L-36.com
Top   Marine   7-Day   NWS   Buoy   Airport   Tide   Map   GEOS   Radar   TAF  

Marine Weather and Tide Forecast for West Chatham, MA

June 25, 2024 3:32 PM EDT (19:32 UTC) Change Location
Sunrise 5:06 AM   Sunset 8:21 PM
Moonrise 11:25 PM   Moonset 8:46 AM 
  Print   HELP   Reset   Save   Recall  News
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
    EDIT      HIDE   Help
ANZ254 Coastal Waters From Provincetown Ma To Chatham Ma To Nantucket Ma Out 20 Nm- 103 Pm Edt Tue Jun 25 2024

.small craft advisory in effect through Wednesday evening - .

This afternoon - SW winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave detail: S 4 ft at 8 seconds and nw 2 ft at 5 seconds.

Tonight - SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave detail: W 3 ft at 5 seconds and S 3 ft at 8 seconds.

Wed - SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave detail: sw 5 ft at 6 seconds.

Wed night - SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave detail: S 5 ft at 7 seconds and W 2 ft at 4 seconds. A chance of showers in the evening. Showers likely after midnight.

Thu - SW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave detail: S 5 ft at 7 seconds and W 1 foot at 4 seconds. Showers likely, mainly in the morning.

Thu night - SW winds 5 to 10 kt, becoming nw after midnight. Seas 2 to 4 ft. Wave detail: S 3 ft at 7 seconds and nw 2 ft at 3 seconds.

Fri through Sat - S winds 10 to 15 kt. Seas 2 to 3 ft.

Sat night - S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers.
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 103 Pm Edt Tue Jun 25 2024

Synopsis for massachusetts and rhode island coastal waters - High pres builds S of the waters today. The next cold front moves E from the great lakes Wed, with strong sw winds and building seas ahead of it. This cold front crosses new england and the waters late Wed night and Thu. High pres builds over the waters Fri into Sat. Another cold front should cross the waters sometime late Sun into Sun night.


7 Day Forecast for Marine Location Near West Chatham, MA
   Hourly   EDIT   Help   Map   HIDE
NEW! Add second zone forecast


Area Discussion for - Boston, MA
      HIDE   Help   
NOTE: mouseover dotted underlined text for definition
470 FXUS61 KBOX 251900 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 300 PM EDT Tue Jun 25 2024

SYNOPSIS
Although we will see an increase in cloud cover tonight, dry weather and southwest breezes are expected. Increasing humidity levels for Wednesday, with a risk for showers and thunderstorms later in the afternoon into the evening. Some storms could turn strong Wednesday afternoon and evening. Drier weather for late in the week along with decreasing humidity levels. However we enter a warming trend with increasing humidity into the weekend, which will also increase our chances for showers and thunderstorms this weekend.

NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/
150 PM Update:

Pleasant afternoon across Southern New England this afternoon under influence of surface ridge of high pressure. Temperatures at this hour are in the 80s for most, with mid to upper 80s being common over the interior. Northerly breezes and tolerable levels of humidity (e.g. dewpoints in the mid 50s to around 60)
are accompanying this summer warmth, so all in all, hard to find much fault in the weather today. Well to the west over the eastern Gt Lakes/far western NY, day cloud phase satellite imagery shows quite a plume of mid to high level cloud cover within a seasonably strong belt of westerly flow aloft. This is associated with a re-organizing cluster of strong thunderstorms over OH and Lower MI; while this active area of thunderstorms will remain over OH and PA well to our west with high confidence, its associated shield of mid and high cloud cover will be overspreading our area for the evening and overnight.

So for tonight...expect winds to gradually shift from a WNW direction to a WSW/SWly one around 10 mph. With that windshift will bring the aforementioned shield of mid and high level cloud cover that is over the eastern Gt Lakes region. Despite high res guidance insisting otherwise, this guidance is too bullish in showing any rain with this shield of cloud cover as it is (1)
too high in the sky to generate any precipitation and (2) quite dry in the lowest few thousand feet AGL to support precip. So really just expecting an increase in midlevel cloud cover but looking for dry weather for the balance of the evening and overnight. It will however start to bring humidity levels back up some with dewpoints in the lower 60s by daybreak Wed, but still fairly tolerable overall. Sided lows toward the milder end of guidance since SW winds should stay up all night and the advancing canopy of midlevel cloud cover should mitigate much radiational cooling. Opted for lows in the mid 60s, with upper 60s/around 70 possible in the urban areas.

SHORT TERM /6 AM WEDNESDAY MORNING THROUGH WEDNESDAY NIGHT/
The most active period of the forecast continues to be centered on a shortwave and associated cold front that will move from the Midwest to the Great Lakes and into the Northeast on Wednesday. At the mid levels we`ll see zonal flow become more meridional through the day on Wednesday as the neutrally tilted trough axis digs into NY/PA.
The progression of the trough and cold front has been slowing down over the last few days and with it the severe threat decreasing for our area thanks to misalignment of the best forcing and axis of max instability/shear. CSU machine learning probs of severe winds are in line with this trend, continuing to back west where we expect the better chance of severe weather. The warm, moist air that is advected into SNE during the day on Wednesday behind a warm front will lead to much more humid conditions and destabilization, especially for areas south of a Hartford-Worcester-Boston line. This is because hi-res guidance is indicating a weak shortwave and cold front ahead of the main front which may keep dewpoints lower in northwest/north central MA as it stalls overhead. Convergence associated with this boundary may be the focus for a few isolated thunderstorms Wednesday evening ahead of the main line, but the bulk of the action should be overnight, between 8pm and 4am as the cold front crosses the region. Confidence in the placement of this boundary is low to moderate, however. Strengthening mid level flow in the 500-700 mb layer will increase the 0-6 km bulk shear to 30-40 kts in the afternoon/evening so if there is enough lift to kick off a storm in the 1500 J/kg CAPE environment there is potential a storm could be organized enough to become severe. However, odds are low, and by the time the best lift arrives overnight the instability will have waned substantially making severe weather unlikely.

LONG TERM /THURSDAY THROUGH TUESDAY/
Highlights:

* Showers and a few t-storm lingering SE New Eng Thu AM, otherwise improving conditions

* Dry and seasonable Fri with low humidity

* Another round of scattered showers/t-storms Sat afternoon into Sun. Becoming rather humid Sun

* Dry and less humid Mon & Tue

Thursday and Friday...

Expect improving conditions from west to east on Thu as deep moisture axis will be moving offshore. Still some timing differences with how quickly the moisture moves to the east but consensus of the deterministic and ensemble guidance suggests showers and a few t- storms lingering Thu morning across SE New Eng near the cold front, then should see at least partial sunshine developing from west to east as good mid level drying moves in. Mid level shortwave will be passing to the north Thu afternoon so can`t rule out a spot shower but better chance will be across northern New Eng closer to the cold pool aloft. Highs should reach into the 80s with decreasing humidity in the interior, but it will remain humid in the coastal plain as weak front hangs up near the coast.

The mid level trough moves to the east Thu night with high pres building into New Eng through Fri. This will result in clear skies Thu night and abundant sunshine Friday. Highs Fri will be in the upper 70s to near 80, with coastal sea-breezes developing. Humidity levels will be rather low as dewpoints drop into the 40s and lower 50s.

Saturday into Sunday...

Next mid level trough will be moving east across the Gt Lakes and approaching New Eng Sun evening. Deeper moisture axis with high PWATs exceeding 2 inches will be moving into SNE, especially during the afternoon and Sat night. Risk for showers and a few t-storms will be increasing in the west Sat afternoon, but better chance will be Sat night into Sunday across entire region as forcing for ascent and instability increases ahead of the mid level trough along with the cold front moving into SNE Sun afternoon. Given rather high PWAT airmass, heavy rainfall will be the primary threat, but as surface instability increases on Sunday will have to watch the potential for a few strong storms. A lot will depend on timing of drier air moving in from the west which is uncertain at this time range. Temps will be close to seasonable norms but humidity levels will begin to increase late Sat-Sat night, peaking on Sunday with oppressive humidity possible as dewpoints potentially reach the low to mid 70s.

Monday and Tuesday...

Cold front moves offshore Sun night followed by high pres and much drier airmass Mon into Tue. Will set the stage for sunshine, seasonable temps and low humidity early next week.

AVIATION /19Z TUESDAY THROUGH SUNDAY/
Forecast Confidence Levels:

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

18z TAF Update:

Through 00z Wednesday: High confidence.

VFR. WNW winds around 10 kt to begin a gradual turn/backing to WSW/SW through late-aftn. Still a window for a seabreeze on the eastern MA coast between 18-20z but indicated TEMPO for this potential.

Tonight: High confidence.

VFR, although with an increasing canopy of mid to high clouds (at/above 11kft) tonight. SW winds around 7-10 kt.

Wednesday and Wednesday Night: High confidence in the morning, then becomes moderate for the afternoon/evening.

VFR with SW winds around 10-12 kt (gusts 23-27 kt) during the morning to at least the early aftn. Scattered t-storms are still anticipated, better shot along/south of I-90, but the timing is uncertain. Storms could begin in the 18-21z timeframe but seem more likely after 21z and into the evening hours. Some storms could be strong, especially if they develop on the earlier end of that timing window. SW winds ease to around 5-10 kt for the evening while shifting a bit to W late.

KBOS TAF...High confidence in TAF, though moderate on sea-breeze development. VFR for much of the TAF period. WNW winds around 10 kt to start, though may slacken enough in the 18-20z window for a possible seabreeze. By late-aftn, winds shift to SW/WSW around 10 kt. Possible TS after 21z Wed but timing is still uncertain.

KBDL TAF...High confidence in TAF. VFR for most of the TAF period. Winds to become SW around 10 kt this aftn/tonight with increasing covg of mid/high clouds. Possible TS after 18z Wed though timing is still uncertain.

Outlook /Thursday through Sunday/...

Thursday: VFR. Breezy. Slight chance SHRA.

Thursday Night through Friday Night: VFR.

Saturday: VFR. Breezy. Chance SHRA.

Saturday Night: MVFR/IFR conditions possible. Breezy. SHRA likely, chance TSRA.

Sunday: Mainly MVFR, with local IFR possible. Breezy. SHRA likely, chance TSRA.

MARINE
Forecaster Confidence Levels:

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

Small Craft Advisories have been extended for the most of the southern waters through Wed night. Though seas/winds will fall below SCA conditions this evening, they will redevelop tonight into Wed with a strong SWly low level jet sliding in.

Tonight...High confidence.

Increasing SW to SSW winds with gusts of 20-30 kts. Seas building 3-6 ft across the southern and eastern outer waters.

Wednesday...High confidence.

Winds remain out of the SW/SSW at 15-25 kts with gusts of 20-30 kts. Seas 4-6 ft across the southern waters and eastern outer waters. Scattered thunderstorms could spread into the waters late in the afternoon/evening.

Wednesday night...High confidence.

Winds SW 15-25 kts with gusts of 20-30 kts. Seas 5-7 ft.
Scattered showers and thunderstorms continue into the morning.

Outlook /Thursday through Sunday/...

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

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

Friday through Friday Night: Winds less than 25 kt.

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

Saturday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Chance of rain showers, slight chance of thunderstorms.

Sunday: Low risk for Small Craft Advisory winds with gusts up to 20 kt. Seas up to 5 ft. Rain showers likely, chance of thunderstorms.

BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 8 PM this evening to 8 PM EDT Wednesday for ANZ231>234.
Small Craft Advisory from 8 PM this evening to 8 AM EDT Thursday for ANZ235-237.
Small Craft Advisory from 2 AM to 8 PM EDT Wednesday for ANZ236.
Small Craft Advisory until 8 AM EDT Thursday for ANZ254>256.




Weather Reporting Stations
   EDIT       HIDE   Help
Stations Dist Age Wind AirWater WavesinHgDewPt
CHTM3 3 mi62 min 85°F 29.83
44090 20 mi62 min 72°F1 ft
44020 - NANTUCKET SOUND 23 mi42 minSSW 9.7G12 72°F 73°F1 ft29.8268°F
NTKM3 - 8449130 - Nantucket Island, MA 31 mi62 minW 8G11 77°F 73°F29.85
44018 - SE Cape Cod 30NM East of Nantucket, MA 34 mi52 min 60°F2 ft
BZBM3 - 8447930 - Woods Hole, MA 40 mi62 min 73°F 72°F29.84


Wind History for Nantucket Island, MA
(wind in knots)    EDIT      HIDE   Help
toggle option: (graph/table)



Airport Reports
    EDIT      HIDE   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KCQX CHATHAM MUNI,MA 3 sm40 minNW 0610 smClear84°F54°F35%29.83
KHYA BARNSTABLE MUNIBOARDMAN/POLANDO FIELD,MA 17 sm36 minSSW 09G1610 smClear81°F63°F54%29.81
Link to 1 hour of 5 minute data for KCQX
   
NEW Forecast page for KCQX (use "back" to return)

Wind History graph: CQX
(wind in knots)
toggle option: (graph/table)


Tide / Current for Pleasant Bay, Quonset Pont, Massachusetts
   
EDIT   Weekend mode (on/off)   HIDE   Help
Pleasant Bay
Click for Map
Tue -- 04:43 AM EDT     3.74 feet High Tide
Tue -- 05:06 AM EDT     Sunrise
Tue -- 08:46 AM EDT     Moonset
Tue -- 11:48 AM EDT     -0.18 feet Low Tide
Tue -- 05:21 PM EDT     3.23 feet High Tide
Tue -- 08:18 PM EDT     Sunset
Tue -- 11:25 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Pleasant Bay, Quonset Pont, Massachusetts, Tide feet
12
am
0.5
1
am
1.1
2
am
2
3
am
2.9
4
am
3.6
5
am
3.7
6
am
3.3
7
am
2.6
8
am
1.8
9
am
1.2
10
am
0.5
11
am
-0
12
pm
-0.2
1
pm
0.2
2
pm
0.9
3
pm
1.8
4
pm
2.7
5
pm
3.2
6
pm
3.1
7
pm
2.7
8
pm
2.1
9
pm
1.5
10
pm
1
11
pm
0.5


Tide / Current for Pollock Rip Channel, Massachusetts Current
   EDIT      HIDE   Help
Pollock Rip Channel
Click for Map
Tue -- 12:11 AM EDT     -0.00 knots Slack
Tue -- 02:57 AM EDT     -1.87 knots Max Ebb
Tue -- 05:07 AM EDT     Sunrise
Tue -- 06:03 AM EDT     0.00 knots Slack
Tue -- 08:46 AM EDT     Moonset
Tue -- 09:27 AM EDT     2.20 knots Max Flood
Tue -- 12:57 PM EDT     -0.00 knots Slack
Tue -- 03:34 PM EDT     -1.75 knots Max Ebb
Tue -- 06:42 PM EDT     0.00 knots Slack
Tue -- 08:18 PM EDT     Sunset
Tue -- 09:47 PM EDT     1.77 knots Max Flood
Tue -- 11:24 PM EDT     Moonrise
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
-0.8
2
am
-1.6
3
am
-1.9
4
am
-1.6
5
am
-1
6
am
-0.1
7
am
0.9
8
am
1.7
9
am
2.2
10
am
2.1
11
am
1.8
12
pm
1
1
pm
-0
2
pm
-1.1
3
pm
-1.7
4
pm
-1.7
5
pm
-1.3
6
pm
-0.6
7
pm
0.3
8
pm
1.1
9
pm
1.6
10
pm
1.8
11
pm
1.5


Weather Map
      HIDE   Help


GEOS Local Image of north east   
EDIT   HIDE



Boston, MA,




NOTICE: Some pages have affiliate links to Amazon. As an Amazon Associate, I earn from qualifying purchases. Please read website Cookie, Privacy, and Disclamers by clicking HERE. To contact me click HERE. For my YouTube page click HERE