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Beginning July 6, there will be temporary impacts to NSF NCAR Road, Parking Lot, and Trails. View more information.

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Foggy Weather

UCAR

Fog often forms when relative humidity is at 100%.

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This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the U.S. National Science Foundation.