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Potential winter threats


tombo82685

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Looks strung out compared to the GFS at hr 150. Prob nothing more than a few flurries for Philly *on this run* through 150

A general .10 to .25" from dc to boston.. The lesser amounts as you towards Dc to Philly..

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Yes, I guess the Euro has the same basic idea, just MUCH further north for Maine, rather than for NYC. My only concern is that I have seen the GFS sometimes do better with northern stream systems.

that may be true. I thought i heard the ggem was really good also with northern stream storms.

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From John (Typhoon Tip) on main forum

The 12z deterministic ECMWF run shows at 96 hours that the 582DM height contour is now S of the southern peninsula of FL. That implies reducing resistance. There is also a little more intermediate/southern stream dynamics to offer a better phase out in time. Regardless, this run seems to just miss doing so by a razor thin margin for error... We see a weak coastal reflection and an exotically stretched Miller B presentation in the isobaric layout by 120 hours; the natural question still unanswered points to whether that phase doesn't take place 6 or so hours faster - should that come to pass, look out!
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DT just updated says the storm late this week is def just a new england event, not a mid atlantic event, maybe some lite snow but def not a big event for mid atlantic, but says the storm around jan 11 and 12th could be a significant event.

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DT just updated says the storm late this week is def just a new england event, not a mid atlantic event, maybe some lite snow but def not a big event for mid atlantic, but says the storm around jan 11 and 12th could be a significant event.

To my knowledge there is not a model that is showing a storm around the 11th and 12th at this point and time..whether that be the GFS or the ECM ..And it is also way to early to say whom this upcoming event for the 7th is going to favor. DT generally goes by the ECM so his saying what he said should be no surprise..but i would err on the side of caution considering the failure the ECM had with this last system where it had to play catchup to the GFS...

I think the ECM is probably more of a fast outlier here compared to the rest of the guidance with the way it is handling the low pressure going from Montana to WIsconsin ...

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Jan 11-12 is probably too early to the pattern to reload - esp with the -PNA pattern expected to set up across the West during that time. I'd look a little further out for a sig snow event in our area.

Most likely January 15th or so.

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