![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNbo5ts-riLHUkvaBNGBPdw7mXTMvNkXQFc57CodRcxbBxbOIZdVnHG2cPlT1nr6JH9LiUhGDnF945dU9IvlLC5wiLNfw_ln6T2ohA7ETY3AVNQdqVDaQp2bbARe7BgZTQKm8uE0mr1g/s320/Temps_Dec_4_2010.jpg)
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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