National Park Service

Air Resources






For more information about National Park Service air resources, please visit http://www.nature.nps.gov/air/.

NPS » Explore Nature » Air Resources

Yosemite National Park

  • View from Turtleback Dome
    Looking Southwest
  • Air Data
    & Weather
  • NPS Air
    Webcams
updated 05/20/2013 05:00 AM PDT
View from Turtleback Dome, Looking Southwest
Ozone (O3) at Turtleback Dome Monitoring Site
updated 05/20/2013 04:00 AM PDT

O3 concentration Current Today's
Maximum		 Yesterday's
Maximum
8-hour average 50 ppb 50 ppb   55 ppb  
1-hour average 51 ppb 53 ppb   60 ppb  

*Ozone (O3) is measured in parts per billion (ppb)



AQI Ozone


Particulate Matter (PM2.5) at Yosemite Valley Visitor Center
updated 05/20/2013 05:00 AM PDT

PM2.5 concentration
Current Today's
Maximum		 Yesterday's
Maximum
24-hour average 9.4 μg/m3 — 9.2 μg/m3
1-hour average 4.0 μg/m3 18 μg/m3  53 μg/m3

*Particulate Matter (PM2.5) is measured in micrograms per cubic meter (μg/m3)



Particulate Matter (PM2.5)


Weather at Turtleback Dome Monitoring Site
updated 05/20/2013 03:00 AM PDT

Current temperature  55 F 
Yesterday's minimum temperature  46 F 
Yesterday's maximum temperature  65 F 
Current relative humidity  35 % 
Yesterday's minimum relative humidity  27 % 
Yesterday's maximum relative humidity  54 % 
Current wind speed  11 mph  
Current wind direction  ENE 
Precipitation in last hour  0.00 in. 
Precipitation since midnight  0.00 in. 
Yesterday's precipitation  0.00 in. 

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Current Air Quality »
Ozone - O3
updated 05/20/2013 04:00 AM PDT
Ozone concentration is ***O3*** parts per billion air quality index (AQI) for Ozone and Particulate Matter from good to unhealthy PM 2.5 is 4.0 micrograms per cubic meter
Particulate Matter - PM2.5
updated 05/20/2013 05:00 AM PDT
  • See more air data »
    • Current Weather »
    updated 05/20/2013 03:00 AM PDT
    Temperature
    55 F

    Humidity
    35 %

    Wind
    ENE-11 mph

    Precipitation - 1 hr
    0 in.

  • See more weather data »
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    Last Updated: May 20, 2013