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 09/20/2014 10:15 PM PDT
 View from Turtleback Dome, Looking Southwest
Ozone (O3) at Turtleback Dome Monitoring Site
updated 09/21/2014 01:00 AM PDT

O3 concentration Current Today's
Maximum
Yesterday's
Maximum
8-hour average unavailable 49 ppb   54 ppb  
1-hour average 48 ppb unavailable  57 ppb  

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



AQI Ozone


Particulate Matter (PM2.5) at Yosemite Valley Visitor Center
updated 09/21/2014 01:00 AM PDT

PM2.5 concentration
Current Today's
Maximum
Yesterday's
Maximum
24-hour average 22.7 μg/m3 24.5 μg/m3
1-hour average 0.0 μg/m3 unavailable  68 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 09/21/2014 12:00 AM PDT

Current temperature  57 F 
Yesterday's minimum temperature  55 F 
Yesterday's maximum temperature  73 F 
Current relative humidity  64 % 
Yesterday's minimum relative humidity  32 % 
Yesterday's maximum relative humidity  76 % 
Current wind speed  22 mph  
Current wind direction  ENE 
Precipitation in last hour  0.00 in. 
Precipitation since midnight  0.00 in. 
Yesterday's precipitation  0.09 in. 

map Grand Teton National Park Web CameraGreat Smoky Mountains National Park Web Camera Home Shenandoah National Park Web Camera Hawaii Volcanoes National Park Web Camera Big Bend National Park Web Camera Joshua Tree National Park Web Camera Grand Canyon National Park Web Camera Theodore Roosevelt National Park Web Camera Washington, D.C. Web Camera Acadia National Park Web Camera Mammoth Cave National Park Web Camera Great Smoky Mountains National Park, Purchase Knob Web Camera Great Smoky Mountains National Park, Look Rock Web Camera North Cascades National Park Web Camera Olympic National Park Web Camera Mount Rainier National Park Web Camera Sequoia/Kings Canyon National Park Web Camera Yosemite National Park Web Camera Denali National Park & Preserve Web Camera Point Reyes National Seashore Web Camera
Current Air Quality »
Ozone - O3
updated 09/21/2014 01:00 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 0.0 micrograms per cubic meter
Particulate Matter - PM2.5
updated 09/21/2014 01:00 AM PDT
  • See more air data »
  • Current Weather »
    updated 09/21/2014 12:00 AM PDT
    Temperature
    57 F

    Humidity
    64 %

    Wind
    ENE-22 mph

    Precipitation - 1 hr
    0 in.

  • See more weather data »
  • Feature »
    feature podcast

    Last Updated: September 21, 2014