Wednesday, January27, 2021
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Marine Weather and Tides
Seabrook Beach, NH

Version 3.4
NOTICE
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 7:00AMSunset 4:51PM Wednesday January 27, 2021 9:43 PM EST (02:43 UTC) Moonrise 4:33PMMoonset 7:29AM Illumination 100% Phase: Full Moon; Moon at 15 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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ANZ251 Massachusetts Bay And Ipswich Bay- 716 Pm Est Wed Jan 27 2021
.freezing spray advisory in effect from late Thursday night through Friday afternoon...
.gale watch in effect from late Thursday night through Friday evening...
Tonight..N winds 10 to 15 kt. Seas 2 to 3 ft. A chance of snow showers. A chance of showers this evening.
Thu..NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of snow showers. Vsby 1 to 3 nm.
Thu night..NW winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to 6 ft. Light freezing spray.
Fri..NW winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to 7 ft. Freezing spray. A chance of snow showers. Vsby 1 to 3 nm.
Fri night..NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 5 to 8 ft. Light freezing spray.
Sat and Sat night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft.
Sun..N winds 5 to 10 kt. Seas 3 to 5 ft.
Sun night..NE winds 10 to 15 kt. Seas 2 to 4 ft.
Mon..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 8 ft. A chance of rain and snow. Vsby 1 to 3 nm.
Mon night..NE winds 20 to 25 kt with gusts up to 30 kt. Seas 9 to 12 ft. Rain likely. Vsby 1 to 3 nm. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
ANZ200 716 Pm Est Wed Jan 27 2021
Synopsis for massachusetts and rhode island coastal waters.. Low pressure develops along the carolina coast tonight and moves out to sea well south of new england Thursday. This will draw northwest gales across the waters Thursday night and Friday, as well as scattered snow showers and areas of freezing spray. High pressure builds over the waters with dry weather and diminishing wind for Saturday night and Sunday. For additional information on possible hazardous weather for the week ahead, please visit www.weather.gov/boston/ehwo.


7 Day Forecast for Marine Location Near Seabrook Beach, NH
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location: 42.83, -70.61     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 280108 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 808 PM EST Wed Jan 27 2021

SYNOPSIS. Tomorrow, a trough will move through eastern Maine bringing light snow to the coast. A strong upper level low will move southeastward into New England early Friday morning, bringing down the coldest air so far this season. Scattered snow showers and potentially a heavier snow squall will be possible on Friday and early Friday evening. High pressure will build to our northwest this weekend with mostly tranquil weather and gradually moderating temperatures expected. A potential storm may bring snow and wind to the area early next week but there remains some uncertainty in the details.

NEAR TERM /UNTIL 6 AM THURSDAY MORNING/. 8:00 PM UPDATE . Snow continues to fall as it has been for about 24 hours straight now here at our office in Gray and therefore went ahead and increased PoPs to categorical for some locations in southwestern ME for the next couple of hours. High resolution model guidance has not been handling this persistent light snow well and therefore manual editing was heavily used in order to better represent where the snow is occuring. Generally expecting up to an additional half to three quarters of an inch of snow through the remainder of the evening and early overnight hours before snow should finally become more scattered in nature late tonight. Temperatures have been nearly steady for the last couple of hours and given the amount of cloud cover and moisture present, this trend will likely continue. As a result, some adjustments were made to temperature and dew point grids. The rest of the forecast remains largely on track.

Impacts: Light snow and snow showers will continue over portions of western ME and northern NH tonight. Only light accumulations, if any, are expected, but could see brief reductions in visibility and slick roads for those areas. Could also see some refreezing of roads in southern areas overnight.

Clouds have persisted through the day, along with an area of light snow and snow showers over portions of western ME as a weak mid-upper trough remains over the Gulf of Maine. High-res guidance remains somewhat mixed on how long this activity will last, but regardless, have some likely to chance PoPs over much of western ME through tonight. Not expecting much in the way of accumulation, but a coating to a few tenths are possible. Will also see snow showers continue on northern NH where very light accumulations are possible. This activity should be rather low impact, but brief reductions in visibility and slick roads will be possible at times in those areas tonight and early tomorrow morning. With low temperatures dropping into the teens and 20s, will also note the potential for refreezing on any untreated roads, particularly in southern zones where temperatures rose above freezing this afternoon.

SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/. Impacts: Light snow and snow showers possible over portions of western ME and northern NH. Only light accumulations, if any, are expected, but could see brief reductions in visibility and slick roads for those areas.

General troughiness remains over New England in the short term, but flow is expected to become more northwesterly as we progress through the day Thursday. Light snow showers will be possible along the international border in the typically favored upslope areas. The other place to watch will be the ME coast as the same mid-upper level trough may allow some light snow to develop right along the coast. In all cases, any accumulations will be light and impacts will be similar to today.

Much colder air will begin to filter into the region Thursday night on increasing northwesterly winds. Lows will range from near zero for northern and western zones and in the positive single digits elsewhere . likely the coldest air mass we have seen this season. Wind chills will likely drop down into the 10 to 20 below range for northern zones and in the 0 to 10 below ranges for southern zones by Friday morning.

LONG TERM /FRIDAY THROUGH WEDNESDAY/. The overall pattern through late next week looks to continue to be dominated by a blocking ridge of high pressure across Northeastern Canada.

The coldest airmass of the season will continue to work its way into the area for the end of the week and early this weekend. Highs will largely remain in the teens on Friday as gusty northwesterly winds continue to advect in the colder airmass. The gusty winds will be enhanced by a developing area of low pressure that will deepen as it departs the Gulf of Maine and heads south of Nova Scotia. A few snow showers are possible on Friday as the trough that will aide in the development of the system passes across New England, especially closer to the coast.

The combination of gusty winds and cold temperatures will send wind chill readings below zero across the entire CWA Friday night and Saturday morning. The winds will become less of a factor on Saturday, but it won't be until later Saturday night and Sunday as the ridge axis moves overhead that the winds will become fairly light.

On Saturday, a storm system will emerge out of the Rocky Mountains and deepen across the Southern Plains of the US. This storm will weaken across the Ohio River Sunday and Sunday night, and a new low will develop near the Outer Banks by Monday.

Under the influence of the blocking ridge across northeastern Canada, the low pressure will be slow to make it's way up the coastline, likely not moving out to sea south of Nova Scotia until late Wednesday or Thursday. So the major question for early and midweek next week is just how close this storm system will track to our area.

The models overall are in fairly good agreement that the low pressure center will track well to our south, and that it's more a question of how much moisture can push northward into Northern New England.

The GFS, GEFS, Canadian, and Canadian ensembles have been in fairly good agreement that some precipitation would make it's way into our CWA, mainly along the coastal plain, with the Canadian and it's ensembles generally bringing more moisture farther north than the GFS and GEFS. The Euro has been little more back and forth on how much moisture makes its way into our area, while the Euro ensemble members have been trending toward a more significant snowfall for most of the area. There is good agreement among the models that Tuesday and Tuesday night would be the best chance of seeing accumulating snowfall.

With there still being notable differences in the models, the generally weak steering patterns affecting the storm, and the best chance of impacts from the system still being at least five days away, I trended to bring POPs up for Tuesday and Tuesday night, but held off on going too strong one way or the other.

Once the system departs later next week, high pressure will build across New England for the end of the week.

AVIATION /01Z THURSDAY THROUGH MONDAY/. Short Term . VFR to MVFR conditions expected through the short term. Light snow showers expected through this evening at AUG/PWM/PSM through this evening. Light snow showers possible at HIE through the entire short term. Winds become northwesterly on Thursday, increasing throughout the day and into Thursday night.

Long Term . Scattered snow showers on Friday will reduce visibilities at times. Gusty North-Northwesterly winds are also likely Friday and Friday night. VFR conditions are then expected Saturday through Monday.

MARINE. Short Term . No concerns through tonight, other than some light snow/rain showers over the waters. Northwesterly winds increase over the waters through Thursday and into Thursday night. Have issued a gale watch beginning early Friday morning for the outer waters as gusts to 35 kt are expected before daybreak Friday morning. Seas will also build to 4-5 ft over the outer waters by 12Z Friday.

Long Term . Gale force winds are likely across the waters late Thursday night through Friday night as a low pressure center deepens south of Nova Scotia. SCA conditions would then be expected Saturday. Freezing spray is also expected during this time period. High pressure will build across the waters late Saturday through early Monday. Another storm system is then likely early to midweek next week.

GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . None. MARINE . Gale Watch from late Thursday night through late Friday night for ANZ150-152-154.

NEAR TERM . Tubbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
IOSN3 - Isle of Shoals, NH 9 mi44 min N 16 G 18 34°F 1016.6 hPa (+0.0)34°F
44073 14 mi160 min N 16 G 19 37°F 42°F
CMLN3 17 mi160 min NW 12 31°F 39°F
BGXN3 - Great Bay Reserve, NH 20 mi59 min NNW 1 33°F 1018 hPa33°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 21 mi100 min NNW 16 G 18 36°F 3 ft1015.8 hPa
44098 - Jeffrey's Ledge, NH (160) 23 mi48 min 41°F4 ft
44030 - Buoy B0102 - Western Maine Shelf 26 mi100 min N 16 G 18 34°F 3 ft1016.2 hPa
44013 - BOSTON 16 NM East of Boston, MA 34 mi34 min NNW 14 G 18 36°F 42°F1017.2 hPa33°F
WEXM1 - Wells Reserve, ME 35 mi44 min NNW 5.1 32°F 31°F

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH21 mi3.8 hrsN 57.00 miLight Snow34°F29°F81%1016.9 hPa
Beverly, Beverly Municipal Airport, MA24 mi51 minN 65.00 miFog/Mist33°F31°F92%1016.5 hPa

Link to 5 minute data for KPSM

Wind History from PSM (wind in knots)
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Last 24hrW3NW4N4N5N6--N7----N8N8----N7N5--N6--NW7N8NW7N7N6N5
1 day agoW4W7W6--W4--W4NW3----W5CalmCalmCalm--NE5CalmCalmE5E5SE3------
2 days ago------W13--W13
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Tide / Current Tables for Gosport Harbor, Isles of Shoals, New Hampshire
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Gosport Harbor
Click for Map
Wed -- 03:35 AM EST     1.03 feet Low Tide
Wed -- 06:29 AM EST     Moonset
Wed -- 07:02 AM EST     Sunrise
Wed -- 09:55 AM EST     8.99 feet High Tide
Wed -- 03:32 PM EST     Moonrise
Wed -- 04:17 PM EST     -0.05 feet Low Tide
Wed -- 04:48 PM EST     Sunset
Wed -- 10:33 PM EST     7.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.73.82.21.21.11.93.55.57.48.698.46.94.72.50.8-00.21.33.15.26.87.77.8

Tide / Current Tables for Newburyport (Merrimack River), Massachusetts Current
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Newburyport (Merrimack River)
Click for Map
Wed -- 01:23 AM EST     -1.05 knots Max Ebb
Wed -- 05:02 AM EST     0.00 knots Slack
Wed -- 06:29 AM EST     Moonset
Wed -- 07:02 AM EST     Sunrise
Wed -- 08:49 AM EST     1.56 knots Max Flood
Wed -- 11:05 AM EST     -0.00 knots Slack
Wed -- 01:45 PM EST     -1.35 knots Max Ebb
Wed -- 03:34 PM EST     Moonrise
Wed -- 04:50 PM EST     Sunset
Wed -- 05:33 PM EST     0.00 knots Slack
Wed -- 09:15 PM EST     1.62 knots Max Flood
Wed -- 11:36 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-1-1-0.9-0.7-00.71.11.41.510.1-0.8-1.2-1.3-1.2-1.1-0.50.411.31.61.40.6

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