Saturday, January23, 2021
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Marine Weather and Tides
Montpelier, VT

Version 3.4
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8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:17AMSunset 4:51PM Saturday January 23, 2021 2:16 AM EST (07:16 UTC) Moonrise 1:29PMMoonset 3:47AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 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 Montpelier, VT
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location: 44.27, -72.6     debug


Area Discussion for - Burlington, VT
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FXUS61 KBTV 230554 AFDBTV

Area Forecast Discussion National Weather Service Burlington VT 1254 AM EST Sat Jan 23 2021

SYNOPSIS. Scattered snow showers and flurries will persist tonight into Saturday as a modified arctic airmass settles across the region. Seasonably cold temperatures are expected through Monday before values moderate from mid-week onward. Outside a few light snow showers across the higher terrain, mainly uneventful weather is expected throughout the breadth of next week.

NEAR TERM /THROUGH SUNDAY/. As of 913 PM EST Friday . Main change made during this midnight update was to increase PoPs over the eastern Champlain Valley, where Froude numbers indicating blocked flow that will allow off and on snow showers to persist through the night. Not looking at much accumulation in lower elevations . just a few tenths of an inch Previous discussion follows.

Cyclonic west/northwest upslope flow continues along with moderately strong 925mb to 850mb caa. The combination of caa and upslope flow will help to squeeze remaining moisture out acrs the higher trrn with persistent on and off snow showers tonight into Saturday. Per web cam review looks like some mtn locations have received 1 to 3 inches this evening, with another couple inches possible overnight into Saturday. All this is covered very well in crnt fcst with likely/cat pops and snowfall accumulations of 2 to 4 inches acrs the highest peaks. Elsewhere, a dusting to an inch or so is possible. Temps have been slow to cool under this advection so far, which required some minor tweaks. Still anticipating lows in the single digits to lower teens overnight, while a cold and blustery day is anticipated on Saturday. Some breezy to localized gusty northwest downslope winds are possible on the east side of the Green Mountains on Saturday aftn/evening associated with good mixing below inversion and developing lvll jet.

Previous discussion below: A modified arctic frontal boundary continues to push across the southern half of the forecast area as of mid-afternoon, and will clear well south into the overnight hours. An additional surface trough passage is expected overnight, which will lead to a modest reblossoming of snow shower activity across the northern higher terrain into the morning hours on Saturday with minor additional accumulations expected. Lows tonight near seasonal late January norms in the single digits to around 10 above or so.

Coverage of mainly higher elevation snow showers then gradually wanes through Saturday afternoon as elongated surface ridge axis edges east from the Great Lakes. High temperatures to remain seasonably cold under modestly gusty northwest winds - mainly upper single digits into the teens. Then trending mainly dry by Sunday night as aforementioned ridge axis nears. With light northwesterly flow some tea kettling/steaming effects to the east of Lake Champlain will also be possible under the modified arctic airmass. Temperatures to bottom out mainly in the +/- single digits with some variability.

SHORT TERM /SUNDAY NIGHT/. As of 1205 AM EST Saturday . Sunday will be a chilly, breezy day under prolonged northwest flow. Winds will be strongest across eastern Vermont (sustained at 15-20 mph) where there will be a stronger pressure gradient. This is due to slow-to-depart low pressure located to the northeast while a narrow axis of high pressure approaches from the west. Winds will be gusty as well, especially across the high terrain and eastern Vermont, attributed to a northwesterly low-level jet of 45-55 knots positioned overhead. Drier air will move in aloft associated with the approaching high pressure, allowing skies to become mostly clear by Sunday evening. Still, model soundings indicated a very shallow layer of mid-level moisture trapped beneath a synoptic inversion mainly across eastern Vermont, thus indicating lingering cloud cover. In addition, there could be a few snowflakes, especially across the higher terrain of the Northeast Kingdom. However, relatively dry surface conditions may prevent them from reaching the ground, so no accumulation is expected. With mostly clear skies overnight Sunday into Monday and lingering arctic air, overnight lows are again expected near or below zero.

LONG TERM /MONDAY THROUGH FRIDAY/. As of 318 PM EST Friday . A relatively uneventful period of weather is in store next week. Temperatures will remain near seasonal in the absence of any strong advection patterns with highs in the 20s and overnight lows mainly in the single digits. Overall, dry weather is expected throughout the week. The one system to keep an eye on is a low pressure system that will track northeastward through the Ohio River Valley on Monday into Tuesday. However, this is expected to stay to the south of our forecast area thanks broad high pressure taking up residence to the north. Global model guidance is in pretty good agreement on this, and at this time, there's only a slight chance of snow across southern Rutland and Windsor counties on Tuesday. The dry pattern continues thereafter under upper-level ridging.

AVIATION /06Z SATURDAY THROUGH WEDNESDAY/. Through 06Z Sunday . Variable ceilings and visibilities across the forecast area as terrain-driven localized snow showers continue. These snow showers are forecast to impact KBTV through around 12Z with MVFR/IFR ceilings and visibilities before ending between 12Z and 15Z. Also being impacted by the snow showers is KSLK, although showers for KSLK are not forecast to be as persistent through the night and should come to an end around 10Z. Elsewhere, will see primarily MVFR/low VFR ceilings with occasional visibility reductions from passing snow showers, but persistent snow is not expected at KRUT, KMSS, KPBG, or KMPV.

Despite residual snow showers coming to an end later this morning, will see some MVFR ceilings develop/continue through the afternoon today as low-level moisture is trapped near the surface. A trend towards widespread VFR ceilings can be expected after 00Z.

Winds will be northwesterly/westerly at 4-7 knots, increasing to 7-12 knots with gusts 15 to 25 knots after 15Z.

Outlook .

Sunday: VFR. NO SIG WX. Sunday Night: VFR. NO SIG WX. Monday: VFR. NO SIG WX. Monday Night: VFR. NO SIG WX. Tuesday: VFR. NO SIG WX. Tuesday Night: VFR. NO SIG WX. Wednesday: Mainly VFR, with local MVFR possible. NO SIG WX.

BTV WATCHES/WARNINGS/ADVISORIES. VT . None. NY . None.

SYNOPSIS . JMG NEAR TERM . Duell/JMG SHORT TERM . Hammond LONG TERM . Hammond AVIATION . Duell


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Barre / Montpelier, Knapp State Airport, VT4 mi25 minN 310.00 miMostly Cloudy15°F12°F88%1011.9 hPa
Morrisville-Stowe State Airport, VT18 mi22 minNNW 75.00 miLight Snow17°F11°F77%1011.4 hPa

Link to 5 minute data for KMPV

Wind History from MPV (wind in knots)
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Last 24hrS4CalmS3CalmCalmCalmCalmCalmCalmCalm6NW8NW10NW7NW7NW6NW7NW5NW8NW6NW4NW9NW8N3
1 day agoW3CalmS3CalmCalmCalmE3CalmS7S6S6S5S7S5S6S5S9S6SE7SE5SE9SE9S7Calm
2 days agoSW6SW6W5NE4CalmCalmCalmCalmNE46NW10NW10NW6NW9NW9NW10
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Tide / Current Tables for
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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 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 numerous 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.