National Park Service Arrowhead
Explore Air

Current Ozone and Weather Data in National Parks


Joshua Tree National Park - Cottonwood Canyon, CA
EPA AQS Site Number:


Today's Data   Data Timelines   Ozone Health Advisory  
Ozone Saturday January 21, 2017 
Hour Ending
(Local Time)
1-Hour Average
(parts per billion)
8-Hour Average
(parts per billion)
12 AM 43 44
1 AM 43 44
2 AM 42 44
3 AM 45 45
4 AM 45 45
5 AM 45 45
6 AM 45 45
7 AM 45 45
8 AM 45 45
9 AM 45 46
10 AM -- 46
11 AM 45 46
12 PM 46 46
1 PM 46 45
2 PM 47 45
3 PM 47 45
4 PM 47 44
5 PM 47 44
6 PM 45 43
7 PM 43 42
8 PM 44 42
9 PM 45 41
10 PM 43 41
11 PM 43 41
Weather and Ozone Data Saturday January 21, 2017
Hour
Ending
(Local Time)
Ozone
(parts per
billion)
Wind
Speed
(meters per
second)
Wind
Direction
Temperature
(degrees C)
Relative
Humidity
(%)
Solar
Radiation
(watts per
meter
squared)
Rainfall
(millimeters)
12 AM 43 1.6 W 4.9 86 0 0.0
1 AM 43 1.9 SW 4.9 86 0 0.0
2 AM 42 2.8 W 4.5 87 0 0.0
3 AM 45 4.3 SW 4.8 77 0 0.0
4 AM 45 4.1 SW 4.4 72 0 0.0
5 AM 45 4.3 SW 4.0 71 0 0.0
6 AM 45 4.7 SW 3.9 73 0 0.0
7 AM 45 4.9 W 4.1 71 2 0.0
8 AM 45 5.5 W 5.1 63 104 0.0
9 AM 45 5.9 W 6.3 54 272 0.0
10 AM -- 4.4 W 7.8 48 412 0.0
11 AM 45 5.8 W 8.2 50 510 0.0
12 PM 46 6.9 W 9.3 46 564 0.0
1 PM 46 4.8 W 10.0 45 557 0.0
2 PM 47 3.6 SW 10.2 45 479 0.0
3 PM 47 5.2 SW 9.9 46 386 0.0
4 PM 47 4.1 SW 9.8 46 114 0.0
5 PM 47 2.8 SW 9.1 47 17 0.0
6 PM 45 1.9 S 8.2 50 1 0.0
7 PM 43 1.4 E 7.6 51 0 0.0
8 PM 44 2.0 NW 7.4 51 0 0.0
9 PM 45 0.9 SW 7.6 53 0 0.0
10 PM 43 1.2 SW 7.5 55 0 0.0
11 PM 43 1.4 S 7.5 54 0 0.0
U.S. Department of the Interior Accessibility Freedom of Information Act USA.gov Search
Privacy Policy Disclaimer NPS Home Contact Us
updated on 01/22/2017 5:41 AM  I   http://www.nature.nps.gov/air/data/current/data_JOTR-CC2.cfm   I  Email: Webmaster