fri, 19 Dec   09 PM
29
35
Fri, 19 Dec   10 PM
29
34
Fri, 19 Dec   11 PM
30
33
Sat, 20 Dec   12 AM
30
32
Sat, 20 Dec   01 AM
30
30
Sat, 20 Dec   02 AM
30
30
Sat, 20 Dec   03 AM
30
30
Sat, 20 Dec   04 AM
30
30
Sat, 20 Dec   05 AM
28
29
Sat, 20 Dec   06 AM
27
29
Sat, 20 Dec   07 AM
27
29
Sat, 20 Dec   08 AM
27
28
Sat, 20 Dec   09 AM
28
28
Sat, 20 Dec   10 AM
29
28
Sat, 20 Dec   11 AM
31
28
Sat, 20 Dec   12 PM
33
29
Sat, 20 Dec   01 PM
36
30
Sat, 20 Dec   02 PM
36
31
Sat, 20 Dec   03 PM
37
32
Sat, 20 Dec   04 PM
37
33
Sat, 20 Dec   05 PM
36
34
Sat, 20 Dec   06 PM
34
35
Sat, 20 Dec   07 PM
33
35
Sat, 20 Dec   08 PM
31
35
Sat, 20 Dec   09 PM
30
34
Sat, 20 Dec   10 PM
29
33
Sat, 20 Dec   11 PM
28
32
Sun, 21 Dec   12 AM
26
31
Sun, 21 Dec   01 AM
24
29
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 Dec  11 AM
0
0
Fri, 19 Dec  12 PM
0
0
Fri, 19 Dec  01 PM
0
0
Fri, 19 Dec  02 PM
0
0
Fri, 19 Dec  03 PM
0
0
Fri, 19 Dec  04 PM
0
0
Fri, 19 Dec  05 PM
0
0
Fri, 19 Dec  06 PM
0
0
Fri, 19 Dec  07 PM
0
0
Fri, 19 Dec  08 PM
0
0
Fri, 19 Dec  09 PM
0
0
Fri, 19 Dec  10 PM
0
0
Fri, 19 Dec  11 PM
0
0
Sat, 20 Dec  12 AM
0
0
Sat, 20 Dec  01 AM
0
0
Sat, 20 Dec  02 AM
0
0
Sat, 20 Dec  03 AM
0
0
Sat, 20 Dec  04 AM
0
0
Sat, 20 Dec  05 AM
0
0
Sat, 20 Dec  06 AM
0
0
Sat, 20 Dec  07 AM
0
0
Sat, 20 Dec  08 AM
0
0
Sat, 20 Dec  09 AM
0
0
Sat, 20 Dec  10 AM
0
0
Sat, 20 Dec  11 AM
0
0
Sat, 20 Dec  12 PM
0
0
Sat, 20 Dec  01 PM
0
0
Sat, 20 Dec  02 PM
0
0
Sat, 20 Dec  03 PM
0
0
Sat, 20 Dec  04 PM
0
0
Sat, 20 Dec  05 PM
0
0
Sat, 20 Dec  06 PM
0
0
Sat, 20 Dec  07 PM
0
0
Sat, 20 Dec  08 PM
0
0
Sat, 20 Dec  09 PM
0
0
Sat, 20 Dec  10 PM
0
0
Sat, 20 Dec  11 PM
0
0
Sun, 21 Dec  12 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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