Air Quality Forecast Guidance for Ohare Airport, IL

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 41.98 N, longitude: 87.91 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 02/24, 4Z)
24
24
*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
Fri, 23 Feb  10 AM
14
8
Fri, 23 Feb  11 AM
20
9
Fri, 23 Feb  12 PM
23
11
Fri, 23 Feb  01 PM
23
12
Fri, 23 Feb  02 PM
24
15
Fri, 23 Feb  03 PM
24
17
Fri, 23 Feb  04 PM
24
20
Fri, 23 Feb  05 PM
19
21
Fri, 23 Feb   06 PM
8
21
Fri, 23 Feb   07 PM
7
19
Fri, 23 Feb   08 PM
14
18
Fri, 23 Feb   09 PM
17
17
Fri, 23 Feb   10 PM
18
16
Fri, 23 Feb   11 PM
20
16
Sat, 24 Feb   12 AM
21
16
Sat, 24 Feb   01 AM
22
16
Sat, 24 Feb   02 AM
23
18
Sat, 24 Feb   03 AM
26
20
Sat, 24 Feb   04 AM
30
22
Sat, 24 Feb   05 AM
36
24
Sat, 24 Feb   06 AM
39
27
Sat, 24 Feb   07 AM
37
29
Sat, 24 Feb   08 AM
33
31
Sat, 24 Feb   09 AM
32
32
Sat, 24 Feb   10 AM
31
33
Sat, 24 Feb   11 AM
29
33
Sat, 24 Feb   12 PM
30
33
Sat, 24 Feb   01 PM
31
33
Sat, 24 Feb   02 PM
27
31
Sat, 24 Feb   03 PM
25
30
Sat, 24 Feb   04 PM
25
29
Sat, 24 Feb   05 PM
27
28
Sat, 24 Feb   06 PM
23
27
Sat, 24 Feb   07 PM
17
26
Sat, 24 Feb   08 PM
10
23
Sat, 24 Feb   09 PM
6
20
Sat, 24 Feb   10 PM
4
17
Sat, 24 Feb   11 PM
5
15
Sun, 25 Feb   12 AM
10
13
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, 23 Feb  10 AM
0
0
Fri, 23 Feb  11 AM
0
0
Fri, 23 Feb  12 PM
0
0
Fri, 23 Feb  01 PM
0
0
Fri, 23 Feb  02 PM
0
0
Fri, 23 Feb  03 PM
0
0
Fri, 23 Feb  04 PM
0
0
Fri, 23 Feb  05 PM
0
0
Fri, 23 Feb  06 PM
0
0
Fri, 23 Feb  07 PM
0
0
Fri, 23 Feb  08 PM
0
0
Fri, 23 Feb  09 PM
0
0
Fri, 23 Feb  10 PM
0
0
Fri, 23 Feb  11 PM
0
0
Sat, 24 Feb  12 AM
0
0
Sat, 24 Feb  01 AM
0
0
Sat, 24 Feb  02 AM
0
0
Sat, 24 Feb  03 AM
0
0
Sat, 24 Feb  04 AM
0
0
Sat, 24 Feb  05 AM
0
0
Sat, 24 Feb  06 AM
0
0
Sat, 24 Feb  07 AM
0
0
Sat, 24 Feb  08 AM
0
0
Sat, 24 Feb  09 AM
0
0
Sat, 24 Feb  10 AM
0
0
Sat, 24 Feb  11 AM
0
0
Sat, 24 Feb  12 PM
0
0
Sat, 24 Feb  01 PM
0
0
Sat, 24 Feb  02 PM
0
0
Sat, 24 Feb  03 PM
0
0
Sat, 24 Feb  04 PM
0
0
Sat, 24 Feb  05 PM
0
0
Sat, 24 Feb  06 PM
0
0
Sat, 24 Feb  07 PM
0
0
Sat, 24 Feb  08 PM
0
0
Sat, 24 Feb  09 PM
0
0
Sat, 24 Feb  10 PM
0
0
Sat, 24 Feb  11 PM
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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