Here's an updated plot of the standardized temperature departures thus far this winter. The correlation between the valley (Fairbanks Airport) and hills (Keystone Ridge) is 0.85, good but nowhere near perfect given that the two sites are only 14 miles apart.
After the 1-2 inches of snow Friday, skies cleared quickly around sunset and valley temperatures dipped to around 40 below late Friday evening, with overnight lows of 42 below at the airport and 41 below at Goldstream Creek. Here on the hill the temperature hit 27 below about 9pm.
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