December 1st-3rd 2019 Winter Storm Potential

Quick update.  Not thrilled at some of the subtle trends regarding the blocking features I outlined, although also not that surprised again given some of my concerns outlined above.  

That said an initial over running event for snow on Sunday is possible.  Details still too far out...and dont look away from Monday yet either...not dead yet.    

And Ray it did come off a little snarky when I first read through it (knee jerk reaction), but your right I know you well enough now to know what it was all about.  I was playing snarky back at ya. All good in the hood.

NWS trended warmer for me.Snow , to mix rain and snow, then ending as snow.It was all snow yesterday.Hopefully, the ground will get covered for the first measurable snow up here.

Its 4 days away one or two models runs c and that isn't the final solution we have time. Also the eps showed some big hitters monsters

Does anyone know where the eps stamps are the 50 on weatherbell? Since their new format I can't find them. I hate the new format.

12z GFS seems to stick with the idea of the low cutting to our west with a brief overrunning event; warm air spreading north changing any frozen precip to rain and then the precip being gone before the cold air crashes in behind. Right now it shows most of us starting as snow early Sunday, but fairly quickly turning over to predominately rain. Exception seems to be further north in the Hudson Valley where the snow hangs in longer and may therefore accumulate a little before going over to rain.

If the primary doesn't transfer sooner (Delmarva), then coastal won't be much white stuff for most folks. Yesterday models showed a better ridge pushing down on the low forcing it lower latitude and allowing for transfer at more favorable latitude. This allowed colder air for better WAA snows as well as some some snows from coastal low.

I would set my over/under at an inch for now for most folks. Can't get much lower than that so no disappointment.

GFS is having some problems with this system IMO. 24 hours or so ago it was doing a loop with the secondary low. Some accumulating snow is still on the table for people 50 miles N and W with some rain and sleet also likely. Thermal profiles are tricky and we are still 4 days away. Happy Thanksgiving to all.

hyde345 wrote:GFS is having some problems with this system IMO. 24 hours or so ago it was doing a loop with the secondary low. Some accumulating snow is still on the table for people 50 miles N and W with some rain and sleet also likely. Thermal profiles are tricky and we are still 4 days away. Happy Thanksgiving to all.

I agree more significant accumulations N&W of 95 are more likely and it's not a dead threat yet IMO.  Coastal redevelopment 100 or even 50 miles south and east will have significant implications on the forecast and this is quite possible with a 50/50 low in the mix.  Moreover, at 5 days out model error is way too high to throw the towel in.  Just have to see the next few days.

The Euro and GFS have flip-flopped with the Euro being the coldest solution. Anyway we have two ways to snow with this system one is the front end over-running precip and the second is where the secondary develops and if it closes off at H5 where the defamation band sets up. I feel more confident with the over-running who knows where the secondary will form. models will not have a good idea on this until Friday or even Saturday.

I"m hearing the latest EPS run has many members showing big hits along the coast.

EPS just came back and from its Dr. No stand and said I am Dr Yes. Time will tell. The model dance has and will be fun. Need better sampling of pieces of energy or playas.

Snow on Monday or Sunday night please extend the weekend for us teachers!!

Some big hitters and yes I will take member 19

So we are not going to talk about the N(ot) A M(odel) ?

Eps looks good

skinsfan1177 wrote:Eps looks good

That’s a healthy average. I wonder if big hitters are skewing mean. We shall see how things look tomorrow.

The primary is hanging on too long on the latest mode runs. By the time the secondary develops off the coast our boundary temps are torched.

The blocking has trended weaker too. Considering the -NAO was/is the number one signal we need on our side in this setup that is not good.

Let’s see where we stand tomorrow. But confidence down tremendously today.

Latest Euro is gung-snow, even down to the City, Long Island, N NJ (control top, mean bottom). We’re still a ways off from this potential storm so expect the ‘windshield wiper’ effect across the models til at least late Saturday.

One thing I would like to see is a shift 50-75 miles south and I think it's possible.

SoulSingMG wrote:Latest Euro is gung-snow, even down to the City, Long Island, N NJ (control top, mean bottom). We’re still a ways off from this potential storm so expect the ‘windshield wiper’ effect across the models til at least late Saturday.

12z ICON is also snowy

Big improvements on the GFS. Aside from the warm surface temps, looked very good like the Euro ens and Icon

CMC, Euro, Ukie all give northern areas big snows. I'm not completely sold on that because a lot of that is sleet but I think we get a plowable snow after all is said. Even GFS gives me 6 inches as upper level low tracks south and east of area.

The latitude of the H5 is good.  Trough tilt a little positive, would like to see more neutral/neg to throw back the snows better.  i think something like this would get it done for a lot of folks.  Cutoff ULL can meander a bit. The GFS was showing this two days ago.