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Possible Snowstorm December 8th-9th

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Post by aiannone Thu Dec 07, 2017 10:21 pm

syosnow94 wrote:
@aiannone wrote:RGEM coming in with a big hit

Great job holding the fort tonight kid.  Taking over in the big guys absence.  Wink

LOL, i should be studying, but ehh this is more important and more interesting than accounting lol
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Post by mikeypizano Thu Dec 07, 2017 10:23 pm

RGEM and 3km NAM I may see something... Its a start....
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Post by Guest Thu Dec 07, 2017 10:25 pm

I’m thinking as far as Long Island goes this is a classic north shore special. Hempstead turnpike north should do well. South shore near the still 50 degree ocean maybe some BL issues. Down there a 2-4” slopfest. Up here 4-6” kind of deal. Basically draw a line from Riverhead to Kennedy Airport and that’s your dividing line. We have a special micro-climate out here especially on early winter storms. Thoughts?

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Post by nutleyblizzard Thu Dec 07, 2017 10:39 pm

GFS at hr 36 is closer to the coast near OBX.
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Post by Snow88 Thu Dec 07, 2017 10:41 pm

0z GFS is further west and has a bigger precip shield
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Post by jmanley32 Thu Dec 07, 2017 11:04 pm

all models so far on 00z are on board for a advisory level to warning level snow depending, what a flip.
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Post by SENJsnowman Thu Dec 07, 2017 11:30 pm

Track, Skins, anyone else on the Coast:

Good news out of Mt Holly in their 9 pm update!

.LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/...
900 PM...Updated temperature, PoPs and weather grids for the
Friday night-Saturday event. Will hold off on making changes
the snowfall accumulations until the mid shift gets a complete
look at the 00Z guidance that comes in later tonight.

The biggest difference with the evening update was to increase
PoPs
late Friday night and Saturday (most notably from the I-95
corridor/Delaware Valley, south/east
) with increasing NWP
support for the occurrence of measurable precip across this part
of the forecast area.

The precipitation type should be snow for the bulk of the
event. The exception will be coastal locales near the
ocean/Delaware Bay where mixing will play a factor in limiting
snowfall accumulations (evident in probability of frozen
precipitation fields for the last several runs of NAM/NAM nest).

Yes, models have trended westward/wetter over the since last
night with 12Z/18Z model consensus painting one-half to one-inch
of QPF for areas just to the east of I-95
. However, a steadfast
10:1 snow ratio should not be valid in the coastal plain given
a marginally warm surface and the potential for considerable
riming to take place (more likely between 5:1 and 8:1 in the
coastal plain for this event).



The one thing they say that I don't really buy is the 5:1 or 8:1 ratios.[/b]

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Post by Snow88 Thu Dec 07, 2017 11:44 pm

Ukie has a 999 low very close to the NJ coast at 42 hours and then 996 low right on the benchmark at 48 hours

Further west than the 12z run
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Post by Snow88 Thu Dec 07, 2017 11:56 pm

Ukie has about 6 + inches of snow for o NYC area

The track is great for the NYC area
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Post by Frank_Wx Thu Dec 07, 2017 11:58 pm

Wow. Game on.

Possible Snowstorm December 8th-9th - Page 14 IMG_0566.GIF.f6c9264de7e3360d2b83b840ae0d427f

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Post by SoulSingMG Fri Dec 08, 2017 4:20 am

URGENT - WINTER WEATHER MESSAGE
National Weather Service New York NY
407 AM EST Fri Dec 8 2017

NJZ002-004-006-103>108-NYZ068>074-082100-
/O.CON.KOKX.WW.Y.0001.171209T1100Z-171210T0600Z/
Western Passaic-Eastern Passaic-Hudson-Western Bergen-
Eastern Bergen-Western Essex-Eastern Essex-Western Union-
Eastern Union-Putnam-Rockland-Northern Westchester-
Southern Westchester-New York (Manhattan)-Bronx-
Richmond (Staten Island)-
407 AM EST Fri Dec 8 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM SATURDAY
TO 1 AM EST SUNDAY...

* WHAT...Snow expected. Plan on hazardous travel conditions.
Total snow accumulations of 2 to 4 inches are expected.

* WHERE...Portions of northeast New Jersey and southeast New
York.

* WHEN...From 6 AM Saturday to 1 AM EST Sunday. Highest snow
accumulation should occur Saturday morning into Saturday
evening.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities at
times.
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Post by rb924119 Fri Dec 08, 2017 5:12 am

06z suites back west/more expansive with the precipitation shield

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Post by Carter bk Fri Dec 08, 2017 6:10 am

Most mets are calling 1-3 looks like most is in for 4" lower than the hudson

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Post by rb924119 Fri Dec 08, 2017 6:11 am

HOLY 06z GFS ENSEMBLES!! WARNING CRITERIA SNOW FOR ALL OF THE I-95!!!

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Post by skinsfan1177 Fri Dec 08, 2017 6:33 am

WowPossible Snowstorm December 8th-9th - Page 14 5a2a7710
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Post by jmanley32 Fri Dec 08, 2017 6:39 am

@rb924119 wrote:HOLY 06z GFS ENSEMBLES!! WARNING CRITERIA SNOW FOR ALL OF THE I-95!!!
you think the winter weather advisory could be upgraded? Seems ecven operational gfs was near 6+. What a nice surprise all this is! Even a wwa is better than we have seen in Dec in a while.
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Post by track17 Fri Dec 08, 2017 6:43 am

Jman I know they gave us down here a watch. Sure you guys will follow

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Post by jmanley32 Fri Dec 08, 2017 6:48 am

Yeah it may actually be that you guys get more being you sick out a bit more I'm bit further west. But 06z gefs was .75 to 1.0 plus qpf holy smokes is right rb! It all seems to still be expanding west. Big 12z and 00z runs today!
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Post by amugs Fri Dec 08, 2017 6:48 am

NWS
Possible Snowstorm December 8th-9th - Page 14 StormTotalSnowWeb1
Possible Snowstorm December 8th-9th - Page 14 StormTotalSnowWeb1

AND THE GEFS JU ST JUMPED 40 MILES WEST MOTHER OF LOVE!! Would be warning for level storm!!
Possible Snowstorm December 8th-9th - Page 14 5a2a6ccf5da3e_ScreenShot2017-12-08at5_43_11AM.png.0cdbfabd0e773e25605f463c50594b28

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WINTER 2015-16 Total - 29.8" (Avg 35")
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Post by amugs Fri Dec 08, 2017 6:55 am

The mean wowza

Possible Snowstorm December 8th-9th - Page 14 Gfs-ens_apcpn_eus_11


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Post by sroc4 Fri Dec 08, 2017 7:36 am

Great discussion from Upton this morning:

Confidence has continued to increase regarding our first
accumulating snowfall event across the Tri-State Saturday into
Saturday evening. Dprog/Dt trends in the models over the last 24
hours or so are quite impressive with increased amplification of the
upper jet over the northeast/New England as well as with the overall
amplification of the middle and upper level trough across the
eastern States. These trends are going to lead to an organizing low
pressure system over the southeast States tonight that will
gradually strengthen as it moves up the coast on Saturday south and
east of Long Island. Initially the low develops from southern
stream energy across the southeast, but another piece of energy
in the northern stream will help amplify the middle/upper trough
and thus intensity the low as it passes near or just to the
east of the 40N/70W benchmark. The low quickly lifts off the New
England coast Saturday night as the upper trough slides
overhead.

Models have come into much better agreement with the expanse of the
precipitation shield as well as the overall timing.
Increasing lift begins late tonight as the upper jet amplifies to
speeds close to 200 kt across New England. The region will lie near
the right entrance region of this upper jet core bringing large
scale lift and eventually precipitation. The lower levels initially
are going to be dry, so evaporative cooling will have to take place
to get precip to the surface. Temperature profiles are
supportive of all snow at the onset early Saturday morning.
There remains some uncertainty on how quickly the lower levels
saturate, but should see light snow overspread the region from
south to north around or just after sunrise Saturday.

Accumulating snow is expected to continue for much of the day as the
upper jet provides excellent lift in combination with some weak
thermal forcing as the low passes to the south and east of Long
Island in the afternoon and evening. The main concern regarding
temperatures is with the surface layer. While there is no arctic
high pressure to the north, the air is sufficiently dry at the
start to allow the lower levels to cool. As some warmer aloft
advects northward, temperatures aloft will warm slightly but
should stay below 0C. The only concern for any warm nose at this
type would be across the east end of Long Island, where some
models indicate the 0C line at 850 inching close for a few hours
in the afternoon/evening. Some locations may see temperatures
rise just above freezing in the afternoon, but this should not
impact PTYPE except for the Forks of Long Island where
temperatures could reach the middle 30s. Some rain could mix in
there. The snow gradually tapers off from west to east this
evening. Forecast soundings show some drying aloft which may
switch snow growth to less dendrites and more needles, limiting
snow accumulation.

A winter weather advisory has been issued for all zones except
Orange County. Total snowfall accumulations range from 1 to 3 inches
across Orange County, 2 to 4 inches for the rest of the Lower Hudson
Valley, NE NJ, and Manhattan, Bronx, and Staten Island. For
Queens, Brooklyn, Long Island, and southern Connecticut, totals
range from from 4 to 6 inches.

While confidence is high on the above scenario, slight shifts in the
track of the storm could lower or increase snowfall
accumulations. A shift west with the low track could introduce
some mixing with rain across eastern Long Island and southeast
Connecticut. The latest experimental High End Amount shows a 1
in 10 chance for warning level snowfall from the Hudson River
corridor on east. Snow to liquid ratios may range from 8:1 to
10:1 with this event and could be a bit lower across the
southeast coast of Long Island.

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WINTER 2012/2013 TOTALS 43.65" WINTER 2013/2014 TOTALS 64.85"
WINTER 2014/2015 TOTALS 71.20" WINTER 2015/2016 TOTALS 35.00"
WINTER 2016/2017 TOTALS 42.25" WINTER 2017/2018 TOTALS 62.85"
WINTER 2018/2019 TOTALS 14.25" WINTER 2019/2020 TOTALS 6.35"
WINTER 2020/2021 TOTALS 37.75"
Dec 16th/17th 7.25"    
Jan 31st-Feb 3rd 15.5"    
Feb 7th 6"
Feb 10th-11th 2.75"
Feb 18th-19th 6.25"
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Post by jmanley32 Fri Dec 08, 2017 7:37 am

@amugs wrote:The mean wowza

Possible Snowstorm December 8th-9th - Page 14 Gfs-ens_apcpn_eus_11

is that nearly 6-12 for most? and the mean that means some ensembles were actually higher? but how many compared to how many lower. still this is all getting me fired up for winter for sure.
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Post by skinsfan1177 Fri Dec 08, 2017 7:38 am

Does anyone have first predictions for central New Jersey coast totals
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Post by mikeypizano Fri Dec 08, 2017 8:13 am

wunderground and AccuWeather have me in a coating to an inch.
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Post by Snow88 Fri Dec 08, 2017 8:33 am

JB is going with 6-10 for the I-95 corridor
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