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Upstate NY/North Country + adjacent ON, QC, VT: End of Fall/Into Winter!


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NW wind LES has to be some of the hardest stuff to predict. Anyone from Orleans to Oswego has a chance to hit max totals.

The NAM 4KM high res shows a 3 lake connection. Rates could be high.

nam4km_ref_us_11.png

I'm thinking Orleans-Monroe county special coming, we will see what the afternoon AFD says..

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That is a very robust band, with another building off of long point that will give the north towns one more quick shot. It would appear the core of that band has 3"/hr rates.

The airport is picking up signicant ground on Syracuse today in regards to seasonal totals! I

I'm hoping that front just crawls along but a subtle shift is showing up over the pennisula.

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That is a very robust band, with another building off of long point that will give the north towns one more quick shot. It would appear the core of that band has 3"/hr rates.

The airport is picking up signicant ground on Syracuse today in regards to seasonal totals! I

I'm hoping that front just crawls along but a subtle shift is showing up over the pennisula.

We had close to 5"/hr rates earlier now it's down to like 3-4"/hr. 6 inches so far since 12:30pm

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Do you guys remember when I quoted from the Buffalo Blizzard Book a couple of months back about how the winter of 1899-1900, a strong El Nino year, went on to be Buffalo's snowiest in 14 years, despite the latest first measurable snowfall on December 3, 1899? You guys broke that record this year and now look at all the snow you're getting! Similar patterns yield similar results!

 

Enjoy the snow! I have to say I'm jealous!

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Warning for rochester. 7 to 14. Bet those get bumped up later.

 

Off Lake Ontario...

Expect a band of lake enhanced snow to intensity late this afternoon

near Kingston Ontario. This band of snow will then merge with the

Arctic front and sweep east across the Eastern Lake Ontario region

this evening with a 1-3 hour period of heavy snow. This initial

burst of heavy snow will move east into the Adirondacks with the

Arctic frontal passage.

More pure lake effect snow will develop in the wake of the Arctic

front as winds become westerly over Lake Ontario and instability

deepens further. This band of snow will initially focus across the

Tug Hill plateau...then move south across Oswego County late tonight

with snow spreading into northern Cayuga and northeast Wayne

counties toward daybreak.

The combination of the lake enhanced Arctic front and lake effect

snow overnight will produce a general 3-5 inches across much of the

Eastern Lake Ontario region...with 6-10 inches across the Tug Hill

where lake effect snow initially develops. Late tonight southern

Oswego...northern Cayuga...and northeast Wayne counties get into the

heavier snow with 2-4 inches possible by daybreak.

Into the day Monday...upstream connections to Lake Huron and

Superior will increase the intensity/snowfall rates of the Lake

Ontario lake effect band. With the upstream connections and west-northwest

flow... expect the lake effect band will hug the southern shoreline

of Lake Ontario from about Orleans County across Monroe County

before moving inland across Wayne/northern Cayuga and far Southwest

Oswego County. Snowfall amounts will be highest across the far

north/northwest portions of Monroe County...Wayne County...northern

Cayuga and far Southwest Oswego counties... where 5 to 9 inches of

snow are likely through the course of the day. Lower amounts of 2 to

4 inches are expected across far northwest Orleans County.

With increasing confidence in the lake effect snow hugging the South

Shore of Lake Ontario Monday into Monday night (further discussed

below)... have adjusted headlines accordingly. Have upgraded Monroe

County to a lake effect snow warning... and posted a lake effect

Snow Advisory for Orleans County.

&&

Short term /Monday night through Thursday night/...

significant lake snows will continue east-southeast of both

lakes Monday night with a cold and moist background environment

persisting in the presence of still-significant lake-induced

instability...as lake induced equilibrium levels will remain at or above

10 kft for at least the first half of the night...before falling

below this level overnight. As for their location...a general

westerly to west-northwesterly flow will continue to direct the

most significant Lake Erie lake snows across the higher terrain of

the Chautauqua ridge...while the west-northwesterly flow across

Lake Ontario should steer the most significant lake snows across

the Monroe-northern Cayuga County corridor...with some of this

also affecting portions of Orleans County at times. In both of

these regions...additional accumulations of 5 to 9 inches will be

expected within the most persistent lake snows...while around the

periphery of these two main areas lower but still advisory-worthy

amounts will be likely across western Allegany and northern

Orleans counties...where lake effect snow advisories have been

issued. Compounding all this will be westerly surface winds of 15

to 30 miles per hour...which will lead to considerable blowing and drifting

snow.

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