Air Quality Forecast Guidance for Lewistown, MT

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 47.06 N, longitude: 109.43 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 09/19, 4Z)
48
45
*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
Thu, 18 Sep  08 AM
38
38
Thu, 18 Sep  09 AM
36
38
Thu, 18 Sep  10 AM
38
38
Thu, 18 Sep  11 AM
39
38
Thu, 18 Sep  12 PM
44
39
Thu, 18 Sep  01 PM
48
40
Thu, 18 Sep  02 PM
48
41
Thu, 18 Sep  03 PM
48
42
Thu, 18 Sep  04 PM
46
44
Thu, 18 Sep  05 PM
46
45
Thu, 18 Sep   06 PM
43
45
Thu, 18 Sep   07 PM
39
45
Thu, 18 Sep   08 PM
36
44
Thu, 18 Sep   09 PM
35
43
Thu, 18 Sep   10 PM
36
41
Thu, 18 Sep   11 PM
36
40
Fri, 19 Sep   12 AM
36
38
Fri, 19 Sep   01 AM
35
37
Fri, 19 Sep   02 AM
36
36
Fri, 19 Sep   03 AM
36
36
Fri, 19 Sep   04 AM
36
36
Fri, 19 Sep   05 AM
35
36
Fri, 19 Sep   06 AM
35
36
Fri, 19 Sep   07 AM
35
36
Fri, 19 Sep   08 AM
36
35
Fri, 19 Sep   09 AM
37
36
Fri, 19 Sep   10 AM
40
36
Fri, 19 Sep   11 AM
43
37
Fri, 19 Sep   12 PM
43
38
Fri, 19 Sep   01 PM
43
39
Fri, 19 Sep   02 PM
43
40
Fri, 19 Sep   03 PM
42
41
Fri, 19 Sep   04 PM
42
42
Fri, 19 Sep   05 PM
42
42
Fri, 19 Sep   06 PM
41
42
Fri, 19 Sep   07 PM
40
42
Fri, 19 Sep   08 PM
36
41
Fri, 19 Sep   09 PM
34
40
Fri, 19 Sep   10 PM
34
39
Fri, 19 Sep   11 PM
33
38
Sat, 20 Sep   12 AM
32
36
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 Sep  07 AM
0
2
Thu, 18 Sep  08 AM
1
3
Thu, 18 Sep  09 AM
0
4
Thu, 18 Sep  10 AM
0
3
Thu, 18 Sep  11 AM
0
2
Thu, 18 Sep  12 PM
0
2
Thu, 18 Sep  01 PM
0
2
Thu, 18 Sep  02 PM
0
1
Thu, 18 Sep  03 PM
0
1
Thu, 18 Sep  04 PM
0
2
Thu, 18 Sep  05 PM
0
3
Thu, 18 Sep  06 PM
0
1
Thu, 18 Sep  07 PM
0
1
Thu, 18 Sep  08 PM
0
1
Thu, 18 Sep  09 PM
0
1
Thu, 18 Sep  10 PM
0
3
Thu, 18 Sep  11 PM
0
2
Fri, 19 Sep  12 AM
0
2
Fri, 19 Sep  01 AM
0
1
Fri, 19 Sep  02 AM
1
1
Fri, 19 Sep  03 AM
2
1
Fri, 19 Sep  04 AM
1
1
Fri, 19 Sep  05 AM
0
1
Fri, 19 Sep  06 AM
0
1
Fri, 19 Sep  07 AM
0
1
Fri, 19 Sep  08 AM
0
1
Fri, 19 Sep  09 AM
0
0
Fri, 19 Sep  10 AM
0
0
Fri, 19 Sep  11 AM
0
0
Fri, 19 Sep  12 PM
4
0
Fri, 19 Sep  01 PM
2
0
Fri, 19 Sep  02 PM
0
0
Fri, 19 Sep  03 PM
0
0
Fri, 19 Sep  04 PM
0
0
Fri, 19 Sep  05 PM
0
0
Fri, 19 Sep  06 PM
0
0
Fri, 19 Sep  07 PM
0
0
Fri, 19 Sep  08 PM
0
0
Fri, 19 Sep  09 PM
0
0
Fri, 19 Sep  10 PM
0
0
Fri, 19 Sep  11 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