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March 13 - 15 Major Winter Storm Potential


NEG NAO

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Just now, weatherpruf said:

I don't think you are bullish on CNJ and I am taking you seriously and tempering my hopes. The models are not showing an epic snowstorm for us 6-12 isn't epic. I'm a little more worried about wind and heaviness of sleet infested snow when cleaning up. The folks further north this is your storm. I'll be happy if we get 8-12 here.

I am not nor have I been bullish on CNJ. I've always believed NNJ/Seny/Greater New England will land this big dog.

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ROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
522 PM EDT MON MAR 13 2017

VALID 00Z TUE MAR 14 2017 - 00Z FRI MAR 17 2017


DAYS 1-3...

FORECAST CONFIDENCE REMAINS HIGH LOW PRESSURE DEVELOPING ALONG THE
SOUTHEAST COAST MON EVENING WILL DELIVER WIDESPREAD MODERATE TO
HEAVY SNOWS TO PORTIONS OF THE INTERIOR MID ATLANTIC AND NORTHEAST
AS IT TRACKS NORTH ALONG THE COAST TUE-WED.  WARM AIR WRAPPING IN
NORTH OF THE SYSTEM MAY HAMPER AMOUNTS ALONG THE COASTAL
PLAIN...INCLUDING THE I-95 CORRIDOR.

MID-LEVEL ENERGY EMANATING FROM THE PACIFIC IS NOW DIVING INTO THE
SOUTHEASTERN U.S....WHERE IT IS FORECAST TO BEGIN PHASING WITH
SUBTROPICAL ENERGY LIFTING OUT OF THE NORTHERN GULF OF MEX.  BY
EARLY TUE THIS PHASED ENERGY IS EXPECTED TO BEGIN LIFTING
NORTH...ASSUMING A NEGATIVE TILT AHEAD OF A NORTHERN STREAM LOW
CLOSING OFF OVER THE UPPER GREAT LAKES.  MODELS SHOW THE SHORTWAVE
LIFTING RAPIDLY TO THE NORTH ALONG THE MID ATLANTIC TO THE
NORTHEAST BY LATE TUE...GRADUALLY PHASING WITH THE NORTHERN STREAM
LOW AS THE LOW DRIFTS EAST.  AT THE SURFACE...LOW PRESSURE
ORGANIZING ALONG THE SOUTHEAST COAST MON EVENING WILL BEGIN TO
RAPIDLY DEEPEN AS IT TRACKS NORTH ALONG THE MID ATLANTIC COAST
EARLY TUE BEFORE REACHING THE SOUTHERN NEW ENGLAND COAST BY TUE
EVENING.  MOST OF THE GUIDANCE SHOWS THE SURFACE LOW PRESSURE
DROPPING INTO THE UPPER 970S AS IT APPROACHES EASTERN LONG ISLAND
AND SOUTHEASTERN NEW ENGLAND TUE AFTERNOON-EVENING. 

WITH THE GFS AND ECMWF MOVING INTO GOOD AGREEMENT WITH THE TRACK
OF THE LOW...WPC
PREFERRED A COMPROMISE BETWEEN THEIR THERMAL PROFILES THROUGH DAY
1 (ENDING 00 UTC WED)...WHICH WOULD SUPPORT MODERATE TO HEAVY SNOW
NORTH AND WEST OF THE I-95 CORRIDOR FROM DC TO COASTAL MAINE.  WPC
PROBABILISTIC GUIDANCE SHOWS A HIGH RISK FOR ACCUMULATIONS OF A
FOOT OR MORE ACROSS SOUTH-CENTRAL TO NORTHEASTERN PA...NORTHERN
NJ...THE CATSKILLS AND HUDSON VALLEY REGION OF UPSTATE
NY...NORTHERN CT...WESTERN AND CENTRAL MASS AND SOUTHERN NH AND
VT.   MARGINAL LOW LEVEL/BOUNDARY LAYER TEMPS ARE LIKELY TO KEEP
AMOUNTS IN CHECK...WITH A TIGHT GRADIENT FURTHER TO THE SOUTH AND
EAST.  SEVERAL GUIDANCE MEMBERS HAVE SHOWN A SLIGHT SHIFT TO THE
WEST WITH THE LOW TRACK..WITH WARMER AIR WRAPPING FURTHER INLAND. 
MIXED PRECIPITATION NOW APPEARS MORE LIKELY ALONG AND SOUTH AND
EAST OF THE I-95 CORRIDOR FROM DC TO BOS.  HI-RES ENSEMBLE
GUIDANCE SHOW SIGNIFICANT PROBABILITIES FOR A CHANGEOVER TO MIXED
PRECIPITATION (SNOW/SLEET) ALONG THE I-95 CORRIDOR FROM NORTHERN
VA TO SOUTHEASTERN PA TUE MORNING AND THEN ACROSS SOUTHERN
NJ...CENTRAL AND EASTERN LONG ISL INTO SOUTHEASTERN NEW ENGLAND AS
THE STORM TRACKS FURTHER NORTH.  OF COURSE...FORECAST CONFIDENCE
REMAINS LIMITED...WITH ANY SHIFT IN THE LOW TRACK LIKELY TO RESULT
IN A SIGNIFICANT SHIFT IN THE TRANSITION ZONE.

BY DAY 2 (ENDING 00 UTC THU)...THE HEAVIEST SNOW ACCUMULATIONS ARE
EXPECTED TO CENTER ACROSS NORTHERN NEW ENGLAND...PARTICULARLY
ACROSS NORTHERN MAINE WHERE PROBABILISTIC GUIDANCE SHOWS A HIGH
RISK FOR ACCUMULATIONS OF A FOOT OR MORE.  IN ADDITION TO THE
SYNOPTICALLY DRIVEN SNOW...STRONG NORTHERLY TO NORTHWESTERLY
SNOW ON THE BACKSIDE OF THE SYSTEM IS EXPECTED TO ENCOURAGE
DEVELOPING LAKE-EFFECT SNOWS...BOLSTERING AMOUNTS ACROSS PORTIONS
OF WESTERN NY. 

BY DAY 3...WITH THE LOW TRACKING INTO ATLANTIC CANADA...SNOWS WILL
BE LIMITED TO SOME LIGHT AMOUNTS IN THE WRAPAROUND AND SOME
LINGERING LAKE EFFECT.

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1 minute ago, Rtd208 said:

I am certainly riding close to the line here, I still expect a minimum of 14" with up to 18" possible and then some sleet accumulation but I don't think much higher or lower then those numbers at least for my area.

I don't think so RT I think we are going to be a bit let down on this one, but what can you do. There is sound reasoning to think sleet is going to cut down those totals, it's a question of how much. This is what I am getting from reading here.

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5 minutes ago, Rtd208 said:

I am certainly riding close to the line here, I still expect a minimum of 14" with up to 18" possible and then some sleet accumulation but I don't think much higher or lower then those numbers at least for my area.

You're in Edison/Metuchen, right? Im down the block. I'm on that borderline of hoping for 15" but with what Ive been seeing today, realistically expecting 8-12. Who knows right now. 

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Just now, swamplover56 said:

Please read what sacrus just posted post less and stop bittercasting

Well what I saw from Sacrus indicates the NWS now sees sleet cutting down totals for a large portion of us, or maybe not. We have some pros here saying the same thing. I'm just east of the NJ tpk and if sleet is gonna get north of Monmouth ( and it looks that way ) then we're going to lose some significant inches. How much is in question.

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Just now, weatherpruf said:

Well what I saw from Sacrus indicates the NWS now sees sleet cutting down totals for a large portion of us, or maybe not. We have some pros here saying the same thing. I'm just east of the NJ tpk and if sleet is gonna get north of Monmouth ( and it looks that way ) then we're going to lose some significant inches. How much is in question.

It says they are weighing the gfs heavily

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I'm in Massapequa. I expect it to switch to straight heavy rain during the day tomorrow. Most of southern Nassau and JFK are going to switch. I've never seen a bombing low so close to coast, not give those areas atleast sleet in these situations. 

I still remember being outside making a snowfort at noon on December 30, 2000 and being surprised at how instantaneous the precip switched from heavy snow to freezing rain. It was mere seconds. 

The midlevels are going to be above freezing for atleast two hours tomorrow for most of the Metro (excluding neighborhoods north of Central Park and east of the Hudson. 

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Just now, WaPo said:

I'm in Massapequa. I expect it to switch to straight heavy rain during the day tomorrow. Most of southern Nassau and JFK are going to switch. I've never seen a bombing low so close to coast, not give those areas atleast sleet in these situations. 

I still remember being outside making a snowfort at noon on December 30, 2000 and being surprised at how instantaneous the precip switched from heavy snow to freezing rain. It was mere seconds. 

The midlevels are going to be above freezing for atleast two hours tomorrow for most of the Metro (excluding neighborhoods north of Central Park and east of the Hudson. 

I have seen that too. Like a switch was flipped. Thing is, you need to clean the snow you have before it gets saturated, or face serious health consequences if you are of a certain age. And that drives me nuts. I'd like to get an idea of when the switch will take place, in my area to sleet.

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Just now, weatherpruf said:

I have seen that too. Like a switch was flipped. Thing is, you need to clean the snow you have before it gets saturated, or face serious health consequences if you are of a certain age. And that drives me nuts. I'd like to get an idea of when the switch will take place, in my area to sleet.

Watch dual-pol radar tomorrow to get an idea of that.

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1 minute ago, JetsPens87 said:

Watch dual-pol radar tomorrow to get an idea of that.

Thanks for that. You are actually giving people useful information. While it is fun to track storms, there are also some serious precautions that must be taken. Snowblowers don't work well with sleet and shoveling sleet or soaked snow can cause back injuries and worse.

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