West Yarmouth, MA Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for West Yarmouth, MA

June 17, 2024 8:46 PM EDT (00:46 UTC) Change Location
Sunrise 5:04 AM   Sunset 8:19 PM
Moonrise 4:09 PM   Moonset 1:58 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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ANZ232 Nantucket Sound- 704 Pm Edt Mon Jun 17 2024

.small craft advisory in effect until 8 pm edt this evening - .

Tonight - SW winds around 15 kt with gusts up to 25 kt. Seas around 2 ft. Wave detail: sw 2 ft at 4 seconds and S 1 foot at 7 seconds.

Tue - SW winds around 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave detail: S 2 ft at 5 seconds and se 1 foot at 12 seconds.

Tue night - SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave detail: sw 2 ft at 4 seconds and S 1 foot at 7 seconds.

Wed - SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave detail: sw 2 ft at 3 seconds and S 1 foot at 6 seconds.

Wed night through Thu night - SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave detail: sw 3 ft at 4 seconds and S 1 foot at 8 seconds.

Fri through Sat night - S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave detail: sw 2 ft at 4 seconds and N 1 foot at 3 seconds.
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 704 Pm Edt Mon Jun 17 2024

Synopsis for massachusetts and rhode island coastal waters - High pres remains anchored over the far eastern outer waters through the rest of the workweek. This will maintain ssw wind gusts 20-25 knots on most waters through the workweek. Dry weather is expected until later Fri.


7 Day Forecast for Marine Location Near West Yarmouth, MA
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Area Discussion for - Boston, MA
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FXUS61 KBOX 172304 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 704 PM EDT Mon Jun 17 2024

SYNOPSIS
Dangerous heat and humidity arrives on Tuesday away from the south coast and peaks in the Wednesday through Friday time frame. Near to record breaking high temperatures are possible. The main threat for scattered showers and thunderstorms will be Friday into the weekend, but specific timing remains uncertain. We do expect the excessive heat to break this weekend, but it will remain very warm and humid.

NEAR TERM /UNTIL 6 AM TUESDAY MORNING/

Marginal instability exits across western MA with SBCAPES around 500 J/kg but lack of forcing will prevent any convection through the afternoon. Dry conditions tonight with mainly clear skies as upper level ridge builds north into SNE. Surface high pres moves further offshore with modest SW flow limiting radiational cooling with lows mainly in the 60s.

SHORT TERM /6 AM TUESDAY MORNING THROUGH 6 PM TUESDAY/
Tuesday...

* Dangerous heat and humidity ramps up away from the south coast * Low risk for an isolated t-storm in the interior

Very anomalous upper level ridge builds over New Eng. In fact, 500 mb heights are maxed out for this time of year relative to CFSR climatology. 925 mb temps increase to 24-26C in the interior which will translate to highs low-mid 90s away from the south coast with hottest temps in the CT and Merrimack valleys. SW flow will keep it cooler across RI and SE MA with highs mainly mid-upper 80s while the immediate south coast and Cape/Islands will be upper 70s to lower 80s. Dewpoints will be climbing into the mid-upper 60s with some 70 degree dewpoints in the CT and Merrimack valleys where heat indices are expected to reach the low 100s. Elsewhere, away from the south coast heat indices will reach mid-upper 90s. We converted the Excessive Heat Watches for Tue to heat advisories and we trimmed the heat advisory across much of RI and SE MA where heat advisories will fall short of criteria.

The heat and humidity will result in moderate instability developing with SBCAPES 1000-2000 J/kg. However, forcing is rather weak with ridging in place and there may be a cap in place. HRRR max updraft forecast is suggesting isolated to widely scattered convection developing in the afternoon/evening across interior MA so can't rule out a few showers or a t-storm but areal coverage will be limited and any storms will be short lived as deep layer shear is quite low.
Continued slight chc PoPs across interior MA.

Tuesday night...

Any convection will dissipate in the evening, otherwise looking at mainly clear to partly cloudy skies. Lows will be mostly in the mid- upper 60s.

LONG TERM /TUESDAY NIGHT THROUGH MONDAY/
Key Points...

* Dangerous Heat & Humidity continues through Fri

* Near Record Highs with Heat Indices from 98 to 106 degrees

* Main threat for scattered showers/t-storms is Fri into the weekend

* Excessive Heat breaks this weekend...but it still will be humid

Details...

We continue to beat the drum regarding an extended stretch of dangerous heat and humidity which will stretch through the end of the week. Guidance continues to be in excellent agreement that the peak of the heat occurs Wednesday and Thursday. Relief won't come quickly, though, as it will be a more gradual easing of high temperatures from Friday to the weekend. The culprit is a very anomalous ridge of high pressure (sinking air which heats the airmass) overhead. In fact, as the previous forecaster mentioned, the magnitude of this ridging (600 dm) is rarely seen in southern New England which signals the potential for record breaking heat.
The forecast hasn't changed much in the last 24 hours, with highs projected to peak on Thursday at or just over 100F in the warmest locations like the CT Valley and Merrimack Valley. Making the situation more dangerous is the moist airmass in place with dewpoints in the upper 60s and low 70s making it feel over 105F in spots. Thus, an Excessive Heat Watch continues for these locations, with a Heat Advisory elsewhere. Don't focus on the headline, however, as it will be dangerously hot regardless. Something that will exacerbate the hazard is that we'll get little relief at night, only cooling off to the upper 60s/low 70s. Expect mostly dry weather for Wed and Thu but a few scattered t-storms are possible.

Friday into the weekend we get a little relief, but the real airmass change won't come until a cold front arrives around Monday night/early Tuesday. That's when dewpoints will finally drop back toward the 50s. In the meantime, ahead of this cold front and its associated shortwave the airmass will remain largely unchanged Sat- Mon with highs in the 80s each day. The approaching shortwave will also increase the chance of showers and thunderstorms each day starting on Friday. Too soon to nail down timing details but unsettled weather looks more likely through Monday.

AVIATION /23Z MONDAY THROUGH SATURDAY/
Forecast Confidence Levels:

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

00z TAF Update...

Tonight...High confidence.

VFR. SW wind 5-10 mph.

Tuesday...High confidence.

VFR. Low risk for an isolated afternoon shower or t-storm across NW MA. SW wind 10-20 kt.

Tuesday night...High confidence.

VFR. S-SW wind 5-10 kt.

KBOS TAF...High confidence in TAF.

KBDL TAF...High confidence in TAF.

Outlook /Tuesday Night through Saturday/...

Tuesday Night through Thursday Night: VFR. Breezy.

Friday through Friday Night: VFR. Chance SHRA, isolated TSRA.

Saturday: VFR. Slight chance SHRA, isolated TSRA.

MARINE
Forecaster Confidence Levels:

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

Today:

Continued clear conditions with increasing southerly winds at 10-15 knots, gusting up to 25 knots across the near shore waters along the south coast. Opted to hoist a short-fused small craft advisory for these waters and seas may be choppy. Seas 2-4 ft

Tonight:

Clear conditions with slowly decreasing southwest winds 10-15 kts. Seas 2-4 ft.

Tomorrow:

Clear conditions with increasing southerly winds gusting 20-25 knots once again. Seas 2-4 ft

Outlook /Tuesday Night through Saturday/...

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

Juneteenth: Winds less than 25 kt.

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

Thursday Night: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain showers.

Friday through Saturday: Winds less than 25 kt. Slight chance of rain showers, isolated thunderstorms.

CLIMATE
All Time June High Temperature Record (Daily)

BOS - 100 F (06/06/1925, 06/26/1952 and 06/30/2021)
BDL - 100 F (06/26/1952, 06/30/1964)
PVD - 98 F (06/25/1943, 06/15/1945 and 06/30/1945)
ORH - 98 F (06/26/1952)

Most recent day of 100 F (or greater)

BOS - 100 F (07/24/2022)
BDL - 100 F (07/21/2019)
PVD - 100 F (07/28/2020)
ORH - 102 F (07/04/1911)*

* For ORH this is the only 100+ degree day in its period of record.

Daily High Temperature Records...

June 18th

BOS - 94 F (1907 and 1929)
BDL - 95 F (1957 and 1994)
PVD - 94 F (1929)
ORH - 93 F (1907 and 1929)

June 19th

BOS - 96 F (1923)
BDL - 95 F (1995)
PVD - 94 F (1923)
ORH - 93 F (1923)

June 20th

BOS - 98 F (1953)
BDL - 97 F (2012)
PVD - 95 F (1941)
ORH - 93 F (1953)

June 21st

BOS - 96 F (2012)
BDL - 96 F (1953 and 2012)
PVD - 96 F (1941)
ORH - 91 F (Multi-Years)

Daily Warmest Low Temperatures Records...

June 18th

BOS - 72 F (1929)
BDL - 70 F (1905)
PVD - 72 F (1929)
ORH - 69 F (1905 and 1994)

June 19th

BOS - 73 F (1995)
BDL - 72 F (1929)
PVD - 70 F (1995)
ORH - 72 F (1929)

June 20th

BOS - 78 F (1931)
BDL - 74 F (1931)
PVD - 74 F (1931)
ORH - 72 F (1931)

June 21st

BOS - 80 F (2012)
BDL - 73 F (1923 and 2012)
PVD - 75 F (2012)
ORH - 74 F (1923 and 2012)

BOX WATCHES/WARNINGS/ADVISORIES
CT...Air Quality Alert from 11 AM to 11 PM EDT Tuesday for CTZ002.
Excessive Heat Watch from Tuesday afternoon through Friday evening for CTZ002-003.
Heat Advisory from noon to 7 PM EDT Tuesday for CTZ002-003.
Heat Advisory from noon Tuesday to 7 PM EDT Friday for CTZ004.
MA...Air Quality Alert from 11 AM to 11 PM EDT Tuesday for MAZ005>007-010>012.
Excessive Heat Watch from Tuesday afternoon through Friday evening for MAZ003-005-006-010-011-013-014.
Heat Advisory from noon to 7 PM EDT Tuesday for MAZ003-005-006- 010-011-013-014.
Heat Advisory from noon Tuesday to 7 PM EDT Friday for MAZ002- 004-007>009-012-015-016-026.
Heat Advisory from noon Wednesday to 7 PM EDT Friday for MAZ017>019.
RI...Heat Advisory from noon Tuesday to 7 PM EDT Friday for RIZ001.
Heat Advisory from noon Wednesday to 7 PM EDT Friday for RIZ002>005.
MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ231>236-250-251-254-255.




Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
44020 - NANTUCKET SOUND 7 mi36 minSSW 14G18 66°F 68°F30.1865°F
44090 17 mi46 min 64°F2 ft
CHTM3 18 mi46 min 85°F 30.19
BZBM3 - 8447930 - Woods Hole, MA 22 mi46 min 67°F 67°F30.19
NTKM3 - 8449130 - Nantucket Island, MA 24 mi46 minS 8G14 64°F 70°F30.21
NBGM3 34 mi46 minWSW 8.9G12 69°F 30.20
44018 - SE Cape Cod 30NM East of Nantucket, MA 42 mi66 min 63°F2 ft
44085 43 mi46 min 66°F 64°F3 ft
BUZM3 - Buzzards Bay, MA 43 mi46 minSSW 13G15 67°F 30.20
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 48 mi46 minSSW 8.9G11 71°F 30.18
FRVM3 - 8447386 - Fall River, MA 48 mi46 min 72°F 70°F30.20
FRXM3 49 mi46 min 71°F 62°F


Wind History for Nantucket Island, MA
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Airport Reports
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Wind History graph: HYA
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Tide / Current for Hyannis Port, Nantucket Sound, Massachusetts (2)
   
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Hyannis Port
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Mon -- 01:58 AM EDT     Moonset
Mon -- 02:50 AM EDT     0.51 feet Low Tide
Mon -- 05:06 AM EDT     Sunrise
Mon -- 09:32 AM EDT     2.68 feet High Tide
Mon -- 03:00 PM EDT     0.58 feet Low Tide
Mon -- 04:08 PM EDT     Moonrise
Mon -- 08:18 PM EDT     Sunset
Mon -- 09:49 PM EDT     3.01 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Hyannis Port, Nantucket Sound, Massachusetts (2), Tide feet
12
am
1.8
1
am
1.2
2
am
0.7
3
am
0.5
4
am
0.7
5
am
1
6
am
1.4
7
am
1.9
8
am
2.4
9
am
2.6
10
am
2.6
11
am
2.4
12
pm
1.9
1
pm
1.3
2
pm
0.8
3
pm
0.6
4
pm
0.7
5
pm
1.1
6
pm
1.5
7
pm
2
8
pm
2.5
9
pm
2.9
10
pm
3
11
pm
2.8


Tide / Current for Pollock Rip Channel, Massachusetts Current
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Pollock Rip Channel
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Mon -- 12:17 AM EDT     0.00 knots Slack
Mon -- 01:57 AM EDT     Moonset
Mon -- 03:50 AM EDT     1.74 knots Max Flood
Mon -- 05:05 AM EDT     Sunrise
Mon -- 06:51 AM EDT     -0.00 knots Slack
Mon -- 09:32 AM EDT     -1.38 knots Max Ebb
Mon -- 12:34 PM EDT     0.00 knots Slack
Mon -- 04:07 PM EDT     Moonrise
Mon -- 04:07 PM EDT     1.73 knots Max Flood
Mon -- 07:07 PM EDT     -0.00 knots Slack
Mon -- 08:16 PM EDT     Sunset
Mon -- 09:55 PM EDT     -1.55 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Pollock Rip Channel, Massachusetts Current, knots
12
am
-0.2
1
am
0.6
2
am
1.2
3
am
1.6
4
am
1.7
5
am
1.5
6
am
0.8
7
am
-0.1
8
am
-0.9
9
am
-1.3
10
am
-1.3
11
am
-1
12
pm
-0.4
1
pm
0.3
2
pm
1.1
3
pm
1.5
4
pm
1.7
5
pm
1.6
6
pm
1
7
pm
0.1
8
pm
-0.8
9
pm
-1.4
10
pm
-1.6
11
pm
-1.4


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Boston, MA,




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