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Marine Weather and Tide Forecast for Nahant, MA

June 24, 2024 4:37 PM EDT (20:37 UTC) Change Location
Sunrise 5:06 AM   Sunset 8:26 PM
Moonrise 11:01 PM   Moonset 7:30 AM 
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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- 403 Pm Edt Mon Jun 24 2024

Tonight - NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. Isolated showers.

Tue - NW winds 5 to 10 kt, becoming W in the afternoon. Waves 1 foot or less.

Tue night - SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Waves 1 foot or less.

Wed - SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers in the afternoon.

Wed night - SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. Showers and scattered tstms.

Thu - W winds 5 to 10 kt. Waves 1 foot or less. Showers likely in the morning.

Thu night - NW winds 5 to 10 kt. Waves 1 foot or less.

Fri through Sat - S winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.

Sat night - S winds around 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers.
winds and waves higher in and near tstms.
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 403 Pm Edt Mon Jun 24 2024

Synopsis for massachusetts and rhode island coastal waters - High pressure builds south of the waters overnight and Tuesday. The next cold front moves east from the great lakes on Wednesday, but ahead of the cold front, strong southwest winds and building seas. The cold front crosses new england and the waters late Wednesday night and Thursday. High pressure builds over the waters Friday into Saturday. With the next chances of showers and storms with a cold front on Sunday.


7 Day Forecast for Marine Location Near Nahant, MA
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Area Discussion for - Boston, MA
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FXUS61 KBOX 241855 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 255 PM EDT Mon Jun 24 2024

SYNOPSIS
A disturbance aloft over the Northern Adirondacks moves southeastward tonight, bringing evening cloudiness, northwest breezes and a drier air mass to Southern New England. Warmer temperatures then return for Tuesday but humidity levels remain comfortable. Increasing humidity levels on Wednesday with the risk for showers and thunderstorms, and some could become strong. Drier and less humid to end the workweek, although summerlike warmth and humidity return by this weekend.

NEAR TERM /THROUGH TONIGHT/
145 PM Update:

Other than across Cape Cod where dewpoints remain in the upper 60s to around 70 as westerly windshift still is working its way into the Cape, further inland humidity levels are dropping. For the vast majority of locations, dewpoints are falling into the mid 50s to around 60, leading to a far more comfortable air mass than we've experienced of late. From a bigger picture view, a rather potent shortwave trough aloft circulating over the Northern Adirondacks in NY is leading to an increasing coverage of puffy stratocumulus cloudiness this afternoon in Southern New England. Radar is picking up on either sprinkles or very light rain showers dotting the Berkshires with the cooler pocket of air aloft tied to the shortwave trough. This shortwave trough aloft will be the main driver of our weather tonight.

So for tonight, shortwave disturbance aloft and its cool pocket of air aloft will be moving through the interior Northeast and offshore through midnight. The approach of this disturbance should at least maintain cloud cover if not increase it a bit.
Think cloud cover should trend more partial to mostly cloudy. An outside chance (20% or less) of a sprinkle or light shower as the shortwave moves through. Am a little skeptical the coverage will be as numerous as some of the high res models indicate with drier air moving into the lowest hundred or so mb of atmosphere. Carried a mention of isolated showers but with nil QPF over northern and northeast portions of Southern New England, but many areas however stay dry. Should also see more northwesterly breezes for the evening and overnight, which will continue to usher in lowering dewpoints and a more comfortable air mass. Humidity levels should be low enough tonight to give fans/ACs a break for more open-windows. Lows tonight in the mid 50s to lower 60s, with mid 60s out over Cape Cod.

SHORT TERM /TUESDAY THROUGH TUESDAY NIGHT/

Brief shortwave ridge and weak high pressure will bring very pleasant weather again tomorrow. Mid level winds turn SW Tuesday afternoon allowing for 850mb temps to warm from +13C to +17C. This will bring high temperatures back into the upper 80s to low 90s. With westerly surface winds, dewpoints will remain in a comfortable range in the upper 50s. Skies should remain mostly sunny through the day with subsidence aloft helping suppress diurnal cumulus. Late in the day, mid to high level cirrus clouds may bring some filtered sunshine ahead of a weak shortwave moving through overnight.

Surface winds turn southwest overnight, brining moisture rich flow into the region. This will bring dewpoints back into the low to mid 60s. Winds overnight also turn gusty at 15-20mph as the pressure gradient tightens ahead of the next system for Wednesday. This will keep overnight temps quite warm in the upper 60s to low 70s near urban centers.

LONG TERM /WEDNESDAY THROUGH MONDAY/

Highlights:

* Wednesday is hot, muggy, and late day thunderstorms. A few showers could linger into Thursday morning across southeastern parts of southern New England.

* A post-frontal airmass provides relief from the heat and muggies late this week, along with drier conditions.

* Upcoming weekend looks splits, with the unsettled conditions likely on Sunday.

Rain and thunderstorm chances increase the second-half of Wednesday with a mid-level trough and shortwave passage. For now, most of the daylight hours Wednesday appear dry. Deep southwest flow ahead of the approaching front advects a warm/moist airmass into southern New England. Likely a hot and muggy day with highs in the upper 80 to lower 90s, with dew points near 70F, courtesy of PWATs nearing the two inch mark. Combination of heat and humidity provides instability for storms late day. Best forcing at this time comes around late afternoon and evening and exits during the overnight hours. The discussion earlier stated a remnant EML from the upper Midwest could be in the vicinity late in the day, 21z-ish, but latest 12z model guidance suggests this feature could be over us by 12z/15z. There is still some uncertainty with how strong and widespread these storms could become. But there are signs for a few stronger storms, SHRRR has surface based CAPE around 1,000 to 1,500 J/kg, along with modest wind shear, 30 to 40 knots. Additionally, the 12z CSU machine learning probs for severe weather/winds did back off slightly across the northeast, though maintained the greatest risk for severe weather across the Mid Atlantic states. Did maintain the greatest pops between 00z and 10z, though there could be lingering showers on Thursday morning as the front is slow to exit the coastal waters.
Places like Cape Cod and the Island could see a few showers up until lunch before improving.

It's important to note, those seeking a bit of relief from the heat and muggy conditions at the ocean, there is a chance for stronger rip currents. While there are no headlines, yet, future updates may include a statement or advisory for this hazard.

Comfortable conditions Thursday with a post-frontal airmass due to surface surface high moving down out of central Canada into northern Great Lakes region. Drier weather to follow the rest of Thursday into Friday, daily highs in the upper 70s and low 80s, dew points are in the low 60s on Thursday and 50s on Friday.

Heading into this coming weekend, potentially a split weekend with drier weather on Saturday with showers and thunderstorms on Sunday.
Model guidance suggests a system developing across the northern Great Lakes with a trailing cold front. Still too early to get into the details, but looks as if the later half of the weekend could be unsettled.

AVIATION /18Z MONDAY THROUGH SATURDAY/
Forecast Confidence Levels:

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

18z TAF Update:

Through 00z Tuesday: High confidence.

SCT-OVC VFR bases 045-060. W to WNW winds 10-15 kt with gusts 20-25 kt for most, with SW to WSW winds around 10-12 kt for the South Coast, Cape and Islands.

Tonight: High confidence.

BKN-OVC VFR bases 035-050 to start tonight, with an outside chance (20% or less) of a sprinkle or light unrestricted shower 00z thru 04z but will leave out of the TAFs due to low prob. NW to NNW winds around 12-15 kt with gusts low 20s kt range thru midnight, then becoming NW around 8-12 kt, highest east.

Tuesday and Tuesday Night: High confidence.

VFR with increasing mid/high clouds arriving later Tue night.
NW winds 5-10 kt ease a bit and shift to W/WSW by aftn.

KBOS TAF...High confidence in TAF. VFR with WNW winds around 10-15 kt with gusts up to 25 kt today. Low (< 15%) chance of an unrestricted-visby shower tonight with winds shifting to NW around 15 kt overnight. Winds then shift back to WNW/W Tue AM with decreasing speeds, becoming SW late in the day on Tue.

KBDL TAF...High confidence in TAF. VFR. W winds around 10-15 kt become NW/N late this aftn and tonight at similar speeds. Winds then shift early Tue to W and then SW later Tue aftn.

Outlook /Wednesday through Saturday/...

Wednesday: VFR. Breezy. Chance SHRA, isolated TSRA.

Wednesday Night: Mainly MVFR, with areas VFR possible. Breezy.
SHRA likely, isolated TSRA.

Thursday: VFR. Chance SHRA.

Thursday Night through Friday Night: VFR.

Saturday: VFR. Breezy. Slight chance SHRA.

MARINE
Forecaster Confidence Levels:

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

Tonight...
High pressure begins to move in allowing winds to turn north and weaken to 10-15 knots. Seas also decrease 3-6 feet.

Tomorrow...

Mainly clear conditions with winds turning SSW. Gusts begin to ramp up again in the southern waters to 20-25 knots. Seas decrease to 2-4 feet

Tomorrow night...

Southwesterly winds continue to ramp up across all the waters with gusts up to 30 knots again. Seas ramp back up to 3-6 feet.
Small Craft Advisories will likely be needed for the this period.

Outlook /Wednesday through Saturday/...

Wednesday: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain showers, isolated thunderstorms.

Wednesday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Local rough seas. Rain showers likely, isolated thunderstorms.

Thursday: Winds less than 25 kt. Areas of seas approaching 5 ft. Chance of rain showers, isolated thunderstorms.

Thursday Night: Winds less than 25 kt. Seas locally approaching 5 ft.

Friday through Saturday: Winds less than 25 kt.

BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...High Surf Advisory until 7 PM EDT this evening for MAZ020>024.
RI...High Surf Advisory until 7 PM EDT this evening for RIZ006>008.
MARINE...Small Craft Advisory until 3 AM EDT Tuesday for ANZ232>235-237.
Small Craft Advisory until 3 PM EDT Tuesday for ANZ254>256.




Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
BHBM3 - 8443970 - Boston, MA 8 mi49 min 29.51
44013 - BOSTON 16 NM East of Boston, MA 17 mi37 minW 5.8G7.8 67°F 63°F29.5259°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 21 mi93 minW 5.8G7.8 67°F 62°F2 ft29.51
IOSN3 - Isle of Shoals, NH 40 mi37 minW 13G14 74°F 29.4951°F
BGXN3 - Great Bay Reserve, NH 43 mi112 minW 5.1 76°F 29.5363°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 45 mi57 min 60°F2 ft
44073 45 mi72 minW 5.8G7.8 71°F 63°F
SEIM1 45 mi49 min 55°F29.53
44098 - Jeffrey's Ledge, NH (160) 48 mi41 min 65°F3 ft


Wind History for Providence, RI
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Airport Reports
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Wind History graph: BOS
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Tide / Current 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.

Lynn, Lynn Harbor, Massachusetts, Tide feet


Tide / Current for Boston Harbor, Massachusetts Current
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Boston Harbor
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Mon -- 12:55 AM EDT     -0.00 knots Slack
Mon -- 04:23 AM EDT     -1.18 knots Max Ebb
Mon -- 05:08 AM EDT     Sunrise
Mon -- 07:30 AM EDT     Moonset
Mon -- 07:45 AM EDT     0.00 knots Slack
Mon -- 10:03 AM EDT     1.18 knots Max Flood
Mon -- 01:29 PM EDT     -0.00 knots Slack
Mon -- 04:46 PM EDT     -1.02 knots Max Ebb
Mon -- 08:02 PM EDT     0.00 knots Slack
Mon -- 08:24 PM EDT     Sunset
Mon -- 10:17 PM EDT     1.21 knots Max Flood
Mon -- 11:01 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Boston Harbor, Massachusetts Current, knots
12
am
0.6
1
am
-0.1
2
am
-0.6
3
am
-1
4
am
-1.2
5
am
-1.2
6
am
-1
7
am
-0.6
8
am
0.2
9
am
1
10
am
1.2
11
am
1.1
12
pm
0.9
1
pm
0.3
2
pm
-0.3
3
pm
-0.7
4
pm
-1
5
pm
-1
6
pm
-0.9
7
pm
-0.7
8
pm
-0
9
pm
0.8
10
pm
1.2
11
pm
1.2


Weather Map
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GEOS Local Image of Northeast   
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Boston, MA,




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