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


Yosemite National Park

  • View from Turtleback Dome
    Looking Southwest
  • Air Data
    & Weather
  • NPS Air
    Webcams
updated 07/25/2014 11:00 AM DT
 View from Turtleback Dome, Looking Southwest
Ozone (O3) at Turtleback Dome Monitoring Site
updated 07/25/2014 11:00 AM DT

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average 49 ppb 55 ppb   56 ppb  
1-hour average 59 ppb 60 ppb   64 ppb  

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



AQI Ozone


Particulate Matter (PM2.5) at Yosemite Valley Visitor Center
updated 07/25/2014 11:00 AM DT

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average 6 μg/m3 4.5 μg/m3
1-hour average 1.0 μg/m3 29 μg/m3  18 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 07/25/2014 10:00 AM DT

Current temperature  71 F 
Yesterday's minimum temperature  60 F 
Yesterday's maximum temperature  79 F 
Current relative humidity  28 % 
Yesterday's minimum relative humidity  24 % 
Yesterday's maximum relative humidity  50 % 
Current wind speed  5 mph  
Current wind direction  SW 
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 07/25/2014 11:00 AM DT
Ozone concentration is ***O3*** parts per billion air quality index (AQI) for Ozone and Particulate Matter from good to unhealthy PM 2.5 is 1.0 micrograms per cubic meter
Particulate Matter - PM2.5
updated 07/25/2014 11:00 AM DT
  • See more air data »
  • Current Weather »
    updated 07/25/2014 10:00 AM DT
    Temperature
    71 F

    Humidity
    28 %

    Wind
    SW-5 mph

    Precipitation - 1 hr
    0 in.

  • See more weather data »
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    Last Updated: July 25, 2014