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Forecast/storm discussions and part II Manitoba Mauler


Damage In Tolland
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Haven't even looked at Euro yet but BOX says game for on W MA!

URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE TAUNTON MA

353 AM EST MON JAN 26 2015

...A CRIPPLING AND POTENTIALLY HISTORIC BLIZZARD WILL IMPACT THE

AREA MAINLY FROM LATE TODAY INTO TUESDAY...LINGERING INTO EARLY

WEDNESDAY...

MAZ002>004-008>011-026-261700-

/O.CON.KBOX.WS.W.0003.150127T0000Z-150128T0600Z/

WESTERN FRANKLIN MA-EASTERN FRANKLIN MA-NORTHERN WORCESTER MA-

WESTERN HAMPSHIRE MA-WESTERN HAMPDEN MA-EASTERN HAMPSHIRE MA-

EASTERN HAMPDEN MA-NORTHERN MIDDLESEX MA-

INCLUDING THE CITIES OF...CHARLEMONT...GREENFIELD...ORANGE...

BARRE...FITCHBURG...CHESTERFIELD...BLANDFORD...AMHERST...

NORTHAMPTON...SPRINGFIELD...AYER

353 AM EST MON JAN 26 2015

...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THIS EVENING

TO 1 AM EST WEDNESDAY...

* LOCATIONS...PORTIONS OF WESTERN AND CENTRAL MASSACHUSETTS.

* HAZARD TYPES...HEAVY SNOW ALONG WITH CONSIDERABLE BLOWING AND

DRIFTING SNOW. NEAR BLIZZARD CONDITIONS ARE POSSIBLE.

* ACCUMULATIONS...SNOW ACCUMULATIONS OF AROUND 20 TO 30 INCHES...

WITH LOCALLY HIGHER AMOUNTS. SNOWFALL RATES OF 2 TO 4 INCHES AN

HOUR AT TIMES.

* TIMING...WHILE THE STORM IS EXPECTED LATE TODAY LINGERING INTO

EARLY WEDNESDAY...THE WORST OF THE STORM WILL BE TONIGHT

THROUGH TUESDAY AFTERNOON.

* IMPACTS...HEAVY SNOW AND STRONG WINDS MAY RESULT IN WHITE-OUT

/ BLIZZARD CONDITIONS WITH NEAR ZERO VISIBILITY AT TIMES.

TRAVEL WILL BE DIFFICULT TO NEAR IMPOSSIBLE AND LIFE-

THREATENING ACROSS THE ENTIRE REGION.

* WINDS...NORTH-NORTHEAST 15 TO 25 MPH WITH GUSTS AROUND 35 TO

45 MPH. THE HEIGHT OF THE WINDS WILL BE LATE MONDAY NIGHT INTO

TUESDAY.

* VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN AN AVERAGE OF 6 OR MORE

INCHES OF SNOW IS EXPECTED IN A 12 HOUR PERIOD...OR FOR 8 OR MORE

INCHES IN A 24 HOUR PERIOD. TRAVEL WILL BE SLOW AT BEST ON WELL

TREATED SURFACES...AND QUITE DIFFICULT ON ANY UNPLOWED OR

UNTREATED SURFACES.

ALL UNNECESSARY TRAVEL IS DISCOURAGED BEGINNING MONDAY

AFTERNOON... TO ALLOW PEOPLE ALREADY ON THE ROAD TO SAFELY REACH

THEIR DESTINATION BEFORE THE HEAVY SNOW BEGINS...AND TO ALLOW

SNOW REMOVAL EQUIPMENT TO BEGIN TO CLEAR ROADS.

&&

$$

FOR THE LATEST UPDATES...PLEASE VISIT OUR WEBPAGE AT

WWW.WEATHER.GOV/BOSTON

YOU CAN FOLLOW US ON FACEBOOK AT

WWW.FACEBOOK.COM/NWSBOSTON

YOU CAN FOLLOW US ON TWITTER AT

@NWSBOSTON

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euro was great 24 plus for most

Haven't even looked at Euro yet but BOX says game for W MA


URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
353 AM EST MON JAN 26 2015

...A CRIPPLING AND POTENTIALLY HISTORIC BLIZZARD WILL IMPACT THE
AREA MAINLY FROM LATE TODAY INTO TUESDAY...LINGERING INTO EARLY
WEDNESDAY...

MAZ002>004-008>011-026-261700-
/O.CON.KBOX.WS.W.0003.150127T0000Z-150128T0600Z/
WESTERN FRANKLIN MA-EASTERN FRANKLIN MA-NORTHERN WORCESTER MA-
WESTERN HAMPSHIRE MA-WESTERN HAMPDEN MA-EASTERN HAMPSHIRE MA-
EASTERN HAMPDEN MA-NORTHERN MIDDLESEX MA-
INCLUDING THE CITIES OF...CHARLEMONT...GREENFIELD...ORANGE...
BARRE...FITCHBURG...CHESTERFIELD...BLANDFORD...AMHERST...
NORTHAMPTON...SPRINGFIELD...AYER
353 AM EST MON JAN 26 2015

...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 1 AM EST WEDNESDAY...

* LOCATIONS...PORTIONS OF WESTERN AND CENTRAL MASSACHUSETTS.

* HAZARD TYPES...HEAVY SNOW ALONG WITH CONSIDERABLE BLOWING AND
DRIFTING SNOW. NEAR BLIZZARD CONDITIONS ARE POSSIBLE.

* ACCUMULATIONS...SNOW ACCUMULATIONS OF AROUND 20 TO 30 INCHES...
WITH LOCALLY HIGHER AMOUNTS. SNOWFALL RATES OF 2 TO 4 INCHES AN
HOUR AT TIMES.

* TIMING...WHILE THE STORM IS EXPECTED LATE TODAY LINGERING INTO
EARLY WEDNESDAY...THE WORST OF THE STORM WILL BE TONIGHT
THROUGH TUESDAY AFTERNOON.

* IMPACTS...HEAVY SNOW AND STRONG WINDS MAY RESULT IN WHITE-OUT
/ BLIZZARD CONDITIONS WITH NEAR ZERO VISIBILITY AT TIMES.
TRAVEL WILL BE DIFFICULT TO NEAR IMPOSSIBLE AND LIFE-
THREATENING ACROSS THE ENTIRE REGION.

* WINDS...NORTH-NORTHEAST 15 TO 25 MPH WITH GUSTS AROUND 35 TO
45 MPH. THE HEIGHT OF THE WINDS WILL BE LATE MONDAY NIGHT INTO
TUESDAY.

* VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN AN AVERAGE OF 6 OR MORE
INCHES OF SNOW IS EXPECTED IN A 12 HOUR PERIOD...OR FOR 8 OR MORE
INCHES IN A 24 HOUR PERIOD. TRAVEL WILL BE SLOW AT BEST ON WELL
TREATED SURFACES...AND QUITE DIFFICULT ON ANY UNPLOWED OR
UNTREATED SURFACES.

ALL UNNECESSARY TRAVEL IS DISCOURAGED BEGINNING MONDAY
AFTERNOON... TO ALLOW PEOPLE ALREADY ON THE ROAD TO SAFELY REACH
THEIR DESTINATION BEFORE THE HEAVY SNOW BEGINS...AND TO ALLOW
SNOW REMOVAL EQUIPMENT TO BEGIN TO CLEAR ROADS.

&&

$$


FOR THE LATEST UPDATES...PLEASE VISIT OUR WEBPAGE AT
WWW.WEATHER.GOV/BOSTON

YOU CAN FOLLOW US ON FACEBOOK AT
WWW.FACEBOOK.COM/NWSBOSTON

YOU CAN FOLLOW US ON TWITTER AT
@NWSBOSTON

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a keeper of an AFD from Taunton 341am...

 

some excerpts:

 

Area forecast discussion
National Weather Service Taunton Massachusetts
341 am EST Monday Jan 26 2015

Short term /6 PM this evening through Wednesday/...

*** potentially historic winter storm ramps up tonight ***

* blizzard conditions expected
* up to 2 feet of snow for many areas with higher amounts possible
* damaging winds likely coast especially cape/islands...gusts 60 to 75 miles per hour
* pockets of major coastal flooding possible along the eastern Massachusetts
coast

Overview...
confidence remains high for a historical blizzard impacting
southern New England beginning late in the day today.
However...that does not mean there are not some mesoscale
differences which will need to be monitored as we approaches. At
issue at this point...are differences in the final low pressure depth
prior to the occlusion process ranging from 978 hpa on the NAM/CMC
to 984 on the GFS. At odds also...is the likelihood of two
distinct banded snow features...the first...a long and significant
deformation/f-gen band stretching from coastal main into interior
southern New England...the tip of which could range anywhere from the
CT valley to metropolitan-west and the Merrimack valley. Available WRF
outputs are in disagreement here...with the nmm further west with
the heavier banding...while the arw is suggesting the east. The other
area will likely be form central Rhode Island through about the S shore/bos
metropolitan of mass as a coastal front develops and wavers inland. So it
is likely that there will actually be two bullseyes of snow
totals to watch...where storm total snowfall is likely to exceed 2
feet. Finally...this banding location will likely be dependent on
final track...which are still in some mesoscale-scale dispute with the
GFS remaining more progressive and outside the 40/70 benchmark
while the ecwmf/NAM are just inside and much slower...stalling the
low pressure only about 50 nm southeast of ack. Therefore...the banding and
axis of 2.5-3.0 inch total quantitative precipitation forecast amounts are likely to waver a
bit...and will need to be updated as the event is unfolding.
Will
try to show this two-bullseye snowfall somewhat with this
update...but given that this will be high impact storm across all
of southern New England wholesale changes will note be made.


Total snowfall/blizzard...

As stated there is the likelihood of two banding locations...one
from typical middle-level deformation and negative epv...with the other
closer to the surface in vicinity of of the coastal front across Rhode Island-southeast Massachusetts or
near the I-95 corridor. While nailing these down is difficult
almost 24 hours out...mesoscale models do at the very least
indicate that within either of these bands...dendritic growth will
likely be near a maximum and with bands of very negative epv...2-3
in/hour snowfall amounts within either of these bands are likely
beginning late tonight...and continuing well into the day on Tuesday
as these bands slowly pivot and begin a slow shift to the east. Given
the slow movement...this also suggests that some areas could see
snowfall amounts of about a foot in 6 hours or even less.

Therefore...feel the mention of 2+ feet of total snowfall across
interior to east Massachusetts/Rhode Island and even northern CT is possible...with a few
spots approaching 3 feet not out of the question. Regarding the
blizzards...
BUFKIT mixing profiles still support winds near blizz
criteria along with this potentially heavy snow bands within the
current blizzard warnings...so not planning on making any
adjustments at this time.

With the chance for lower snow ratios nearer to the coastal front
locations...colocated with the stronger winds...will have to watch
portions of southeast Massachusetts /particularly near the coast/ for the higher
likelihood of damage/power outages. Higher ratios further inland
/colder air/ are expected.

It appears ocean enhancement will likely delay the end time
especially for portions of the S shore...southeast Massachusetts and east Rhode Island late Tuesday
into Wednesday...which may snow until after noon on Wednesday. However...by
Tuesday night...expect slowly diminishing snowfall rates from west to east.

Winds...
GFS has backed down a bit on the low level jet...now supporting 65 knots at
h92 from southern Rhode Island through bos and points southeast. However...NAM/ECMWF
continue lean closer to 70-80 knots. BUFKIT mixing profiles support
at least 75-80 percent of this momentum being mixed especially
closer to the coastlines. Therefore...can still support wind gusts
approaching hurricane velocity near the shore...particularly the
outer arm of Cape Cod and Nantucket although this tapers
inland...still could see some wind gusts 50-60 miles per hour as far inland
as Rhode Island and the I-95 corridor. As mentioned above...where this
coincides with lower ratio /more water laden/ snow...could produce
more tree damage and therefore potentially more power outages.

Coastal flooding...
for more on this...please see the coastal flooding section below.

&&

 

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the box discussion is awesome one of the best i read in awhile

Yes, good read. I just went over it to see why, at least in my area, they don't seem to put as much weight in the euro/nam solution. The disco basically says that I could play in the deform band, but their p/c and snowfall graphic suggest not.

Doesn't really matter anyway. Stoked.

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If the western models were to verify, I seriously doubt that the tolland hole would verify. Don't even need to try and rationalize that.

Hey..no need to jack unless that's someone's thing. Of course we'd all love it..but you can't get pissed for getting 24 instead of 36 if you think about it. I know Noyes thinks this area and SE mass..but I have a feeling he's wrong about # 1

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Sorta disappointed at the lack of heavy hitting science in these AFDs tonight.  The plains and midwest offices usually go all out in their AFDs in big-time scenarios.  To be fair, I think the AFD is the flagship product of a lot of central US offices.  Not sure if that's the case out east.  Don't mind me, I'm just browsing your thread.

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most areas it is   gfs shows you the love at 6z we are all going to get it good

No it doesn't. The euro gives me 24+..The Nam 12..

 

Even the normal severely west biased ARW members are east of the NAM lol. That tells you all you need to know.

 

Also the Euro ens are east of the op.so a 25 -30 mile tick east at 12z won't be surprising

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Here is a reason to spike footballs, 9 out of 10 times in this event we should see more snow than this graphic. That's not a bad lower bound.

 

post-44-0-99978900-1422265505_thumb.png

 

A good place to cap it is this graphic, 9 out of 10 times we end up lower than these amounts. This one does show HPC's thinking on the coastal front/OES enhancement jackpot, and the possible location of deformation jackpots.

 

post-44-0-78721900-1422265491_thumb.png

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