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January 28-30th Possible Nor'easter


Rjay
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23 minutes ago, EasternLI said:

The gfs was not even close with this evolution. What's the final outcome going to be anyway? It hasn't happened yet. Curious to see how the 18z euro handles this too. 

This is one of the largest rug pulls I've ever seen on models the day of a storm.  

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I’m still reasonably optimistic I get 12” in Long Beach where I’ll be. But normally with a look like that aloft I’d be thinking 18”. Maybe we should get in a boat and head 500 miles east to go storm chasing later with the amount of energy this convection is supposed to steal. :axe: 

Im hoping it’s overdone but I’m not the one with the Ph.D to be able to tell one way or the other. 

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Final Call won't get too caught up in models and will only slightly tweak thoughts from earlier today/this has a lot of variability

Suffolk 12-24 (Isolated 24+ possible)

Nassau 10-15 (possibly higher with banding)

Brooklyn/Queens/Staten Island 8-12 (possibly higher with banding)

Bronx/Mahattan 6-10 (possibly higher with banding)

NW of NYC up to 287- 5-8 (possibly higher with banding)

287 to 84- 3-6 (possibly higher with banding)

North of 84 West of Hudson (1-3)- possibly higher with ratios

North of 84 East of Hudson- 3-6

 

 

 

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1 minute ago, Rmine1 said:

So in their 4:30 disco, Upton upped totals, at least for my area. Primarily due to better ratios. What are they not seeing? Honest question. Where’s Wdrag to share his experience 

If the winds really aren't a big deal this will be extremely high ratio snow from NYC on northwest where everyone will be in the teens.  

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Just now, HVSnowLover said:

If the winds really aren't a big deal this will be extremely high ratio snow from NYC on northwest where everyone will be in the teens.  

Yes agree, but there’s a “total miss/bust” camp that is gaining members it seems. 

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1 minute ago, Metasequoia said:

NE folks were hoping for a record breaking storm, so I guess 12 to 18 inches seems lame to them.

Yeah - that is why I actually just pulled my post. I misunderstood what they were saying. 

BOX AFD is all in however. Heck of write up. 

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8 minutes ago, HVSnowLover said:

Final Call won't get too caught up in models and will only slightly tweak thoughts from earlier today/this has a lot of variability

Suffolk 12-24 (Isolated 24+ possible)

Nassau 10-15 (possibly higher with banding)

Brooklyn/Queens/Staten Island 8-12 (possibly higher with banding)

Bronx/Mahattan 6-10 (possibly higher with banding)

NW of NYC up to 287- 5-8 (possibly higher with banding)

287 to 84- 3-6 (possibly higher with banding)

North of 84 West of Hudson (1-3)- possibly higher with ratios

North of 84 East of Hudson- 3-6

 

 

 

Snow blower's staged.  Central Rockland County, just an "inch" above 287.  Feel any banding could give us that potential boost beyond 8".  Glad it's not my working weekend....

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HIGHLIGHTS...

* WE NOW HAVE HIGH CONFIDENCE IN A HISTORIC MAJOR WINTER STORM FOR
 EASTERN NEW ENGLAND. WIDESPREAD 1 TO 2 FT SNOWFALL WITH LOCALIZED
 3 FT IS LIKELY FOR EASTERN MA AND RI ALONG WITH BLIZZARD
 CONDITIONS.
* SNOWFALL RATES COULD REACH 2 TO 4 INCHES PER HOUR AT TIMES DURING
 THE DAY ON SATURDAY WITH POSSIBILITY OF THUNDERSNOW ACROSS EASTERN
 MA AND RI.
* IN ADDITION TO POTENTIAL HISTORICAL SNOWFALL, STRONG WINDS UP TO
 HURRICANE FORCE ESPECIALLY ALONG THE COAST WILL LEAD TO BITTERLY
 COLD WIND CHILLS ON SATURDAY ALONG WITH MINOR TO MODERATE COASTAL
  FLOODING.   

DETAILS...

HEAVY SNOWFALL/EXTREME SNOWFALL RATES...

MODELS HAVE NOW COME INTO CONSENSUS FOR A HISTORICAL BLIZZARD TO
IMPACT EASTERN SOUTHERN NEW ENGLAND. EXPLOSIVE CYCLOGENESIS WILL
OCCUR OFF THE MID ATLANTIC COAST TONIGHT, WITH AN IMPRESSIVE 40 MB
PRESSURE DROP IN 24 HOURS AS A SURFACE LOW TRACKS FROM EAST OF THE
CAROLINAS TO THE 70W/40N BENCHMARK. FOR REFERENCE, A BOMB CYCLONE'S
CRITERIA IS A DROP OF 24 MB IN 24 HOURS. AT THIS POINT WITHIN 24
HOURS OF THE STORM, WE ARE NOW IN THE TIME FRAME WHERE THE NAM
GENERALLY PERFORMS WELL DURING AN EAST COAST CYCLOGENESIS EVENT.

WE NOW HAVE HIGH CONFIDENCE IN EXCEPTIONAL TO EXTREME SNOWFALL RATES   
WITH THE POSSIBILITY FOR THUNDERSNOW ACROSS EASTERN MA AND RI.   
SOMEWHAT LOWER CONFIDENCE IN THE EXACT PLACEMENT OF THE HEAVIEST   
BAND, HOWEVER. BOTH NAM AND GFS BUFKIT SOUNDINGS SHOW OVER 50 UNITS 

OF OMEGA COINCIDING WITH THE FAVORABLE SNOW GROWTH REGION. GIVEN   
THAT A DOUBLE BARREL LOW COULD DEVELOP WITH THE POTENTIAL FOR AN EYE-
LIKE FEATURE AT SOME POINT, WHEREVER THE MESOSCALE SNOW BAND SETS UP
COULD SEE 2 TO 4 INCHES PER HOUR SNOWFALL RATES WITH AN OUTSIDE
CHANCE FOR 5 INCHES PER HOUR ESPECIALLY WHEN ON THE BACKSIDE OF THE   
SYSTEM. IF A DEFORMATION BAND CAN PERSIST WHEN THE ARCTIC AIR
ARRIVES LATER IN THE DAY, SNOW TO LIQUID RATIOS (SLRS) COULD BE AS   
HIGH AS 20-25 TO 1. THEREFORE, WE FELT CONFIDENT ENOUGH IN THIS
FORECAST PACKAGE TO INTRODUCE AN AREA OF 24 TO 30 INCHES STORM TOTAL
SNOWFALL. IT IS POSSIBLE THAT THIS BAND COULD SET UP FURTHER WEST,
OR THERE MAY BE TWO BANDS OF HEAVY SNOW WITH LESSER AMOUNTS IN
BETWEEN. EITHER WAY, WE ARE CONFIDENT ENOUGH TO GO WITH A BLIZZARD
WARNING FOR THE POTENTIAL OF BLOWING AND DRIFTING SNOW WITH NEAR
ZERO VISIBILITY AT TIMES ACROSS MUCH OF EASTERN MA AND RI.

STRONG WINDS/BLOWING SNOW...  

WITH 925MB WINDS AT 65-70 KTS OR 4 TO 5 STANDARD DEVIATIONS ABOVE   
NORMAL ACCORDING TO GEFS AND NAEFS SITUATIONAL AWARENESS TABLE AND
COMBINED WITH EXCELLENT MIXING, THERE WILL BE HURRICANE FORCE WIND   
GUSTS AT TIMES ALONG THE IMMEDIATE COAST AND 50-60 MPH GUSTS FURTHER
INLAND. THIS WILL TRANSLATE TO WIDESPREAD DRIFTING AND BLOWING OF
SNOW WITH LOCALIZED SNOW DRIFTS OF UP TO 4 FT OR HIGHER. WITH
TEMPERATURES IN THE TEENS TO LOW 20S, WE HAVE HIGH CONFIDENCE IN
RATHER WIDESPREAD BLIZZARD CONDITIONS ACROSS EASTERN MA AND RI,
INCLUDING THE PROVIDENCE TO BOSTON CORRIDOR. BASED ON THE LATEST
GUIDANCE TRENDS, IT IS POSSIBLE THAT THE I-95 OR EVEN THE I-495 
CORRIDOR ENDS UP WITH A SECONDARY LOCAL SNOWFALL MAXIMA. THE SILVER
LINING IS THAT BECAUSE WE ARE DEALING WITH DRY POWDERY FLUFF, THERE
IS LESS OF A CONCERN FOR SNOW LOADING ISSUES EXCEPT FOR PARTS OF THE
OUTER CAPE AND NANTUCKET DUE TO THE COASTAL FRONT.

POWER OUTAGE POTENTIAL LOOKS TO BE HIGHEST ACROSS CAPE/ISLANDS,
WHERE THE WARMER TEMPS WOULD LEAD TO HEAVIER AND WETTER SNOW AND
CONSEQUENTLY HIGHER SNOW LOADING. WITH 70 MPH WINDS, POWER OUTAGES
WILL BE LIKELY.

THERE IS SOMEWHAT LOWER CONFIDENCE HOW FAR WEST THE HEAVY SNOW
OVERSPREADS AND THIS IS SOMETHING THAT WE CANNOT BE ENTIRELY SURE
UNTIL THE MESOSCALE BAND SETS UP AS THE STORM GETS GOING TOMORROW
MORNING. WHILE WE DO THINK THAT PLYMOUTH COUNTY IS STILL GOING TO
END UP WITH ONE OF THE HIGHEST TOTALS FOR THIS STORM, HOWEVER, THE 
SLRS MAY BE AFFECTED BY THE DENDRITIC GROWTH ZONE'S LESS THAN IDEAL
COINCIDENCE WITH THE BEST OMEGA RESULTING IN RIMING AND THE FACT
THAT THE HURRICANE FORCE GUSTS COULD BREAK UP DENDRITES.
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