Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Williams, MA

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:37AMSunset 7:17PM Wednesday March 29, 2017 1:18 AM EDT (05:18 UTC) Moonrise 7:49AMMoonset 9:16PM Illumination 3% Phase: Waxing Crescent; Moon at 2 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Williamstown CDP, MA
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location: 42.71, -73.2     debug


Area Discussion for - Albany, NY
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Fxus61 kaly 290253
afdaly
area forecast discussion
national weather service albany ny
1053 pm edt Tue mar 28 2017

Synopsis
Rain showers will continue to taper off overnight as the low
pressure system moves off the coast and away from the region.

Dry weather will return for Wednesday and Thursday with
temperatures close to normal under clearing skies. Another storm
system with rain and snow will impact the region Thursday night
into Friday night.

Near term /through Wednesday/
Rain continues to taper off south and east of the capital
district as the low moves offshore. Have some scattered showers
associated with the cold front moving southeastward across the
local area. Even with the passage of the front, clouds should
remain fairly abundant overnight, so despite developing low
level cold advection.

Lows mainly 30s expected by daybreak for most areas, except for
mid/upper 20s across the western and southern adirondacks with
some 20s across the higher terrain of the southern green
mountains into the northern berkshires and in the eastern
catskills.

On Wednesday, models suggest quite a bit of low level moisture may
initially become trapped beneath subsidence inversion through the
morning, leading to areas of clouds, before deeper mixing allows dry
air aloft to eventually become entrained into the lower levels of
the atmosphere. So, mostly cloudy through the morning for most
areas, followed by gradual clearing, first in valleys, last for
higher terrain. There could even be isolated sprinkles/flurries or
patchy drizzle in the morning as mixing first develops.

Afternoon highs should reach the 30s across higher elevations, and
40s for most lower elevations, although some 50s will be possible
across portions of the mid hudson valley where more sunshine and
downsloping should prevail.

Short term /Wednesday night through Friday night/
Wednesday night into Thursday, northwesterly upper-level flow
will be over the northeastern us. Good subsidence will be
working into the local area, reflected in a ridge of high
pressure building in. This will promote tranquil weather and
mainly clear skies with temperatures around seasonal normals.

As the high is not directly overhead Wednesday night, a weak
pressure gradient will be maintained which may prevent temps
from tumbling further.

Thursday night into Friday night, the focus will be on the upper
low that is currently over the desert southwest as it tracks
eastward into the mid-atlantic. Though this wave is expected to
pass well to our south, there will also be some northern-stream
energy tracking roughly along the same longitude and potentially
phasing with the southern stream offshore. The attendant
composite low-level circulation associated with these upper
waves is expected to form across the upper midwest/western great
lakes with a solid low-level jet along its eastern flank.

Moisture transport and isentropic lift from the llj, in tandem
with some contribution from the equatorward entrance region of
the aforementioned upper jet, will allow precipitation to spread
into the local area Thursday night into early Friday. Good
confidence on this scenario, so likely/categorical pops are in
place Thursday night into early Friday night. Thermal profiles
and resultant p-type carry lower certainty. Fairly good
confidence in precip beginning as snow Thursday night due to
cool boundary layer and midlevel wet bulb temps well below zero.

After sunrise Friday, continued positive midlevel warm advection
and diurnal boundary layer warming from the late march Sun will
be battling against cooling due to upward motion and evaporative
effects to edge the rain/snow line northward and toward higher
elevations. For now, areas north of i-90 and above 1000' are
favored for accumulating snowfall continuing into Friday. Will
hone in on the details as we get closer, but for now the message
is that a plowable snowfall is possible even into the valleys
but especially across higher elevations. Will likely need high
rates to allow snow to stick on the roads after sunrise Friday,
but that is a possibility in the favored locations.

More uncertainty Friday night with potential coastal development
potentially prolonging the precip especially east of the hudson
valley. 12z ecmwf/gfs are on opposite sides of the envelope,
with the ECMWF being the stronger/further north solution. For
now, will trend pops down from west to east during the latter
part of the night and continue to monitor.

Long term /Saturday through Tuesday/
The period starts out at the tail end of the system which will be
affecting us on Friday. Dry conditions can be expected through
Monday before a complex system from the west brings rain showers
across the region. The adirondacks and greens may flirt with a
mixture of rain and snow.

Temperatures will start out several degrees below normal but will
climb to near normal by the end of the period. Normal highs in very
early april in albany are in the 50 to 55 degree range, with lows
right around freezing.

Aviation /03z Wednesday through Sunday/
Main continues to taper off south and east of the capital
district as the low moves offshore. Have some scattered showers
associated with the cold front moving southeastward across the
local area. Even with the passage of the front, clouds should
remain fairly abundant overnight, so despite developing low
level cold advection. Ceilings should remain MVFR/ifr through
the overnight into Wednesday morning before drier air builds in
and conditions improve toVFR for the afternoon.

Light north to northeast to calm winds will shift to the north
later tonight at around 5 knots. North to northwest winds will
increase Wednesday becoming brisk and gusty by late morning/
early afternoon. Sustained winds of 13 to 18 knots are expected
with gusts in the 20s for the afternoon into the early evening.

Outlook...

Wednesday night: no operational impact. No sig wx.

Thursday: no operational impact. No sig wx.

Thursday night: moderate operational impact. Chance of sn.

Friday: high operational impact. Definite ra... Sn.

Friday night: high operational impact. Likely shra... Sleet.

Saturday: low operational impact. Slight chance of shra.

Saturday night: no operational impact. No sig wx.

Sunday: no operational impact. No sig wx.

Fire weather
Much of eastern new york and western new england continues to
have snow on the ground. Some of the valley areas have bare
patches, but the mountains have a deep snow pack. High pressure
will build in for the mid-week into Thursday with cooler and
drier weather. Some wind gusts could reach around 25 mph on
Wednesday, although rh values will remain elevated. Rain and
snow are expected again across the region Thursday night into
Friday night.

Hydrology
Rain showers will taper off later this evening. This rainfall,
along with the expected snowmelt, will cause some within bank
rises on rivers and streams. However, this rain and snowmelt is
not likely to produce any concern for flooding at this time.

Current forecasts have a few points getting to close or up to
the ALERT or action stage, but no flooding is forecast at this
time.

Flows will recede Tuesday night through the mid-week with a
cooler and drier air mas building in. Temps are expected to go
below freezing Wed night and Thu night with a normal diurnal
melting of the snowpack in spots.

Some additional precipitation in the form of rain and snow is
expected for Thursday night into Friday night with another
storm system. The area has the potential to see moderate
amounts of precipitation, resulting in river rises. However, the
airmass will be cool, and current mmefs forecasts keep the
forecast sites below flood stage.

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... None.

Ny... None.

Ma... None.

Vt... None.

Synopsis... Iaa/thompson
near term... Iaa/kl
short term... Thompson
long term... Elh
aviation... Iaa
fire weather... Frugis/thompson
hydrology... Frugis/thompson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANMN6 - Hudson River Reserve, NY 61 mi49 min 44°F 1015 hPa43°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
North Adams Harriman-and-West Airport, MA2 mi27 minWNW 77.00 miOvercast39°F37°F93%1015.4 hPa
Bennington Morse State Airport, VT13 mi25 minW 310.00 miOvercast39°F37°F93%1015.2 hPa
Pittsfield Municipal Airport, MA20 mi25 minNNW 410.00 miOvercast39°F37°F96%1013.1 hPa

Wind History from AQW (wind in knots)
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Last 24hrNE3CalmE4SW3E3CalmE45SE7E6E5CalmS3E3SE5E7SE4CalmE3CalmCalmNW55W7
1 day agoE9
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E8E8E6E5SE7SE8E6CalmSE3E4SE4CalmSE3
2 days agoCalmCalmCalmCalmW3E8E11E10E13
G20
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SE7SE10
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E10E10E11SE11E16E15
G24
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G22

Tide / Current Tables for Troy, Hudson River, New York
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Troy
Click for MapNote: Values for the Hudson River above the George Washington bridge are based upon averages for the six months May to October

Wed -- 01:12 AM EDT     0.10 feet Low Tide
Wed -- 06:41 AM EDT     Sunrise
Wed -- 06:48 AM EDT     5.95 feet High Tide
Wed -- 07:51 AM EDT     Moonrise
Wed -- 01:40 PM EDT     0.30 feet Low Tide
Wed -- 07:11 PM EDT     5.71 feet High Tide
Wed -- 07:17 PM EDT     Sunset
Wed -- 09:17 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.10.51.93.755.75.95.44.22.91.91.20.50.41.32.94.45.35.75.54.431.9

Tide / Current Tables for Albany, New York
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Albany
Click for Map
Wed -- 01:02 AM EDT     -0.06 feet Low Tide
Wed -- 06:40 AM EDT     5.80 feet High Tide
Wed -- 06:42 AM EDT     Sunrise
Wed -- 07:51 AM EDT     Moonrise
Wed -- 01:30 PM EDT     0.13 feet Low Tide
Wed -- 07:03 PM EDT     5.56 feet High Tide
Wed -- 07:18 PM EDT     Sunset
Wed -- 09:17 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.4-0.10.523.855.65.85.13.82.51.60.90.30.31.434.45.25.65.24.12.71.6

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Albany, NY (1,6,7,8)
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Ground Weather Radar Station Albany, NY
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weather_mapweather_map weather_map

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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.