26% Relative Humidity

The skies over Chiloquin OR were completely filled with so-called “persistent contrails” despite the most recent relative humidity reading from 60 miles away being just 26% at cruising altitude.

Condensation trails cannot form in the absence of condensation nuclei at less than 100% relative humidity.

Oh, and we also got an #incrediblyraresundog

Wyoming Soundings – http://weather.uwyo.edu/upperair/sounding.html

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