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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 01/31, 4Z)
38
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)

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

12Z Model Run
Fri, 30 Jan  03 PM
34
29
Fri, 30 Jan  04 PM
35
30
Fri, 30 Jan  05 PM
35
31
Fri, 30 Jan  06 PM
33
32
Fri, 30 Jan   07 PM
32
33
Fri, 30 Jan   08 PM
33
33
Fri, 30 Jan   09 PM
34
34
Fri, 30 Jan   10 PM
34
34
Fri, 30 Jan   11 PM
33
34
Sat, 31 Jan   12 AM
33
33
Sat, 31 Jan   01 AM
32
33
Sat, 31 Jan   02 AM
31
33
Sat, 31 Jan   03 AM
30
32
Sat, 31 Jan   04 AM
30
32
Sat, 31 Jan   05 AM
29
31
Sat, 31 Jan   06 AM
29
31
Sat, 31 Jan   07 AM
28
30
Sat, 31 Jan   08 AM
28
30
Sat, 31 Jan   09 AM
29
29
Sat, 31 Jan   10 AM
30
29
Sat, 31 Jan   11 AM
32
29
Sat, 31 Jan   12 PM
33
30
Sat, 31 Jan   01 PM
34
30
Sat, 31 Jan   02 PM
35
31
Sat, 31 Jan   03 PM
36
32
Sat, 31 Jan   04 PM
36
33
Sat, 31 Jan   05 PM
35
34
Sat, 31 Jan   06 PM
32
34
Sat, 31 Jan   07 PM
29
34
Sat, 31 Jan   08 PM
26
33
Sat, 31 Jan   09 PM
25
32
Sat, 31 Jan   10 PM
24
30
Sat, 31 Jan   11 PM
23
29
Sun, 01 Feb   12 AM
23
27
Sun, 01 Feb   01 AM
23
26
Sun, 01 Feb   02 AM
24
24
Sun, 01 Feb   03 AM
24
24
Sun, 01 Feb   04 AM
23
23
Sun, 01 Feb   05 AM
22
23
Sun, 01 Feb   06 AM
22
23
Sun, 01 Feb   07 AM
21
23
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, 30 Jan  01 PM
0
0
Fri, 30 Jan  02 PM
0
0
Fri, 30 Jan  03 PM
0
0
Fri, 30 Jan  04 PM
0
0
Fri, 30 Jan  05 PM
0
0
Fri, 30 Jan  06 PM
0
0
Fri, 30 Jan  07 PM
0
0
Fri, 30 Jan  08 PM
0
0
Fri, 30 Jan  09 PM
0
0
Fri, 30 Jan  10 PM
0
0
Fri, 30 Jan  11 PM
0
0
Sat, 31 Jan  12 AM
0
0
Sat, 31 Jan  01 AM
0
0
Sat, 31 Jan  02 AM
0
0
Sat, 31 Jan  03 AM
0
0
Sat, 31 Jan  04 AM
0
0
Sat, 31 Jan  05 AM
0
0
Sat, 31 Jan  06 AM
0
0
Sat, 31 Jan  07 AM
0
0
Sat, 31 Jan  08 AM
0
0
Sat, 31 Jan  09 AM
0
0
Sat, 31 Jan  10 AM
0
0
Sat, 31 Jan  11 AM
0
0
Sat, 31 Jan  12 PM
0
0
Sat, 31 Jan  01 PM
0
0
Sat, 31 Jan  02 PM
0
0
Sat, 31 Jan  03 PM
0
0
Sat, 31 Jan  04 PM
0
0
Sat, 31 Jan  05 PM
0
0
Sat, 31 Jan  06 PM
0
0
Sat, 31 Jan  07 PM
0
0
Sat, 31 Jan  08 PM
0
0
Sat, 31 Jan  09 PM
0
0
Sat, 31 Jan  10 PM
0
0
Sat, 31 Jan  11 PM
0
0
Sun, 01 Feb  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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