Friday, January17, 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 7:08AMSunset 4:39PM Friday January 17, 2020 11:47 AM EST (16:47 UTC) Moonrise 12:43AMMoonset 12:27PM Illumination 51% Phase: Third Quarter Moon; Moon at 22 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- 1101 Am Est Fri Jan 17 2020
.gale warning in effect until 2 pm est this afternoon...
This afternoon..NW winds 15 to 20 kt with gusts up to 35 kt. Waves 3 to 5 ft.
Tonight..NW winds 10 to 15 kt. Gusts up to 30 kt, decreasing to 20 kt after midnight. Waves around 2 ft.
Sat..NW winds 5 to 10 kt, becoming S in the afternoon. Waves 1 foot or less. Snow. Vsby 1 to 3 nm.
Sat night..S winds 10 to 15 kt, becoming sw after midnight. Gusts up to 20 kt. Waves around 2 ft. Snow with a chance of rain. Vsby 1 nm or less.
Sun..W winds 10 to 15 kt with gusts up to 30 kt. Waves around 2 ft. A chance of snow showers. Vsby 1 to 3 nm.
Sun night..W winds 10 to 15 kt with gusts up to 30 kt. Waves around 2 ft.
Mon through Tue night..NW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. 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 1101 Am Est Fri Jan 17 2020
Synopsis for massachusetts and rhode island coastal waters.. High pres builds in from the west today and tonight. Low pres will then track across the great lakes on Sat. This low will then track across northern new england Sat night into Sun morning before moving into the canadian maritimes by Sun afternoon. A cold front will cross the waters Sun night followed by high pres slowly building in from the west through the middle of next week. 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 171438 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 938 AM EST Fri Jan 17 2020

SYNOPSIS. Coastal low pressure over the Canada Maritimes will shift east today, with large high pressure settling over New England late today into tonight. High pressure shifts east ahead of low pressure that will bring accumulating snow late Saturday into Saturday night. A cold front crosses the region on Sunday with perhaps a few brief snow showers. Dry, but very cold weather follows Monday through Wednesday as large high pressure builds in from the west. This high pressure system moves east of the region by next Thursday and Friday allowing for temperatures to moderate, but with dry weather likely persisting.

NEAR TERM /THROUGH TONIGHT/.

930 AM Update .

Quite a blustery morning across southern New England. Temps at 9 am were in the teens and low 20s. However with sustained winds of 15 to 25 mph across much of the region, wind chills ranged from -10 to +10 F. Wind gusts ranged from 25 to 40 mph across the region. Some higher gusts were noted along the Cape/Islands. Wind gusts for today should be peaking late this morning, then start to diminish during this afternoon.

Abundant sunshine continues, except for some ocean effect clouds on the outer Cape. Forecast looks on track, so only minor adjustments made to the near term to reflect latest conditions.

Early Morning Update follows .

Northwest wind gusts continue to usher in very cold air into southern New England early this morning. Current temps down into the teens with wind chills well down in the single digits to even below zero across the high terrain. Clear skies too except for some ocean effect clouds and perhaps a few brief flurries/very light snow showers across the outer-Cape.

Strongest sustained and gust speeds today will continue to be across coastal MA into the Cape and the Islands, and there may be a minor uptick in gust speeds once the mixed layer deepens by late morning, but not expecting Advisory type gusts. This will also be the case in the interior, but wind gusts should be more commonly in the 30-40 mph range through the early afternoon. A more precipitous drop in sustained winds and gusts is expected across interior MA into CT/RI into the afternoon.

Other than ocean-effect flurries/very light snow showers that may brush the Outer Cape through the AM hrs, it will be sunny and very cold today. 925-850 mb thermal trough aloft settles across southern New England today, associated with 850 mb temps in the negative teens Celsius range. Thermal advection will likely weaken with time today, although insolation from plentiful sun will end up proving ineffective in terms of much warming. Showed high temperatures today only topping out in the upper teens to the mid/upper 20s.

For tonight, dry high pressure settles over Southern New England. This will foster near ideal radiational cooling conditions, with clear skies, light NW winds and bone-dry dewpoints in the single digits below zero. If we had a fresh snowpack around, temperatures would project even colder. Ended up heavily utilizing MOS guidance which performs the best in radiational cooling setups. This leads to lows between -5 and 0F across the Pioneer Valley, the lower to mid single digits across most of MA away from the coast as well into northern RI and northeast CT. Upper single digits to mid teens should be more common along the coasts and in the urban areas. This should be the coldest night, but without the winds to make it feel even worse.

SHORT TERM /SATURDAY THROUGH SATURDAY NIGHT/. Initial cold and dry ridge of high pressure builds steadily eastward into the western Atlantic waters by Saturday afternoon. Will start to see mid to high clouds lower and thicken with time as S flow increases. This occurs as a warm front associated with a primary surface cyclone over the Great Lakes progresses into central and eastern NY. This warm frontal feature will lift across our area into Saturday evening, bringing a period of accumulating snows to our area.

Given good consistency in model solutions over the last couple of days, Winter Storm Watches have now been hoisted for Saturday mid to late afternoon into early Sunday for western, central and northeast MA, northern CT into northwest Providence County in RI. The air mass preceding the warm front is expected to be plenty cold enough at the surface (bolstered by wet-bulb cooling once precipitation starts) to support all-snow as an initial precip type.

While there is some level of uncertainty on the exact start time to snow, the bulk of the accumulating snowfall is expected to occur Saturday evening, spreading from SW to NE with time. This is also when most models show a SWly low-level jet associated with warm advection aloft that will likely drive an axis of 925-700 mb frontogenetic forcing lifting NE from roughly 21z to 05z. The potential for heavy snowfall to fall at rates of an inch per hour will be possible in this time window in the Watch area. This will be especially the case where temperatures are expected to stay cold enough as all-snow for the duration, mainly into northern/central MA into the Berkshires. Temperatures will be steadily rising as the warm front lifts northward, which opens the door for some larger uncertainty on snow amounts across northern CT into northwest Providence County. These areas are still expected to see a plowable snowfall and could reach marginal/lower-end Warning criteria totals, but the potential for rain to mix in as temperatures warm above freezing may lead to more of a solid Advisory type snowfall. Because there remains enough of a chance that portions of or all of these areas experience snow totals that could approach or exceed warning thresholds, the Watch was expanded into Hartford through Windham Counties in CT and into northwest RI. There remains reasonably high confidence in more solid if still lower-end Warning criteria snowfall being met across western to northern into central MA. Accumulating snowfall is still anticipated further S/E towards the I- 95/Boston and Providence corridor into SE MA and central/southern RI, but warmer temperatures should cut into accumulations greatly. Later in the evening, a dryslot comes in aloft, which should result in rain or snow becoming more intermittent, setting the stage for drizzle or freezing drizzle with trace icing possible) moving into the after-midnight/pre-dawn hrs.

Storm total accumulations were generally little changed from prior forecasts. These values range from 4 to 8" in the Watch areas, tapering to 3-5" for the I-95 corridor including Boston-Providence into Bristol/Plymouth Counties, and into the 1-3" range across Cape Cod and into the South Shore into southern RI. It is worth noting that given temperatures and the likely moderate to heavy snow intensity, snow should have little difficulty sticking/accumulating on roads.

LONG TERM /SUNDAY THROUGH THURSDAY/. Highlights .

* A cold front crosses the region Sun with perhaps a few brief snow showers, but much of the day will be dry

* Dry but very cold Mon through Wed with the coldest temps expected Tue into Tue night

* Temps moderate Thu into Fri with mainly dry weather persisting

Details .

Sunday .

Mid level dryslot will already have already cutoff any significant precipitation before daybreak Sun. However, vigorous shortwave energy and an associated cold front will cross the region during the day Sun. Dry weather will dominate Sunday, but may see a few brief snow showers as the shortwave energy crosses the region. High temps should range from the mid to upper 30s in the high terrain to between 40 and 45 along the coastal plain. It will also be breezy.

Monday through Wednesday .

Upper trough across New England will result in very cold temperatures Mon through Wed. Temperatures will average below normal, which is a big change from what we have experienced most of the last month. The coldest weather looks to occur Tue and Tue night, behind a secondary cold front. Highs Tue probably range from the upper teens to lower 20s across the high terrain, to mainly the middle 20s elsewhere. Lows Tue night/early Wed will bottom out in the single digits in many locations with even some below zero readings possible in the normally coldest outlying locations of western MA.

While it will be very cold Mon/Tue and into Wed of next week, dry weather expected with large high pressure building in from the west. We may have to watch for a period of light ocean effect snow showers/flurries across portions of the Cape, but that is about it.

Thursday and Friday .

Upper trough lifts out of the northeast and is replaced by some upper level ridging. Both the GEFS/EPS signal above normal heights, so somewhat milder/above normal temperatures should return next Thu/Fri.

AVIATION /15Z FRIDAY THROUGH TUESDAY/. Forecaster Confidence Levels .

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

15Z TAF Update:

Today: High confidence.

VFR except some MVFR cigs until around 18Z along the outer- Cape in ocean effect clouds. NW winds will continue to be the primary aviation concern. NW wind gusts of 25 to 35 knots, with 35-40 kt gusts Cape and Islands. Sustained winds and gusts to then subside late in the day as ridge builds in from the west, to 10-15 kt gusts 20-30 kt areawide.

Tonight: High confidence.

VFR except some marginal MVFR cigs may impact portions of the Cape after midnight from ocean effect clouds. NW winds 10 kt, gusts 20-25 kt early, to steadily decrease to light (under 5 kt) in the interior, and around 4-8 kts Cape/Islands.

Saturday: High confidence thru 18z, moderate thereafter.

VFR through about 18z, though with lowering VFR cigs towards OVC in that period. West to east deterioration in flight categories toward MVFR-IFR type levels then generally anticipated due to lowering ceilings, with warm frontal precip falling as entirely snow at onset. High confidence on initial p-type of snow, though less confident on exact timing of lowering flight categories. Steady snow should mainly be impacting BAF/BDL/ORH prior to 00z. Prior to 00z, best chance of IFR or lower and snow accumulating on runways at these sites, with flurries/light snows eastern terminals.

Winds become SE/S and increase to 6-10 kt. Low-level wind shear becomes a greater concern after 18z as SW low-level jet picks up (925 mb winds ~40 kt).

KBOS Terminal . High confidence in TAF.

KBDL Terminal . High confidence in TAF.

Outlook /Sunday through Tuesday/ .

Sunday: Mainly VFR, with areas MVFR possible. Windy with areas of gusts up to 30 kt. Chance SHSN.

Sunday Night: VFR with gusts up to 30 kt.

Martin Luther King Jr Day through Tuesday: VFR. Breezy.

MARINE. Gale Warnings continue on all waters for today. A Freezing Spray Advisory continues until 11 am this morning for northeastern waters. NW gales should begin to gradually ease later today, earliest in the bays and harbors and later across the outer offshore waters. Gale warnings will eventually be replaced with SCAs as improvement in gusts becomes realized by late afternoon.

Today: NW winds 15-25 kt (near 30 kt well offshore), with gusts 35- 45 kt. By afternoon, gusts should be in the 35 kt range. Rough seas, 8-14 ft on the offshore waters with 4-8 ft closer to shore. Periods of ocean effect snow showers may briefly reduce visibility. Freezing spray.

Tonight: NW winds/gusts slacken to below-SCA criteria around midnight, becoming around 10 kt. Seas 6-10 ft becoming longer-period and decreasing to 2-4 ft late. Good visibility.

Saturday: Winds become S and increase to 10-15 kt with gusts 20 to 25 kt, highest southern waters. Seas 2-4 ft building to 3-5 ft late. Good visibility.

Outlook /Sunday through Tuesday/ .

Sunday: Moderate risk for gale force winds with gusts up to 35 kt. Rough seas up to 12 ft. Slight chance of rain showers, slight chance of snow showers. Visibility 1 to 3 nm.

Sunday Night: Moderate risk for gale force winds with gusts up to 35 kt. Rough seas up to 11 ft.

Martin Luther King Jr Day: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Local rough seas. Freezing spray.

Monday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of seas approaching 5 ft. Freezing spray.

Tuesday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Freezing spray.

BOX WATCHES/WARNINGS/ADVISORIES. CT . Winter Storm Watch from Saturday afternoon through Sunday morning for CTZ004. Winter Storm Watch from Saturday afternoon through Sunday morning for CTZ002-003. MA . Winter Storm Watch from Saturday afternoon through Sunday morning for MAZ004>007-012-014-026. Winter Storm Watch from Saturday afternoon through Sunday morning for MAZ002-003-008>011. RI . Winter Storm Watch from Saturday afternoon through Sunday morning for RIZ001. MARINE . Gale Warning until 4 PM EST this afternoon for ANZ231>235-237- 250-251-254>256. Gale Warning until 11 AM EST this morning for ANZ230-236. Freezing Spray Advisory until 11 AM EST this morning for ANZ231-250-251.

SYNOPSIS . Frank/Loconto NEAR TERM . Frank/Loconto/NMB SHORT TERM . Loconto LONG TERM . Frank AVIATION . Frank/Loconto/NMB MARINE . Frank/Loconto/NMB


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 8 mi47 min 1032.3 hPa (+2.8)
44013 - BOSTON 16 NM East of Boston, MA 17 mi57 min NW 23 G 29 20°F 44°F7 ft1031.8 hPa (+3.6)8°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 21 mi103 min NNW 23 G 29 17°F 43°F7 ft1030.3 hPa
IOSN3 - Isle of Shoals, NH 40 mi47 min WNW 22 G 25 13°F 1031.8 hPa (+2.4)-1°F
BGXN3 - Great Bay Reserve, NH 43 mi62 min WNW 8 14°F 1033 hPa-2°F
CMLN3 45 mi163 min W 29
44018 - SE Cape Cod 30NM East of Nantucket, MA 46 mi57 min NNW 27 G 35 20°F 12 ft1030.1 hPa (+3.2)10°F
44098 - Jeffrey's Ledge, NH (160) 48 mi39 min 44°F8 ft

Wind History for Providence, RI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA6 mi53 minNW 19 G 3010.00 miA Few Clouds and Breezy20°F-7°F29%1033.3 hPa
Beverly, Beverly Municipal Airport, MA9 mi1.9 hrsNW 17 G 2410.00 miFair16°F-4°F41%1032.2 hPa
Laurence G Hanscom Field Airport, MA18 mi56 minNW 16 G 2410.00 miFair18°F-9°F28%1035.7 hPa
Lawrence Municipal Airport, MA21 mi53 minNW 15 G 2110.00 miFair15°F-8°F35%1034.5 hPa
Norwood, Norwood Memorial Airport, MA21 mi1.9 hrsNW 16 G 2610.00 miFair19°F-5°F32%1033.2 hPa

Link to 5 minute data for KBOS

Wind History from BOS (wind in knots)
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1 day agoNW11NW11W11
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W9W7W9W7W5W8CalmSW6SW4NW3CalmCalmS5S6S4SE7SE10E8SE8SW4W18
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2 days agoE5SE6SE4S5SE5SE5SE6SE5S5S5S4S3S3CalmS4S7SW7SW8SW7W7W13
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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
Click for Map
Fri -- 01:18 AM EST     0.41 knots Max Flood
Fri -- 04:57 AM EST     -0.00 knots Slack
Fri -- 07:09 AM EST     Sunrise
Fri -- 08:00 AM EST     Last Quarter
Fri -- 09:16 AM EST     -0.34 knots Max Ebb
Fri -- 11:26 AM EST     Moonset
Fri -- 11:35 AM EST     0.00 knots Slack
Fri -- 01:52 PM EST     0.36 knots Max Flood
Fri -- 04:37 PM EST     Sunset
Fri -- 05:24 PM EST     -0.00 knots Slack
Fri -- 09:48 PM EST     -0.33 knots Max Ebb
Fri -- 11:58 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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0.30.40.40.40.2-0-0.2-0.3-0.3-0.3-0.3-0.20.10.30.40.40.30.1-0.1-0.2-0.3-0.3-0.3-0.2

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (11,2,3,4)
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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.