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Last week bitterly cold air developed over east central Siberia, the likes of which we haven't seen in 40 years this early in December. It was chronicled very well by @ThierryGooseBC on December 6.



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Ever since then the weather prediction models have been showing some crazy, downright silly numbers across Canada & the United States. I'm talking record high Mean Sea Level Pressure, both for December & ALL TIME. Here are those MSLP records from @NWSWPC researchers.

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For those not used to reading these maps, the values shown are the last three digits of the MSLP. For example, in #Missoula the all-time highest surface pressure observed was 1059.9mb on January 1, 1979. The record for December was 1054.5mb on #ChristmasEve, 1983.

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