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Severe Weather 2021

Looks like trouble brewing on today’s 12z euro In extended period …

This isn't just a EURO thing. We are getting a lot of signals for an extended return flow and a period of above average temperatures next week. Moisture levels look plentiful. Should energy ejection from the west misbehave watch out!
 
The 12z GFS and 12z Euro Dewpoints/Surface temperatures valid around the 31st. Like @Taylor Campbell said, this would be trouble. Honestly, I would expect a severe weather threat around this time especially based on the signals that we should go into a colder pattern next month.
 

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This isn't just a EURO thing. We are getting a lot of signals for an extended return flow and a period of above average temperatures next week. Moisture levels look plentiful. Should energy ejection from the west misbehave watch out!
Agree with u. Just put more merit with euro at this range … but gfs has same idea no doubt . Got my attention for sure
 
Very interesting discussion in today's SPC Day 4 thru 8 Outlook from Tuesday through the 31st especially this last section. Clearly to have the Gulf loaded with 70 dewpoints is bad in itself
 

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GEFS shows the possibility for severe weather around New Year's since yesterday. This is the collective probability of SCP above 1 for 18Z on 12/31, based on all ensemble members.

1640271068852.png
 
I've outlined a general area that could be impacted by this potential severe weather threat next week.
 

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Seems to be a good bit of variability at this range with trough evolution. One thing for sure though is quality moisture return will be in place. Days upon days of return flow from the south.
It is possible that there will be several shortwave impulses rather than a single consolidated ejection. The LR EPS hints at a cutoff under the NPAC blocking ridge.
 
The 18z GFS CWASP valid the 29th and then the 31st.
 

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Looking at the 18z GFS temperature and dewpoints, this looks like this could be a multi day severe weather threat as well.
 

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