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Ostrich December

It’s happening

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Wonder if we're ever gonna see mid January 1940 levels of -AO ever again (of course that came during a SSWE).

MSLP-based AO index nearly cracked 7 standard deviations below normal on January 16, 1940 :eek:


Here's the z500 & surface temp anomalies from 20CRv3.


All hell broke loose about a week-10 days after this insane -AO w/ widespread sub-zero and single digit temps across the SE US following that epic storm on Jan 23-24 1940 (which screwed over RDU of course lol)
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