Monday, August21, 2017

Marine Weather and Tides
Marshfield, VT

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:02AMSunset 7:48PM Monday August 21, 2017 1:57 PM EDT (17:57 UTC) Moonrise 5:40AMMoonset 7:49PM Illumination 0% Phase: New Moon; Moon at 29 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 Marshfield, VT
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location: 44.36, -72.29     debug

Area Discussion for - Burlington, VT
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Fxus61 kbtv 211516
area forecast discussion
national weather service burlington vt
1116 am edt Mon aug 21 2017

Another quiet weather day for Monday with partly cloudy skies
and seasonable temperatures. An approaching low pressure system
will increases chances for showers and thunderstorms Tuesday,
with showers lingering into Wednesday. The remainder of the week
is shaping up to be mainly dry, with plentiful sunshine and
below normal temperatures.

Near term until 6 pm this evening
As of 1115 am edt Monday... Forecast is on target this morning.

Water vapor imagery shows a weak upper level short wave with
some high clouds is moving through the region but should be
pretty much gone this afternoon. Also low-level moisture with td
in the 60s will lead to some cumulus clouds especially over the
mountains. CAPE of 500-1000 j kg forecast on rap but should be
just capped enough to prevent any convection. Morning observed
and forecast soundings confirm we should make it into the 80s
(around 87 kbtv) this afternoon with 850 temps 14-16c. The
partial eclipse may hold temps a couple degrees down during mid

Very nice day in store for this Monday to start the work week.

Surface high pressure ridge still reaching the area, centered
over the mid atlantic region will be shifting eastward today.

Light winds will become southerly today. Warm air advection
ahead of next approaching low pressure system, therefore max
temps will edge into the upper 80s. Should be a good day to view
the partial solar eclipse with proper safety precautions, 240
pm will be peak viewing time and skies should mainly be clear at
that time.

Short term 6 pm this evening through Wednesday
As of 500 am edt Monday... More active weather is expected
beginning Tuesday afternoon. Strong southwesterly flow will
continue tonight. Low pressure system takes shape tonight over
the great lakes region as a deepening 500 mb trough moves into
the western great lakes. Pwats will increase during this time
period with low level moisture advecting into the area on the
strong southwesterly flow, nearing 2" by Tuesday morning.

Increasing shear profile expected with 500 mb jet nearing 50
kts. Surface low will pass north of our forecast area on Tuesday
along with trailing cold front which will be reaching our
northern new york zones around 18z. Front moves east across our
forecast area and will be east of vermont by 12z Wednesday
morning. Showers and thunderstorms will develop out ahead of the
frontal boundary, starting in the saint lawrence valley and then
spreading eastward. Models are indicating CAPE in the 1-2k
range, so will have some decent low level instability as well.

Storms will be strongest in northern new york due to placement
of jet lining up with saint lawrence valley, good low level
0-6 km shear. Temperatures will warm to almost 90 across the
area. Heavy rainfall and strong gusty winds are possible with
these storms, but storm motions should be fast enough to avoid
flash flooding. Hi res models depict a line of storms forming
and moving across our area between 20z and 04z. Storms should be
ending by about midnight. Upper level trough will pass north of
the region on Wednesday bringing some shortwave energy across
our area and will have to mention chance for some more showers
with this feature, though mainly confined to the higher
elevations. Cooler air will begin to move into the area later
Wednesday as well behind departing cold front, highs will be
closer to seasonal normals wed.

Long term Wednesday night through Sunday
As of 415 am edt Monday... The north country will remain under
the influence of mid-level cyclonic flow throughout the period,
while high pressure will build at the surface. The period will
start with a surface front that will move across the region with
a chance for showers on Thursday. Behind this front, northwest
to northerly flow will settle in with the main 500mb trough
lagging behind on Friday and result in slight chance of showers.

On Saturday, surface high pressure will build in with drier air
as pwats fall to 0.5-0.7 inches. Outside of a slight chance for
orographic shower or two on Saturday, expect dry conditions
through the end of the period with strong surface ridge
continuing to affect the region into Monday. Temperatures will
be slightly lower than late august normals throughout the

Aviation 15z Monday through Friday
Through 12z Tuesday... Residual fog at kslk will erode this
morning, leavingVFR conditions at all terminals throughout the
day into this evening. S-sw winds will increase to 5-10kts, with
gusts around 20kts developing at kmss and kslk. Winds will
subside this evening, decreasing to around 5 kts or less. Expect
some fog development at kmpv and kslk after 06z Tuesday. Low
level jet will be weaker over these terminals, but still around
20kts. This could lead to another night of intermittent MVFR ifr


Tuesday:VFR. Likely shra... Slight chance tsra.

Tuesday night:VFR. Likely shra... Occasional tsra.

Wednesday:VFR. Slight chance shra.

Wednesday night:VFR. Slight chance shra.

Thursday:VFR. Slight chance shra.

Thursday night:VFR. No sig wx.

Friday:VFR. No sig wx.

Btv watches warnings advisories
Vt... None.

Ny... None.

Synopsis... Neiles
near term... Neiles sisson
short term... Neiles
long term... Kgm
aviation... Kgm

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St. Johnsbury - Fairbanks, VT15 mi64 minno data mi78°F64°F64%1017.8 hPa
Barre / Montpelier, Knapp State Airport, VT18 mi67 minW 810.00 miFair80°F57°F47%1020.7 hPa
Caledonia County Airport, VT20 mi83 minSE 310.00 miPartly Cloudy75°F63°F67%1020.7 hPa
Morrisville-Stowe State Airport, VT21 mi64 minVar 510.00 miFair79°F57°F49%1019.4 hPa

Wind History from 1V4 (wind in knots)
Last 24hr------------------------------------------------
1 day ago------------------------------------------------
2 days ago------------------------------------------------

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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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Northeast    EDIT

Wind Forecast for Burlington, VT (13,3,4,5)
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Ground Weather Radar Station Burlington, VT
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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 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 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.