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KBUF AFD about the storm - KROC could be jackpot area - Sat 2-4, Sat ngt - 8-16, Sun 3-6+

Light snow will spread into Western NY Saturday morning as warm air
advection and isentropic lift move into the region. Light easterly
winds and temperatures in the mid to upper teens to low 20`s will
result in a light snowfall that accumulates slowly throughout the
morning. Light snow will then spread into Saturday afternoon while
snow intensifies slowly across Western NY. Saturday will be
uneventful with minor accumulations of 2-4 inches across WNY to 1-3
inches east of Lake Ontario.

Although there continues to be spread in the speed of phasing and
the track, the spread is getting smaller. A beautiful coupled upper-
level jet will promote rapid deepening as low pressure moves into
the northern Mid-Atlantic region Saturday night. At this time, mid-
level frontogenesis will have moved into western and north-central
NY, moving east of the region Sunday. This will promote deep lift in
the dendritic growth zone for much of the region. Northeast winds
will also increase overnight and will produce lake enhancement along
the southern shore of Lake Ontario during this time. The open waters
of Lake Ontario are still in the upper 30`s to low 40`s. This is
more than enough to produce increased instability and additional
snow totals. Winds will be increasing to 20 to 25 mph with gusts
near 40 mph along the southern shore of Lake Ontario with gusts near
35 mph across the Niagara Frontier and Lake Erie shoreline. Winds
will be lower across interior portions of NYS. Snow rates will
likely be 1 in/hr with the potential for higher rates where
enhancement is likely. Snowfall accumulations of 8 to 16 inches are
possible overnight.

Winds will start to back to the northeast Sunday morning and cold
air advection will spread across the eastern Great Lakes through the
day. The heavy widespread synoptic snow will move east of western NY
Sunday morning and will move east of the North Country by Sunday
afternoon. Snow will transition to lake effect during this time with
gusty winds and areas of blowing and drifting snow. Snow
accumulations of 3 to 6 inches are possible Sunday with the higher
amounts along the southern shore of Lake Ontario and across the
higher terrain. The Tug Hill region will also see enhancement from
upslope conditions.

Temperatures will take a tumble Sunday and Sunday night with highs
in the single digits to low teens and near zero to the minus teens
across the North Country Sunday night. Wind chills will go below
zero early Sunday morning and fall through the day on Sunday. Wind
chills will likely approach minus 20 across WNY and minus 40 across
the North Country by Monday morning.

As mentioned above, confidence has increased that a major winter
storm will impact western and north-central NY this weekend, however
there remains uncertainity as to where the heaviest snow axis will
be and how wide it will be. With this, will continue to message the
Winter Storm Watch Saturday afternoon through Monday afternoon.
Possible (total) snow accumulations during this time range from 12-
18 inches with 18-24 inches along the southern shore of Lake Ontario
and across the southern Tug Hill region.
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Just now, Thinksnow18 said:

I'm not worried about the NAM. At this point everything looks to be locking in...the numbers discussed in the AFD look great and I'm getting psyched for hefty accums.

If we see a foot from this I think it’d be a huge win. Anything more is gravy. Anything less than 8” at this point is a bust in my eyes. 

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Just now, Thinksnow18 said:

Nice!!! That's really great news and further solidifies a more northern shift 

Yep, though the northern suburbs probably wouldn't mind another bump north. As of right now the northern suburbs are looking at 2-4", Downtown Toronto and west to Hamilton 4-6" and Hamilton-Niagara 6-10" 

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3 minutes ago, mississaugasnow said:

Winter Storm watches up for portions of the GTA. Looking around 6-10" here which I will gladly take because this winter has been awful. 

What is Toronto’s yearly average snowfall?  Being on the wrong end of Lake Ontario and not in a favorable synoptic location it’s probably fairly low.

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Just now, CNY_WX said:

What is Toronto’s yearly average snowfall?  Being on the wrong end of Lake Ontario and not in a favorable synoptic location it’s probably fairly low.

About 51" We have a climate similar to Detroit/Chicago. Most of our big storms are terrible for about 90% of this sub because they cant transfer to coast and generally have to pass right over Rochester. 

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Haven't had a forecast like this for a while!

Tonight
Snow, mainly after 2am. Low around 20. South wind 6 to 8 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.
Friday
Snow, mainly before noon, then a chance of snow showers after noon. High near 34. South wind 7 to 10 mph becoming west in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Friday Night
A chance of snow showers before 10pm, then scattered flurries between 10pm and 1am. Mostly cloudy, with a low around 9. Northwest wind 7 to 10 mph becoming northeast after midnight. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Saturday
Snow, mainly after 1pm. High near 17. Northeast wind 5 to 7 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
Snow. The snow could be heavy at times. Low around 8. East wind 8 to 11 mph. Chance of precipitation is 100%.
Sunday
Areas of blowing snow. High near 12. Chance of precipitation is 100%.
 
Sunday Night
Snow. Areas of blowing snow before 4am. Low around -5. Chance of precipitation is 90%.
M.L.King Day
Snow. High near 6. Chance of precipitation is 90%.
Monday Night
Snow showers likely, mainly before 1am. Cloudy, with a low around -4. Chance of precipitation is 70%.
Tuesday
Mostly cloudy, with a high near 24.
Tuesday Night
A chance of snow showers. Cloudy, with a low around 18. Chance of precipitation is 50%.
Wednesday
Snow showers likely. Cloudy, with a high near 34. Chance of precipitation is 60%.
Wednesday Night
Snow showers likely. Cloudy, with a low around 16. Chance of precipitation is 60%.
Thursday
A chance of snow showers. Cloudy, with a high near 24. Chance of precipitation is 40%.
 
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GFS had an incremental drop in moisture for most of us. Similar to NAM. We are very much on the NW fringe of this storm. I’m a bit surprised at the bullish NWS forecast. They are definitely siding with a more phased system. 18z has not given a boost to that thinking (yet). 

Even if this thing jogged well SE, almost all of us would still see warning amounts. So there is that. 

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1 minute ago, CNY-WXFREAK said:

NYC must of been just added as was coastal CT and I cant for the life of me figure out why?

Maybe the Mets in their office are throwing everything else out except the Euro, lol?

They must have been reading the other subs here, and learned that ICON > GFS, Ukie has led the model field with this system, 1C temp variations are a trend and not model noise.

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