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March 2- 4 Snowstorm Potential


NEG NAO

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Considering the euro has been spot on this season and consistent with this storm solution the last few runs I would say hug the euro, throw the GFS, once again.

Spot on this season? Not even close. It was the only model that kept saying we were gonna get a moderate snowstorm today (Wednesday), a huge blunder. Euro has not been great at all this season.

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Considering the euro has been spot on this season and consistent with this storm solution the last few runs I would say hug the euro, throw the GFS, once again.

Nothing has been spot this year. But I hate going against the Euro. It hasn't been great by any means though. I'm going with the Euro Ens and gefs in this time frame.

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Yeah, it turned around at hour 96 or 102 I think to yield a slightly colder solution. QPF is more substantial, so it may have been a case of stronger WAA leading to higher temps at the onset, which were quickly compensated for.

Nice 0z suite. The PV being more consolidated helped push this further south. The PV is still further north on the Euro than the other models. Let's see what tomorrow brings.

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The Euro has 6 plus inches at KNYC  thru CNJ  I don`t buy the 10 you see on the WB  maps from this solution  , remember it counts Sleet .( but that's a great improvement from 12 hours earlier ) .

But the amount does not  matter because at 12z  there was only  2 inches  thru CNJ into KNYC . '

The last 3 runs of the Euro

0z Yesterday - had temps in the teens on Monday with a widespread snow

12z Yesterday - had KNYC close to 40 while most of the precip fell , then crashed temps at 132 and the snow maps showed  2

0z  today is  6 plus  ( the other stuff it adds is suspect ) .

So the Euro is having a problem with the strength of the SW and the depth of the confluence . The OP is all over the place .

 

Take away the GFS  and the Canadian are continuing to advertise a wider spread winter storm and the Euro has ticked towards their camp this morning . Don't take 1 OP run as gospel , lets see the Euro settle down before we run with it`s numbers .  The GFS and GGEM have been steady , as long as we don`t lose them, I think the Euro may be headed in their direction .

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UPTON is getting concerned:

from upton...MODELS HAVE COME IN BETTER AGREEMENT ON A POTENTIALLY SIGNIFICANT

STORM WHICH SHOULD IMPACT THE AREA FROM SUNDAY NIGHT THROUGH MONDAY

NIGHT. THE ECMWF HAS TRENDED FARTHER OFFSHORE WITH ITS SURFACE

LOW...AND ALSO TOWARDS A COLDER LOW LEVEL THERMAL PROFILE...MORE IN

LINE WITH THE CMC AND GFS. THERE IS NOW A GENERAL CONSENSUS THAT

THE SURFACE LOW WILL PASS NEAR THE 40N/70W BENCHMARK LATE MONDAY.

AS A RESULT...HAVE TRENDED THE FORECAST TOWARDS THE COLDER CMC/GFS

SOLUTIONS. ALSO...GIVEN THAT THE STORM IS 4-5 DAYS AWAY...HAVE KEPT

P-TYPES SIMPLE - RAIN...SNOW...OR RAIN AND SNOW AS TOO MUCH COULD

CHANGE BETWEEN NOW AND THE ARRIVAL OF THE STORM TO TRY TO PINPOINT

WHERE AND WHEN SLEET AND POSSIBLY EVEN FREEZING RAIN COULD COME

INTO PLAY. NOTING THAT THE ECMWF IS PLAYING CATCH UP TO THE GFS AND

CMC WITH THE STRENGTH OF THE ARCTIC HIGH BUILDING DOWN INTO THE

PLAINS AND EXTENDING EASTWARD INTO THE NE AHEAD OF THIS

SYSTEM...BELIEVE THE ECMWF HAS TOO MUCH LOW LEVEL WARM AIR AT THE

START...SO EXPECT PRECIPITATION TO DEVELOP SUNDAY NIGHT MAINLY AS

ALL SNOW...EXCEPT FOR POSSIBLY A MIX WITH RAIN RIGHT AS IT STARTS

SUNDAY EVENING. SNOW IS THEN EXPECTED TO CONTINUE THROUGH

MONDAY...POSSIBLY MIXING WITH RAIN ALONG THE S FORK OF LONG ISLAND

MONDAY AFTERNOON...THEN TAPER OFF FROM W TO E MONDAY NIGHT. IF THERE

WHERE TO BE ANY MIXING IN OF SLEET OR FREEZING RAIN...THIS WOULD

MOST LIKELY OCCUR DURING THE DAY ON MONDAY...DEPENDING UPON EXACTLY

HOW FAR N THE LOW LEVEL WARM TONGUE GETS.

EVEN WITH ALL THE UNCERTAINTY THERE IS THE POTENTIAL FOR A

SIGNIFICANT SNOWFALL ACROSS MOST IF NOT ALL THE CWA FROM SUNDAY

NIGHT THROUGH MONDAY NIGHT AND WILL HIGHLIGHT THIS THREAT IN THE

HWO. DEPENDING ON THE EXACT STRENGTH AND POSITION OF THE HIGH AND

LOW...THERE IS ALSO THE POTENTIAL FOR GUSTY WINDS WITH THIS STORM.

AT THIS TIME...THOUGH IT LOOKS LIKE WINDS WILL LIKELY BE BELOW ADVISORY LEVELS

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The 06z gfs actually looks considerably colder than 0z, and it would drop us into the teens and lower 20s during the storm, this PV and arctic push is no joke.

Almost looks like one of those arctic waves we've seen earlier this season and could suggest high ratio snows believe it or not.

yea and looks like there will be little winds as well so dare I say maybe some ratios of 12:1 or better with temps in the teens/lower 20's during the heaviest stuff?

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Cobb Method Snowfall for the last two GFS runs is about 8" (for NYC) SNOW, with no rain indicated. 06Z was indeed colder at surface. I want to also note that low temps. are forecast on this same output in post storm timeframe 3/4--9degs., 3/5--2degs., 3/6--10degs. We will have to see about that! 2degs. would be lowest ever for March @CPK.

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