Air Quality Forecast Guidance for St. Louis, MO

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 38.64 N, longitude: 90.23 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 04/21, 4Z)
40
37
*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
Tue, 20 Apr  03 PM
29
28
Tue, 20 Apr  04 PM
31
29
Tue, 20 Apr  05 PM
34
29
Tue, 20 Apr  06 PM
34
30
Tue, 20 Apr   07 PM
37
32
Tue, 20 Apr   08 PM
40
33
Tue, 20 Apr   09 PM
40
34
Tue, 20 Apr   10 PM
35
35
Tue, 20 Apr   11 PM
36
36
Wed, 21 Apr   12 AM
37
37
Wed, 21 Apr   01 AM
38
37
Wed, 21 Apr   02 AM
30
37
Wed, 21 Apr   03 AM
26
35
Wed, 21 Apr   04 AM
28
34
Wed, 21 Apr   05 AM
27
32
Wed, 21 Apr   06 AM
25
31
Wed, 21 Apr   07 AM
20
29
Wed, 21 Apr   08 AM
22
27
Wed, 21 Apr   09 AM
28
26
Wed, 21 Apr   10 AM
30
26
Wed, 21 Apr   11 AM
36
27
Wed, 21 Apr   12 PM
40
28
Wed, 21 Apr   01 PM
45
31
Wed, 21 Apr   02 PM
50
34
Wed, 21 Apr   03 PM
55
38
Wed, 21 Apr   04 PM
56
42
Wed, 21 Apr   05 PM
55
46
Wed, 21 Apr   06 PM
52
49
Wed, 21 Apr   07 PM
49
50
Wed, 21 Apr   08 PM
43
51
Wed, 21 Apr   09 PM
43
50
Wed, 21 Apr   10 PM
43
49
Wed, 21 Apr   11 PM
44
48
Thu, 22 Apr   12 AM
33
45
Thu, 22 Apr   01 AM
28
42
Thu, 22 Apr   02 AM
25
38
Thu, 22 Apr   03 AM
21
35
Thu, 22 Apr   04 AM
22
32
Thu, 22 Apr   05 AM
21
30
Thu, 22 Apr   06 AM
19
27
Thu, 22 Apr   07 AM
15
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
Tue, 20 Apr  02 PM
0
0
Tue, 20 Apr  03 PM
0
0
Tue, 20 Apr  04 PM
0
0
Tue, 20 Apr  05 PM
0
0
Tue, 20 Apr  06 PM
0
0
Tue, 20 Apr  07 PM
0
0
Tue, 20 Apr  08 PM
0
0
Tue, 20 Apr  09 PM
0
0
Tue, 20 Apr  10 PM
0
0
Tue, 20 Apr  11 PM
0
0
Wed, 21 Apr  12 AM
0
0
Wed, 21 Apr  01 AM
0
0
Wed, 21 Apr  02 AM
0
0
Wed, 21 Apr  03 AM
0
0
Wed, 21 Apr  04 AM
0
0
Wed, 21 Apr  05 AM
0
0
Wed, 21 Apr  06 AM
0
0
Wed, 21 Apr  07 AM
0
0
Wed, 21 Apr  08 AM
0
0
Wed, 21 Apr  09 AM
0
0
Wed, 21 Apr  10 AM
0
0
Wed, 21 Apr  11 AM
0
0
Wed, 21 Apr  12 PM
0
0
Wed, 21 Apr  01 PM
0
0
Wed, 21 Apr  02 PM
0
0
Wed, 21 Apr  03 PM
0
0
Wed, 21 Apr  04 PM
0
0
Wed, 21 Apr  05 PM
0
0
Wed, 21 Apr  06 PM
0
0
Wed, 21 Apr  07 PM
0
0
Wed, 21 Apr  08 PM
0
0
Wed, 21 Apr  09 PM
0
0
Wed, 21 Apr  10 PM
0
0
Wed, 21 Apr  11 PM
0
0
Thu, 22 Apr  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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