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 08/31, 4Z)
49
47
*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
Sun, 30 Aug  06 PM
48
46
Sun, 30 Aug  07 PM
45
47
Sun, 30 Aug   08 PM
38
46
Sun, 30 Aug   09 PM
34
45
Sun, 30 Aug   10 PM
31
42
Sun, 30 Aug   11 PM
29
40
Mon, 31 Aug   12 AM
28
38
Mon, 31 Aug   01 AM
27
35
Mon, 31 Aug   02 AM
26
32
Mon, 31 Aug   03 AM
25
30
Mon, 31 Aug   04 AM
24
28
Mon, 31 Aug   05 AM
24
27
Mon, 31 Aug   06 AM
25
26
Mon, 31 Aug   07 AM
25
26
Mon, 31 Aug   08 AM
25
25
Mon, 31 Aug   09 AM
26
25
Mon, 31 Aug   10 AM
25
25
Mon, 31 Aug   11 AM
26
25
Mon, 31 Aug   12 PM
29
26
Mon, 31 Aug   01 PM
28
26
Mon, 31 Aug   02 PM
28
26
Mon, 31 Aug   03 PM
27
27
Mon, 31 Aug   04 PM
28
27
Mon, 31 Aug   05 PM
30
28
Mon, 31 Aug   06 PM
31
28
Mon, 31 Aug   07 PM
29
29
Mon, 31 Aug   08 PM
28
29
Mon, 31 Aug   09 PM
27
28
Mon, 31 Aug   10 PM
28
28
Mon, 31 Aug   11 PM
26
28
Tue, 01 Sep   12 AM
26
28
Tue, 01 Sep   01 AM
26
28
Tue, 01 Sep   02 AM
26
27
Tue, 01 Sep   03 AM
25
26
Tue, 01 Sep   04 AM
23
26
Tue, 01 Sep   05 AM
22
25
Tue, 01 Sep   06 AM
22
24
Tue, 01 Sep   07 AM
23
24
Tue, 01 Sep   08 AM
24
24
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Sun, 30 Aug  06 PM
0
0
Sun, 30 Aug  07 PM
0
0
Sun, 30 Aug  08 PM
0
0
Sun, 30 Aug  09 PM
0
0
Sun, 30 Aug  10 PM
0
0
Sun, 30 Aug  11 PM
0
0
Mon, 31 Aug  12 AM
0
0
Mon, 31 Aug  01 AM
0
0
Mon, 31 Aug  02 AM
0
0
Mon, 31 Aug  03 AM
0
0
Mon, 31 Aug  04 AM
0
0
Mon, 31 Aug  05 AM
0
0
Mon, 31 Aug  06 AM
0
0
Mon, 31 Aug  07 AM
0
0
Mon, 31 Aug  08 AM
0
0
Mon, 31 Aug  09 AM
0
0
Mon, 31 Aug  10 AM
0
0
Mon, 31 Aug  11 AM
0
0
Mon, 31 Aug  12 PM
0
0
Mon, 31 Aug  01 PM
0
0
Mon, 31 Aug  02 PM
0
0
Mon, 31 Aug  03 PM
0
0
Mon, 31 Aug  04 PM
0
0
Mon, 31 Aug  05 PM
0
0
Mon, 31 Aug  06 PM
0
0
Mon, 31 Aug  07 PM
0
0
Mon, 31 Aug  08 PM
0
0
Mon, 31 Aug  09 PM
0
0
Mon, 31 Aug  10 PM
0
0
Mon, 31 Aug  11 PM
0
0
Tue, 01 Sep  12 AM
0
0
Tue, 01 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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