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January Model discussion


UlsterCountySnowZ

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That southern Catskills bulls-eye has been a semi-permanent feature this winter (excluding this past weekends coastal event).  I can vouch for several feet of snow on the ground near the summits of Table and Peekamoose mountains on Sunday (3800+ feet).  Ducking under tree limbs that are normally well overhead.  Also small pockets of heavy glaze here and there (freezing rain, not rime, at least .5").  Very neat to come upon a small area, move quickly through it and then several minutes later hike through a similar area with heavy icing.  But you could count the acreage hit by ice storm on your fingers.  Pockets of colder air with no apparent rhyme (not rime) or reason.

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18 minutes ago, UlsterCountySnowZ said:

GFS + GGEM warm and cut... no dice on either, not even decent front end coating... 

You must be looking at a wrong run of GFS. 0z GFS 24 hour snow map at hour 138 on Pivotalweather shows a 2 to 4 inch snow event for central Jersey to NYC saturday night into sunday morning. 

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4 minutes ago, UlsterCountySnowZ said:

Referring to Tuesday/Wed event 

Ah ok. I think we all know that this weekend is our only real chance. The focus for a winter event is Saturday night into Sunday. Last several GFS runs have been consistently showing the area getting a few inches of snow. Hopefully we can squeeze out a snow event thanks to the strong high pressure. 

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Just now, winterwx21 said:

Ah ok. I think we all know that next week is a blowtorch without a chance. The focus for a winter event is Saturday night into Sunday. Last several GFS runs have been consistently showing the area getting a few inches of snow. Hopefully we can squeeze out a snow event thanks to the strong high pressure. 

Models will be all over the place the next 4-5 days imo, with a warm/cold boundary battle...that's why ensembles show warning snows in some spots, while ops shows either nothing or low end advisory... 

my current thinking is more of an ice/sleet threat atm, with high elevation and laditude seeing some front end snow. first wave looks good for city/Jersey while fringing northern folks... but again concensus is poor and models are all over the place with exactly where the boundary sets up... highly doubt we will have a lock on this at all... right down to nowcasting.

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1 hour ago, UlsterCountySnowZ said:

GFS with a complete 360 turn around from recent runs... takes both waves and instead cutting them, weakens them and pushes LP south of area2u6fv2v.jpg

 Sections of Upton's writeup. 

 

Area Forecast Discussion
National Weather Service New York NY
958 AM EST Tue Jan 10 2017
.LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
Unsettled weather with multiple fast moving systems expected to
impact the area through this time period.
The next chance of precipitation comes over the weekend, late
Saturday into Sunday as a wave of low pressure passes south of the
region. Latest 00z forecast guidance now showing low pressure
passing far enough south, and strong high pressure to the north, to
keep cold air locked in place for precipitation to remain all snow.
There are some timing issues between the GFS and ECMWF, however both
models are showing a low QPF event.

More precipitation moves into the region Monday and Tuesday as a
trough begins to move eastward. Temperatures gradually warm through
this time, however some precipitation may start off as a wintry mix
north and west of NYC before changing over to plain rain Monday
afternoon.

Mild temperatures Wednesday night and Thursday will return to either
near normal, or below normal behind the cold front late Friday,
Friday night through Sunday. Near normal to slightly above normal
readings are expected Monday and Tuesday as warm air moves back
northward.

 

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