Saturday, January19, 2019 L-36.com


Marine Weather and Tides
Willsboro, NY

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:21AMSunset 4:45PM Saturday January 19, 2019 9:56 PM EST (02:56 UTC) Moonrise 4:11PMMoonset 6:46AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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 Willsboro, NY
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location: 44.32, -73.32     debug


Area Discussion for - Burlington, VT
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Fxus61 kbtv 200213
afdbtv
area forecast discussion
national weather service burlington vt
913 pm est Sat jan 19 2019

Synopsis
A dangerous winter storm is on tap for the north country
tonight through Sunday as low pressure over the ohio valley
tracks to near new york city by Sunday morning, and into the
gulf of maine by Sunday evening. Steady snow will develop across
the region through this evening, and become heavy at times
overnight into Sunday morning. Snowfall rates of 1 to 2 inches
per hour are expected, making for hazardous travel. As low
pressure departs to our east across the gulf of maine and
canadian maritimes, blowing snow will increase throughout the
day Sunday as north winds increase. Frigid temperatures and very
low wind chills are also expected tonight through Monday night,
adding to the hazardous conditions. Temperatures will moderate
back into the teens on Tuesday, and into the low to mid 30s for
Wednesday of next week.

Near term through Sunday night
As of 913 pm est Saturday... Overall, the forecast for the
upcoming winter storm remains on track. Many locations have seen
a lull or lighter snowfall over the past few hours but the
leading edge of the system is just beginning to enter our
forecast area. The heaviest snowfall is still expected to fall
after midnight through the early morning hours on Sunday. Latest
hi-res guidance continues to show an impressive mesoscale
banding feature developing in response to impressive 850 mb and
700 mb frontogenesis coupling. Wherever this band sets-up over
and pivots over will likely be the winner in terms of total snow
accumulations. All guidance is suggesting this will occur
somewhere over central vermont between 08z and 14z.

Temperatures continue to remain tricky as the low levels
continue with a stout northerly wind which is advecting colder
air down from canada. However, at higher elevations, southerly
winds are advecting warmer air into the region. Surface
temperatures will be slow to respond as scouring out this colder
air will take some time while higher elevations will likely
continue to see gradual warming through the overnight period.

These temperatures will likely influence our snow ratios as
temps at or below zero don't typically support high snow to
liquid ratios. This could end up leading to slightly less snow
in some locations but be a higher density snowfall.

Previous discussion... Have upgraded the st. Lawrence
valley to a winter storm warning, and winter storm warnings
remain on track elsewhere.

Rather amazing snow event underway across the north country,
even as low-level arctic continues to filter southward out of
sern ontario and SRN quebec. Temperatures at btv have been
slowly falling all day, from about 1f at 13z to -4f at 2030z, on
northerly winds around 10 mph. True arctic air mass with
dewpoints -10f to -20f across northern sections of the cwa. Also
seeing wind chill values of 10 to 20 below, making for
dangerous outdoor conditions with frostbite risk.

Even as this has occurred, we've seen 850-700mb frontogenesis
forcing in the frontal zone result in developing light to
moderate snowfall well in advance of the sfc low across the
lower ohio valley during the early afternoon hours. Snow
crystals are very fine - mainly needles - likely a combination
of being colder than favorable dendrite growth zone and
sublimation processes ongoing in the sub-cloud layer. We'll be
"fighting" the replenishment of shallow arctic air throughout
this major snowfall, as north winds increase, especially Sunday
and with observed dewpoints in the -20f to -30f range around
montreal and points north! As a result of the crystal type
(small columns and needles), visibilities will likely be very
low throughout the event, with 1 4sm to 1 2sm vsby common during
the next 24hrs due to snow and blowing snow across the forecast
area.

The 12z nwp guidance suite indicated a northward shift in the
sfc low track and best 850-700mb frontogenesis forcing. This is
unusual given the ongoing low-level CAA (short wavelength
between systems), and thinking is that the above freezing layer
in the 850-750mb layer and potential p-type mixing is too
extreme in the 12z nam. The rest of the guidance is less nam-y,
but could see a S ip mix from 13-18z Sunday across
rutland windsor counties, and changed the forecast in s-central
vt with this package accordingly. Otherwise, looking at an all
snow event central vt and points north and west.

Overall QPF has also increased, especially across northern vt
and northern ny. As a result snowfall has been increased for
northern zones, and decreased slightly for rutland windsor
counties as S ip mix reduces frozen ratio. Have upgraded the st.

Lawrence valley to a winter storm warning with this package,
with 8-12" generally expected there. The remainder of the CWA is
in the 12-18" range, and good potential for 1-2" snowfall rates
9-15z Sunday morning with best frontogenesis forcing as low-
level wind fields increase around deepening low pressure passing
to our south. Have lowered snow ratios down as low as 12:1, but
not expecting the snow to be clinging to trees and powerlines
given ambient surface temperatures. Thus, power outage threat is
low with this event.

For impacts, mainly looking at significant to dangerous travel
conditions cwa-wide late tonight through Sunday morning. This
will be because of 1-2" hr snowfall rates and wind chills of 10
to 20 below, especially across northern sections. Blowing and
drifting will also increase on Sunday morning. Travel is
generally not advised due to the dangerous cold and poor road
conditions low visibility overnight into Sunday morning.

Snowfall will gradually taper off Sunday afternoon into Sunday
night, but will see continued orographic snow, and even some
lake effect off lake champlain continuing. North winds 15-25
mph, with gusts to 35 mph, will maintain blowing and drifting
snow through Sunday night as low pressure moves into the
canadian maritimes. Frigid temperatures across the region Sunday
night, generally 5 to 15 below zero, with wind chills 20-35
below.

Short term Monday through Monday night
As of 319 pm est Saturday... Dangerously cold wind chill expected
Monday morning with values between 20 to 40 below zero. Areas
of blowing and drifting snow continue into Monday with chances
for snow showers across the northern mountains, and near lake
champlain.

It continues to appear that the 925mb temperatures drop to
between -25c and -30c Monday morning, and p-gradient remains
moderately strong on western periphery of departing low
pressure. It will be dangerous cold with highs only -5f to +5f,
and wind chills far below zero. May see an additional 1-2" snow
accumulation across the champlain valley and into
n-central nern vt with continued orographic snow shower
activity.

As 1038mb sfc anticyclone builds in Monday night, will finally
see snow showers end with gradually clearing skies. If winds
decouple with deep fresh snow pack and clear skies, expect
temps to quickly fall during the pre-dawn hours Tuesday.

Currently have forecast -10f to -25f, coldest in the northern
adirondacks and across nern vt.

Long term Tuesday through Saturday
As of 253 pm est Saturday... Active weather anticipated for the long
term, though we will be trending warmer. Tuesday will be the
quietest day with high pressure cresting over the region in the
morning, then shifting east through the afternoon and evening hours.

As such, we'll finally see a reprieve from the bitter cold as flow
turns to the southwest. Our next system arrives Tuesday night into
Wednesday, as low pressure slides up along or just north of the st
lawrence valley and drags its attendant cold front through the north
country. Warm air advection snow starts Tuesday night and continues
through Wednesday, with some rain possibly mixing in across the
wider valleys as temperatures warm into the lower mid 30s.

Uncertainty grows Wednesday night onward as another low is progged
to slide along the front which will be positioned somewhere in the
new england vicinity. Timing and position differ significantly on
this frontal passage and the second low, which has implications for
precipitation type and amounts. The system does look to sweep out by
the end of the week, with an upper trough to move in thereafter.

Overall, this means at least a chance for precipitation through just
about the entire period. After warmer temperatures Wednesday and
Thursday, we will once again drop to colder than normal for the end
of the week.

Aviation 02z Sunday through Thursday
Through 00z Monday... Ifr lifr conditions expected over the next
24 hours as winter storm affects area with widespread moderate
to locally heavy snow. Some intermittent MVFR possible at
times. Heaviest snow to affect terminals in the 08-16z time
frame in general. Some sleet possible at krut during this
period. Snow to lighten in intensity from 16-18z onward as storm
starts to pull away. Winds generally north northeasterly 6-12
kts overnight (easterly at krut), trending north northwesterly
10-18 kts after 12z Sunday and becoming gusty late in the
forecast period.

Outlook...

Sunday night: mainlyVFR, with areas MVFR possible. Chance shsn,
areas bs.

Martin luther king jr day: mainlyVFR, with local MVFR possible.

Chance shsn.

Monday night:VFR. No sig wx.

Tuesday:VFR. No sig wx.

Tuesday night:VFR. Chance shsn.

Wednesday: mainly MVFR and ifr, with areasVFR possible. Likely
shsn, likely shra.

Wednesday night: mainly MVFR, with local ifr possible. Chance
shsn.

Thursday: MVFR ifr conditions possible. Likely shsn.

Btv watches warnings advisories
Vt... Winter storm warning until 4 pm est Sunday for vtz001>012-
016>019.

Ny... Winter storm warning until 4 pm est Sunday for nyz026>031-034-
035-087.

Synopsis... Banacos
near term... Banacos clay
short term... Banacos
long term... Hastings
aviation... Jmg


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Burlington, Burlington International Airport, VT14 mi63 minN 72.00 miLight Snow-6°F-11°F75%1024.6 hPa
Plattsburgh International Airport , NY24 mi64 minN 75.00 miLight Snow-7°F-13°F75%1025.8 hPa

Wind History from BTV (wind in knots)
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Last 24hrN8N11N9N12
G22
N10N14N10
G18
N9N9N8N10N8N8NW11NW9NW10NW10NW9N8N9N7N6N5N7
1 day agoSE34S7S5S11S12S13
G20
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G19
S9S9S6W5NW7N10N12
2 days agoN11N6N7N7N6CalmNE7NE6NE5E5NE4CalmCalmCalm5SW3SW4CalmCalmCalmCalmE4E3SE3

Tide / Current Tables for
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Weather Map and Satellite Images
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GOES Local Image of Northeast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Burlington, VT (21,6,7,8)
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Ground Weather Radar Station Burlington, VT
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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.