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2/19 Weekend Threat


am19psu

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i've learned not to count on the euro being wrong at this range when it shows the same thing a few times...

In general, yes.

That's generally the way to go, but given the complexity and speed of the pattern you basically need to throw all of the preconceived notions of the models out the window until we hit the Day 3 range. This one's a true wildcard.

Meh...one model is really showing a hit for the most part...other than that, we had one run of the Euro and a few grazes here and there...it really hasn't been a true wildcard. Definitely keeping an eye on but a "lock" either way.

I side with Adam -- lean towards suppression at this point.

I will say this...I would not be shocked if the Euro sometime in the next three runs shows an East Coast hit. It sometimes has a "burp" once where it will show the opposite of reality before settling on the likely solution.

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Ok, so about 5-8 members are solid hits for the East Coast. So, the ensemble mean is spitting out 2-4 for PHL, but I think it is a boom and bust mean. The median is probably 0.

Is the Op representative of the OTS camp? Or is in between the OTS members and the EC hitters?

There's rumors of initialization errors on the GFS. Anyone hear anything similar?

HPC's morning disco said they're tossing the GFS solution because of the errors. I'm not sure if that includes the GEFS as well, but I'd guess they're suspect as well.

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The thing i don't like and why i think this is a thread the needle for the city and immediate burbs. You don't have a strong high pressure but on the other hand you do have a 50/50 low which will keep somewhat of a high in place and create confluence. The cold air isn't in place before the storm comes, its coming in as is the storm, which screams bl issues for atleast the coastal plain to start. On the models i have seen crushing the storm to the south are the ones with a dominant northern stream with confluence ripping across the region. The amped solutions, the gfs phase in the northern stream. The problem is we need the northern stream to usher in the cold air. To much of a phase will pump the hgts along the east coast and you get a warm scenario. To much northern stream interaction and you get a suppressed storm. So you need the right amount of phase for a good track and you need that pv sliding across to be positioned well to usher in the cold air.

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thats a very well worded discussion......imo

Eric always gives good discussions. He is a very cautious forecaster, doesn't hype but will get excited when a snowstorm is coming. Back during the storms of 2009/2010 i would email him and he would get back to me right away.

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The thing i don't like and why i think this is a thread the needle for the city and immediate burbs. You don't have a strong high pressure but on the other hand you do have a 50/50 low which will keep somewhat of a high in place and create confluence. The cold air isn't in place before the storm comes, its coming in as is the storm, which screams bl issues for atleast the coastal plain to start. On the models i have seen crushing the storm to the south are the ones with a dominant northern stream with confluence ripping across the region. The amped solutions, the gfs phase in the northern stream. The problem is we need the northern stream to usher in the cold air. To much of a phase will pump the hgts along the east coast and you get a warm scenario. To much northern stream interaction and you get a suppressed storm. So you need the right amount of phase for a good track and you need that pv sliding across to be positioned well to usher in the cold air.

All great points and what I was referring to earlier irt the lack of any real cold air. The quasi 50-50 (50-60?) isnt really helping us....it;'s actually hurting us more.

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All great points and what I was referring to earlier irt the lack of any real cold air. The quasi 50-50 (50-60?) isnt really helping us....it;'s actually hurting us more.

I deff think its helping us because without that, talk of snow would not even be thought of this would be a rain event. That pv sliding across is giving us our shot at a storm and allowing this not to cut.

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I deff think its helping us because without that, talk of snow would not even be thought of this would be a rain event. That pv sliding across is giving us our shot at a storm and allowing this not to cut.

Agreed. The 50/50 is the only thing helping us out with the +NAO right now. This would cut to the lakes without it.

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I deff think its helping us because without that, talk of snow would not even be thought of this would be a rain event. That pv sliding across is giving us our shot at a storm and allowing this not to cut.

this is completely right, without the 50/50 low this storm cuts west. the 50/50 is the main feature that has people thinking an east coast storm with some snow is possible.

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I deff think its helping us because without that, talk of snow would not even be thought of this would be a rain event. That pv sliding across is giving us our shot at a storm and allowing this not to cut.

if it's too strong and too far southwest it will suppress. That's what the EC is showing. 50/50 is sub 516 over the Gulf of St. Lawerence on the EC, while it's only 520ish over Newfoundland (it's farther northeast) on the GFS.

It's not clear cut that you need the 50/50...you need it in the right spot at the right strength.

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if it's too strong and too far southwest it will suppress. That's what the EC is showing. 50/50 is sub 516 over the Gulf of St. Lawerence on the EC, while it's only 520ish over Newfoundland (it's farther northeast) on the GFS.

It's not clear cut that you need the 50/50...you need it in the right spot at the right strength.

true, but my pt is, if we didnt have that, the chances of any potential snow event are less likely than with it

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true, but my pt is, if we didnt have that, the chances of any potential snow event are less likely than with it

I would agree with this...I wanted to make sure folks understand that a 50/50 doesn't necessarily guarantee a hit at all. Not in this setup.

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Of course the GFS took it to the woodshed in the December 26th 2010 snowstorm. Also the February 2006 storm the Euro was late to the party. Unfortunately they are the only two i can think of right now where the Euro was wrong less then 3 days out.

You are totally rewriting history here. The EC was onto this for a long time in the medium range while the GFS was way off. Then there was a day (12Z on the 23rd) where the EC backed off and almost instantly the GFS jumped on board. By 0Z on the 25th everyone was on board.

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