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East Coast Winter Storm (ECWS) potential Jan 21-22 was about 150 miles too far southeast. Is it ATL to New England, or just a portion of or does it yet fritter to a weaker 23-24 event only NJ/PA northward?


wdrag
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Just now, Gravity Wave said:

Plenty of a margin of safety for us if this NW trend continues. With this airmass and the HP where it is, we should stay all snow unless the low passes almost overhead. Plus it looks like the kicker might prevent the storm from getting too far north.

Yep. This one wont cut. It's either gonna miss to the east or crush job. I'm starting to lean the latter

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The question is probably going to end up being the northward extend of this event. I may end up eating my words here but I do not think there are any precip-type issues, most likely snow or no. The HP looks pretty good, the low track about 6-12 hours later/slower than at 12Z which IMO is good. I have a feeling we are working ourselves into a snowy 7 days ahead.

WX/PT

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2 hours ago, Wxoutlooksblog said:

The question is probably going to end up being the northward extend of this event. I may end up eating my words here but I do not think there are any precip-type issues, most likely snow or no. The HP looks pretty good, the low track about 6-12 hours later/slower than at 12Z which IMO is good. I have a feeling we are working ourselves into a snowy 7 days ahead.

WX/PT

how long would this event be?  24 hour snowstorm?

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4 hours ago, eduggs said:

I agree one event (or maybe 2) is more likely than 3 back to back to back. But obviously models don't get confused. Each run is just as likely to be accurate as any other.

GIGO as far as data input is concerned, as you get closer to the event the data is better so the models become more accurate.

 

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52 minutes ago, MJO812 said:

Euro is a tad delayed with the precip.  Starts snowing during the morning hours of Saturday.

 

Very cold temps with snow in the upper teens to low 20s. Ratios would be high.

Any kind of wind kills ratios so never bet on high ratios... they usually dont pan out..

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2 minutes ago, MJO812 said:

Ratios panned out last week when we had a few inches.

Yea small storms with little to no winds is when you see ratios. Was it windy? I dont recall.  I was more talking about the bigger Nor easters that we are looking at... you should know winds knock ratios down...

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East coast snowstorm potential 21st-22nd Atlanta to NYC-Boston: Uncertainty exists on best target, and also where its all snow or freezing rain-sleet. The greatest uncertainty for me is the NYC-BOSTON-I84 corridor. No matter, there does appear to be a strong likelihood of a 5-10" snowfall, especially NC-VA-MD-DE. The snow could fall as sleet-freezing rain Raleigh east. Even Atlanta may see some snow from this. A better idea of timing and target will post tomorrow. If you are interested: The European model has been targeting the entire corridor with a snow storm from near Atlanta to NYC-BOS for a couple of days now, while other models are relucant, so uncertainty exists.
 
Attached experimental graphic which does not include the probable storm continuing on the 22nd. 
 

Screen Shot 2022-01-18 at 6.38.28 AM.png

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Just now, EastonSN+ said:

Looks like the coastal runners are reduced. This leaves two camps one which would be a good hit and the other OTC. 50 50 shot?

I like that there's a nice cluster in a good spot west of the mean there. Still want to see some other guidance come around more. Zero confidence until that happens. The euro has been steadfast in wanting to phase. So we'll see. I feel like maybe the euro would be better in this type of situation, but who knows. 

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This will be the storm that tells us how effective the recent Euro upgrade was. Before the upgrades around 2015, the Euro would often be the first model to lock onto southern stream systems. The GFS and CMC were always too flat and slow to catch on. The next thing to watch will be the mesos. In the old days, we had something called the EE rule. The ETA which is now the NAM agreeing with the Euro was always a great sign. 

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17 minutes ago, bluewave said:

This will be the storm that tells us how effective the recent Euro upgrade was. Before the upgrades around 2015, the Euro would often be the first model to lock onto southern stream systems. The GFS and CMC were always too flat and slow to catch on. The next thing to watch will be the mesos. In the old days, we had something called the EE rule. The ETA which is now the NAM agreeing with the Euro was always a great sign. Hopefully, this will be the comeback storm for the Euro.

Wasn't Jan 1996 one of these EE storms?

and Jan 2016 was a NAM-GFS storm?

Boxing Day was all GFS?

Feb 2006 was a GFS-JAP storm?

PD2 was Euro-NAM?

I'm trying to remember what models did best for all of our 20+ storms....do you think someone could make a table about this and the various indices and ENSO conditions at the time?

 

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2 hours ago, Blizzardo said:

Yea small storms with little to no winds is when you see ratios. Was it windy? I dont recall.  I was more talking about the bigger Nor easters that we are looking at... you should know winds knock ratios down...

Only exception I can think of is JAN 2016 but in that case long duration and high precipitation amounts- 3 inches of liquid- trumped the high winds!

 

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The only thing I am 100% confident of with this storm in NYC Metro is it will be 100% frozen and most likely 100% all snow . I also think the farther south and east you are in the metro the greater accumulations possible............and there is a chance the north - northwest suburbs get close to nothing....

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28 minutes ago, LibertyBell said:

Wasn't Jan 1996 one of these EE storms?

and Jan 2016 was a NAM-GFS storm?

Boxing Day was all GFS?

Feb 2006 was a GFS-JAP storm?

PD2 was Euro-NAM?

I'm trying to remember what models did best for all of our 20+ storms....do you think someone could make a table about this and the various indices and ENSO conditions at the time?

 

These storms all seems like ones where we got NAMd, with the possible exception of boxing day.  I am pretty sure the GFS was first to bring that back.  I don't know about 96 but that was the EE rule era.  

When I say NAMd, I mean it worked out.

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