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December 2016 Discussion & Observations


bluewave

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2 hours ago, forkyfork said:

i made a very weak nina/cold neutral composite for january

VDmw4eGv4n.png

Interestingly enough, the composite 500 mb pattern for cases when the 12/20-31 AO peaked at +3.500 or above reverted toward the composite neutral-weak La Niña pattern shown above during the January 16-31 timeframe, especially in North America. 1984 was the only common case. The other cases were 1952, 1972, 1976, 1991, 2000, 2007, 2012, and 2016.

Jan16-3112212016.jpg

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6 hours ago, Morris said:

Park stuck at 39.

The 37 low is a +7 minimum departure. Not much in the way of colder weather around until the frontal passage near the end of the month.

It's interesting how persistent the December thaw has been after the solstice in recent years. Decembers with the heaviest snow or coldest

temperatures of the month after the solstice have been tougher to come by recently. Would be nice to see another Boxing Day Blizzard some

time in the future.

M7D7.jpg

 

 

 

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