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


Yosemite National Park

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Ozone (O3) at Turtleback Dome Monitoring Site
updated 10/31/2014 12:00 AM ST

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average unavailable 50 ppb   50 ppb  
1-hour average 51 ppb unavailable  52 ppb  

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



AQI Ozone


Particulate Matter (PM2.5) at Yosemite Valley Visitor Center
updated 10/31/2014 01:00 AM ST

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average unavailable 7.7 μg/m3
1-hour average 8.0 μg/m3 8 μg/m3  32 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

Current temperature  56 F 
Yesterday's minimum temperature  54 F 
Yesterday's maximum temperature  68 F 
Current relative humidity  29 % 
Yesterday's minimum relative humidity  20 % 
Yesterday's maximum relative humidity  29 % 
Current wind speed  2 mph  
Current wind direction  NNW 
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 10/31/2014 12:00 AM ST
Ozone concentration is ***O3*** parts per billion air quality index (AQI) for Ozone and Particulate Matter from good to unhealthy PM 2.5 is 8.0 micrograms per cubic meter
Particulate Matter - PM2.5
updated 10/31/2014 01:00 AM ST
  • See more air data »
  • Current Weather »

    Temperature
    56 F

    Humidity
    29 %

    Wind
    NNW-2 mph

    Precipitation - 1 hr
    0 in.

  • See more weather data »
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    Last Updated: October 31, 2014