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guys and gals. question here, maybe this has been covered in previous posts but call me late in the game here. when's the last time we had a storm come up the coast and actually steer its way into the poconos and up into upstate NY and southern/central ontario with this type of situation? because i know the models are still trending for that when looking at the latest run, but i don't remember the storm track usually going that way with this type of system. usually if anything it would make a bee-line for i-87 or i-91 and make its way towards montreal or quebec city, not head back to kingston ON or even Toronto; at least as i remember things over the years.

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guys and gals. question here, maybe this has been covered in previous posts but call me late in the game here. when's the last time we had a storm come up the coast and actually steer its way into the poconos and up into upstate NY and southern/central ontario with this type of situation? because i know the models are still trending for that when looking at the latest run, but i don't remember the storm track usually going that way with this type of system. usually if anything it would make a bee-line for i-87 or i-91 and make its way towards montreal or quebec city, not head back to kingston ON or even Toronto; at least as i remember things over the years.

Jim,

I agree, the track seems odd to steer this storm so abruptly inland. Some of the model runs today actually pushed precip all the way into Detroit, and I don't see that happening. I think the track parallel to the Hudson River Valley/I-87 is the most likely route for this storm. The 12Z Euro seems to take the parallel route to the river, although it's still a bit west. I had a post earlier today on this thread where I showed the 1928 storm as an analog, and it takes the I-87/91 Route exactly as you described. I'm fascinated watching how this all plays out. Cory

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a little more aggressive with snow amounts in the new watch statement.

PAZ004>006-010-011-017-024-033-037-221200-

/O.CON.KCTP.WS.A.0002.120423T0200Z-120424T1600Z/

WARREN-MCKEAN-POTTER-ELK-CAMERON-CLEARFIELD-CAMBRIA-SOMERSET-

TIOGA-

INCLUDING THE CITIES OF...WARREN...BRADFORD...COUDERSPORT...

ST. MARYS...RIDGWAY...EMPORIUM...DUBOIS...CLEARFIELD...

JOHNSTOWN...SOMERSET...MANSFIELD...WELLSBORO

1035 PM EDT SAT APR 21 2012

...A WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING

THROUGH TUESDAY MORNING...

* LOCATIONS...NORTHERN AND WESTERN MOUNTAINS OF PENNSYLVANIA...

INCLUDING THE LAUREL HIGHLANDS.

* HAZARD TYPES...HEAVY SNOW...ACCOMPANIED BY INCREASING

NORTHERLY WINDS LATE SUNDAY NIGHT AND MONDAY.

* ACCUMULATIONS...8 INCHES OR MORE ACROSS MUCH OF THE WATCH

AREA...WITH OVER ONE FOOT POSSIBLE ACROSS SOME OF THE HIGHER

TERRAIN.

* TIMING...SUNDAY NIGHT THROUGH TUESDAY MORNING.

.LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/...

WILL MAINTAIN THE PREVIOUS WINTER STORM WATCH /ISSUED SAT AFTERNOON/

FOR LATER SUNDAY NIGHT INTO TUE MORNING. THERE IS VERY GOOD

OPERATIONAL MODEL AND ENSEMBLE CONSENSUS FOR THE COMBINATION OF

STRONG MID/UPPER LEVEL LOW AND ASSOC TROUGH GOING NEGATIVE

TILT...LLVL ADVECTION OF COLD AIR FROM THE NORTH TO NE...AND DYNAMIC

COOLING VIA STRONG UPWARD MOTION JUST TO THE NORTH OF THE MID/UPPER

LEVEL CORE. THESE FACTORS WILL TEAM UP TO RESULT IN THE POTENTIAL OF

HEAVY WET/DESTRUCTIVE LATE SEASON SNOW NEAR...AND JUST TO THE WEST

OF THE MEAN 700-500 MB LOW TRACK /WHICH IS PROGGED TO BE RIGHT UP

THE SUSQ VALLEY OR A TAD TO THE WEST DURING THE DAY MONDAY/.

DID NOT EXTEND THE WATCH FURTHER TO THE EAST ATTM...AS THE AIRMASS

WILL BE SLIGHTLY WARMER ALOFT...LESS QPF...AND EAST OF WHERE OTHERS

AND HPC HAS INDICATED CONCERN. LOCATIONS SUCH AS THE MTNS WEST OF

INTERSTATE 99/RT 220 FROM BEDFORD COUNTY...NORTH THROUGH

BLAIR...NORTHERN CENTER AND CLINTON COUNTY COULD EASILY GET IN ON

THE HEAVY SNOW...AS THE TIGHTEST 925-850MB TEMP GRADIENT AND

SLIGHTLY ABOVE FREEZING AIR IN THAT LAYER WILL BE SITUATED NEAR OR

JUST TO THE EAST.

BANDS OF STRONG FRONTOGENESIS/CSI ROTATING NWWD ACROSS ACROSS THE

CWA COULD BRING SOME THUNDER SNOW AFTER MIDNIGHT SUNDAY

NIGHT...THROUGH THE DAY MONDAY. SNOWFALL RATES ACROSS THE NW MTNS

AND LAUREL HIGHLANDS COULD EASILY BE 1-2 INCHES/HOUR AT TIMES.

STORM TOTAL SNOWFALL OVER MUCH OF THE ALLEGHENIES SHOULD EXCEED 8

INCHES...WITH SOME 14-16 INCH AMOUNTS PAINTED IN. UNLESS THINGS

CHANGE DRASTICALLY WITH THE NEXT MODEL RUN...EXPECT WINTER STORM

WARNINGS TO BE ISSUED EITHER ON THE OVERNIGHT SHIFT OR DURING THE

MORNING SUNDAY.

FOR THE SUSQ VALLEY AND PTS EAST...RIGHT NOW IT LOOKS LIKE MAINLY A

CHILLY HEAVY RAIN EVENT OF 1.5 TO 2 INCHES WITH LOCAL 3 INCH AMOUNTS

POSSIBLE.

Snow.png

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how do the models keep bringing the low inland like they do? just puzzles me with that type of setup. but unless i see the trend otherwise...

The Jets Phase...Your a Met, you should know this! =P

ON SUN...NRN STREAM SHORTWAVE DIGS SE ACROSS THE OH AND TN

VLYS...WHILE THE SRN STREAM WAVES LIFTS NE ACROSS NRN FL AND OFF

THE SE COAST. THESE TWO WAVES WILL THEN PHASE SUN NIGHT/MON

AM...THEREBY ACCELERATING THE CYCLOGENESIS ALONG THE MID ATLC

COAST. THE MODELS CONTINUE TO DEPICT AN INLAND...NORTHWARD TRACK

OF THE DEEPENING LOW...WITH THE H7-H5 TRACK FROM THE INTERIOR MID

ATLC REGION (CEN/NRN VA) NORTHWARD THROUGH CEN PA/NY. GIVEN THE

INTENSIFICATION/AMPLIFICATION OF THE SYSTEM AND EVENTUAL NEGATIVE

TILT WITH THE UPPER TROUGH SUN NIGHT AND MON...MODELS CONTINUE TO

SHOW STRENGTHENING COUPLED JET DYNAMICS WITH INCREASING MID LEVEL

DEFORMATION/QVECTOR CONVERGENCE AND ASSCD

FRONTOGENETICALLY-ENHANCED PCPN DEVELOPING ACROSS THE CEN WV NORTH

THROUGH WRN PA/WRN NY. COLD AIR AVAILABILITY WITH THIS SYSTEM IS

MARGINAL AT BEST FOR WIDESPREAD...HEAVY SNOWFALL (LARGELY DUE TO

THE TIME OF YEAR)...AS 850 MB TEMPS ARE PROJECTED TO BOTTOM OUT IN

THE -3 TO -6C RANGE (OR CLOSE TO 2 STD DEVS BELOW NORMAL).

MEANWHILE...MODELS BRING WET BULB ZERO HEIGHTS OF 2000 FT MSL OR

LOWER ACROSS WRN NY/PA...ERN OH...WV...AND ACROSS WRN MD/VA

THROUGH THE DAY ON MON. NOT SURPRISING WITH THE FRONTOGENETIC

POTENTIAL WITH THIS SYSTEM...THE MODELS (BOTH NAM/GFS) CONTINUE TO

SHOW NEGATIVE EPV'S WITHIN THE 800-600 MB LAYER AND THUS THE

POTENTIAL FOR EMBEDDED ELEVATED CONVECTION OVER WRN

PA...SUPPORTING THE POTENTIAL FOR HEAVY...CONVECTIVELY-ENHANCED

SNOWFALL RATES OVER THAT REGION.

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