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 05/23/2013 03:45 PM DT
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Ozone - O3 updated 05/23/2013 03:00 PM DT
| O3 concentration | Current | Today's Maximum |
Yesterday's Maximum |
|---|---|---|---|
| 8-hour average | 41 ppb | 41 ppb | 50 ppb |
| 1-hour average | 50 ppb | 51 ppb | 58 ppb |
*Ozone (O3) is measured in parts per billion (ppb)
Weather updated 05/23/2013 04:00 PM DT
| Current temperature | 65 F |
| Yesterday's minimum temperature | 56 F |
| Yesterday's maximum temperature | 70 F |
| Current relative humidity | 59 % |
| Yesterday's minimum relative humidity | 68 % |
| Yesterday's maximum relative humidity | 100 % |
| Current wind speed | 2 mph |
| Current wind direction | SSW |
| Precipitation in last hour | 0.00 in. |
| Precipitation since midnight | 0.01 in. |
| Yesterday's precipitation | 0.11 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 05/23/2013 04:00 PM DT
Temperature
65 F
Humidity
59 %
Wind
SSW-2 mph
Precipitation - 1 hr
0 in.
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Last Updated: May 23, 2013
