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Upstate NY/North Country and Canadian/VT Borders Mid Feb. 2015 through end of Winter


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-7.2 this morning. No colder than a number of mornings these past 2 winters.

 

I can't figure out what is going on with the ROC snow numbers. It's almost like they are using a random number generator. But looking at the climate summary, it looks like they reported a storm total of 5.5" which meshes pretty well with my local estimate of 6". So, who knows...

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Still really liking the potential for a 24-36 hour LES event starting Wednesday evening through Thursday night/Friday morning. 

 

attachicon.gifgfsNE_700_rhum_069.gif

The GFS has a beautiful looking broad cyclonic flow over Lake Ontario with a lot of moisture to work with. Using lake temps of 34, BUFKIT profiles show LI CAPEs of ~1000-1200 J/kg, along with EL rapidly rising to near 15k ft Wednesday evening. This flow wavers back and forth between roughly 280-295 for about 30 hours before BL winds turn more north-northwesterly and mid levels dry out considerably. The ECM is relatively similar although much less optimistic on total moisture availability. I ran text output for FZY, and it does have a 24 hour period of 280/290 flow, although the BL looks to be a little more sheared then I would like to see. 

 

attachicon.giftemp1.gif

One thing I continue to worry about is how hi-res models will treat the half frozen lake. Hi-res models did absolutely awful with the single band off Ontario last week which brought parts of Oswego county over a foot of snow in a short period of time. The 4km NAM (above) had a very weak signature for LES, but continues to mis-interpret loose ice cover on Ontario, giving flawed surface outputs like the one shown above for this morning. The map clearly shows that the NAM is essentially treating part of the lake like land, which can severely limit how hi-res guidance will do with any Lake snows. The latest 1km satellite shows the majority of the Lake still is open water, with ice concentrated on both the north and south shores of the Lake. 

 

It's hard not to like a sounding like this:

attachicon.gif06_GFS_066_43.44,-76.53_skewt_ML.gif

 

From what I've personally seen and talked about with a lot of others at SUNY Oswego, this is arguably the best setup for Oswego county this year (although potentially the early January event had a slightly better setup). The one thing I personally do not like is how fast the DGZ gets killed off by Thursday AM. Other than that, this looks like a good single band event for southeast of Ontario. 

 

I know there are some mets here that know a lot more then I do, so I'm curious as to what your thoughts are at this point!

 

Awesome, love the analysis!

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I think those were pics from last year....but not sure....but needless to say, we certainly have had cold enough temps to replicate those images!!

 

BTW, NWS BUF REALLY likes the potential for LES SE of Ontario....enough so to issue a LES Watch 48+ hours in advance!!!

 

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BUFFALO NY
1118 AM EST MON FEB 16 2015

NYZ004>006-170030-
/O.NEW.KBUF.LE.A.0005.150219T0000Z-150220T1800Z/
WAYNE-NORTHERN CAYUGA-OSWEGO-
INCLUDING THE CITIES OF...NEWARK...FAIR HAVEN...OSWEGO
1118 AM EST MON FEB 16 2015

...LAKE EFFECT SNOW WATCH IN EFFECT FROM WEDNESDAY EVENING
THROUGH FRIDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A LAKE EFFECT
SNOW WATCH...WHICH IS IN EFFECT FROM WEDNESDAY EVENING THROUGH
FRIDAY AFTERNOON.

* LOCATIONS...WAYNE...OSWEGO AND NORTHERN CAYUGA COUNTIES.

* TIMING...FROM EARLY WEDNESDAY EVENING THROUGH FRIDAY AFTERNOON.

* ACCUMULATIONS...SNOW POTENTIALLY ACCUMULATING OVER 7 INCHES.

* WINDS...WEST 15 TO 25 MPH.

* VISIBILITIES....UNDER A QUARTER MILE AT TIMES.

* TEMPERATURES...LOWS 5 BELOW TO 5 ABOVE ZERO WEDNESDAY NIGHT.
  HIGHS IN THE POSITIVE SINGLE DIGITS THURSDAY. LOWS 5 BELOW TO 10
  BELOW ZERO THURSDAY NIGHT. HIGHS AROUND 10 FRIDAY.

* IMPACTS...MODERATE TO HEAVY ACCUMULATING SNOW COULD PRODUCE VERY
  DIFFICULT TRAVEL WITH SNOW COVERED ROADS.

* FORECASTER CONFIDENCE...MEDIUM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A LAKE EFFECT SNOW WATCH MEANS THAT SIGNIFICANT WINTER WEATHER IS
POSSIBLE IN LOCALIZED AREAS.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE SOURCE OF
WEATHER INFORMATION FOR THE LATEST UPDATES. ADDITIONAL DETAILS
CAN ALSO BE FOUND AT WWW.WEATHER.GOV/BUFFALO.

 

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I think those were pics from last year....but not sure....but needless to say, we certainly have had cold enough temps to replicate those images!!

 

BTW, NWS BUF REALLY likes the potential for LES SE of Ontario....enough so to issue a LES Watch 48+ hours in advance!!!

 

URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE BUFFALO NY

1118 AM EST MON FEB 16 2015

NYZ004>006-170030-

/O.NEW.KBUF.LE.A.0005.150219T0000Z-150220T1800Z/

WAYNE-NORTHERN CAYUGA-OSWEGO-

INCLUDING THE CITIES OF...NEWARK...FAIR HAVEN...OSWEGO

1118 AM EST MON FEB 16 2015

...LAKE EFFECT SNOW WATCH IN EFFECT FROM WEDNESDAY EVENING

THROUGH FRIDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A LAKE EFFECT

SNOW WATCH...WHICH IS IN EFFECT FROM WEDNESDAY EVENING THROUGH

FRIDAY AFTERNOON.

* LOCATIONS...WAYNE...OSWEGO AND NORTHERN CAYUGA COUNTIES.

* TIMING...FROM EARLY WEDNESDAY EVENING THROUGH FRIDAY AFTERNOON.

* ACCUMULATIONS...SNOW POTENTIALLY ACCUMULATING OVER 7 INCHES.

* WINDS...WEST 15 TO 25 MPH.

* VISIBILITIES....UNDER A QUARTER MILE AT TIMES.

* TEMPERATURES...LOWS 5 BELOW TO 5 ABOVE ZERO WEDNESDAY NIGHT.

  HIGHS IN THE POSITIVE SINGLE DIGITS THURSDAY. LOWS 5 BELOW TO 10

  BELOW ZERO THURSDAY NIGHT. HIGHS AROUND 10 FRIDAY.

* IMPACTS...MODERATE TO HEAVY ACCUMULATING SNOW COULD PRODUCE VERY

  DIFFICULT TRAVEL WITH SNOW COVERED ROADS.

* FORECASTER CONFIDENCE...MEDIUM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A LAKE EFFECT SNOW WATCH MEANS THAT SIGNIFICANT WINTER WEATHER IS

POSSIBLE IN LOCALIZED AREAS.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE SOURCE OF

WEATHER INFORMATION FOR THE LATEST UPDATES. ADDITIONAL DETAILS

CAN ALSO BE FOUND AT WWW.WEATHER.GOV/BUFFALO.

 

 

It's sunny out today, will be able to get a good idea on where the ice coverage is on Ontario. Looks like a 3 day event which could really add up if the band stalls.

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It's sunny out today, will be able to get a good idea on where the ice coverage is on Ontario. Looks like a 3 day event which could really add up if the band stalls.

post-595-0-55009400-1424108411_thumb.gif

At least according to GLERL things aren't matching up. There's still signiicantly more open water than what is suggested.

 

4km NAM already developing a band at hr. 60 even with it's roghly 1/3 of the lake open at initialization.

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attachicon.gifNew_York.vis.gif

At least according to GLERL things aren't matching up. There's still signiicantly more open water than what is suggested.

 

4km NAM already developing a band at hr. 60 even with it's roghly 1/3 of the lake open at initialization.

It's hard to tell if that patch over the east central part of the lake is ice or cloud cover. Even if it's ice it's probably broken up. Same with the patch off Sandy Pond/Scriba.

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BUF:

 

HAVE RAISED POPS TO 90 OR HIGHER FROM WAYNE COUNTY TO SOUTHERN OSWEGO COUNTY WHERE

ACCUMULATIONS FROM WEDNESDAY NIGHT INTO FRIDAY COULD POTENTIALLY BE

MEASURED IN FEET.  

Nice, Very Nice, lol, I guess we can start digging tunnels around here come Friday if what their alluding to comes to fruition.  Can't get any more Southern than me in Oswego County!!

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Awesome analysis @AppsRunner.

hope I'm not sitting 5 miles too far south for this one. Had a couple of those this season already, though not particularly unusual. I need ~290 flow, which never seems to be all that stable.

I saw the Lake Effect Snow Watch alert pop up on my phone and thought it was some sort of delayed data, LOL. No way BGM puts up flags until nearer the event.

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BUF:

 

HAVE RAISED POPS TO 90 OR HIGHER FROM WAYNE COUNTY TO SOUTHERN OSWEGO COUNTY WHERE

ACCUMULATIONS FROM WEDNESDAY NIGHT INTO FRIDAY COULD POTENTIALLY BE

MEASURED IN FEET.  

 

Looks good! Can't wait to see that band. I'll be in Rochester training tomorrow, I wish I was going thurs! I'll be in Ellicottville from Fri-Sun. The storm system this weekend looks solid on the Euro, hopefully other models hop on board to!

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Lake Effect:

 

A LAKE EFFECT SNOW WATCH HAS BEEN ISSUED FROM WAYNE COUNTY TO OSWEGO
COUNTY FOR THE WEDNESDAY EVENING THROUGH EARLY FRIDAY AFTERNOON TIME
FRAME. THE INTENSIFYING ARCTIC AIR SOUTHEAST OF LAKE ONTARIO
WEDNESDAY NIGHT WILL COMBINE WITH A FAIRLY DEEP SYNOPTIC MOISTURE
FIELD...A CAP ABV 10K FT AND AT LEAST INITIALLY...A 2-3K FT
DENDRITIC GROWTH ZONE TO PRODUCE MODERATE TO HEAVY LAKE EFFECT SNOW.
MANY OF THESE PARAMETERS HAVE BEEN ABSENT FROM RECENT LAKE SNOW
EVENTS...SO FROM THIS VANTAGE POINT THERE APPEARS TO BE THE
POTENTIAL FOR SIGNIFICANT LAKE SNOW ACCUMULATIONS. HAVE RAISED POPS
TO 90 OR HIGHER FROM WAYNE COUNTY TO SOUTHERN OSWEGO COUNTY WHERE
ACCUMULATIONS FROM WEDNESDAY NIGHT INTO FRIDAY COULD POTENTIALLY BE
MEASURED IN FEET. SEVERAL INCHES OF SNOW WILL BE LIKELY FROM NIAGARA
TO MONROE COUNTY AS WELL...BUT FROM THIS VANTAGE POINT IT LOOKS MORE
LIKE A HIGH END ADVISORY TYPE OF EVENT FOR THOSE PARTICULAR COUNTIES.

 

Possible storm this weekend:

 

AS PACIFIC ENERGY EJECTS ACROSS THE CENTRAL PLAINS FRIDAY NIGHT...
CYCLOGENESIS IN THE VCNTY OF OKLAHOMA WILL SPAWN A STORM SYSTEM THAT
COULD EVENTUALLY HAVE SIGNIFICANT IMPACTS ACROSS OUR FORECAST AREA.
MEANWHILE...THE AFOREMENTIONED SFC HIGH WILL EXIT OFF THE COAST. THE
DEEPENING SOUTHERLY FLOW BETWEEN THE SYSTEMS WILL ACCELERATE THE
WARM ADVECTION ACROSS THE LOWER GREAT LAKES...WHICH IN TURN WILL
PROMOTE SCATTERED NUISANCE SNOW SHOWERS.

THE STORM SYSTEM OVER THE PLAINS WILL PUSH NORTHEAST TO THE LOWER
OHIO VALLEY DURING THE DAY SATURDAY AS INVERTED TROUGH WILL EXTEND
TO THE LOWER GREAT LAKES. MARGINAL LOW LEVEL CONVERGENCE ASSOCIATED
WITH THIS TROUGH COULD LEAD TO MORE SNOW SHOWERS...WHILE H85 TEMPS
CLIMBING TO -4C OR SO WILL SUPPORT NOTICEABLY MILDER SFC CONDITIONS.
MAX TEMPS SHOULD REACH THE MID 20S ACROSS THE WRN COUNTIES.

IT COULD POTENTIALLY BECOME VERY INTERESTING ACROSS OUR REGION
SATURDAY NIGHT AS THE STORM SYSTEM OVER THE OHIO VALLEY IS EXPECTED
TO LIFT ACROSS OUR REGION. THIS TRACK WOULD SUPPORT ACCUMULATING
SNOW DURING THE EVENING...WITH THE SNOW TRANSITIONING TO AN ICY MIX
DURING THE OVERNIGHT. GIVEN THE INCONSISTENCY BETWEEN THE VARIOUS
MEDIUM RANGE PACKAGES...AM NOT CONFIDENT ENOUGH TO GO WITH AN ICE
YET...BUT THIS WILL CERTAINLY BEAR WATCHING.

THE STORM SYSTEM WILL THEN ADVANCE NORTHEAST AND EXIT OUR REGION VIA
NEW ENGLAND ON SUNDAY. COLD AIR CHARGING BACK ACROSS THE LOWER GREAT
LAKES IN ITS WAKE WOULD CHANGE ANY MIXED PCPN BACK TO SNOW AS LATE
MORNING MAX TEMPS IN THE 20S WOULD TUMBLE BACK THROUGH THE TEENS IN
THE AFTERNOON.

 

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Euro says game on, the GFS says "what storm?"  At least we have something to track....

 

 

Lake Effect:

 

A LAKE EFFECT SNOW WATCH HAS BEEN ISSUED FROM WAYNE COUNTY TO OSWEGO
COUNTY FOR THE WEDNESDAY EVENING THROUGH EARLY FRIDAY AFTERNOON TIME
FRAME. THE INTENSIFYING ARCTIC AIR SOUTHEAST OF LAKE ONTARIO
WEDNESDAY NIGHT WILL COMBINE WITH A FAIRLY DEEP SYNOPTIC MOISTURE
FIELD...A CAP ABV 10K FT AND AT LEAST INITIALLY...A 2-3K FT
DENDRITIC GROWTH ZONE TO PRODUCE MODERATE TO HEAVY LAKE EFFECT SNOW.
MANY OF THESE PARAMETERS HAVE BEEN ABSENT FROM RECENT LAKE SNOW
EVENTS...SO FROM THIS VANTAGE POINT THERE APPEARS TO BE THE
POTENTIAL FOR SIGNIFICANT LAKE SNOW ACCUMULATIONS. HAVE RAISED POPS
TO 90 OR HIGHER FROM WAYNE COUNTY TO SOUTHERN OSWEGO COUNTY WHERE
ACCUMULATIONS FROM WEDNESDAY NIGHT INTO FRIDAY COULD POTENTIALLY BE
MEASURED IN FEET. SEVERAL INCHES OF SNOW WILL BE LIKELY FROM NIAGARA
TO MONROE COUNTY AS WELL...BUT FROM THIS VANTAGE POINT IT LOOKS MORE
LIKE A HIGH END ADVISORY TYPE OF EVENT FOR THOSE PARTICULAR COUNTIES.

 

Possible storm this weekend:

 

AS PACIFIC ENERGY EJECTS ACROSS THE CENTRAL PLAINS FRIDAY NIGHT...
CYCLOGENESIS IN THE VCNTY OF OKLAHOMA WILL SPAWN A STORM SYSTEM THAT
COULD EVENTUALLY HAVE SIGNIFICANT IMPACTS ACROSS OUR FORECAST AREA.
MEANWHILE...THE AFOREMENTIONED SFC HIGH WILL EXIT OFF THE COAST. THE
DEEPENING SOUTHERLY FLOW BETWEEN THE SYSTEMS WILL ACCELERATE THE
WARM ADVECTION ACROSS THE LOWER GREAT LAKES...WHICH IN TURN WILL
PROMOTE SCATTERED NUISANCE SNOW SHOWERS.

THE STORM SYSTEM OVER THE PLAINS WILL PUSH NORTHEAST TO THE LOWER
OHIO VALLEY DURING THE DAY SATURDAY AS INVERTED TROUGH WILL EXTEND
TO THE LOWER GREAT LAKES. MARGINAL LOW LEVEL CONVERGENCE ASSOCIATED
WITH THIS TROUGH COULD LEAD TO MORE SNOW SHOWERS...WHILE H85 TEMPS
CLIMBING TO -4C OR SO WILL SUPPORT NOTICEABLY MILDER SFC CONDITIONS.
MAX TEMPS SHOULD REACH THE MID 20S ACROSS THE WRN COUNTIES.

IT COULD POTENTIALLY BECOME VERY INTERESTING ACROSS OUR REGION
SATURDAY NIGHT AS THE STORM SYSTEM OVER THE OHIO VALLEY IS EXPECTED
TO LIFT ACROSS OUR REGION. THIS TRACK WOULD SUPPORT ACCUMULATING
SNOW DURING THE EVENING...WITH THE SNOW TRANSITIONING TO AN ICY MIX
DURING THE OVERNIGHT. GIVEN THE INCONSISTENCY BETWEEN THE VARIOUS
MEDIUM RANGE PACKAGES...AM NOT CONFIDENT ENOUGH TO GO WITH AN ICE
YET...BUT THIS WILL CERTAINLY BEAR WATCHING.

THE STORM SYSTEM WILL THEN ADVANCE NORTHEAST AND EXIT OUR REGION VIA
NEW ENGLAND ON SUNDAY. COLD AIR CHARGING BACK ACROSS THE LOWER GREAT
LAKES IN ITS WAKE WOULD CHANGE ANY MIXED PCPN BACK TO SNOW AS LATE
MORNING MAX TEMPS IN THE 20S WOULD TUMBLE BACK THROUGH THE TEENS IN
THE AFTERNOON.

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I actually don't want this. Thursday and Thursday night still look very good for a single band somewhere within 15 miles of the Onondaga/Oswego County border. I am not all up on my met. skills but those 850 temps look dam cold. Does that mean small dendrites or can the uplift be enough to get to a good growth region? Are we talking 1/4 to 1/2 per hour or 1 to 2 per hour type stuff? Hoping this becomes a multiband, nuisance type deal.

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I actually don't want this. Thursday and Thursday night still look very good for a single band somewhere within 15 miles of the Onondaga/Oswego County border. I am not all up on my met. skills but those 850 temps look dam cold. Does that mean small dendrites or can the uplift be enough to get to a good growth region? Are we talking 1/4 to 1/2 per hour or 1 to 2 per hour type stuff? Hoping this becomes a multiband, nuisance type deal.

Once a band gets going, the heat flux of Ontario will modify the column enough so that dendrites will be able to sufficiently grow...essentially the convergence line will be a bubble of opportunity for growth!! :)

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I actually don't want this. Thursday and Thursday night still look very good for a single band somewhere within 15 miles of the Onondaga/Oswego County border. I am not all up on my met. skills but those 850 temps look dam cold. Does that mean small dendrites or can the uplift be enough to get to a good growth region? Are we talking 1/4 to 1/2 per hour or 1 to 2 per hour type stuff? Hoping this becomes a multiband, nuisance type deal.

....It'll be the 1-4"/hr. stuff...the event will last stoutly for about 24 hours....a quarter inch per hour (if the band remained perfectly stationary)...would yield 6" (without accounting for settling during the measuring periods of 6hrs.)....This will be the LES event of the season for someone in Oswego and/or N. Onondaga Co.

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I actually don't want this. Thursday and Thursday night still look very good for a single band somewhere within 15 miles of the Onondaga/Oswego County border. I am not all up on my met. skills but those 850 temps look dam cold. Does that mean small dendrites or can the uplift be enough to get to a good growth region? Are we talking 1/4 to 1/2 per hour or 1 to 2 per hour type stuff? Hoping this becomes a multiband, nuisance type deal.

Are you not feeling well? Git yur Boston on. ;)

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I'd like to see some of the meso models out of BUF....they really have become outstanding over the last 5 years or so, both in placement and intensity of single banded LES events.  That said, pinning me down right now, I'd go with a lolly just east of Fulton (Penneville/Palermo) of 30"....but anywhere 10 miles either side of a line along the Hannibal, Fulton, S. Oswego Co. area into the S. Tug will be candidates for 2+ feet.  MBY MIGHT be on the southern edge....my thinking as of right now...

 

I especially like the speed of the progged winds....just right to become organized and carry inland a decent distance...I would caution that we are (as much as it doesn't seem) starting to get into the time of the year where daytime LES can become a bit disorganized due to the angle of the sun (creating differential heating thermals)...so don't be surprised to see a fantastically organized single band Wed. night Thurs. morning, become a bit cellular in nature later Thursday afternoon for a time....

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I actually don't want this. Thursday and Thursday night still look very good for a single band somewhere within 15 miles of the Onondaga/Oswego County border. I am not all up on my met. skills but those 850 temps look dam cold. Does that mean small dendrites or can the uplift be enough to get to a good growth region? Are we talking 1/4 to 1/2 per hour or 1 to 2 per hour type stuff? Hoping this becomes a multiband, nuisance type deal.

Like Brian said (not in so many words).....Get your Big Boy pants on!! lol

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I'd like to see some of the meso models out of BUF....they really have become outstanding over the last 5 years or so, both in placement and intensity of single banded LES events.  That said, pinning me down right now, I'd go with a lolly just east of Fulton (Penneville/Palermo) of 30"....but anywhere 10 miles either side of a line along the Hannibal, Fulton, S. Oswego Co. area into the S. Tug will be candidates for 2+ feet.  MBY MIGHT be on the southern edge....my thinking as of right now...

 

I especially like the speed of the progged winds....just right to become organized and carry inland a decent distance...I would caution that we are (as much as it doesn't seem) starting to get into the time of the year where daytime LES can become a bit disorganized due to the angle of the sun (creating differential heating thermals)...so don't be surprised to see a fantastically organized single band Wed. night Thurs. morning, become a bit cellular in nature later Thursday afternoon for a time....

 

 

Like Brian said (not in so many words).....Get your Big Boy pants on!! lol

Thanks for the thoughts. I will get psyched for this guys. Maybe the cold is getting to me. Waahhhhhhwahhhhhh. Go big or go home. 18 Z GFS wants to spin up big trouble next week too.

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