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Pattern December - Deal or No Deal?

If you thought the GL low was bad, wait til this happens. Great Canadian low killing Arctic air transport. 1043 in prime position but woof. Window of opportunity to the east. Would need that gigantic low to hang back to the west a bit
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Looks like the FV3 gets the cold air into Canada around Christmas and into the beginning of the new year. It’s a start
 
Areas may be suprised with some hail tommorow with cold air aloft where stronger updrafts develop and still leftover 20-30kt of bulk shear.
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Unicorn...the myth lives on...

View attachment 9343

I don't understand this tweet. At 12Z, not only did the EPS and GEPS maintain the very strong SSW, the weaker GEFS was even a bit stronger than prior runs. Per the graph, the GEPS is predicting what I think is an alltime record +36-7 C anomaly at 10 mb (60-90N) on 12/28! (Off the chart grays start well below that at +32.) GEFS is predicting 10C cooler at only +26-27C 12/27-8. that looks way too low. GFS is even cooler at only +23C and later (12/29). Euro peaks near 12/29. My rough guess is that it is near +32C. Normal for late Dec. is ~+210 K or -63C.

Edit: one of the reasons GFS is too cold could be that it is biased cold in the higher latitudes

http://www.cpc.ncep.noaa.gov/products/stratosphere/strat_a_f/gif_files/gfs_fcst_err_T10_7.png
 
Youve been known to lie, so no believe until posted.

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