Temperatures have been on something of a roller coaster the last couple days, with valleys and hills sometimes moving in different directions. Thursday afternoon and early evening temperatures fell sharply in the hills even as valleys warmed a bit. Then warming as an occlusion from a Bering Sea low moved into the area. The trough came through early Saturday morning, with a sharp fall at Keystone Ridge between 5 and 6am, but with no reflection at all in the valley. Mid-morning Saturday, Keystone Ridge is cooler than the airport. That is quite infrequent this time of year when it's not snowing.
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