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NYC/PHL: January 25-27 Potential Bomb Part 4


earthlight

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This storm really slowed up on the 6z runs. That is a good thing because it would allow the new high to come down and establish a cold air source for our storm. What looked like a Tuesday into Wednesday threat is now looking like a Wednesday into Thursday threat. All the models are starting to show the high to the north. Very interesting.

Be careful what you wish for. That high also pushes the storm OTS as it delivers the cold air as per 6z runs.

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DT first guess map has NYC in 6-12 and CT in 12+

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http://www.wxrisk.co...011/01/NE1g.jpg

He tends to run a bit high on his first guesses but generally has a good idea of where the heavier amounts are....I would envision something 4-8 or 5-10 or so if the NYC region could get into the CCB...it would definitely be the tree breaking/power outage/back breaking type of snow.

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If you know anything about DT at all you would know he hates the GFS, and since the EC is hanging in there I doubt he will change.

Speaking of hating the GFS, JB update this morning is a complete trashing of the GFS. He says the low track will be just inside Hatteras and Cape Cod with the heavy snows west of the big cities. Snow to rain in NYC on Wednesday.

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You guys are not getting a snowstorm on the east coast I'm sorry but there's next time. You guys actually believe DT, all along he has been saying this will go west of the Mississipi river. Not that I'm jealous but......

You should spend more time with your Ottawa Blizzard counter part in Don Sutherland's threads asking Don for updates every 15 minutes on how cold and how much snow will occur in Canada.:arrowhead:

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Speaking of hating the GFS, JB update this morning is a complete trashing of the GFS. He says the low track will be just inside Hatteras and Cape Cod with the heavy snows west of the big cities. Snow to rain in NYC on Wednesday.

He may be right if the trend of losing a storm in the 3-5 day range only to bring it back closer to the event is to believed.

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He may be right if the trend of losing a storm in the 3-5 day range only to bring it back closer to the event is to believed.

Probably. I do agree with him on the GFS. When it comes to winter storms on the east coast 3-4 days out, this model doesn't have a clue. His argument is a very sound one in regards to the GFS.

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And wrong probably given the fact that no one knows what's going on with this storm. I really hate it when people make statements like "it will be snow to rain," or "it won't snow on the coast," or "the storm will go out to sea." There is no such thing as "it WILL" when it comes to snow forecasting several days out with zero consistency and a lack of consensus. Those are sensational and/or ignorant statements that no one should be giving any attention to.

If anything the situation has become more convoluted, not less. This is going to continue to bounce around especially with a lot fot his data not within the US sounding grid which is why these storm is slow/fast on various models.

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the inland runner is becoming less and less likely each model cycle with the further OTS solutions. The 12Z Euro will determine if we can further discount the inland solution from the possibilities. The controlling factor in this set up is how strong high pressure can build out of Canada prior to the storm making the turn in the SE up the coast. Almost impossible to determine at this point of course. I myself would rather see these OTS solutions then the constant inland runner coast hugger over amplified ones. - the high pressure in SE canada is crucial in this set up if you want snow.......

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From HPC. Summation = we dont know

GUIDANCE OFFERS A COMPLICATED SHORT RANGE MESS INTO MIDWEEK WITH

MUCH ABOVE NORMAL FORECAST SPREAD WITH POTENTIAL SRN STREAM STORM

DEVELOPMENT AND ASSOCIATED HEAVY PCPN POTENTIAL OUT FROM THE SERN

US AND UP/OFF THE EAST COAST INTO THU. UNCERTAINTY WITH UPSTREAM

KICKER ENERGY...CONVECTIVE FOCUS...AND NRN STREAM INTERACTION HAS

LEAD TO SIGNIFICANT TIMING AND SUPPRESSION ISSUES WITH THE STORM.

THE OO UTC ECMWF/UKMET/CANADIAN AND TO A LESSER EXTENT THE 00 UTC

GFS CONTINUE TO FAVOR A DEEPENING LOW TRACK MORE ON THE WESTWARD

PORTION OF THE ENTIRE SOLUTION ENVELOPE IN STARK CONTRAST TO THE

MORE SUPPRESSED 00 UTC NOGAPS AND 06 UTC GUIDANCE INCLUDING THE

NAM/DGEX AND ESPECIALLY GFS THAT IS LESS PROGRESSIVE WITH BOTH SRN

STREAM KICKER ENERGY AND LEAD LOW DEVELOPMENT. THIS ALLOWS NRN

STREAM FLOW TO BE MORE DOMINANT LEADING TO A FARTHER OFFSHORE

TRACK OF THE STORM. ECMWF ENSEMBLES HAVE BEEN

UNCHARACTERISTICALLY PROGRESSIVE THAN GFS ENSEMBLES ALOFT WITH

ENERGIES MOVING INTO AND OUT FROM THE MEAN EAST-CENTRAL US TROUGH

POSITION ALOFT CONSIDERING THE AMPLITUDE OF MEAN RIDGING CENETERED

OVER WRN NORTH AMERICA. 00 UTC ECMWF ENSEMBLES HAVE TRENDED

SLIGHTLY SLOWER THAN YESTERDAYS 12 UTC RUNS...BUT REMAIN ON THE

ERN PORTION OF THE SOLTUION ENVELOPE. OVERALL...PREFER TO

MAINTAIN HPC CONTINUITY AMID UNCERTAINTY WITH A SOLUTION STILL

PRIMARILY DERIVED FROM A 50-50 BLEND OF THE 00 UTC ECMWF AND

REASONABLY SUPPORTIVE 00 UTC GFS ENSEMBLE MEAN. HOWEVER...ANY OF

THESE SOLUTIONS REMAIN PLAUIBLE IN THIS SENSITIVE FLOW PATTERN AND

WE AWAIT 12 UTC GUIDANCE UPDATED INFO.

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