Air Quality Forecast Guidance for Ohare Airport, IL

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 41.98 N, longitude: 87.90 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 06/25, 4Z)
83
75
*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, 24 Jun  04 PM
83
62
Fri, 24 Jun  05 PM
83
69
Fri, 24 Jun  06 PM
80
73
Fri, 24 Jun   07 PM
75
75
Fri, 24 Jun   08 PM
60
75
Fri, 24 Jun   09 PM
28
70
Fri, 24 Jun   10 PM
17
63
Fri, 24 Jun   11 PM
10
54
Sat, 25 Jun   12 AM
11
45
Sat, 25 Jun   01 AM
15
37
Sat, 25 Jun   02 AM
23
30
Sat, 25 Jun   03 AM
30
24
Sat, 25 Jun   04 AM
34
21
Sat, 25 Jun   05 AM
34
22
Sat, 25 Jun   06 AM
31
24
Sat, 25 Jun   07 AM
33
26
Sat, 25 Jun   08 AM
43
30
Sat, 25 Jun   09 AM
48
35
Sat, 25 Jun   10 AM
53
38
Sat, 25 Jun   11 AM
56
41
Sat, 25 Jun   12 PM
59
45
Sat, 25 Jun   01 PM
61
48
Sat, 25 Jun   02 PM
63
52
Sat, 25 Jun   03 PM
68
56
Sat, 25 Jun   04 PM
69
60
Sat, 25 Jun   05 PM
70
62
Sat, 25 Jun   06 PM
68
64
Sat, 25 Jun   07 PM
66
66
Sat, 25 Jun   08 PM
63
66
Sat, 25 Jun   09 PM
55
65
Sat, 25 Jun   10 PM
47
63
Sat, 25 Jun   11 PM
41
60
Sun, 26 Jun   12 AM
42
56
Sun, 26 Jun   01 AM
43
53
Sun, 26 Jun   02 AM
40
50
Sun, 26 Jun   03 AM
39
46
Sun, 26 Jun   04 AM
40
43
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, 24 Jun  04 PM
0
0
Fri, 24 Jun  05 PM
0
0
Fri, 24 Jun  06 PM
0
0
Fri, 24 Jun  07 PM
0
0
Fri, 24 Jun  08 PM
0
0
Fri, 24 Jun  09 PM
0
0
Fri, 24 Jun  10 PM
0
0
Fri, 24 Jun  11 PM
0
0
Sat, 25 Jun  12 AM
0
0
Sat, 25 Jun  01 AM
0
0
Sat, 25 Jun  02 AM
0
0
Sat, 25 Jun  03 AM
0
0
Sat, 25 Jun  04 AM
0
0
Sat, 25 Jun  05 AM
0
0
Sat, 25 Jun  06 AM
0
0
Sat, 25 Jun  07 AM
0
0
Sat, 25 Jun  08 AM
0
0
Sat, 25 Jun  09 AM
0
0
Sat, 25 Jun  10 AM
0
0
Sat, 25 Jun  11 AM
0
0
Sat, 25 Jun  12 PM
0
0
Sat, 25 Jun  01 PM
0
0
Sat, 25 Jun  02 PM
0
0
Sat, 25 Jun  03 PM
0
0
Sat, 25 Jun  04 PM
0
0
Sat, 25 Jun  05 PM
0
0
Sat, 25 Jun  06 PM
0
0
Sat, 25 Jun  07 PM
0
0
Sat, 25 Jun  08 PM
0
0
Sat, 25 Jun  09 PM
0
0
Sat, 25 Jun  10 PM
0
0
Sat, 25 Jun  11 PM
0
0
Sun, 26 Jun  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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