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Area forecast discussion 
National Weather Service Albany New York
1244 am EST Monday Jan 26 2015

Synopsis...
with cold temperatures already in place...clouds will
increase overnight. A high impact coastal storm is expected to
affect the region Monday afternoon through Tuesday bringing
accumulating snow...some of which may be heavy...across eastern
parts of the area. Cold weather will follow the storm...with some
additional snow possible late in the week.

&&

Near term /until 6 am this morning/...
as of 1230 am EDT...still a little northwest wind mainly east of the
Hudson Valley...with little or no wind elsewhere. Temperatures were
dropping but not quite as fast as they could as the high clouds from
the developing upstream system were racing in with an upper level
jet.

Very little to change with update...just tweaking the hourly grids
based on current trends.

Despite these clouds...it will be another cold night with lows in
the single digits and teens across majority of the forecast area.
Some below zero readings look to occur for the Adirondacks. Most
areas look to be mostly cloudy by daybreak Monday.

&&

Short term /6 am this morning through Tuesday night/...
significant Nor'easter to impact region...with snowfall
accumulations of a foot plus from the capital district and
south and East.

Litchfield County has been upgraded to a Blizzard Warning. Looking
for total snowfall accumulations of 20 to 30 inches along with
blowing and drifting of snow and northerly winds increasing to
20 to 30 miles per hour and gusts up to 40 miles per hour.

The Winter Storm Watch has been upgraded to warning...expect for
northern Warren County which remains a watch.

The warning has been segmented into two parts. Part one is for
eastern Catskills...middle Hudson Valley...Taconics... Berkshires...and
southern Vermont where 1 to 2 feet of snow is expected along blowing
and drifting snow and northerly winds increasing to 10 to 20 miles per hour and
gusts up to 30 miles per hour. Part two is for the greater capital
region...helderbergs...Schoharie County...Saratoga region...Glens
Falls area and northern Washington County for 8 to 14 inches.

Along with northern Warren County still in a watch we have added
Fulton and Montgomery counties.

Rapid cyclogenesis with occur Monday off the middle Atlantic coast
as northern stream energy phases into the system with an upper
level low cutting off Monday evening. This will result in intense
deepening of the surface low and keeping it closer to the coast as
well as slowing it movement. The low become is expected to become
nearly stationary and wobble near Mont auk point/Cape Cod Tuesday.

There is a lot of moisture/quantitative precipitation forecast with this system. Have used the quantitative precipitation forecast
guidance from the weather prediction center for the forecast. This
gives US around 2 inches across southern Litchfield...an inch into
the southern reaches of the capital district with amounts dropping
off as you head northwest with around a quarter inches across
northern Herkimer and northern Hamilton counties. All snow for this
storm...with fairly high ratios of around 14:1 to 15:1.

Snowfall gradient with this storm will be across our forecast area.
A graphic of our forecast total snowfall is available on our web
Page under news headlines.

&&

Long term /Wednesday through Sunday/...
active long term period expected with increasing potential for
another storm system to produce accumulating snowfall across the
region Thursday into Friday.

Wednesday into Thursday morning...the start of the long term period
will feature quiet conditions in the wake of the powerful Nor'easter
as high pressure ridges across the forecast area. This will result
in a period of dry weather Wednesday and Wednesday night. High
temperatures Wednesday look to range from the middle teens to middle 20s.
For collaboration...low temperatures Wednesday night are currently
forecast to range from 5 below zero to 5 above...but with a recent
fresh and deep snowpack likely to be in place with light
winds...actual low temperatures may be well below zero across much
of the forecast area.

Thursday morning through Friday...attention then shifts to another
clipper system that is becoming increasingly likely to impact the
forecast area with another round of accumulating snowfall Thursday
into Friday. This clipper system looks to be dominated by another
potent pv anomaly in the northern stream as it dives southeast from
the Great Lakes region. There are hints in the long range guidance
of yet another coastal low developing off the middle-Atlantic
coast...and tracking up the eastern Seaboard as energy from the
clipper transfers to the coastal low Thursday night into Friday.

While there are signals of coastal development...it is still several
days out with a good deal of uncertainty regarding whether coastal
development will occur...and how close to the coast if it does. At
the very least...a period of light to perhaps moderate snow
accumulations is becoming increasingly likely Thursday into Friday
with additional enhancement possible if a coastal low were to
actually develop.

It should be noted that this system will not be as
strong as the noreaster affecting the near and short term
periods...as this system looks to be northern stream dominated with
little...if any southern stream influence. Regardless...this system
bears watching and will be highlighted in the hazardous weather
outlook.

High temperatures Thursday and Friday will range from the low 20s to
low 30s with low temperatures Thursday night ranging from the middle
teens to low 20s.

Friday night through Sunday...behind the potential system that may
affect the region Thursday into Friday...the region will be
underneath a deamplifying upper-level trough with embedded pieces of
weak energy rotating through it. For the weekend...Saturday looks to
be dry as high pressure attempts to ridge in from the Ohio Valley. A
weak and moisture-starved system looks to approach the area Sunday
with a slight chance of snow showers.

High temperatures Saturday and Sunday will range from the single
digits to upper teens with lows Friday and Saturday night ranging
from 10 below zero to the single digits.

&&

Aviation /06z Monday through Friday/...
VFR conditions are expected overnight with increasing amounts of
middle and high level clouds through the night. Light north-NE winds
will be evolving overnight through Monday morning. Ceilings will
lower from south to north near 10 kft after sunrise...and become
broken-overcast at 4-6 kft by the late morning hours.

Snow look to develop over the region from south to north on
Monday afternoon. Although a short 1-3 hour period of MVFR
snow...snow will become IFR at all sites. More intense snowfall is
expected by sunset and overnight hours. LIFR conditions developing
for kpou-kpsf Monday night. NE winds will continue to strengthen
through the day and start to become gusty at kpou towards evening.

Outlook...

Monday night: high operational impact. Definite snow.
Tuesday: high operational impact.Breezy definite snow.
Tuesday night: moderate operational impact. Chance of snow.
Wednesday: no operational impact. No sig weather.
Wednesday night: no operational impact. No sig weather.
Thursday: moderate operational impact. Chance of snow.
Thursday night: moderate operational impact. Chance of snow.
Friday: moderate operational impact. Chance of shsn.

&&

Hydrology...
no significant Hydro problems are expected through the middle of the
week. The precipitation that does occur will be in the form of snow.
A significant snowfall will occur Monday night and Tuesday across
western New England and most of east central New York.

Ice will continue to thicken on rivers...streams...creeks...lakes
and other bodies of water.

The Eagle bridge gage on the hoosic river continues to be hampered
by ice effects.

For details on specific area rivers and lakes...including observed
and forecast river stages and lake elevations...please visit the
advanced hydrologic prediction service /ahps/ graphs on our website.

&&

Aly watches/warnings/advisories...
CT...Blizzard Warning from 1 PM this afternoon to 1 am EST
Wednesday for ctz001-013.
New York...Winter Storm Warning from 1 PM this afternoon to 1 am EST
Wednesday for nyz041-043-047>054-058>061-063>066-083-084.
Winter Storm Watch from this afternoon through late Tuesday
night for nyz039-040-042-082.
Massachusetts...Winter Storm Warning from 1 PM this afternoon to 1 am EST
Wednesday for maz001-025.
Vermont...Winter Storm Warning from 1 PM this afternoon to 1 am EST
Wednesday for vtz013>015.

&&

$$
Synopsis...iaa/frugis
near term...iaa/frugis/hwjiv
short term...iaa
long term...irl
aviation...bgm
hydrology...iaa



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