Thursday, April2, 2020
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Marine Weather and Tides
Lynn, MA

Version 3.4
NOTICE
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 6:21AMSunset 7:12PM Thursday April 2, 2020 2:49 AM EDT (06:49 UTC) Moonrise 12:35PMMoonset 3:14AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 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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ANZ230 Boston Harbor- 116 Am Edt Thu Apr 2 2020
.gale watch in effect from Friday morning through late Friday night...
Rest of tonight..N winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft, except 3 to 5 ft at the outer harbor entrance. Rain likely.
Thu..NW winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft, except 4 to 6 ft at the outer harbor entrance. Rain. Vsby 1 to 3 nm.
Thu night..N winds 20 to 25 kt with gusts up to 30 kt. Waves around 2 ft, except 6 to 9 ft at the outer harbor entrance. Rain. Vsby 1 to 3 nm.
Fri..N winds 20 to 25 kt with gusts up to 40 kt. Waves around 2 ft, except 7 to 10 ft at the outer harbor entrance. Rain. Vsby 1 to 3 nm.
Fri night..N winds 20 to 25 kt, becoming ne 15 to 20 kt after midnight. Gusts up to 35 kt. Waves around 2 ft, except 7 to 10 ft at the outer harbor entrance. A chance of rain.
Sat and Sat night..SW winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft, except 5 to 8 ft at the outer harbor entrance.
Sun through Mon night..NW winds 5 to 10 kt. Waves 1 foot or less, except 3 to 5 ft at the outer harbor entrance. 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 116 Am Edt Thu Apr 2 2020
Synopsis for massachusetts and rhode island coastal waters.. A gale center will track well east of the waters overnight then become nearly stationary into Fri. The storm will bring gale force winds tonight into Fri. High pres will build over the waters during the weekend. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the current hazards link above the map on the left.


7 Day Forecast for Marine Location Near Lynn, MA
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location: 42.45, -70.95     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 020600 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 200 AM EDT Thu Apr 2 2020

SYNOPSIS. A large and intense ocean storm well southeast of New England this evening will pinwheel back toward the coastline Thu and Fri. This storm will bringing strong to possibly damaging winds and coastal flooding to coastal eastern MA especially Cape Cod and the Islands. In addition periods of rain, heavy at times will overspread the area Thu and Fri. Mainly dry weather returns for the weekend along with temperatures not as cool.

NEAR TERM /UNTIL 6 AM THIS MORNING/. 2 AM update .

Bands of rain continue to back in across Cape/Islands and into east coastal MA. Rain will continue to be focused along the coast through daybreak with some west progression across rest of eastern MA.

Previous discussion .

Bands of light rain rotating west across the Cape/Islands this evening. Light rain assocd with area of low level warm advection and isentropic lift wrapping around large ocean storm well SE of the region. Expect spotty light rain to eventually back in across eastern MA overnight, especially near the coast where modest forcing is focused through 12z.

SHORT TERM /6 AM THIS MORNING THROUGH 6 PM FRIDAY/. 430 PM update .

Thursday .

Vertically stacked 980ish mb low well east of Nantucket around 40N/60W 12z Thu, begins to retrograde westward courtesy of -NAO blocking pattern downstream. This results in this large and deep circulation tracking westward toward the Gulf Maine and its associated TROWAL precip backing into MA/RI/CT as the day progresses with rain fairly widespread by late in the day.

Ptype mainly rain but marginal temps aloft may support some wet snow mixing in at times if precip intensity allows wet bulb temps to be realized. Again, mainly a rain event here. Another cool day with highs only in the 40s but low 50s possible across CT given rain delayed there until late in the day. Chilly north winds with gusts up to 30 mph except up to 45 mph over Cape Cod and the Islands.

Thursday night .

Model guidance has trended farther west with ocean low and now expected to make its closest approach toward 12z Fri, near the 40N/70W benchmark. Model soundings and wind fields suggest 55-60 kt low level NE jet moving across Cape Cod and Islands toward 12z Fri. Thus have hoisted a High Wind Watch for this area given the potential for wind gusts near 60 mph. Periods of rain, heavy at times continue especially across eastern MA and RI. Lows mainly 35- 40, low 40s Cape Cod and Islands.

Coastal flooding .

Had a one foot observed storm surge this morning at Nantucket. ETSS and ESTOFS only offering a 1 foot surge Thu morning despite increasing onshore winds tonight. Stevens Institute surge ensembles suggest closer to a 2 ft surge possible. This would bring storm tide close to flood stage. This combined with 4-6 ft wave action ontop of the surge suggest minor coastal flooding likely. Thus have issued a Coastal Flood Advisory for Nantucket Thu morning high tide. Little if any flooding expected elsewhere.

For Fri, astro high tide slightly higher but given core of strong winds will occur around 12z expecting NNE winds gusting up to 60 mph to generate a 2-3 ft surge. This places most of the eastern MA coastline in a moderate flood category with greatest risk Cape Cod communities to Nantucket. In addition greater wave action expected as well with 15-20 ft seas ocean waters east of Nantucket and Cape Cod. Low risk for seas up to 25 ft seas Fri morning. These dangerous seas will be long period/high energy waves. Thus to highlight this threat of moderate coastal flooding have issued a coastal flood watch for Fri morning high tide for the entire coastline. Again greatest risk across Cape Cod and Nantucket. Keep in mind highest astro tides are in the morning vs evening tide cycle.

LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/. Highlights .

*Powerful offshore storm will bring periods of rain and high winds to much of the area Thursday and Friday.

*Lingering showers on Saturday before drying out by Saturday afternoon. Sunday looks to feature mostly dry conditions with moderating temperatures.

*Seasonable conditions for first part of the work week with occasional chances for showers.

Details .

Friday .

The huge ocean storm will continue to retrograde on Friday, bringing periods of rain and high winds to much of Southern New England. This is in response to a highly amplified and blocky synoptic pattern over the higher latitudes, resulting in a deep and slow-moving 500mb trough over the Atlantic Ocean. By Friday morning, as the warm front wraps around the retrograding surface low, a northeasterly low level jet will develop and intensify to 60-65 kts at 925mb over Eastern MA. Given that Bufkit soundings show mixing up to around 900mb and momentum transfer of up to 55 kts, have gone ahead and issued High Wind Watches over the Cape and Islands. By Friday afternoon, conditions are forecast to improve slowly from west to east. There may even be enough breaks in the clouds to support temperatures in the upper 40s and lower 50s in Western MA and CT while rainy and raw conditions continue in Eastern MA and RI.

Saturday into Sunday .

A warming trend begins early Saturday as a broad 500mb ridge slowly builds in from the west. There remains questions on how quickly the aforementioned trough will be able to move out of the way. Moreover, remnant pieces of shortwave energy from the exiting trough look to linger for occasional showers and plenty of clouds.

Sunday looks to be the nicer day of the weekend as a broad surface high pressure builds in from the mid-Atlantic states, Temperatures could overperform especially near and along the CT River valley on Sunday, which looks most likely to be in the warm sector out ahead of a cold front. The ECMWF has 925mb temperatures of around +7 to +9C in Western MA and CT. Using pattern recognition, have bumped up the high temperatures on Sunday especially in Western MA and CT to mid and upper 50s. Models are also hinting at some elevated instability with about 20-25C of K Index and mid-level lapse rates of 6 to 6.5C/km. However, given we are still 4 days out and the timing of the aforementioned cold front is still in question, have only mentioned the chance of showers for late Sunday into early Monday.

Monday into Wednesday .

We remain in a broad 500mb ridge pattern for the first half of the work week so despite the passage of the weak cold front late Sunday into Monday, Monday is expected to feature above average temperatures. Normal highs for early April are generally in the lower to mid 50s. For Tuesday and Wednesday, however, enough disorganized pieces of shortwave will head our way from time to time to lend moderate confidence to the forecast at best. So have gone with a blend of guidance for this part of the forecast, which yields generally seasonable conditions and occasional showers.

AVIATION /06Z THURSDAY THROUGH MONDAY/. Forecaster Confidence Levels .

Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent.

Through 12z . MVFR cigs and light rain will be confined to Cape/Islands and into SE and east coastal MA, with VFR elsewhere.

Today . Moderate confidence. MVFR cigs and rain across eastern MA will slowly move west across SNE through the day reaching CT valley mid/late afternoon. Areas of IFR developing over Cape/Islands. NNW winds gusting up to 25 kt except up to 35 kt over Cape Cod and Islands.

Tonight . Moderate confidence. Widespread MVFR in periods of rain with areas of IFR along the coast and in the high terrain. N wind gusts to 25 kt along the immediate coast and up to 35 kt over Cape/Islands, with gusts increasing to 40-45 kt toward daybreak Cape/Islands.

Friday . Moderate confidence. MVFR/IFR conditions in periods of rain. NE gusts 40-50 kt Cape/Islands and 30-40 kt east coastal MA into SE MA and coastal RI.

KBOS Terminal . Overall moderate confidence. Mainly MVFR cigs in periods of rain although can't rule out IFR later today and tonight along with vsby restrictions.

KBDL Terminal . High confidence in trends, but lower confidence on exact timing. VFR trending to MVFR later this afternoon.

Outlook /Friday Night through Monday/ .

Friday Night: MVFR/IFR conditions possible. Strong winds with gusts up to 45 kt. Chance RA.

Saturday: Mainly VFR, with local IFR possible. Windy with local gusts up to 30 kt.

Saturday Night: VFR.

Sunday: Mainly VFR, with areas MVFR possible. Slight chance RA.

Sunday Night: Mainly VFR, with local MVFR possible. Breezy. Slight chance RA.

Monday: VFR.

MARINE. 430 PM update .

Ocean storm well south of New England Wed afternoon will track ENE to near 40N/60W Thu but then retrograde westward back toward 40N/70W benchmark 12z Fri. This will be accompanied by 55-60 kt low level NE jet at 2-3 kft above sea level surface. Thus potential NE storm force winds late Thu night into Fri. Long fetch will develop dangerous seas of up to 25 ft east of Cape Cod and Nantucket by 12z Fri.

Outlook /Friday Night through Monday/ .

Friday: Low risk for storm force winds with gusts up to 50 kt. Rough seas up to 23 ft. Rain likely.

Friday Night: Strong winds with gusts up to 45 kt. Rough seas up to 21 ft. Chance of rain.

Saturday: Low risk for Small Craft Advisory winds with gusts up to 30 kt. Rough seas up to 17 ft. Slight chance of rain.

Saturday Night: Winds less than 25 kt. Rough seas up to 12 ft.

Sunday: Winds less than 25 kt. Rough seas up to 10 ft.

Sunday Night: Winds less than 25 kt. Areas of rough seas. Slight chance of rain.

Monday: Winds less than 25 kt. Local rough seas.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . Coastal Flood Watch Friday morning for MAZ007-015-016-019- 022>024. Coastal Flood Advisory from 6 AM to 10 AM EDT this morning for MAZ024. High Wind Watch from Friday morning through late Friday night for MAZ022>024. RI . None. MARINE . Storm Watch from Friday morning through late Friday night for ANZ231-232-250-254-255. Gale Watch from Friday morning through late Friday night for ANZ230-233>237-251-256.

SYNOPSIS . Nocera/Loconto/Chai NEAR TERM . KJC SHORT TERM . Nocera LONG TERM . Loconto/Chai AVIATION . KJC/Loconto/Chai MARINE . Nocera/Loconto/Chai


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 8 mi61 min 42°F 44°F1003.2 hPa
44013 - BOSTON 16 NM East of Boston, MA 17 mi59 min N 19 G 23 41°F 43°F7 ft1002.6 hPa (-1.9)38°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 21 mi105 min NNE 23 G 27 40°F 42°F6 ft1001.8 hPa
IOSN3 - Isle of Shoals, NH 40 mi49 min N 21 G 25 39°F 1003.3 hPa (-2.2)37°F
44073 45 mi105 min N 19 G 23 41°F 41°F
CMLN3 45 mi165 min NW 25 38°F 43°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 46 mi59 min N 25 G 31 40°F 8 ft1001.3 hPa (-2.2)36°F
44098 - Jeffrey's Ledge, NH (160) 48 mi41 min 42°F8 ft

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA6 mi55 minN 12 G 2010.00 miLight Rain40°F33°F77%1004.1 hPa
Beverly, Beverly Municipal Airport, MA9 mi56 minNNW 1010.00 miLight Rain40°F34°F79%1003.5 hPa
Laurence G Hanscom Field Airport, MA18 mi58 minNNW 1010.00 miOvercast43°F28°F56%1005.6 hPa
East Milton, MA19 mi58 minN 13 G 24 mi38°F32°F79%1004.4 hPa
Lawrence Municipal Airport, MA21 mi55 minN 910.00 miLight Rain40°F34°F79%1005 hPa
Norwood, Norwood Memorial Airport, MA21 mi56 minN 9 G 1810.00 miOvercast44°F30°F60%1004 hPa

Link to 5 minute data for KBOS

Wind History from BOS (wind in knots)
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Last 24hrNW7NW8N8N10N9N9N11N15N14N16NE13NE13N11N12NE12NE10NE9N7N9N7N9N11N13N12
G20
1 day agoN12N12N11N12N11N12N12
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N12NE14NE13NE11E14E14E11E10E10E10--E9NE6N3NW4NW6N7
2 days agoN15N13N14N13NE12NE14NE12NE15NE14NE16NE11NE13NE15NE13NE15NE11NE12NE14
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Tide / Current Tables for Lynn, Lynn Harbor, Massachusetts
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Marblehead Channel, Massachusetts Current
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Marblehead Channel
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Thu -- 01:33 AM EDT     0.00 knots Slack
Thu -- 03:13 AM EDT     Moonset
Thu -- 03:40 AM EDT     0.40 knots Max Flood
Thu -- 06:23 AM EDT     Sunrise
Thu -- 07:18 AM EDT     -0.00 knots Slack
Thu -- 10:31 AM EDT     -0.34 knots Max Ebb
Thu -- 12:35 PM EDT     Moonrise
Thu -- 02:12 PM EDT     0.00 knots Slack
Thu -- 04:16 PM EDT     0.38 knots Max Flood
Thu -- 07:11 PM EDT     Sunset
Thu -- 07:59 PM EDT     -0.00 knots Slack
Thu -- 11:08 PM EDT     -0.29 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-0.10.10.40.40.30.30.1-0.1-0.3-0.3-0.3-0.3-0.3-0.10.20.40.40.30.2-0-0.2-0.3-0.3

Weather Map
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wmap_A
GEOS 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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Wind Forecast for Boston, MA (2,6,7,8)
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Ground Weather Radar Station Boston, MA
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Disclaimer:
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.