For more information about National Park Service air resources, please visit http://www.nature.nps.gov/air/.
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View From Purchase Knob
Looking Northeast - Air Data
& Weather - NPS Air
Webcams
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updated 05/21/2013 02:00 PM EDT
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Ozone - O3 updated 05/21/2013 01:00 PM EDT
| O3 concentration | Current | Today's Maximum |
Yesterday's Maximum |
|---|---|---|---|
| 8-hour average | 39 ppb | 40 ppb | 47 ppb |
| 1-hour average | 36 ppb | 47 ppb | 51 ppb |
*Ozone (O3) is measured in parts per billion (ppb)
Weather updated 05/21/2013 02:00 PM EDT
| Current temperature | 67 F |
| Yesterday's minimum temperature | 55 F |
| Yesterday's maximum temperature | 68 F |
| Current relative humidity | 86 % |
| Yesterday's minimum relative humidity | 76 % |
| Yesterday's maximum relative humidity | 100 % |
| Current wind speed | 7 mph |
| Current wind direction | ENE |
| Precipitation in last hour | 0.00 in. |
| Precipitation since midnight | 0.00 in. |
| Yesterday's precipitation | 0.00 in. |
*Air quality monitoring at Purchace Knob is jointly supported by the Friends of Great Smoky Mountains NP, the National Park Service, the State of North Carolina - Division of Air Quality, and the National Oceanic and Atmospheric Administration.
Current Air Quality »
Current Weather »
updated 05/21/2013 02:00 PM EDT
Temperature
67 F
Humidity
86 %
Wind
ENE-7 mph
Precipitation - 1 hr
0 in.
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Last Updated: May 21, 2013
