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Winter 2019-20 Medium/Long Range Discussion


Hoosier
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This thread is for systems showing up in the medium-long range.

Have already been talking about it a bit in the seasonal thread, but the extended looks to have some unusually cold air to tap into with even some model/ensemble suggestion of a wintry system or two.  Nothing set in stone of course. 

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The ridge over the NE Pacific is progged to be robust and will send cold south (first into the west but it will swing east and may have staying power given the -NAO)...Canada and the northern Rockies have been building snow pack which will help.  That energy ejecting out of the SW the last couple days of the month could conceivably do something if it ejects right...the SE ridge fighting back probably favors parts of the Upper Midwest or Great Lakes over the Ohio Valley.  After that it stays chilly into early November.  

As nice as the EPS is, its warm bias in the extended has almost been as obnoxious as the GEFS cold bias...the EPS is up and down (probably slightly cool for say Chicago and slightly mild for Ohio overall) through the 29th/30th then quite chilly, so it’s not warm either. 

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4 hours ago, Hoosier said:

The 00z GFS is really close to being a Halloween freakshow.  As is, it's an impressively deepening storm. 

But if the northern energy drops in a little sooner...

Argh. Deepens way too far to the east of us compared to the 06Z 10/20 run. Just raw crappiness, no fun weather for the north-central Midwest (WI/N. IL/E. IA/E. MN).

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2 hours ago, Thundersnow12 said:

Euro crushes parts of IA/MN with a blizzard before Halloween and probably severe with upper 60 dews getting into srn IL and north of the OH River. 

yes, definitely no wx zzzzz's around Halloween .    From high of 70 on the 31st to low of 30 on the 1st.   Lots of rain across the OV over the next 10 days too.   

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00z Euro continues to crush IA, MN and WI with a blizzard next week.  00z CMC has two snowstorms next week also.  06z GFS and 12z ICON shows nothing so far.  If the Euro or CMC verifies, look at the potential for widespread power outages due to most of the trees still having leaves on them (think of October 26, 1997).

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