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November 23 - Storm Threat


powderfreak

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This may be the first night we break 20F here, Cold high.........ftw

Yeah already 24F outside and its only 5:45pm... Borderwx said in the NNE thread that he is now under 20F.

Check out the BTV WRF, lol. This model knows the topography and look at the spine of the Greens with 1.5-2" QPF. This is only a 12-hour total, too.

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It's a beautiful dance he does. He congratulates everyone else for being the jackpot on the 00z JMA. When it looks more likely that GC will get in on the action he openly frets about the diminishing QPF (Messenger does his best to fan these flames by constant posting about the SE trend and convective feedback.) Then as the precip breaks out to our SW he fixates on the radar looking too spotty or wrong trajectory. Then come the excited posts between he and I as the heavy snow sets up over us. After houirs of SN+ obs he falls asleep and then awakens to make astonished posts about the new 24" that has fallen. It really is a wonderful thing and I look forward to it repeating over and over again this Winter.

That's about rigiht. :)

Unfortuatnely, I really don't see this one being in our wheelhouse.

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It's a beautiful dance he does. He congratulates everyone else for being the jackpot on the 00z JMA. When it looks more likely that GC will get in on the action he openly frets about the diminishing QPF (Messenger does his best to fan these flames by constant posting about the SE trend and convective feedback.) Then as the precip breaks out to our SW he fixates on the radar looking too spotty or wrong trajectory. Then come the excited posts between he and I as the heavy snow sets up over us. After houirs of SN+ obs he falls asleep and then awakens to make astonished posts about the new 24" that has fallen. It really is a wonderful thing and I look forward to it repeating over and over again this Winter.

You should mention the hundreds of HRRR posted by messenger to support his hypothesis ;)

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HPC'S take......

...NORTHERN NEW ENGLAND...

SOUTHERN STREAM WAVE CURRENTLY MOVING NORTHEASTWARD ACROSS THE

SOUTHERN PLAINS IS EXPECTED TO TRACK EAST-NORTHEAST ACROSS THE

NORTHERN MID ATLANTIC AND SOUTHERN NEW ENGLAND ON WEDNESDAY AND

ACROSS THE GULF OF MAINE WEDNESDAY NIGHT...EARLY THURSDAY MORNING.

OVER THE PAST 3-4 DAYS...A SLIGHT SOUTHWARD TREND OF THE SURFACE

FEATURE DEVELOPING IN THE UPPER OHIO VALLEY LENDS ITSELF TO THE

NOTION THAT THE COLD SURFACE RIDGE IN PLACE AND THE PROJECTED

HEAVY SNOWFALL FORECAST OVER THE GREEN/WHITE MOUNTAINS...NORTHERN

ADIRONDACKS AND ACROSS CENTRAL MAINE WERE IN GOOD ORDER AS COLD

ADVECTION MOVES EASTWARD ACROSS THE EASTERN GREAT LAKES/NORTHEAST

BEHIND THE WAVE.

WITH THE SUBTLE SHIFT IN THE SURFACE WAVE TRACK...MORE UP GLIDE

FROM OCEAN TO INLAND AREAS OVER PARTS OF SOUTHERN NEW

ENGLAND...AND PROGS/MODELS RAMPED UP THE FRONTOGENETIC FORCING

BETWEEN H85-H7 FROM UPSTATE NEW YORK EASTWARD TO DOWNEAST MAINE.

THE OVERALL INCREASE IN BANDING TO THE NORTHWEST OF THE SURFACE

LOW TRACK...FROM AN AREAL AND INTENSITY STANDPOINT...WAS THE

PRIMARY REASONING BEHIND INCREASING THE PROBABILITIES OF

SIGNIFICANT SNOWFALL OVER THE SOUTHERN 2/3RD OF MAINE...INCLUDING

A 12+ INCH CONTOUR ACROSS THE ENTIRE CENTRAL PORTION OF

MAINE...AND EXPANDING THE PROBABILITIES OF 8+ INCHES WESTWARD INTO

NORTHEAST NEW YORK AND NORTHERN VT/NH. HPC SNOW GRAPHICS USED THE

18Z HPC 6-HOURLY QPFS AND CONTINUED TO USE THE ECMWF/NAM GUIDANCE

FOR NORTHERN STREAM INTERACTIONS AND THERMALS.

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HPC'S take......

...NORTHERN NEW ENGLAND...

SOUTHERN STREAM WAVE CURRENTLY MOVING NORTHEASTWARD ACROSS THE

SOUTHERN PLAINS IS EXPECTED TO TRACK EAST-NORTHEAST ACROSS THE

NORTHERN MID ATLANTIC AND SOUTHERN NEW ENGLAND ON WEDNESDAY AND

ACROSS THE GULF OF MAINE WEDNESDAY NIGHT...EARLY THURSDAY MORNING.

OVER THE PAST 3-4 DAYS...A SLIGHT SOUTHWARD TREND OF THE SURFACE

FEATURE DEVELOPING IN THE UPPER OHIO VALLEY LENDS ITSELF TO THE

NOTION THAT THE COLD SURFACE RIDGE IN PLACE AND THE PROJECTED

HEAVY SNOWFALL FORECAST OVER THE GREEN/WHITE MOUNTAINS...NORTHERN

ADIRONDACKS AND ACROSS CENTRAL MAINE WERE IN GOOD ORDER AS COLD

ADVECTION MOVES EASTWARD ACROSS THE EASTERN GREAT LAKES/NORTHEAST

BEHIND THE WAVE.

WITH THE SUBTLE SHIFT IN THE SURFACE WAVE TRACK...MORE UP GLIDE

FROM OCEAN TO INLAND AREAS OVER PARTS OF SOUTHERN NEW

ENGLAND...AND PROGS/MODELS RAMPED UP THE FRONTOGENETIC FORCING

BETWEEN H85-H7 FROM UPSTATE NEW YORK EASTWARD TO DOWNEAST MAINE.

THE OVERALL INCREASE IN BANDING TO THE NORTHWEST OF THE SURFACE

LOW TRACK...FROM AN AREAL AND INTENSITY STANDPOINT...WAS THE

PRIMARY REASONING BEHIND INCREASING THE PROBABILITIES OF

SIGNIFICANT SNOWFALL OVER THE SOUTHERN 2/3RD OF MAINE...INCLUDING

A 12+ INCH CONTOUR ACROSS THE ENTIRE CENTRAL PORTION OF

MAINE...AND EXPANDING THE PROBABILITIES OF 8+ INCHES WESTWARD INTO

NORTHEAST NEW YORK AND NORTHERN VT/NH. HPC SNOW GRAPHICS USED THE

18Z HPC 6-HOURLY QPFS AND CONTINUED TO USE THE ECMWF/NAM GUIDANCE

FOR NORTHERN STREAM INTERACTIONS AND THERMALS.

They neglected to reference Mt. Tolland in their discussion about the shift south. Probably an oversight.

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URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE ALBANY NY

420 PM EST MON NOV 21 2011

NYZ033-042-043-083-VTZ013>015-221000-

/O.NEW.KALY.WS.A.0012.111123T0500Z-111124T0500Z/

HAMILTON-NORTHERN WARREN-NORTHERN WASHINGTON-SOUTHEAST WARREN-

BENNINGTON-WESTERN WINDHAM-EASTERN WINDHAM-

INCLUDING THE CITIES OF...SPECULATOR...WARRENSBURG...WHITEHALL...

GRANVILLE...GLENS FALLS...WEST GLENS FALLS...BENNINGTON...

JACKSONVILLE...NEWFANE...BRATTLEBORO...WEST BRATTLEBORO...

BELLOWS FALLS

420 PM EST MON NOV 21 2011

...WINTER STORM WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH

WEDNESDAY EVENING...

THE NATIONAL WEATHER SERVICE IN ALBANY HAS ISSUED A WINTER STORM

WATCH...WHICH IS IN EFFECT FROM LATE TUESDAY NIGHT THROUGH

WEDNESDAY EVENING.

* LOCATIONS...THE SOUTHEASTERN ADIRONDACKS AND UPPER HUDSON

VALLEY OF NEW YORK...AND THE SOUTHERN GREEN MOUNTAINS OF

VERMONT.

* HAZARD TYPES...MODERATE TO HEAVY WET SNOW MIXING WITH SLEET.

* ACCUMULATIONS...5 TO 10 INCHES OF SNOW ACROSS THE ADIRONDACKS

AND UPPER HUDSON VALLEY. 8 TO 12 INCHES OVER THE SOUTHERN GREEN MOUNTAINS.

* TIMING...RAIN WILL MOVE SOUTH TO NORTH ACROSS NEW YORK STATE AND

ADJACENT WESTERN NEW ENGLAND...CHANGING TO A WINTRY MIX...THEN

ALL WET SNOW IN THE HIGHER TERRAIN TUESDAY EVENING. SNOW WILL

MIX WITH RAIN AND SLEET DURING THE DAY WEDNESDAY...TAPERING OFF

WEDNESDAY EVENING AS SNOW.

* IMPACTS...MODERATE TO HEAVY SNOW AND SLEET WILL MAKE FOR

HAZARDOUS TRAVEL CONDITIONS. ISOLATED POWER OUTAGES MAY RESULT

FROM FALLEN TREE LIMBS.

* WINDS...WILL INCREASE OUT OF THE NORTH EARLY WEDNESDAY...WITH

SUSTAINED WIND SPEEDS 15 MPH TO 20 MPH AND GUSTS UP TO 30 MPH

WEDNESDAY AFTERNOON.

* TEMPERATURES...NEAR FREEZING OVERNIGHT.

* VISIBILITIES...REDUCED TO LESS THAN ONE MILE AT TIMES.

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Still is a tough call for heaviest snow. I still like Sunday river area down to nrn NH..maybe IZG area or so? Also, nrn VT should get hit good. However, SREFs are pretty far south with a very sharp QPF gradient.

The IZG area was consistently coming up as a hot spot with everything I looked at. Pretty good banding signature in that area as well.

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Still is a tough call for heaviest snow. I still like Sunday river area down to nrn NH..maybe IZG area or so? Also, nrn VT should get hit good. However, SREFs are pretty far south with a very sharp QPF gradient.

I think I agree. Maybe the N. Conway-Tamworth area may be the SW extent of the heaviest axis. What's your feeling for here? Looks like I'm right on the sharp gradient...I could see 1-2" or 4-7" depending on how things break.
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The IZG area was consistently coming up as a hot spot with everything I looked at. Pretty good banding signature in that area as well.

They looked good on the euro too...iirc it might have gotten touchy above 850. But yeah from them maybe up to Sunday River/ Rangeley and ENE through Bingham area look nice. Should avoid a DS for now, and maybe get into the backside band as this moves ENE.

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