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Upstate NY/North Country + adjacent ON, QC, VT: Middle of Winter


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:wub: btw BUF just upgraded the winter storm watches, Northern Erie and Niagara are left out though.. i'm thinking 4-6" for BUF.

...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY EVENINGTHROUGH WEDNESDAY EVENING...* LOCATIONS...NIAGARA FRONTIER INCLUDING THE BUFFALO METRO AREA.* TIMING...LATE TUESDAY EVENING THROUGH LATE WEDNESDAY EVENING.* HAZARDS...MODERATE TO HEAVY SNOW.* ACCUMULATIONS...SNOW POTENTIALLY ACCUMULATING 4 TO 8 INCHES.
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:wub: btw BUF just upgraded the winter storm watches, Northern Erie and Niagara are left out though.. i'm thinking 4-6" for BUF.

 

These systems always come 50 miles north than expected. Subtle NW trends are hard to predict. I can't even count how many times mixing crept up all the way to metro Buffalo when the mixing line was supposed to be at the state line. ^_^

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00Z NAM puts out 0.70" at SYR, 0.68" at BUF, 0.72" at ROC, 1.00" at BGM and 0.94" at ALB - liquid equivalents. 

 

Take ~25% off those values and dial in a 12:1 ratio and it ends up about 10:1 off of the NAM output, roughly.  Def WSW material for NY Southern Tier up I-88. BUF/ROC/SYR probably warranted as low end Warnings...6-9" generally, excluding any lake enhancement, which probably bumps ROC closer to what BGM and ALB will get (10-12").  Any banding could enhance/rob totals, not sure of that signature for this event up here, maybe best chance for that along so. tier towards ALB.  That's my guesstimate of this.  

 

This weekend too far away to even speculate on outcomes. We've all seen the eye candy.

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Man i would take that 6z run of today and be done with the winter, it showed 30"+ for the region. :wub:

This is probably the usual GooFuS head fake we get about this time on decent east coast systems. Sometimes these shifts are right but usually not. We'll see what Euro and Canadian trend towards.   

 

In summary, I suspect:

post-3165-0-77879800-1391491182_thumb.gi

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Man i would take that 6z run of today and be done with the winter, it showed 30"+ for the region. :wub:

Big snow on tap bro! I was worried early on Monday, past history should of informed me to just: relax. Always a northwest jog on the models in the least 42 hrs. Someday the models will catch on and end it. But not for this storm. Thruway gets a foot! Bank on it. Buf maybe a touch less...

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Big snow on tap bro! I was worried early on Monday, past history should of informed me to just: relax. Always a northwest jog on the models in the least 42 hrs. Someday the models will catch on and end it. But not for this storm. Thruway gets a foot! Bank on it. Buf maybe a touch less...

Yes i like the trends, not really sure why BUF is not upgrading that watch but w/e lol.

 

This is probably the usual GooFuS head fake we get about this time on decent east coast systems. Sometimes these shifts are right but usually not. We'll see what Euro and Canadian trend towards.   

 

In summary, I suspect:

0z euro is OTS haha!

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I'm bullish on this storm. Lake enhancement will likely aid tots

 

 

THE MAIN CONCERN THROUGH THE SHORT TERM PERIOD WILL CONTINUE TO BE A

WIDESPREAD SYNOPTIC SNOWFALL ACROSS THE AREA...WITH SOME

COMPLICATIONS FROM LAKE ENHANCEMENT TOWARDS THE TAIL END SOUTH OF

LAKE ONTARIO.

MODEL GUIDANCE REMAINS IN GOOD AGREEMENT WITH THE LARGE SCALE

FEATURES AS A MILLER TYPE-B SYSTEM MOVES FROM THE OHIO VALLEY TO NEW

ENGLAND. A SURFACE LOW WILL MOVE THROUGH THE LOWER OHIO VALLEY EARLY

WEDNESDAY MORNING BEFORE YIELDING TO A SECONDARY SURFACE LOW TO THE

SOUTH OF NEW ENGLAND BY EARLY AFTERNOON AS THE LEAD SHORTWAVE TROUGH

REACHES THE COASTAL FRONT AND TRIGGERS CYCLOGENESIS. IN THE MID

LEVELS A STRONG VORTICITY MAXIMA WILL CROSS THE LOWER LAKES REGION

DURING THE FIRST HALF OF WEDNESDAY.

FORCING FOR ASCENT THROUGH THE FIRST HALF OF THE SYSTEM TONIGHT

THROUGH EARLY WEDNESDAY MORNING WILL BE PRIMARILY FROM LOW/MID LEVEL

WARM ADVECTION AHEAD OF THE SURFACE LOW...SUPPORTED BY A BELT OF

ENHANCED 900-700MB FLOW AHEAD OF THE TROUGH. UPPER LEVEL DIVERGENCE

IN THE RIGHT ENTRANCE REGION OF A 160+ KNOT UPPER LEVEL JET OVER

QUEBEC WILL ALSO AID IN DEEP LAYER ASCENT. FROM MID MORNING THROUGH

WEDNESDAY AFTERNOON WARM ADVECTION WILL SHIFT WELL EAST OF THE AREA.

AT THIS POINT FORCING FOR ASCENT WILL TRANSITION TO DPVA WITH THE

MID LEVEL SHORTWAVE...AND ALSO TO MID LEVEL FRONTOGENESIS AND

DEFORMATION. BOTH THE NAM AND GFS SUGGEST AN EAST/WEST ORIENTED BAND

OF STRETCHING DEFORMATION IN THE 850MB-700MB LAYER ACROSS WESTERN

AND CENTRAL NEW YORK DURING THE DAY WEDNESDAY...JUST NORTH OF THE

850MB LOW TRACK. THIS AXIS OF DEFORMATION MAY SUPPORT SOME MESOSCALE

ENHANCEMENT TO SNOWFALL...AND THEY TYPICALLY ALSO SUPPORT A LITTLE

BETTER SNOW TO WATER RATIOS THAN WARM ADVECTION.

THIS SYSTEM WILL HAVE AMPLE MOISTURE WITH IT GIVEN ITS TRACK THROUGH

THE SOUTHERN PLAINS BEFORE HEADING NORTHEAST INTO THE OHIO VALLEY.

THIS WILL ALLOW IT TO CAPTURE A PLUME OF HIGHER PWAT OVER THE GULF

STATES. SPECIFIC HUMIDITY DURING THE WARM ADVECTION PORTION OF THE

STORM REACHES ABOUT 3.5G/KG ACROSS THE SOUTHERN TIER AND ABOUT

2.5G/KG UP TO THE SOUTH SHORE OF LAKE ONTARIO...MORE THAN AMPLE

MOISTURE FOR EARLY FEBRUARY.

ONE FINAL CONSIDERATION WILL BE LAKE ENHANCEMENT ALONG THE SOUTH

SHORE OF LAKE ONTARIO...MAINLY LATE WEDNESDAY AFTERNOON AND EVENING

AS FLOW BECOMES BETTER ALIGNED FROM THE NORTH. THE AIRMASS IS NOT

OVERLY COLD...BUT WILL BE COLD ENOUGH TO SUPPORT SOME HELP FROM THE

LAKE AS EQUILIBRIUM LEVELS RISE TO AROUND 5K FEET. LATEST NAM 925MB

OMEGA ANALYSIS SUGGESTS A DECENT PERIOD OF LAKE ENHANCEMENT ACROSS

THE NIAGARA FRONTIER EAST TO ROCHESTER AND WAYNE COUNTY FROM ABOUT

21Z WED THROUGH 03Z THU. THIS TAIL END LAKE ENHANCEMENT OFTEN

PRODUCES FLUFFY ACCUMULATIONS WITH HIGH SNOW TO WATER RATIOS.

WE LOOKED BACK AT ANALOGS TO THIS EVENT USING THE SAINT LOUIS

UNIVERSITY CIPS SITE. THE AVERAGE OF ALL THE TOP ANALOGS YIELDS HIGH

END ADVISORY TO LOW END WARNING AMOUNTS ACROSS MOST OF THE REGION.

THE BEST FIT OF ALL THE ANALOGS WAS AN EVENT FROM EARLY JANUARY

1996. THIS EVENT WAS NEARLY IDENTICAL WITH SURFACE AND MID LEVEL

FEATURES...ALTHOUGH IT WAS ABOUT 10F COLDER AT THE SURFACE. THIS

ANALOG EVENT PRODUCED WARNING CRITERIA SNOW ACROSS THE REGION...WITH

SOME NOTABLE LAKE ENHANCEMENT SOUTH OF LAKE ONTARIO DUE TO THE

COLDER TEMPS.

PUTTING ALL OF THE ABOVE TOGETHER...WE EXPECT STORM TOTAL SNOW

AMOUNTS TO REACH THE 6-9 INCH RANGE FOR THE BULK OF THE AREA...WITH

A FEW 10-11 INCH AMOUNTS POSSIBLE ON SOME OF THE HILLS OF THE

SOUTHERN TIER AND BRISTOL HILLS. THE SYNOPTIC STORM BY ITSELF WOULD

PROBABLY NOT PRODUCE WARNING AMOUNTS ACROSS THE NIAGARA FRONTIER

INCLUDING BUFFALO...BUT WITH AN ADDED BOOST FROM FLUFFY LAKE

ENHANCEMENT AT THE END IT SHOULD GET CLOSE. THE LOWEST AMOUNTS ARE

LIKELY TO BE ACROSS JEFFERSON COUNTY...ESPECIALLY NEAR THE SAINT

LAWRENCE RIVER WHERE ONLY A FEW INCHES ARE EXPECTED.

WITH THIS IN MIND...WE WILL GO WITH A WINTER STORM WARNING FOR THE

ENTIRE CWA EXCEPT JEFFERSON COUNTY WHERE AN ADVISORY SHOULD SUFFICE.

IT SHOULD BE NOTED THAT FOR MOST AREAS THIS IS A LOW END WARNING.

THE SYNOPTIC SNOW WILL END LATER WEDNESDAY AFTERNOON AND EARLY

EVENING...BUT LAKE ENHANCEMENT WILL PERSIST SOUTH OF LAKE ONTARIO

AND GRADUALLY TRANSITION INTO MORE PURE...LIMITED LAKE EFFECT SNOW

SHOWERS OVERNIGHT ON NORTHERLY FLOW FROM THE NIAGARA FRONTIER TO THE

GENESEE VALLEY AND NORTHERN FINGER LAKES. EXPECT ANY ADDITIONAL

ACCUMULATIONS TO BE MINOR AFTER MID TO LATE EVENING.

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