Summary
The warmest November in Portland history? 2006. The second warmest December in Portland history? 2006. Similar numbers have been recorded for much of the eastern U.S., as well. Day after day of temperatures 10 to 20 degrees above historical averages.
The cause? Persistent, almost unwavering zonal flow of mild Pacific air straight across the lower 48 states.See the full content of this document
Extract
Earlier Than Predicted
Frigid air is bottled up over a small area of the Arctic fo...
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