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


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Latest AFD from BUF in regards to the weekend LES event.

 

Long term /Thursday night through Monday/...
latest medium range guidance continuing to suggest a period of
winter weather as troughing and surge of colder air drops overhead
Thursday night through Saturday. By Friday morning 850 mb
temperatures drop to around -12c creating favorable lake effect
parameters. Some very interesting model soundings during this time
frame when inversion levels are essentially lost...with a bullseye
of maximum Omega in prime dendritic growth zone.


Strongly cyclonic flow and deep moisture will allow for lake effect
precipitation to develop Thursday night and continue through at
least Saturday night. Rain/snow showers on an initial west southwest
flow will completely change over to all snow by Friday evening as
the boundary layer cools...although this cooling process will take
place sooner over the higher elevations.

The flow eventually turns more west northwest by Friday night
through Saturday night which will focus lake snows into the western
southern tier and Tug Hill regions. Still too far out to talk about
accumulations...but based on some of the model soundings and
projected deep moisture it certainly seems reasonable that we will
see a plowable snowfall in these areas...with significant snowfall
certainly not out of the question.

Although it appears to be a certainty that we will be dealing with
wintry weather to start the period...do not get used to it. The
active Pacific regime will continue to dominate...keeping the
pattern progressive and rapidly kicking out troughing by late
Sunday. This will end the lake processes...with another extended
stretch of above normal temperatures likely to begin heading into
next week. There are indications even farther out that sharply
warmer weather will impact the area for the Christmas time period
with almost no chance for a white Christmas for most.

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This thread is funny... You can tell it's been a horrible winter thus far. In the NE threads there's a melt D almost every day haha. I think if this couple day cold threat coming up doesn't produce much the same may happen here lol!

Forget it Jake, it's the Great Lakes. You spend enough Christmas' a$$ deep in snow with only the hope of a February let-up to keep you from a 3rd roof shoveling, and a year like this one is a nice break. Anyone who argues is just too damn young. ;)  

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Select daily record high temperatures for December 14, 2015:

 

Allentown: 68° (old record: 60°, 2001)

Atlantic City: 65° (tied record: 65°, 1929)

Baltimore: 71° (tied record: 71°, 1929)

Bridgeport: 58° (tied record: 58°, 1991)

Buffalo: 71° (old record: 64°, 1901)

Islip: 58° (tied record: 58°, 1991)

Newark: 64° (old record: 63°, 2001)

Philadelphia: 70° (old record: 69°, 1881)

Raleigh: 75° (old record: 74°, 1918)

Rochester: 69° (old record: 62°, 1901)

Washington, DC: 69° (old record: 67°, 2001)

Watertown: 67° (old record: 65°, 1901)

Wilmington, DE: 69° (old record: 63°, 2001)

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.CLIMATE...

DAILY RECORD HIGH TEMPERATURES WERE SMASHED TODAY AS UNSEASONABLE
WARMTH REACHED THE LOWER GREAT LAKES.

BUFFALO...HIGH TEMPERATURE OF 71 SHATTERS THE OLD RECORD OF 64 SET
BACK IN 1901. THIS IS ALSO THE 2ND WARMEST DECEMBER TEMPERATURE
EVER RECORDED. THE WARMEST DECEMBER TEMP WAS 74 IN 1982.


ROCHESTER...HIGH TEMPERATURE OF 69 SHATTERS THE OLD RECORD OF 62
SET BACK IN 1901. THERE HAVE BEEN 3 TIMES IN HISTORY THE
TEMPERATURE REACHED 70 IN DECEMBER AND SEVERAL YEARS WITH 69...
MAKING TODAY A TIE FOR THE FOURTH WARMEST DECEMBER TEMPERATURE ON
RECORD. THE WARMEST DECEMBER TEMP WAS 72 IN 1982.

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it's Interesting that the NOV 2014 analog is showing up again, maybe mother nature is trying to give us heads up this time around? lol.. :whistle:

 

There is no way that is happening, but it has the chance to be a decent event. It is still way out there though. We will have a better understanding by Weds Nights runs. I think we end our snowless streak though. KBUF only needs .1. ^_^

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There is no way that is happening, but it has the chance to be a decent event. It is still way out there though. We will have a better understanding by Weds Nights runs. I think we end our snowless streak though. KBUF only needs .1. ^_^

Expect the unexpected with LES my friend. if KBUF somehow manages to escape w/o any accumulating snow over the weekend, we could be extending the snowless streak all the way out to New years!

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Expect the unexpected with LES my friend. if KBUF somehow manages to escape w/o any accumulating snow over the weekend, we could be extending the snowless streak all the way out to New years!

 

If that happens it will be a record that will never be broken. Or least for another 100 years.  .1 is usually just so easy to get in Buffalo in Nov/Dec

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My bet is that the low tracks too far to the North and West- towards James Bay rather than Ungava- leaving us warm and relatively dry. It seems to be this years mode.

I'd put my money on the same scenario. Hope thats wrong but my gut tells me something will prohibit this from being too significant of a lake effect event (I.e. Less than 12 inches off Erie and less than 18 inches off Ontario) which this year would seem like a Snowvember...
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Buffalo wants in near James Bay? 

 

I'm not sure I understand either - synoptic conditions that favor LES at Buffalo include a 500 hPa low at James Bay, right?

 

EDIT: or maybe Scott was saying that he would expect the low to track towards Ungava instead of James Bay? Although Ungava is not NW of James Bay. So I'm just not getting it. My understanding is if the synoptic conditions for LES  depend upon a low tracking N of the lakes, so the further S the low from James Bay, the more southerly and southeasterly the flow off the Lake Erie. So a James Bay low tends to be more supportive of Metro snows. 

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http://www.eas.slu.edu/CIPS/ANALOG/threats.php?reg=EC&rundt=2015121512

 

For those who want to bookmark this website. It's awesome as it correlates the atmospheric conditions of top 15 events within 120 hours to determine in the past what happened given those conditions. The extended analogs beyond 120 hours are there as well up to 14 days, but the accuracy goes down dramatically.

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Certainly the potential for some decent LES- at this point Euro/GFS keep it south of BUF for the most part, and along/south of the Tug Hill off Ontario. Of course, I won't be there for any of it, but it should be interesting to see if this LES potential falls apart just like the last one we had in November. 

 

Regardless, after this brief cooldown the roast of December will continue, and lake temps should still be running well above normal. Just waiting for that February '07 repeat...

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My understanding is if the synoptic conditions for LES  depend upon a low tracking N of the lakes, so the further S the low from James Bay, the more southerly and southeasterly the flow off the Lake Erie. So a James Bay low tends to be more supportive of Metro snows. 

Lots of variables....

 

Given the current conditions and projected strength of the Low (and its potential transfer over to the Atlantic); over the Soo and up to James won't work. Rather see one slide across Superior, just above Huron, and veeeerrrrry slowly curve it's way up to Ungava. I just don't see enough 'cold' in this one to milk out a Low that far North. Ontario can be quite different from Erie, though.

 

http://www.wpc.ncep.noaa.gov/pwpf/wwd_accum_probs.php?fpd=24&ptype=snow&amt=1&day=2&ftype=probabilities

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CHRISTMAS DAY : PERIOD OF RECORD 132 YEARS : 1873-2007

 

TEMPERATURE DATA  

 

HIGHEST 64 DEGREES IN 1982

LOWEST -10 DEGREES IN 1980

LOWEST MAXIMUM 7 DEGREES IN 1983

HIGHEST MINIMUM 55 DEGREES IN 1982

WARMEST CHRISTMAS DAY 1982...HIGH 64   LOW 55  MEAN 60

COLDEST CHRISTMAS DAY 1980...HIGH 16   LOW -10   MEAN 3

AVERAGE HIGH TEMPERATURE 33.6 DEGREES 

AVERAGE LOW TEMPERATURE 22.0 DEGREES

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