Air Quality Forecast Guidance for Portland, CT

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 41.56 N, longitude: 72.63 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 08/19, 4Z)
35
32
*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
Thu, 18 Aug  04 PM
35
29
Thu, 18 Aug  05 PM
34
31
Thu, 18 Aug  06 PM
31
32
Thu, 18 Aug  07 PM
27
31
Thu, 18 Aug   08 PM
27
31
Thu, 18 Aug   09 PM
25
30
Thu, 18 Aug   10 PM
22
29
Thu, 18 Aug   11 PM
19
28
Fri, 19 Aug   12 AM
19
25
Fri, 19 Aug   01 AM
14
23
Fri, 19 Aug   02 AM
12
21
Fri, 19 Aug   03 AM
11
19
Fri, 19 Aug   04 AM
7
16
Fri, 19 Aug   05 AM
5
14
Fri, 19 Aug   06 AM
4
11
Fri, 19 Aug   07 AM
5
10
Fri, 19 Aug   08 AM
8
8
Fri, 19 Aug   09 AM
17
9
Fri, 19 Aug   10 AM
25
10
Fri, 19 Aug   11 AM
35
13
Fri, 19 Aug   12 PM
38
17
Fri, 19 Aug   01 PM
38
21
Fri, 19 Aug   02 PM
41
26
Fri, 19 Aug   03 PM
46
31
Fri, 19 Aug   04 PM
53
37
Fri, 19 Aug   05 PM
59
42
Fri, 19 Aug   06 PM
63
47
Fri, 19 Aug   07 PM
68
51
Fri, 19 Aug   08 PM
68
54
Fri, 19 Aug   09 PM
55
57
Fri, 19 Aug   10 PM
48
57
Fri, 19 Aug   11 PM
42
57
Sat, 20 Aug   12 AM
36
55
Sat, 20 Aug   01 AM
27
51
Sat, 20 Aug   02 AM
23
46
Sat, 20 Aug   03 AM
20
40
Sat, 20 Aug   04 AM
16
33
Sat, 20 Aug   05 AM
14
28
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Thu, 18 Aug  04 PM
0
0
Thu, 18 Aug  05 PM
0
0
Thu, 18 Aug  06 PM
0
0
Thu, 18 Aug  07 PM
0
0
Thu, 18 Aug  08 PM
0
0
Thu, 18 Aug  09 PM
0
0
Thu, 18 Aug  10 PM
0
0
Thu, 18 Aug  11 PM
0
0
Fri, 19 Aug  12 AM
0
0
Fri, 19 Aug  01 AM
0
0
Fri, 19 Aug  02 AM
0
0
Fri, 19 Aug  03 AM
0
0
Fri, 19 Aug  04 AM
0
0
Fri, 19 Aug  05 AM
0
0
Fri, 19 Aug  06 AM
0
0
Fri, 19 Aug  07 AM
0
0
Fri, 19 Aug  08 AM
0
0
Fri, 19 Aug  09 AM
0
0
Fri, 19 Aug  10 AM
0
0
Fri, 19 Aug  11 AM
0
0
Fri, 19 Aug  12 PM
0
0
Fri, 19 Aug  01 PM
0
0
Fri, 19 Aug  02 PM
0
0
Fri, 19 Aug  03 PM
0
0
Fri, 19 Aug  04 PM
0
0
Fri, 19 Aug  05 PM
0
0
Fri, 19 Aug  06 PM
0
0
Fri, 19 Aug  07 PM
0
0
Fri, 19 Aug  08 PM
0
0
Fri, 19 Aug  09 PM
0
0

National Weather Service Air Quality Program Page
Environmental Protection Agency AirNow Forecast Page
Graphical Air Quality Forecast Guidance
FAQ


    US Dept of Commerce
    National Oceanic and Atmospheric Administration
    National Weather Service
    1325 East West Highway
    Silver Spring, MD 20910
    Page Author: NWS Internet Services Team
Disclaimer
Information Quality
Credits
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities