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December 10 -11 3rd Wave


NEG NAO

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That's a very good step for the Euro . Its now showing up 2 inches in CNJ and about 1 inch to the North , Consider its last 2 runs it was way South and East. Lets see if there s another tic N on todays 12z

Th GFS and NAM are prob in the 3 - 5 area , and if they hold , its possible you can just blend .

 

But its good that the Euro now sees it . Not a Whiff like before

 

6z NAM in the 2- 4 range . looks like the  models are closing in on each other

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gfs_pr3_slp_t850_east_13.png

850`s Minus 9 , surface temps in the upper 20`s .

GFS 3 - 6

NAM 2 - 4

 

Euro 1 - 2   

 

I like the higher end with this one The GFS and NAM have been consistent run to run over the past 2 days with this

The Euro has stepped N since yesterday , so maybe its  a case of playing catch up .

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gfs_pr3_slp_t850_east_13.png

850`s Minus 9 , surface temps in the upper 20`s .

GFS 3 - 6

NAM 2 - 4

Euro 1 - 2

I like the higher end with this one The GFS and NAM have been consistent run to run over the past 2 days with this

The Euro has stepped N since yesterday , so maybe its a case of playing catch up .

That still shows about an inch or less for my area so hopefully that trends. Bit more north for me :)

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This looks like a quick hitting event and I am still searching for dynamics to support heavy banding but haven't yet found them.

The mid level disturbance is fairly elongated over PA and the OV when it kicks off precipitation. But the front and offshore baroclinic zone look to be the focal point for developing stray precipitation.

So in general I think we're looking at a 1-3" event -- it also will be important to watch the boundary layer and see what initially accumulates. We'll probably have some good ratios with big time cold air moving in aloft.

I'm not sure anyone would complain about a solid advisory level snowfall. But I still would like to see the RGEM and Euro trend a bit westward and not have the NAM and GFS tick east a bit. Lower QPF values and lighter precipitation are going to lean this storm on the lower side of 1-2" for sure..and it probably will be less in some spots.

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This looks like a quick hitting event and I am still searching for dynamics to support heavy banding but haven't yet found them.

The mid level disturbance is fairly elongated over PA and the OV when it kicks off precipitation. But the front and offshore baroclinic zone look to be the focal point for developing stray precipitation.

So in general I think we're looking at a 1-3" event -- it also will be important to watch the boundary layer and see what initially accumulates. We'll probably have some good ratios with big time cold air moving in aloft.

I'm not sure anyone would complain about a solid advisory level snowfall. But I still would like to see the RGEM and Euro trend a bit westward and not have the NAM and GFS tick east a bit. Lower QPF values and lighter precipitation are going to lean this storm on the lower side of 1-2" for sure..and it probably will be less in some spots.

 

 

Some good news early is the end of the current HRRR runs down in the TN Valley for 00Z tonight show precip being way more west in line with the NAM/RGEM vs. the Euro

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May not be too far from the truth considering what happened south of us. At this juncture i am not dismissing any "crazy" solution after some of the unexpected high totals achieved in PA and DE

This could still be a minor or non-event for us. The dynamics with the wave aren't particularly strong and are zooming to the east. It very well could get organized too late for us to see much snow. Let's see how 12z and 0z tonight pan out-it's a very fragile setup. If I had to guess right now I'd say 1-3" areawide-1" well inland and 3" for coastal areas.

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Most tv mets are already saying 3-5" area wide... That's not like them especially after these last 2 events lol. I def don't see 3-5 for anywhere above NYC... Am I wrong on this?

the higher  totals should once again be in the southern half of the forecast area - BUT after what happened yesterday to the south of us  its way to early to try to pin down exact totals - have to leave all options on the table and it will probably end up being a NOW forecasting event with a surprise or 2 thrown in for good or bad measure.........

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It's the NAM. Until the Euro comes fully on-board, I think a miss or pretty much non-event is just as likely as something more substantial. Sheared out energy racing to the east is very rarely anything notable around here.

Just like seeing it hold serve. Euro was def not nothing last night

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I don't get why people are saying if the euro doesn't come on board, it's not happening. The euro has been pretty bad recently. It isn't the end all be all, and clearly is not as zoned in as it was last winter

I think this event still may not happen, but I don't know why I've seen all over twitter and what not that the euro isnt great so this isn't happening

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I don't get why people are saying if the euro doesn't come on board, it's not happening. The euro has been pretty bad recently. It isn't the end all be all, and clearly is not as zoned in as it was last winter

I think this event still may not happen, but I don't know why I've seen all over twitter and what not that the euro isnt great so this isn't happening

 

The Euro in the short range does poorly with these weak type fast moving events alot of the time, everyone recall the event last winter all models had pegged as a near miss but the Euro had 2-3 or 2-4 for days on end and even up until the last minute and the other models all verified on a miss...for whatever reason its more effective it seems with stronger more dynamic systems in the short term as a whole...the danger in this event is there may be a shadow effect somewhere in the area....likely NW of NYC but you can see it on the models a bit, that leading band of snow may hit one region while the secondary coastal one misses them to the east.

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I don't get why people are saying if the euro doesn't come on board, it's not happening. The euro has been pretty bad recently. It isn't the end all be all, and clearly is not as zoned in as it was last winter

I think this event still may not happen, but I don't know why I've seen all over twitter and what not that the euro isnt great so this isn't happening

The Euro hasn't been as good as past winters, but it still shows how this can be largely a whiff. I'm not dismissing the potential outright, I'm just saying it's a fragile setup that can easily fall apart for us. Hopefully that's wrong and we get a nice few inches for the area. Ratios will also likely be more than 10-1 given the cold mid level air, so 0.25" liquid can mean 3" or more snow.

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