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March 2- 4 Snowstorm Potential


NEG NAO

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Starting to already shove this southeast hour 108 and by hour 114 or 00z Monday night the heavy stuff is offshore.

 

The mean for NYC is going to about 0.6-0.7", perhaps a tenth or two wetter than the 00z mean.

I think given the origin of the system there will be a lot of liquid with it. I don't buy solutions that are very dry. I could see 1.50"+ liquid in a swath in the best overrunning area.

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I think given the origin of the system there will be a lot of liquid with it. I don't buy solutions that are very dry. I could see 1.50"+ liquid in a swath in the best overrunning area.

Agreed, I believe we'll see some NAM runs giving the area 30". It's that kind of storm where the high res will probably over due it a bit but they will have the advantage of picking up on where the heaviest banding will be.

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18z NAM starting to get into better range now, spitting out about 0.10"+ for Sunday night for the area. 0.25"+ for most of PA. 0.50"+ for Pittsburgh and points west.

It has cold air at the surface which sounds good based on the north wind direction. There would likely be a period of sleet/ZR to start before snow in this scenario.

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Based on current data, when will the worst of the storm be for NYC?

Banter: correct way to ask a question on americanwx.com for your first post ;)

Looks like it will be mainly a very early monday to some models lingering it into tuesday from slower ens. Members. Accumulation around NYC from what ive seen is around 10"+

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18z NAM starting to get into better range now, spitting out about 0.10"+ for Sunday night for the area. 0.25"+ for most of PA. 0.50"+ for Pittsburgh and points west.

 

0Z surface sunk south from North Jersey/NY border to Trenton/Staten Island from 12Z to 18Z for 3/3 0Z, in other words, a significant move south.  Forget where the line is given the range it's at, but is trend S from previous run to this.

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Banter: correct way to ask a question on americanwx.com for your first post ;)

Looks like it will be mainly a very early monday to some models lingering it into tuesday from slower ens. Members. Accumulation around NYC from what ive seen is around 10"+

 

One could argue that will be the "best" part of the storm, not the "worst".  :)

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Upton saying only light snow accumulations - but they say the qpf will be 1 inch ???

 

460  
FPUS51 KOKX 272017  
ZFPOKX  
 
ZONE FORECAST PRODUCT  
NATIONAL WEATHER SERVICE NEW YORK NY  
317 PM EST THU FEB 27 2014  
 
NYZ072-280930-  
NEW YORK (MANHATTAN)-  
317 PM EST THU FEB 27 2014  
   
    
SATURDAY NIGHT
 
CLOUDY. A CHANCE OF LIGHT SNOW AFTER MIDNIGHT.  
LOWS IN THE UPPER 20S. SOUTHWEST WINDS 5 TO 10 MPH...BECOMING WEST  
AFTER MIDNIGHT. CHANCE OF SNOW 40 PERCENT.    
SUNDAY
 
INTERMITTENT LIGHT SNOW. LIGHT SNOW ACCUMULATION. HIGHS IN  
THE LOWER 30S. CHANCE OF SNOW 80 PERCENT.    
SUNDAY NIGHT
 
PERIODS OF SNOW. ADDITIONAL LIGHT SNOW ACCUMULATION.  
LOWS AROUND 20. CHANCE OF SNOW 80 PERCENT.    
MONDAY
 
PERIODS OF SNOW. LITTLE OR NO ADDITIONAL SNOW  
ACCUMULATION.
COLD WITH HIGHS IN THE LOWER 20S. CHANCE OF SNOW  
80 PERCENT.    
MONDAY NIGHT
 
PERIODS OF SNOW. COLD WITH LOWS 5 TO 10 ABOVE.  
CHANCE OF SNOW 80 PERCENT. WIND CHILL VALUES AS LOW AS 5 BELOW.    
TUESDAY
 
PARTLY SUNNY. A CHANCE OF SNOW IN THE MORNING. HIGHS IN  
THE UPPER 20S. CHANCE OF SNOW 30 PERCENT. WIND CHILL VALUES AS LOW  
AS 10 BELOW IN THE MORNING.    
TUESDAY NIGHT
  

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Something I've noticed the past couple of days with this upcoming storm, are the features on the maps have been trending stronger. Not only has the high to the north been strengthening / pressing further south, but the southern vort  has been getting more consolidated as each run goes by. Can't wait till this system gets on shore, and is fully sampled. Don't be surprised if you see an uptick of qpf in future runs. That working in tandem with the1048mb high north of us i.e. higher ratios- mind you if this takes a favorable track, would cause higher snow totals than expected. By no means a forecast, but something that needs to be watched over the next couple of days.

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Upton saying only light snow accumulations - but they say the qpf will be 1 inch ???

 

460  

FPUS51 KOKX 272017  

ZFPOKX  

 

ZONE FORECAST PRODUCT  

NATIONAL WEATHER SERVICE NEW YORK NY  

317 PM EST THU FEB 27 2014  

 

NYZ072-280930-  

NEW YORK (MANHATTAN)-  

317 PM EST THU FEB 27 2014  

   

    

SATURDAY NIGHT  

CLOUDY. A CHANCE OF LIGHT SNOW AFTER MIDNIGHT.  

LOWS IN THE UPPER 20S. SOUTHWEST WINDS 5 TO 10 MPH...BECOMING WEST  

AFTER MIDNIGHT. CHANCE OF SNOW 40 PERCENT.    

SUNDAY  

INTERMITTENT LIGHT SNOW. LIGHT SNOW ACCUMULATION. HIGHS IN  

THE LOWER 30S. CHANCE OF SNOW 80 PERCENT.    

SUNDAY NIGHT  

PERIODS OF SNOW. ADDITIONAL LIGHT SNOW ACCUMULATION.  

LOWS AROUND 20. CHANCE OF SNOW 80 PERCENT.    

MONDAY  

PERIODS OF SNOW. LITTLE OR NO ADDITIONAL SNOW  

ACCUMULATION. COLD WITH HIGHS IN THE LOWER 20S. CHANCE OF SNOW  

80 PERCENT.    

MONDAY NIGHT  

PERIODS OF SNOW. COLD WITH LOWS 5 TO 10 ABOVE.  

CHANCE OF SNOW 80 PERCENT. WIND CHILL VALUES AS LOW AS 5 BELOW.    

TUESDAY  

PARTLY SUNNY. A CHANCE OF SNOW IN THE MORNING. HIGHS IN  

THE UPPER 20S. CHANCE OF SNOW 30 PERCENT. WIND CHILL VALUES AS LOW  

AS 10 BELOW IN THE MORNING.    

TUESDAY NIGHT  

Just being cautious/conservative in their official NWS forecast as this potential snowfall is three days out.  They talk about the 8" of snowfall in their Hazardous Weather Outlook if the favored models verify.

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Updated 3:54pm Upton

 

HWO UPDATED TO INCLUDE 8 INCH OR MORE POTENTIAL.

THE POSITION OF THE FRONT WOULD BRING IN N TO NE WINDS THRU THE
EVENT...FEEDING THE COLD AIR. A BLEND OF THE PURE GFS AND ECMWF
MODEL DATA GIVES TEENS TO LOWER 20S FOR HIGHS MON...AND TEMPS FROM
ZERO INTO THE LWR TEENS MON NGT. THIS DATA WAS ACCEPTED FOR THE FCST
WITH THE EXPECTATION THAT GUIDANCE LIKELY INFLUENCED BY CLIMO.

ANY DEVIATION TO THIS TRACK COULD LEAD TO SIGNIFICANTLY LESS PCPN IF
THE CONVERGENCE ZONE SETS UP S...OR TO MORE RAIN AND/OR ICY MIX IF
IT SETS UP FURTHER N.

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