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January: Medium/ Long Range: May the Force be with Us....


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Sterling mentions storm potential on monday...

 

A shortwave trough is forecast to approach the east coast early next

week. There is still considerable spread on the ultimate outcome in

both timing and precipitation potential/placement. However, winter

weather will be possible since temperatures will remain below

normal. Continue to monitor the forecast for potential impacts

during this period.

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Just now, Superstorm93 said:

Heck of a fetch from the Gulf / Caribbean, which are still cooking as well. 

 

ecmwf-deterministic-conus-pwat_anom-6143200.png

cdas-sflux_ssta_watl_1.png

I was just looking at the 5H vort. It's a touch further south at 6z than 0z, but is stronger with 2 closed isobars instead of only 1. This would definitely come north of 0z if it was to play out. 

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One difference I noticed between the GFS and the Euro/CMC is the GFS de-amplifies the trough as it moves into an upper level convergence zone(flow velocity decreases)- note the area of discontinuity as the flow within the jet streak rounds the base of the trough and encounters the region just upstream of a strong jet streak associated with the massive vortex over the Canadian Maritimes. That weakens the lift as precip moves into our area. The Euro has a more continuous/favorable jet configuration at that same point with a stronger shortwave at h5 and heavier precip at the surface.

1736186400-6h2AEZRHRTc.png

1736186400-gye6cm59PFg.png

 

 

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12 minutes ago, mitchnick said:

I was just looking at the 5H vort. It's a touch further south at 6z than 0z, but is stronger with 2 closed isobars instead of only 1. This would definitely come north of 0z if it was to play out. 

Maybe  but not necessarily. Confluence in front is a bit stronger 6z than 0z

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5 minutes ago, Terpeast said:

Maybe  but not necessarily. Confluence in front is a bit stronger 6z than 0z

It is a tightrope. Based on 0z and 6z, it sure looks like there will be an east-west stripe of over a foot. Exactly where that will be is a moving target unless Superstorm's northern stream possibility comes to fruition. 

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