Air Quality Forecast Guidance for St. Louis, MO

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 38.64 N, longitude: 90.24 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 08/20, 4Z)
73
59
*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
Sat, 19 Aug  11 AM
52
29
Sat, 19 Aug  12 PM
66
35
Sat, 19 Aug  01 PM
73
41
Sat, 19 Aug  02 PM
67
46
Sat, 19 Aug  03 PM
59
51
Sat, 19 Aug  04 PM
53
55
Sat, 19 Aug  05 PM
52
58
Sat, 19 Aug  06 PM
50
59
Sat, 19 Aug   07 PM
43
58
Sat, 19 Aug   08 PM
28
53
Sat, 19 Aug   09 PM
19
46
Sat, 19 Aug   10 PM
16
40
Sat, 19 Aug   11 PM
15
35
Sun, 20 Aug   12 AM
18
30
Sun, 20 Aug   01 AM
20
26
Sun, 20 Aug   02 AM
21
23
Sun, 20 Aug   03 AM
20
20
Sun, 20 Aug   04 AM
19
19
Sun, 20 Aug   05 AM
16
18
Sun, 20 Aug   06 AM
12
18
Sun, 20 Aug   07 AM
7
17
Sun, 20 Aug   08 AM
12
16
Sun, 20 Aug   09 AM
27
17
Sun, 20 Aug   10 AM
44
20
Sun, 20 Aug   11 AM
62
25
Sun, 20 Aug   12 PM
70
31
Sun, 20 Aug   01 PM
73
38
Sun, 20 Aug   02 PM
74
46
Sun, 20 Aug   03 PM
76
55
Sun, 20 Aug   04 PM
77
63
Sun, 20 Aug   05 PM
78
69
Sun, 20 Aug   06 PM
75
73
Sun, 20 Aug   07 PM
61
73
Sun, 20 Aug   08 PM
41
70
Sun, 20 Aug   09 PM
31
64
Sun, 20 Aug   10 PM
28
58
Sun, 20 Aug   11 PM
33
53
Mon, 21 Aug   12 AM
45
49
Mon, 21 Aug   01 AM
48
45
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Sat, 19 Aug  11 AM
0
1
Sat, 19 Aug  12 PM
0
0
Sat, 19 Aug  01 PM
0
1
Sat, 19 Aug  02 PM
0
0
Sat, 19 Aug  03 PM
0
1
Sat, 19 Aug  04 PM
0
1
Sat, 19 Aug  05 PM
0
1
Sat, 19 Aug  06 PM
0
2
Sat, 19 Aug  07 PM
0
0
Sat, 19 Aug  08 PM
0
0
Sat, 19 Aug  09 PM
0
0
Sat, 19 Aug  10 PM
0
0
Sat, 19 Aug  11 PM
0
0
Sun, 20 Aug  12 AM
0
0
Sun, 20 Aug  01 AM
0
0
Sun, 20 Aug  02 AM
0
0
Sun, 20 Aug  03 AM
0
0
Sun, 20 Aug  04 AM
0
0
Sun, 20 Aug  05 AM
0
0
Sun, 20 Aug  06 AM
0
0
Sun, 20 Aug  07 AM
0
0
Sun, 20 Aug  08 AM
0
0
Sun, 20 Aug  09 AM
0
0
Sun, 20 Aug  10 AM
0
0
Sun, 20 Aug  11 AM
0
0
Sun, 20 Aug  12 PM
0
0
Sun, 20 Aug  01 PM
0
0
Sun, 20 Aug  02 PM
0
0
Sun, 20 Aug  03 PM
0
0
Sun, 20 Aug  04 PM
0
1
Sun, 20 Aug  05 PM
0
1
Sun, 20 Aug  06 PM
0
2
Sun, 20 Aug  07 PM
0
1
Sun, 20 Aug  08 PM
0
1
Sun, 20 Aug  09 PM
0
1
Sun, 20 Aug  10 PM
0
0
Sun, 20 Aug  11 PM
0
0
Mon, 21 Aug  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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