Thursday, April26, 2018

Marine Weather and Tides
South Burlington, VT

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 5:47AMSunset 7:53PM Thursday April 26, 2018 2:01 AM EDT (06:01 UTC) Moonrise 4:12PMMoonset 4:31AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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 South Burlington, VT
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location: 44.43, -73.25     debug

Area Discussion for - Burlington, VT
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Fxus61 kbtv 260544
area forecast discussion
national weather service burlington vt
144 am edt Thu apr 26 2018

Areas of low pressure will affect the area through the upcoming
weekend with near seasonable temperatures and a periodic threat
of showers. Fair and much warmer weather returns to the region
by the early to middle portions of next week as strong high
pressure builds across the eastern half of the nation.

Near term through tonight
As of 1249 am edt Thursday... Area of showers across vermont
early this morning is lifting northeast and should exit the area
in a couple hours. Meanwhile some showers to our south may move
back in but it will take the upper circulation near the western
portions of lake ontario to move east and increase dynamic
support for a redevelopment of precipitation across northern new
york toward sunrise. Have tweaked precipitation chances to fit
this scenario... Otherwise rest of forecast in good shape with
plenty of cloud cover and temperatures falling little from
current readings.

Previous discussion below:
the forecast remain on track as we head into the evening hours.

Our first wave of light rain is now lifting into northern
counties while a distinct dry slot surges northward in advance
of a slowly approaching upper shortwave trough across the
eastern great lakes. Our area will largely lie within the dry
slot regime this evening into the first half of tonight, and as
such precipitation will trend more scattered and showery in
nature with areal pops lowering into the chance category -
especially for the eastern half of the forecast area. By later
tonight the aforementioned upper trough pivots into the area
with a general redevelopment of activity later tonight. Low
temperatures a blend of available guidance - mainly 40s.

The upper trough then swings through the area during the morning
hours on Thursday as bands of showers pivot east to west across the
area - especially north. The central core of this feature is fairly
compact with rather cool thermal profiles in the 700-500 mb level.

This, along with good PVA and moisture convergence on the front nose
of this feature warrants higher pops in the 60-80 percent range
through the morning hours, again most concentrated across northern
counties. By afternoon the main upper feature begins to exit east so
pops gradually wane toward evening. Highs to run quite similar to
today as winds trend light westerly over time - mainly 50s with a
few upper 40s across the adirondacks.

A brief window of drier weather then arrives for Thursday night as
weak shortwave ridging evolves between the departing trough and
additional energy taking shape across the southeast. Given broad
consistency in this idea among this morning's models a mainly rain-
free night is expected as skies trend partly cloudy over time. Low
temperatures a tad cooler in the upper 30s to lower 40s in

Short term Friday through Saturday
As of 348 pm edt Wednesday... Friday morning will start off dry
as shortwave ridging builds in, however some showery
precipitation will spread northward throughout the afternoon as
a surface low lifts out of the southeastern united states.

Models continue to struggle to come to a consensus on the track
of this low, with the GFS remaining steadfast in the furthest
west track, while the previous outlier ECMWF has come into
better line with the NAM gem track that takes the low up the
coast. By Friday afternoon however, models are coming to better
agreement that the aforementioned low will become absorbed into
the broader longwave trough, phasing to some extent with
northern stream energy rounding the trough from central canada.

As multiple shortwaves gyrate within the base of the broader
longwave trough over the northeastern us, the north country will
see an extended period of showery weather through Saturday. It
looks like the entire Friday through Saturday time period
certainly won't be one big washout, but rather on and off
showery precipitation closely tied to individual shortwaves.

These features are notoriously difficult to time this far out,
so have stuck with chance pops for this time period, but expect
to have a better handle of timing location of individual waves
within the next few forecast packages.

Long term Saturday night through Wednesday
As of 348 pm edt Wednesday... The generally unsettled weather will
continue Saturday night through Sunday night as the dynamic
upper-level trough remains over the northeast. The trough will
also bring a shot of cooler air that will limit temperatures
Sunday from climbing above the upper 40s low 50s. The cold air
advection will also support a well mixed boundary layer during
the day time hours, so Sunday afternoon will feel a little

The pattern shifts Monday morning however as the trough pushes
east and expansive ridging pushes in from the west.

Southwesterly return flow around a building surface high to our
south will support a warming trend for the first half of the
work week. Everything is still on track for us to see temps in
the upper 50s low 60s Monday, then into the low to mid 70s for
Tuesday and Wednesday.

Aviation 06z Thursday through Monday
Through 06z Friday... Precipitation has lifted northeast of the
area early this morning... But deep moisture remains over the
area. This is resulting in a wide variety of conditions with
general MVFR ceilings and visibilities expected through about
14z... But there will be frequent periods before 14z where ifr
and lifr conditions are expected. Eventually after 14z an upper
level low pressure system will move in from the west and mixing
will take place as southwest winds develop at speeds around 10
knots. This will help lift ceilings and visibilities into the
vfr and MVFR categories. At the same time showers will be
numerous across the area through about 00z before the upper
level low pressure system moves east and precipitation comes to
an end withVFR visibilities for the remainder of the period.

Ceilings after 00z should also be in theVFR category.


Friday:VFR. Chance shra.

Friday night: MVFR ifr conditions possible. Chance shra.

Saturday: mainlyVFR, with local MVFR possible. Chance shra.

Saturday night: mainlyVFR, with local ifr possible. Chance shra,
chance shsn.

Sunday: mainly MVFR, with areasVFR possible. Chance shra.

Sunday night: mainly MVFR, with local ifr possible. Slight chance
shra, slight chance shsn.

Monday: mainly MVFR, with areasVFR possible. No sig wx.

Btv watches warnings advisories
Vt... None.

Ny... None.

Synopsis... Jmg
near term... Evenson jmg
short term... Rsd
long term... Rsd
aviation... Evenson

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Burlington, Burlington International Airport, VT6 mi67 minWSW 42.50 miFog/Mist53°F51°F93%1003.1 hPa
Plattsburgh International Airport , NY19 mi68 minN 01.25 miFog/Mist51°F50°F96%1002.8 hPa

Wind History from BTV (wind in knots)
Last 24hrS11
1 day agoS12S12S12
2 days agoCalmCalmCalmCalmCalmCalmCalmSE4S6W4S7W7W845S9S5S8S5S6S4S5S7S9

Tide / Current Tables for
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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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Burlington, VT (2,6,7,8)
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Ground Weather Radar Station Burlington, VT
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