December 2025 OBS and Discussion

[eduggs]

I'd like to see a sharper trof like last night's GFS and UK. That allows more intense and widespread precipitation and it also anchors the surface high further west in Quebec due to the strongest upper level convergence staying further west. With a more positively tilted trof, the surface convergence shifts east and the surface high goes with it.

(upper levels and surface are connected in the sense that converging air aloft tends to sink [surface high pressure] and diverging air aloft tends to rise [surface low pressure])

[NEG NAO]

10 minutes ago, MJO812 said:

I thought the Euro is usually overamped and the gfs is too progressive.

Obviously not after 12Z run

[psv88]

We are back to bashing all models that don’t show our preferred solutions and praising the models that do, no matter what model it is. 
 

gotta love this place. 

[North and West]

We are back to bashing all models that don’t show our preferred solutions and praising the models that do, no matter what model it is. 
 
gotta love this place. 

.

[milleand]

1 hour ago, psv88 said:

We are back to bashing all models that don’t show our preferred solutions and praising the models that do, no matter what model it is. 
 

gotta love this place. 

Tis the season !