Monday, April19, 2021
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Marine Weather and Tides
Hermon, NY

Version 3.4
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1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:09AMSunset 7:54PM Monday April 19, 2021 5:30 PM EDT (21:30 UTC) Moonrise 9:58AMMoonset 1:18AM Illumination 54% Phase: First Quarter Moon; Moon at 8 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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SLZ024 Expires:202104192115;;800070 Fzus61 Kbuf 191622 Glfsl Forecast For The Saint Lawrence River Including The Thousand Islands Region National Weather Service Buffalo Ny 1222 Pm Edt Mon Apr 19 2021 Slz022-024-192115- Saint Lawrence River From Cape Vincent To Saint Regis 1222 Pm Edt Mon Apr 19 2021
This afternoon..Southwest winds 10 to 15 knots. Sunny.
Tonight..Southwest winds 5 to 10 knots. Showers likely after midnight.
Tuesday..Southwest winds 10 to 15 knots increasing to 15 to 20 knots. Showers likely in the morning.
Tuesday night..Southwest winds 10 to 15 knots becoming light and variable. A chance of rain showers in the evening, then snow showers likely with a chance of rain showers overnight.
Wednesday..North winds 5 to 10 knots becoming west. Snow and rain showers.
Thursday..West winds 10 to 15 knots. A chance of rain and snow showers during the day, then a chance of rain showers Thursday night.
Friday..West winds 10 to 15 knots becoming southwest. Partly cloudy.


7 Day Forecast for Marine Location Near Hermon, NY
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location: 44.45, -75.09     debug


Area Discussion for - Burlington, VT
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FXUS61 KBTV 192012 AFDBTV

Area Forecast Discussion National Weather Service Burlington VT 412 PM EDT Mon Apr 19 2021

SYNOPSIS. Scattered rain showers will come to an end this evening as daytime heating is lost. Additional chances for rain showers exist again on Tuesday as a cold front passes through, though without much impact. A stronger weather system will traverse the North Country Wednesday into Wednesday night, with more widespread precipitation expected. Temperatures trend below normal for Thursday onward with brisk northwest winds developing and higher elevation snow showers possible.

NEAR TERM /THROUGH TUESDAY NIGHT/. As of 405 PM EDT Monday . Scattered rain showers with an occasional rumble of thunder will continue this afternoon and evening across much of Vermont. As daytime heating is lost, showers will come to an end. A brief dry period is then expected late tonight as a narrow wedge of dry air and associated surface high pressure skirt across the region. Clouds and increasing chances for precipitation will quickly build back in from the west during the overnight hours as a cold front approaches. However, the front will pass during the day on Tuesday without much fanfare as the parent low lifts well to the north of the forecast area. The best chances for rain will be during the early morning hours on Tuesday across northern New York. As the front progresses eastward during the day, forcing is lost and rain showers will become limited to the higher terrain of northeast Vermont. Overall, less than one tenth of an inch of rain is expected on Tuesday. The greater impact of the frontal passage will be the sharp temperature gradient that will exist across the area with highs only in the 40s across northern New York and reaching mid to upper 50s across southeastern Vermont. Tuesday will also be breezy during the day with sustained winds out of the WSW at 10 to 20 mph and gusts up to 20 to 30 mph. Temperatures will drop throughout the day as low level flow becomes northerly with overnight lows dropping into the upper 20s to low 30s.

SHORT TERM /WEDNESDAY THROUGH THURSDAY/. As of 405 PM EDT Monday . Another widespread rain/snow event will affect the North Country, with the higher elevations again possibly seeing several inches of accumulation. The model guidance continues to show a trend toward a colder solution, with surface low pressure to move from western PA early Wednesday to southern VT/NH by Wednesday evening and then into eastern ME by Thursday morning. Model consensus is also trending colder aloft, as we look to have a 700 mb low move nearly overhead Wednesday night, rather than an open wave as was indicated previously. Hence, current expectations are that precipitation will overspread the region Wednesday morning and continue through the day into the evening before transitioning to more upslope showers overnight Wednesday night into Thursday. Areas from the Adirondacks westward would start out primarily as snow or a rain/snow mix and quickly turn over to all snow by Wednesday afternoon as the low deepens and moves eastward, pulling colder air in its wake. Locations east of the Adirondacks, especially below 1500 ft. However, these areas too will transition to snow by Wednesday evening. Strong frontogenetical forcing will exist along the leading edge of the colder air, so briefly heavy precipitation will be possible during the afternoon hours. Note that some model solutions, particularly the NAM, are indicating a period of wintry mix of sleet and freezing rain along the rain/snow transition line. The NAM's an outlier with bringing the warm air aloft in this far north though, and given the overall trend toward a colder solution, have kept with just a mention of rain and/or snow. Highs will be variable across the region on Wednesday, ranging from the mid 30s in the northern Adirondacks to the mid 50s in the lower Connecticut River Valley. Wednesday night, the low moves east and get into northwest flow and upslope wrap-around showers. Although focused in the mountains, any precipitation will change over to snow as lows dip into the 20s to around 30 areawide. Overall, expect snow accumulations of 1 to 3 inches in the higher terrain, with locally higher amounts of 3-5 inches along the northwestern slopes of the Adirondacks and on the highest summits.

For Thursday . the upslope snow showers will continue through the day, with the wider valleys seeing a change over to rain. Highs will be in the mid 30s in the mountains and in the lower 40s at lower elevations, but brisk west to northwest winds will make it feel colder still.

LONG TERM /THURSDAY NIGHT THROUGH MONDAY/. As of 405 PM EDT Monday . Wrap around rain/snow showers continue Thursday night into early Friday as the upper low spins into the Canadian Maritimes. Friday will be brisk with gusty west/southwest winds. Highs will only be in the 40s east of the Greens, while 50s are expected elsewhere. The first half of the weekend will be pleasant as we'll see brief ridging and temperatures warming back up into the upper 50s to mid 60s. However, another low pressure system will bring widespread precipitation to the region Sunday and Sunday night. This looks to be mainly be a rainfall event, with some wet snow mixing in at the highest elevations. Highs for early next week will be in the upper 40s to upper 50s, with lows in the 30s.

AVIATION /20Z MONDAY THROUGH SATURDAY/. Through 18Z Tuesday . Generally VFR conditions are expected through the period. BKN-OVC low/mid clouds will continue today with scattered showers developing from the Champlain Valley eastward this afternoon. Could see MVFR vsby in any heavier showers but not explicitly forecast at this time. Brief clearing occurs for a few hours this evening after sunset, before a front approaches from the west with MVFR ceilings moving into northern New York towards dawn. With skies remaining clear across eastern Vermont during this time, a brief period of morning fog is possible at KMPV between 08z and 12z resulting in IFR to LIFR conditions. A return to VFR is expected thereafter. Winds will be out of the south/southwest of 5 to 10 knots through 00z, becoming light and variable overnight. After 12z Tuesday, winds will become westerly and increase up to 15 knots with gusts up to 25 knots.

Outlook .

Tuesday Night: VFR. Chance SHRA, Chance SHSN. Wednesday: Mainly MVFR, with local VFR possible. Likely SHRA. Wednesday Night: Mainly MVFR, with areas VFR possible. Likely SHRA, Chance SHSN. Thursday: VFR. Chance SHRA, Chance SHSN. Thursday Night: Mainly VFR, with local MVFR possible. Slight chance SHRA, Slight chance SHSN. Friday: Mainly VFR, with local MVFR possible. NO SIG WX. Friday Night: VFR. NO SIG WX. Saturday: VFR. Slight chance SHRA.

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

SYNOPSIS . Hammond/Lahiff NEAR TERM . Hammond SHORT TERM . Hastings LONG TERM . Hastings AVIATION . Hammond/Lahiff


Weather Reporting Stations
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On 03/09/2021 the NDBC primary processing servers were shut off due to a facilities issue. Station pages on the NDBC website are not updating and there is no ETR at this time. We will update this banner as we learn more.
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OBGN6 - 8311030 - Ogdensburg, NY 28 mi42 min 59°F 1006.8 hPa
ALXN6 - 8311062 - Alexandria Bay, NY 45 mi42 min 43°F1007.5 hPa

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Massena, Massena International-Richards Field, NY36 mi37 minWSW 1010.00 miFair62°F28°F28%1006.9 hPa

Link to 5 minute data for KMSS

Wind History from MSS (wind in knots)
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Last 24hrSW7SW5SW5SW4CalmCalmCalmSW4CalmCalmCalmSW4CalmCalmS6SW12S12SW10SW9SW10SW13
G19
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1 day agoN4E4E4E3CalmNE3CalmS3S4S4CalmCalmCalmCalmSW3S3SW6CalmCalmE5NE45N6SW10
2 days agoNE11E10NE16
G21
NE11NE11NE10NE10NE6N6CalmCalmW3NW3N3NE9NE7N6E4E4NE8NE4CalmNE3W5

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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