Skip Navigation Links weather.gov 
NOAA logo-Select to go to the NOAA homepage
National Oceanic and Atmospheric Administration's   
  Select to go to the NWS homepage
National Weather Service   
   

Air Quality Forecast Guidance for Catholic University, DC

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 38.93 N, longitude: 77.02 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 10/31, 4Z)
35
30
*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, 30 Oct  07 PM
8
28
Thu, 30 Oct   08 PM
6
25
Thu, 30 Oct   09 PM
7
22
Thu, 30 Oct   10 PM
8
19
Thu, 30 Oct   11 PM
10
15
Fri, 31 Oct   12 AM
12
13
Fri, 31 Oct   01 AM
14
10
Fri, 31 Oct   02 AM
15
10
Fri, 31 Oct   03 AM
15
11
Fri, 31 Oct   04 AM
12
12
Fri, 31 Oct   05 AM
9
12
Fri, 31 Oct   06 AM
6
12
Fri, 31 Oct   07 AM
2
11
Fri, 31 Oct   08 AM
0
9
Fri, 31 Oct   09 AM
2
8
Fri, 31 Oct   10 AM
9
7
Fri, 31 Oct   11 AM
22
8
Fri, 31 Oct   12 PM
29
10
Fri, 31 Oct   01 PM
31
12
Fri, 31 Oct   02 PM
32
16
Fri, 31 Oct   03 PM
34
20
Fri, 31 Oct   04 PM
34
24
Fri, 31 Oct   05 PM
32
28
Fri, 31 Oct   06 PM
20
29
Fri, 31 Oct   07 PM
6
27
Fri, 31 Oct   08 PM
4
24
Fri, 31 Oct   09 PM
3
20
Fri, 31 Oct   10 PM
2
17
Fri, 31 Oct   11 PM
2
13
Sat, 01 Nov   12 AM
2
9
Sat, 01 Nov   01 AM
2
5
Sat, 01 Nov   02 AM
2
3
Sat, 01 Nov   03 AM
6
3
Sat, 01 Nov   04 AM
15
4
Sat, 01 Nov   05 AM
16
6
Sat, 01 Nov   06 AM
14
8
Sat, 01 Nov   07 AM
13
9
Sat, 01 Nov   08 AM
15
10
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, 30 Oct  07 PM
0
0
Thu, 30 Oct  08 PM
0
0
Thu, 30 Oct  09 PM
0
0
Thu, 30 Oct  10 PM
0
0
Thu, 30 Oct  11 PM
0
0
Fri, 31 Oct  12 AM
0
0
Fri, 31 Oct  01 AM
0
0
Fri, 31 Oct  02 AM
0
0
Fri, 31 Oct  03 AM
0
0
Fri, 31 Oct  04 AM
0
0
Fri, 31 Oct  05 AM
0
0
Fri, 31 Oct  06 AM
0
0
Fri, 31 Oct  07 AM
0
0
Fri, 31 Oct  08 AM
0
0
Fri, 31 Oct  09 AM
0
0
Fri, 31 Oct  10 AM
0
0
Fri, 31 Oct  11 AM
0
0
Fri, 31 Oct  12 PM
0
0
Fri, 31 Oct  01 PM
0
0
Fri, 31 Oct  02 PM
0
0
Fri, 31 Oct  03 PM
0
0
Fri, 31 Oct  04 PM
0
0
Fri, 31 Oct  05 PM
0
0
Fri, 31 Oct  06 PM
0
0
Fri, 31 Oct  07 PM
0
0
Fri, 31 Oct  08 PM
0
0
Fri, 31 Oct  09 PM
0
0
Fri, 31 Oct  10 PM
0
0
Fri, 31 Oct  11 PM
0
0
Sat, 01 Nov  12 AM
0
0
Sat, 01 Nov  01 AM
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