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 02/27/2015 02:30 PM PST
 View from Turtleback Dome, Looking Southwest
Ozone (O3) at Turtleback Dome Monitoring Site
updated 02/27/2015 02:00 PM PST

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average 36 ppb 40 ppb   41 ppb  
1-hour average 37 ppb 38 ppb   44 ppb  

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



AQI Ozone


Particulate Matter (PM2.5) at Yosemite Valley Visitor Center
updated 02/27/2015 02:00 PM PST

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average 6.3 μg/m3 8.4 μg/m3
1-hour average 1.0 μg/m3 11.0 μg/m3  29.0 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 02/27/2015 02:00 PM PST

Current temperature  41 F 
Yesterday's minimum temperature  40 F 
Yesterday's maximum temperature  50 F 
Current relative humidity  77 % 
Yesterday's minimum relative humidity  35 % 
Yesterday's maximum relative humidity  89 % 
Current wind speed  20 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 02/27/2015 02:00 PM PST
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 02/27/2015 02:00 PM PST
  • See more air data »
  • Current Weather »
    updated 02/27/2015 02:00 PM PST
    Temperature
    41 F

    Humidity
    77 %

    Wind
    SW-20 mph

    Precipitation - 1 hr
    0 in.

  • See more weather data »
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    Last Updated: February 27, 2015