Saturday, November 12, 2011

Cold Weather on the Way

Unusually cold weather is on the way for Interior Alaska for the upcoming weak. Here is the 12Z ECMWF valid at 3am AST Wednesday 500mb heights and 850mb temperatures (the color field). I've flipped the image so that the view is "Alaska-centric". The purple color over the eastern Interior and the western Yukon is -24C, and there is a core of colder than -28C over east of Northway. This is easily cold enough to support valley temperatures of 40 to 50 below in places the go clear and calm for a couple of days. This is pretty cold for mid November. With the airmass this cold inversions will not start off especially strong, but by late in the week inversions may become stronger.

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