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12/19-12/20 threat


CoastalWx

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All I remember is hearing reports of +RN on the CT/NY border while 40 miles west received 30".. That was remarkable..

Just 5-10 miles east of here the storm was mostly rain during the day whereas I had already picked up nearly 10" snow....I guess the 350' elevation helped me a bit but still just a remarkable gradient and a very unusual system in a winter of powerful Nor'easters. I wouldn't mind a slightly farther east version of the Snowicane on this event to placate most of the SNE crew while we still get hammered with a good snowfall and take advantage of all the cold air we've been dealing with lately. The snow pack would probably last a while given that no run of any model has shown a real warm-up as move towards XMAS and the New Year's.

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FWIW, the 03z SREFs are absolutely putrid. Looks like a wide right miss. Though they are relatively useless at this time range.

Verbatim yeah putrid..but I thought 500mb showed promise didn't you? The SL forms well offshore but it likely would track nne from there and still miss but not be too far offshore. There was a lot of spread NW of the low too.. which I think would mean some members are tracking it there. Anyways not terribly important..

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All I remember is hearing reports of +RN on the CT/NY border while 40 miles west received 30".. That was remarkable..

I remember driving in to work that night from Danbury to East Fishkill NY. I left my house at 11:30 pm with rain falling. Got to I-84 (1.5 miles from house) and first flakes were mixing in. Just one more mile driving west, no kidding, not only was it snowing heavily, there was already 3 inches of snow on ground, highway covered. The eastward progress of cold air had to be moving about 10 feet per hour. Needless to say, by the time I got to work, there was 13 inches on ground, snowing heavily with a final tally of 21 inches in East Fishkill, Danbury total was 5 inches and rain in Northern New England. A once in a lifetime "upside-down" storm.

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At any rate....off to bed....that was a good save by the Euro for the 00z suite....first time its showed a monster hit for most of SNE. We'll hope it wasn't a burp run. It obviously had some big changed with the amplification of the eastern heights as it went through that run.

Lets hope it stays the same or even better at 12z tomorrow...if it does, we'll be about at "bulls eye range" for the Euro...the fact that it went so favorable at this time period is significant to me right now. But I'm very weary of a "burp" run...because the Euro can do that.

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Probably, but I always have that never say die attitude about snow. ;) If the forecast is for flurries and I manage a few inches I'll be thrilled.

I have mainly been watching the LES snow event unfold tonight. Rare LES Advisory up for this zone.

I think you are done personally...I'll be happy to see a few inches here. The 00z Euro was great, but I'm skeptical is comes that far west. But we'll see. I'd love to grab warning criteria snow out of it.

But if you held a gun to my head, I'd much rather be in BOS than my location...nevermind out in the helderburgs where you are.

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Well I guess its time to simmer down from the 00z Euro bombshell....that was quite a run.

And skier...you and Socks need to stop getting into monster arguments in these threads...but I'm sure he is a little pissed that you in Lyme CT has a much better advantage over the snow mecca of Dobbs Ferry. :snowman:

Longitude is likely to win in this system....we could all still whiff easily....but Cape Cod is a place we might like to be right now. I'd pick Boston over my BY right now.

Who is socks? Is that your nickname for Nate? Lol  They do kind of argue like best friends sometimes do.

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Looks like Walt Drag wrote this for the Philly areas long term AFD....

NO CHANGES WERE MADE TO THE LONG TERM. THE ECMWF AND GFS FLIPPED AS

TO THE MOST WESTWARD AND EASTWARD SOLUTIONS. THE SOUTHERN STREAM

SHORT WAVE WILL COME IN BETTER RAOB COVERAGE ON THE 12Z RUN. THE

ENFORCER THAT SET OFF THE NEGATIVE TILT TROF ON THE CURRENT ECMWF

THOUGH WILL PROBABLY NOT MAKE IT INTO BETTER RAOB COVERAGE UNTIL

TONIGHT`S RUN.

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SUN AND MON...

UNFORTUNATELY MODEL RUN TO RUN CONSISTENCY REMAINS POOR HOWEVER

THERE IS A BIT MORE CLUSTERING OF AN OFFSHORE TRACK PER THE 00Z

GFS/GEFS/UKMET AND CANADIAN GGEM. ALTHOUGH THE NEW 00Z ECMWF HAS

MADE A LARGE CHANGE FROM ITS PREVIOUS RUNS WITH NOW A 974 MB LOW

ABOUT 50 MILES ESE OF NANTUCKET 12Z MON! THE ECMWF THEN HAS THIS LOW

BECOMING OCCLUDED AND VERTICALLY STACKED OVER CAPE COD LATER MON/MON

NIGHT BEFORE MOVING OUT TO SEA. AS YOU CAN IMAGINE THE ECMWF

GENERATES HEAVY PRECIP WITH OVER 2 INCHES OF LIQUID QPF ACROSS

SOUTHEAST MA DURING THIS TIME. THUS POTENTIAL FOR A MAJOR SNOWSTORM

/POTENTIAL PTYPE ISSUES CAPE COD AND THE ISLANDS/ ALONG WITH VERY

STRONG WINDS. ALTHOUGH THE REMAINDER OF THE 00Z MODEL GUIDANCE

SUPPORTS AN OFFSHORE TRACK WITH JUST A GLANCING BLOW FOR THE REGION.

THUS A LOW CONFIDENCE FORECAST CONTINUES.

GIVEN THE TIME RANGE HERE /3.5-4 DAYS AWAY/ AND THE LARGE RUN TO RUN

DIFFERENCES AMONG THE MODELS ESPECIALLY THE GFS...THINK ITS PRUDENT

TO KEEP THE DOOR OPEN FOR ONE OF THREE SCENARIOS...1)AN OFFSHORE

TRACK PER 00Z MODEL CONSENSUS...2)THE MORE ROBUST ECMWF

SOLUTION...3)AND SOMETHING IN BETWEEN THE 00Z ECMWF AND MODEL

CONSENSUS.

DON/T WANT TO COMPLETELY DISCOUNT THE 00Z ECMWF GIVEN ITS SUPERIOR

VERIFICATION AND THE FACT THAT THE SYNOPTIC SCALE FLOW IS SOMEWHAT

FAVORABLE FOR EAST COAST CYCLOGENESIS GIVEN RETROGRADING UPPER AIR

PATTEN SUPPORTING A STORM TRACK CLOSER TO THE COAST. IN ADDITION THE

MORE AMPLIFIED SCENARIO BY THE ECMWF IS PLAUSIBLE AS THE SHORTWAVE

AND DEVELOPING SFC LOW ENCOUNTER AN UNSTABLE MARINE ENVIRONMENT WITH

INCREASED BAROCLINICITY FROM THE CURRENT STRONG COLD ADVECTION FLOW

OVER RELATIVELY WARM OCEAN WATERS. NEVERTHELESS WILL JUST HAVE TO BE

PATIENT AND WAIT FOR MODELS TO BEGIN CONVERGING ON A SOLUTION BEFORE

WE CAN PROVIDE SPECIFICS REGARDING SNOWFALL AMOUNTS AND TIMING.

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LOL, Will texted me about 00z and I almost put my head through the wall, until I saw the part about the euro. I almost woke up my wife with a yell. EC ensembles like Will said, came west too. Lets hope 06z runs are ok. 06z NAM would be a late hooker.

LOL he texted me at 2:45 AM..Heavy heavy snow is now locked

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w t f

These models are ridiculous.:fever:

My thoughts exactly after having read the overnight conversation. GFS bails on us, Euro kicks in the door. I put no stock in the GFS, and with the Euro making a sudden jump westward I can't give that any viability yet either. Just no consistency with any model now. I'll keep my original thought of scraper for this event, though if the Euro can give three consecutive consistent runs I'd ride that.

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When the Euro makes a huge jump one way or the other it always sets the trend....That's a DT rule..tried and true

My only concern is that the euro op is now the western outlier. I agree with Will in that I think it will be hard for this to come much farther west. In fact, it may tick east at 12z. It was also encouraging to see the ensembles further west as well.

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My only concern is that the euro op is now the western outlier. I agree with Will in that I think it will be hard for this to come much farther west. In fact, it may tick east at 12z. It was also encouraging to see the ensembles further west as well.

It looks like it was generated by the PV retrograding west. 06z GFS came back a little west compared to 00z.

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