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Feb 3rd event


Brian5671

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Guy on the AccuWeather forum just posted a Euro map with 3-6" snow across almost all of Central/Northern NJ and NYC Metro/LI/Hudson Valley etc. He's got 14,000 posts, so I'm guessing he's not a troll and I like his comment of, "this ought to wake up this thread." Not sure if it's cool to link to another forum, so I didn't.

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Monday's h5 maps are almost identical to Feb 8 1994...its uncanny.

clearly the two winters share many similarities.

 

looks like Monday's storm could bring ~6" per the 00z EURO, and the improvements to the storm afterwards were also dramatic (though still icy). February may be NYC's snowiest month this winter, which would be impressive. 

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This time, yeah, because it falls in line with the general consensus. Euro doesn't right now

even though the euro has been shaky this winter and the nam occasional sniffs stuff out in the lr

 

i see that as a "red flag" that the general consensus is wrong.....

 

not to mention the srefs not agreeing with the nam makes it even more suspect imo

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Mount holly

THEN CONFIDENCE GETS EVEN LOWER SUN NIGHT INTO MON. STRONG HIGH

PRESSURE BUILDS OVER THE OH VLY ON MON. THE ECMWF, CMC AND NAM/WRF

ALL WANT TO DEVELOP A WAVE ON THE FRONT TO SOME EXTENT OVER SRN

PORTIONS OF THE AREA AND BRING IT EWD/NEWD. THE GFS, AS IT HAS

BEEN THE LAST FEW DAYS HAS A STRONGER HIGH AND BRINGS IT FURTHER E

AND IS, THEREFORE COMPLETELY DRY AS IT SUPPRESSES EVERYTHING

FURTHER S. ATTM, IT IS THE OUTLIER AND BEING IGNORED.

NONETHELESS, WITH THIS WINTER`S PENCHANT FOR LARGE HIGHS IT CAN`T

BE COMPLETELY RULED OUT. HOWEVER, WITH THE CONSENSUS SOLN BRINGING

A WAVE, WHICH WOULD IMPACT MAINLY SRN AREAS, HAVE KEPT CHC POPS.

THE ECMWF NOW HAS A MORE AMPLIFIED WAVE. THIS, IN TURN BRINGS THE

PRECIP FURTHER N. WILL WAIT TO SEE IF THAT TREND CONTINUES BEFORE

GOING IN THAT DIRECTION

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Latest disco from Upton. GFS tossed.

 

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
THE GFS IS THE ONLY MODEL NOT TO PRODUCE ANY PRECIPITATION OVER THE
AREA FROM SATURDAY NIGHT THROUGH TUESDAY...AND AS SUCH IS AN
OUTLIER...SO IT WAS NOT USED TO DETERMINE WEATHER AND POPS IN THAT
TIME FRAME. USED A BLEND OF THE GENERALLY MORE CONSISTENT
ECMWF/NAM/SREF/CMC INSTEAD.

SW FLOW ALOFT SATURDAY NIGHT...THE COMBINATION OF THE COLD FRONT
APPROACHING FROM THE N/W AND A PASSING 700 HPA SHORTWAVE WARRANT
CHANCE POPS EVERYWHERE BY THE OVERNIGHT HOURS. PERSISTENT LOW LEVEL
WARM ADVECTION SHOULD MEAN THE LOWS OCCUR IN THE EVENING HOURS AND
THEN TEMPERATURES SLOWLY RISE OVERNIGHT. THIS COUPLED WITH WARMING
LOW LEVEL THERMAL PROFILES...MEANS SHOULD MAINLY SEE LIGHT RAIN OVER
THE TRI-STATE SATURDAY NIGHT...EXCEPT FOR SOME POCKETS OF FREEZING
RAIN OVER ORANGE COUNTY UNTIL TEMPERATURES RISE TO ABOVE FREEZING
DURING THE EARLY MORNING HOURS. GIVEN LOW POPS AND SPOTTY NATURE OF
THE ZR - DO NOT HAVE CONFIDENCE TO REFER TO IN THE HWO AT THIS TIME.

FOR TEMPERATURES SATURDAY NIGHT...AS MENTIONED ABOVE...HAVE A
NON-DIURNAL TREND BASED ON A BLEND OF MAV/MET GUIDANCE WITH NAM AND
ECMWF 2-METER TEMPERATURES.

COULD SEE SOME SPOTTY LIGHT RAIN EARLY SUNDAY IN WAKE OF
AFOREMENTIONED PASSING 700 HPA SHORTWAVE...THEN SOME ISOLATED
SHOWERS WITH THE SLOW PASSAGE OF THE COLD FRONT SUNDAY AFTERNOON.

CLOUD COVER AND PRECIPITATION WILL LIMIT HIGH TEMPERATURES TO MAINLY
THE MID-UPPER 40S - A TAD COOLER IN HIGHER ELEVATIONS. THIS IS
CONSISTENT WITH A BLEND OF NAM AND ECMWF 2-METER TEMPERATURES WITH A
BLEND OF MAV/MET GUIDANCE AND MIXING DOWN FROM 950 HPA NEAR THE
COAST AND 925 HPA INLAND.

THERE ARE BEGINNING TO BE SOME INDICATIONS THAT A COASTAL LOW COULD
IMPACT AT LEAST SOUTHERN PORTIONS OF THE TRI-STATE FROM LATE SUNDAY
NIGHT INTO MONDAY. THE 00Z ECMWF IS BY FAR THE MOST AMPLIFIED WITH
THIS SYSTEM - AND LACKING SUPPORT FROM OTHER GUIDANCE SIDED MORE
WITH THE 12Z ECMWF/00Z NAM/00Z CMC WITH THIS SYSTEM. FOR NOW HAVE A
SLIGHT CHANCE OF SNOW AFTER MIDNIGHT SUNDAY NIGHT ACROSS THE
SOUTHERN 2/3 OF THE CWA...THEN A SLIGHT CHANCE OF SNOW ACROSS THE N
1/2 OF THE CWA AND A CHANCE OF RAIN/SNOW ACROSS THE S 1/2 MONDAY.
THIS IS DONE BY BLENDING NAM AND ECMWF LOW LEVEL THERMAL PROFILES.
IT SHOULD BE NOTED THAT IF THE COLDER NAM/CMC SOLUTION DO
VERIFY...WOULD EXPECT ALL SNOW FOR THE ENTIRE TRI-STATE. FOR NOW
THINK THAT ANY ACCUMULATIONS WOULD TOP OUT IN THE ADVISORY LEVEL
RANGE...HOWEVER IF THE MORE AMPLIFIED 00Z ECMWF ENDS UP PANNING
OUT...THEN COULD SEE SNOW TOTALS APPROACHING WARNING LEVELS.
CONFIDENCE IN THE LATTER IS NOT HIGH RIGHT NOW - 20 PERCENT OR LESS.
IT SHOULD BE NOTED...AGAIN...THAT THE GFS HAS NO PRECIPITATION
ACROSS THE AREA SUNDAY NIGHT/MONDAY SO CANNOT COMPLETELY RULE OUT
DRY CONDITIONS IN THAT TIME FRAME - BUT THE CONFIDENCE IN THIS IS
VERY LOW - 10 PERCENT OR LESS.

DEEP LAYERED RIDGING BUILDS IN MONDAY NIGHT AND TUESDAY - WITH
ASSOCIATED SUBSIDENCE KEEPING THINGS DRY.

 
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Latest disco from Upton. GFS tossed.

 

 

A good discussion, IMO.

 

The development of a wave along the front is quite different from the northern stream impulses on which the Euro has often struggled this winter. The ECMWF also has support. The idea that something could develop along the frontal boundary appears more likely than not. The details as to where it develops and tracks still have a lot of uncertainty.

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The Euro was really far north and amped up last night with 0.7"+ liquid that falls mostly as frozen precipitation across Northern NJ and NYC.

Indeed.  An outlier as of now given the GFS won't budge (but is being tossed in discussions), the GGEM is still about 50-100 miles South w/ the heavy stuff, the NAM is a whiff (but the NAM in the long range).  The only support you can somewhat see is the SREFs.

 

To me, the Euro is about to make a comeback this week.  It's started to do better this past weekend and I think the King may emerge the victor again by the end of next weekend.  While this event may not be AS amplified as the 0z, I'd be rather surprised to not see the other models trend towards it for Monday's event.  It's colder for the mid week as well, thinking that it sees the lower level cold better...

 

Time will tell.

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With southern stream driven storms the EURO notoriously does better than the GFS. So im more inclined personally to believe the euro or atleast give it good weight when blending models in a pattern like this. Yes i do know the EURO has been, no better way to put this..... a paper weight this winter but i feel this is its comfort zone.

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