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March 6-8th Ocean Storm Discussion Part II


free_man

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It's gonna be a system somewhat past it's peak, large expansive and maturing, which is what helps push the qpf shield this far afield into SNE in the first place

 

So yeah a long duration light/mod event and not a great thing for the coastal plain. ORH would probably jackpot as usual.

 

 

 

 

 

Precip rates suck though. Not good for BOS.

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Yeah... verbatim the Euro probably isn't much accumulation for many spots in SNE. 

 

That's been the trap most of the winter and the biggest reason people crap on the GFS.  A compromise of all the others is the way to go at least through the 18z.  the thing about this event is the Euro appears to have done poorly with almost every feature involved, very unusual.  Note the changes to the bottom loaded ULL this run - a characteristic of the GFS runs.  It's still not quite there with the feature rotating through New England, and it continues to run after run pull the northern s/w near the border west causing a better alignment.  Worst performance I can remember by it, and perhaps a red flag towards the GFS.

 

But for now, this is playing out like all the other systems this winter where the Euro was woefully suppressed.  In all of those cases NCEP went wild for awhile (gfs/nam) only to come back to the pack.

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Kocin is the man too....love the update

 

" THEREFORE...THE 12Z
GFS PROVIDES NO NEW INFORMATION EXCEPT THAT IT HAS BEEN VERY
CONSISTENT WITH ITSELF. HAVE ALSO LOOKED AT THE 12Z UKMET AND
CANADIAN EVEN THOUGH I AM  NOT SUPPOSED TO INCLUDE IT YET...BUT
BOTH SEEM TO SUPPORT THE 12Z GFS
...WITH THE 12Z UKMET CONTINUING
ITS TREND OF MOVING NORTH OF THE RUNS 24 HOURS AND GREATER.  THE
12Z CANADIAN DOES NOT TAKE MUCH SNOWFALL INTO SOUTHERN NEW ENGLAND
ON THURSDAY. WILL HAVE MORE TO SAY

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All aboard the GFS one last hurrah for me i think. SNE crew, were playing with house money here,if we dont get it, no big loss, we had an epic February!! If we do, this is a bonus and will probably be the last major winter storm for me as i leave the east coast later this year. Its been a wonderful 9 years tracking these things with all of you. Ill never forget it!!

just to repeat cause im an attention whore lol admitedly
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It's gonna be a system somewhat past it's peak, large expansive and maturing, which is what helps push the qpf shield this far afield into SNE in the first place

So yeah a long duration light/mod event and not a great thing for the coastal plain. ORH would probably jackpot as usual.

I mean verbatim...I think the final outcome is more amped them this run.

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This is going to seem a bit "out there" to some folks/readers, but this hearkens back to an advance FAST (Forecast Analysis and Synoptic Techniques) II discussion during my Senior year up at UML. 

 

The atmosphere has a kind of "pseudo elasticity" about it.  The whole of the domain has a hidden differential that pulls and contorts everywhere.  In effect, systems that are significantly morphed over the Pacific domain can translate an effect on variables in the physical equations, transitively, half way around the world.  

 

Anyway, there is a hidden flavor of that going on with this thing.   I mentioned earlier that the GFS was subtly turning the trough more negative relative to the surrounding medium across the last 4 cycles.  But one thing I have noticed is that the ridge associated with the -NAO is morphing and the atmosphere is "sloshing" back west with wave lengths as a result.  It's the stretching and contracting of one feature in one location, that is helping to induce changes in a different location - it's kind of like micro-teleconnective responses.  

 

Fascinating - really

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Well I'll clearly be wrong about the euro with just one nudge north. But, tough to really argue either way with the gfs behavior lately and other guidance not buying. The red flag that made me uneasy were the ensembles. They led the way.

Euro ensembles getting better qpf in here at 3-4 day lead time than the OP is a bit of a red flag as well. The Euro ensembles were one reason I stayed pretty bullish in the inverted trough Feb 24 event...they really had a nice looking setup.

Still though, even the Euro ensembles will probably end up way too far south at 3-4 days lead. We'll see if the GEFS stay the course in the next 24 hours...they definitely made it a head scratcher since 18z yesterday when they nearly all agreed on big hits.

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