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Upstate NY/North Country Late Summer & Fall Thread


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As I had mentioned in the Lakes forum, it appeared Westfield was one of the towns in biggest peril

from the most defined low-level circulation on radar just after 5 PM EST. Reports of quite a bit of

damage from around there...hopefully no injuries as this had to have been unexpected for those

residents. On another note, great job by the NWS Buffalo on the handling of this event. Without

much of an indication that the strongest storms would move into the area as quickly as they did,

the office reacted super fast and did an excellent job at placing warnings, especially for the specific

towns in the greatest danger.

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Off of Lake Erie, it looks like there will be a layer of fairly dry air present at mid levels wednesday night to thursday morning, making it hard for the band to develop before early thursday afternoon. By around 2 pm, however, the deep moist layer extends up to around 550 mb, translating to lake induced cape above 1000 j/kg. There will be some wind shear at this time, probably resulting in some very intense lake effect cells. The wsw winds will probably bring the band into southern erie county. Around 4 pm, it looks like the shear will decrease and an intense band will organize, probably drifting southward into chautauqua county. The bufkit profile for jamestown shows an amazing 1200 j/kg of cape at this time and a LI equilibrium level above 500 mb, meaning that the band will have very intense snowfall rates and the possibility for lightning. The band will continue southward through chautauqua county and weaken by 1 am. It looks like somewhere in southern erie to northern chautauqua counties will have the potential for the greatest accumulation, with 3-4 hours of heavy snowfall.

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My main concern regarding the upcoming LES event...at least as far as Lake Erie is concerned...is the relatively narrow window of opportunity for all of the parameters to come together to produce a "classic" band of heavy snow. It looks like a fairly short duration event to me...not really starting until Thursday afternoon, and pretty much ending by early Friday morning. On top of that, the llvl winds aren't really projected to remain steady state for a long enough period of time to hammer one location for hours on end - it looks like a transient band to me, beginning very close to the Buffalo metro area during the initial stages of the event then rapidly settling into the Southern Tier following the passage of the trough axis Thursday evening.

Another concern I have is the fact that bufkit soundings seem to depict the deepest moisture just below the dendritic growth layer (DGL) for a good portion of the event...which may hamper snow growth/ratios. Instability parameters are very good though, with lake-induced CAPEs progged to exceed 1000J and equilibrium levels pushing 20k feet. But I've seen dry air in the DGL result in some disappointing events in the past, even when the instability was projected to be very good. We'll see.

There is certainly the potential for a short duration but fairly intense lake effect event that could yield advisory or perhaps low end warning criteria accumulations...but I'm not willing to climb 100% on board just yet! We'll see how the progs shape up over the next couple of days, and I'll be sure to check in with my updated thoughts whenever I can!

Justin

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My main concern regarding the upcoming LES event...at least as far as Lake Erie is concerned...is the relatively narrow window of opportunity for all of the parameters to come together to produce a "classic" band of heavy snow. It looks like a fairly short duration event to me...not really starting until Thursday afternoon, and pretty much ending by early Friday morning. On top of that, the llvl winds aren't really projected to remain steady state for a long enough period of time to hammer one location for hours on end - it looks like a transient band to me, beginning very close to the Buffalo metro area during the initial stages of the event then rapidly settling into the Southern Tier following the passage of the trough axis Thursday evening.

Another concern I have is the fact that bufkit soundings seem to depict the deepest moisture just below the dendritic growth layer (DGL) for a good portion of the event...which may hamper snow growth/ratios. Instability parameters are very good though, with lake-induced CAPEs progged to exceed 1000J and equilibrium levels pushing 20k feet. But I've seen dry air in the DGL result in some disappointing events in the past, even when the instability was projected to be very good. We'll see.

There is certainly the potential for a short duration but fairly intense lake effect event that could yield advisory or perhaps low end warning criteria accumulations...but I'm not willing to climb 100% on board just yet! We'll see how the progs shape up over the next couple of days, and I'll be sure to check in with my updated thoughts whenever I can!

Justin

Hello from one of your old fans in Binghamton! Please tell me what kind of winter you think I'm gonna have in the southern tier!!!!

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18z NAM follows suit with the backing off the flow late Thursday afternoon/evening. However, it is pretty disconcerting to see the lack of model support for significant bands. The NAM usually is pretty good at putting lake-effect east of the lakes when the conditions are good. Who would think 516 dm thicknesses, 700mb RH over 70% and -9C 850s over 10-11C lakes would be so problematic?

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PUBLIC INFORMATION STATEMENT

NATIONAL WEATHER SERVICE BUFFALO NY

332 PM EST TUE NOV 15 2011

..MULTIPLE TORNADOES CONFIRMED ON NOV 14 2011

..TORNADO CONFIRMED NEAR FREDONIA IN CHAUTAUQUA COUNTY NEW YORK

LOCATION...FREDONIA IN CHAUTAUQUA COUNTY NEW YORK

DATE...NOV 14 2011

ESTIMATED TIME...454-505 PM EST

MAXIMUM EF-SCALE RATING...EF2

ESTIMATED MAXIMUM WIND SPEED...105-115 MPH

MAXIMUM PATH WIDTH...125 YDS

PATH LENGTH...4.6 MILES

BEGINNING LAT/LON...42.4463N/79.4279W

ENDING LAT/LON...42.4429N/79.3391W

* FATALITIES...NONE

* INJURIES...NONE

* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO

CHANGE PENDING FINAL REVIEW OF THE EVENT(S) AND PUBLICATION IN NWS

STORM DATA.

..SUMMARY

THE NATIONAL WEATHER SERVICE IN BUFFALO NY HAS CONFIRMED A TORNADO

NEAR FREDONIA IN CHAUTAUQUA COUNTY NEW YORK ON NOV 14 2011.

THE TORNADO FORMED OVER LAKE ERIE AND MOVED ONSHORE ON BEACH PLACE

IN FREDONIA. THERE IT RIPPED SHINGLES OFF TWO HOMES. ONE TREE FELL

ON A HOME. THE SCREEN FROM THE VAN BUREN DRIVE IN WAS BLOWN OVER.

SEVERAL PINE TREES WERE TOPPED ALONG VAN BUREN DRIVE. ALSO ON VAN

BUREN DRIVE A BARN WAS COMPLETELY DESTROYED. AS THE TORNADO MOVED

EAST ACROSS FAREL ROAD EIGHT POWER POLES WERE SNAPPED. ADDITIONAL

TREES WERE TOPPED AS THE TORNADO MOVED TOWARD THE VILLAGE OF

FREDONIA. A GARAGE WAS DESTROYED NEAR THE CORNER OF UNIVERSITY

PARK AND RISLEY STREET. A FEW MORE TREES WERE TOPPED NEAR CENTER

STREET BEFORE THE FINAL LIFTOFF.

ALTHOUGH THE PATH LENGTH WAS OVER FOUR MILES, THE TORNADO WAS NOT

ON THE GROUND THE ENTIRE TIME.

THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT

WEATHER.GOV/BUF.

FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO

THE FOLLOWING CATEGORIES:

EF0...WIND SPEEDS 65 TO 85 MPH.

EF1...WIND SPEEDS 86 TO 110 MPH.

EF2...WIND SPEEDS 111 TO 135 MPH.

EF3...WIND SPEEDS 136 TO 165 MPH.

EF4...WIND SPEEDS 166 TO 200 MPH.

EF5...WIND SPEEDS GREATER THAN 200 MPH.

..TORNADO CONFIRMED NEAR WESTFIELD IN CHAUTAUQUA COUNTY NEW YORK

LOCATION...WESTFIELD IN CHAUTAUQUA COUNTY NEW YORK

DATE...NOV 14 2011

ESTIMATED TIME...505-515 PM EST

MAXIMUM EF-SCALE RATING...EF2

ESTIMATED MAXIMUM WIND SPEED...105-115 MPH

MAXIMUM PATH WIDTH...120 YDS

PATH LENGTH...3.0 MILES BEGINNING

LAT/LON... 42.3024N/79.5929W

ENDING LAT/LON... 42.3095N/79.5366W

* FATALITIES...NONE

* INJURIES...NOE

* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO

CHANGE PENDING FINAL REVIEW OF THE EVENT(S) AND PUBLICATION IN NWS

STORM DATA.

..SUMMARY

THE NATIONAL WEATHER SERVICE IN BUFFALO NY HAS CONFIRMED A TORNADO

NEAR WESTFIELD IN CHAUTAUQUA COUNTY NEW YORK ON NOV 14 2011.

A TORNADO INITIALLY TOUCHED DOWN ON MUNSON STREET IN WESTFIELD

WHERE A ONE-FOOT DIAMETER TREE WAS TOPPED ABOUT EIGHT FEET OFF THE

GROUND. THE TORNADO MOVED WEST ACROSS COUNTY TOURING ROUTE 21. ON

THE WEST SIDE OF THE STREET HALF OF A POLE BARN WAS DESTROYED. A

MAN INSIDE THE BARN AT THE TIME WAS NOT INJURED. ACROSS THE STREET

A THREE STORY BARN WAS DESTROYED. SEVERAL VEHICLES AND BOATS

STORED IN THE BARN WERE DAMAGED. THE TORNADO THEN CROSSED SOUTH

GALE STREET. THREE OUTBUILDINGS WERE DESTROYED. TWO PEOPLE RODE

OUT THE STORM IN A NEARBY VAN AND WERE NOT INJURED. FURTHER ALONG

A BARN WAS DESTROYED ON MARTIN WRIGHT ROAD. SEVERAL LARGE

HARDWOODS WERE SNAPPED AND TWISTED. ALSO ON MARTIN WRIGHT ROAD A

HOME WAS DESTROYED. THE ATTACHED GARAGE AND BACK WALL WERE RIPPED

OFF. AFTER THE FRONT WINDOW WAS BROKEN ON THE HOME THE OPPOSITE

WALL WAS BLOWN OUT. TWO PEOPLE WERE IN THE HOME AT THE TIME

HOWEVER THEY WERE NOT INJURED. THE HOME HAS BEEN DEEMED UNINHABITABLE.

A FEW MORE TREES WERE TOPPED JUST WEST OF THE HOME BEFORE THE

TORNADO LIFTED.

ALTHOUGH THE PATH LENGTH WAS THREE MILES, THE TORNADO WAS NOT ON

THE GROUND THE ENTIRE TIME.

THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT

WEATHER.GOV/BUF.

FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO

THE FOLLOWING CATEGORIES:

EF0...WIND SPEEDS 65 TO 85 MPH.

EF1...WIND SPEEDS 86 TO 110 MPH.

EF2...WIND SPEEDS 111 TO 135 MPH.

EF3...WIND SPEEDS 136 TO 165 MPH.

EF4...WIND SPEEDS 166 TO 200 MPH.

EF5...WIND SPEEDS GREATER THAN 200 MPH.

LEVAN/FISHER

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Thanks for the analysis about the upcoming LES possibilities. Those Tornadoes did quite a bit of damage. I have some friends of mine who I told to get in the basement when they were about to get hit. The Tornado went by 1 mile to there south. Crazy stuff! First time in 60 years a Tornado hit WNY in November. I live in the Town of Hamburg, We should get brushed by the LES on Thurs-Fri. I will be sure to take pictures and post on here!

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Looks like this event wont be too significant. I'm gonna go with a max off Erie of 8 in Perrysburg and Max off Ontario in redfield at 12 inches.

A decent little event but nothing that impressive.

Cut those max totals by a third, IMO....5-6 off Erie....8 for the Tug (I think Redfield is a good choice for the max.)

Winds aloft (shifting and never really aligning "well" and the relatively short duration will keep things in check...

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post-869-0-96147600-1321457895.gif

I think that there will be at least a few hours of heavy snow off of Lake Erie Thursday night as the band drifts southward, with the greatest amounts over the higher terrain. For Lake Ontario, it looks like the greatest snow potential will also be Thursday night into early Friday morning. There will probably be greater accumulations east of Lake Ontario with the greater fetch and possibility of a brief Lake Huron/Georgian Bay connection early Friday morning.

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Cut those max totals by a third, IMO....5-6 off Erie....8 for the Tug (I think Redfield is a good choice for the max.)

Winds aloft (shifting and never really aligning "well" and the relatively short duration will keep things in check...

I'll be in Redfield for the event and will post results ...

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I'll be in Redfield for the event and will post results ...

There is going to be impressiveunidirectional shear on a 280- 290-degree wind orientation; also the differencebetween water and air temps will be 19 degrees C; this is more than enough to generateplenty of instability for lake effect. Right now I'm thinking 6-12 inches with more in spots. Redfield should do very well.

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WWUS41 KBGM 162011

WSWBGM

URGENT – WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE BINGHAMTON NY

311 PM EST WED NOV 16 2011

...A LAKE EFFECT SNOW WATCH IS IN EFFECT FOR NORTHERN ONEIDA COUNTY

FOR LATE THURSDAY INTO FRIDAY MORNING...

.COLD AIR FLOWING OVER THE RELATIVELY WARM WATERS OF LAKE ONTARIO

WILL RESULT IN THE DEVELOPMENT OF SNOW SHOWERS OVER NORTHERN

ONEIDA COUNTY ON THURSDAY. THE SNOW WILL MIX WITH RAIN AT TIMES...

ESPECIALLY OVER LOWER ELEVATIONS. THE HEAVIEST PRECIPITATION WILL

BE MAINLY NORTH AND WEST OF ONEIDA COUNTY DURING THE DAY

THURSDAY... HOWEVER A BAND OF HEAVIER SNOW COULD SHIFT SOUTH TO

NORTHERN ONEIDA COUNTY LATE THURSDAY OR THURSDAY NIGHT. MOST OF

THE ACCUMULATIONS IN NORTHERN ONEIDA COUNTY SHOULD OCCUR THURSDAY

NIGHT... WITH 5 TO 8 INCHES POSSIBLE. THE SNOW WILL TAPER OFF AND

END BY MIDDAY FRIDAY.

NYZ009-172015-

/O.NEW.KBGM.LE.A.0005.111117T2200Z-111118T1500Z/

NORTHERN ONEIDA-

INCLUDING THE CITY OF…BOONVILLE

311 PM EST WED NOV 16 2011

...LAKE EFFECT SNOW WATCH IN EFFECT FROM THURSDAY AFTERNOON

THROUGH FRIDAY MORNING...

THE NATIONAL WEATHER SERVICE IN BINGHAMTON HAS ISSUED A LAKE

EFFECT SNOW WATCH...WHICH IS IN EFFECT FROM THURSDAY AFTERNOON

THROUGH FRIDAY MORNING.

  • LOCATIONS... NORTHERN ONEIDA COUNTY.
  • HAZARDS...HEAVY SNOW.
  • ACCUMULATIONS...5 TO 8 INCHES OF SNOW.
  • TIMING... SNOW SHOWERS WILL DEVELOP ON THURSDAY... MIXED WITH

RAIN AT TIMES... ESPECIALLY AT LOWER ELEVATIONS. THE SNOW WILL

BECOME HEAVIER LATE THURSDAY THROUGH THURSDAY NIGHT... THEN

TAPER OFF ON FRIDAY.

  • TEMPERATURES...IN THE LOWER 30S.
  • WINDS...WEST 10 TO 15 MPH WITH GUSTS UP TO 25 MPH.
  • IMPACTS... HAZARDOUS TRAVEL CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A LAKE EFFECT SNOW WATCH MEANS THERE IS A POTENTIAL FOR A LARGE

AMOUNT OF SNOW IN ONLY A FEW HOURS. VISIBILITIES AND DEPTH OF

SNOW CAN VARY GREATLY...IMPACTING TRAVEL SIGNIFICANTLY. CONTINUE

TO MONITOR THE LATEST FORECASTS.

&&

$$

MSE

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You missed the Two Tornadoes "Tornado" Girl! Here is the damage reports. 2 F2 Tornadoes hit yesterday about 30 minutes from where I live.

http://www.erh.noaa....4/indextor.html

http://www.erh.noaa....chautauqua.html

Yeah...I saw some of the info................Thanks for the links.

I have some data on the tornadoes on my facebook weather page....as well as a little on tomorrows LES event.

https://www.facebook...254982781215764

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Looks like CNY could be the winner for the 1st lake effect of the season.

URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE BINGHAMTON NY

424 AM EST THU NOV 17 2011

...FIRST SIGNIFICANT LAKE EFFECT EVENT OF THE SEASON...

COLD AIR FLOWING OVER THE RELATIVELY WARM WATERS OF LAKE ONTARIO

WILL RESULT IN LAKE EFFECT SNOW OVER ONEIDA COUNTY LATE THIS

AFTERNOON THROUGH TONIGHT...LINGERING INTO FRIDAY MORNING. THE

SNOW WILL BE HEAVY AT TIMES...LEADING TO HAZARDOUS TRAVEL CONDITIONS.

NYZ037-180930-

/O.NEW.KBGM.LE.Y.0014.111117T2000Z-111118T1600Z/

SOUTHERN ONEIDA-

INCLUDING THE CITIES OF...UTICA...ROME

424 AM EST THU NOV 17 2011

...LAKE EFFECT SNOW ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON

TO 11 AM EST FRIDAY...

THE NATIONAL WEATHER SERVICE IN BINGHAMTON HAS ISSUED A LAKE

EFFECT SNOW ADVISORY...WHICH IS IN EFFECT FROM 3 PM THIS

AFTERNOON TO 11 AM EST FRIDAY.

* LOCATIONS...SOUTHERN ONEIDA COUNTY.

* HAZARDS...BURSTS OF HEAVY SNOW.

* ACCUMULATIONS...3 TO 7 INCHES OF SNOW.

* TIMING...SHOWERS WILL INITIALLY BE RAIN OR MIXED RAIN AND SNOW

THIS AFTERNOON...BUT WILL TRANSITION TO BURSTS OF ACCUMULATING

SNOW BY LATE AFTERNOON. THE HEAVIEST LAKE EFFECT SNOW BAND IS

EXPECTED TO SHIFT FROM NORTHERN ONEIDA COUNTY LATE THIS

AFTERNOON...INTO THE REMAINDER OF ONEIDA COUNTY TONIGHT. SNOW

SHOWERS WILL GRADUALLY DIMINISH FRIDAY MORNING.

* TEMPERATURES...FALLING FROM THE 30S LATE AFTERNOON...INTO THE

MID TO UPPER 20S TONIGHT.

* WINDS...WEST 10 TO 20 MPH WITH GUSTS UP TO 25 MPH.

* IMPACTS...DIFFICULT TRAVEL CONDITIONS.

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