Thursday, April2, 2020
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Marine Weather and Tides
Watch Hill, RI

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 6:26AMSunset 7:15PM Thursday April 2, 2020 4:11 PM EDT (20:11 UTC) Moonrise 12:43PMMoonset 3:14AM Illumination 73% Phase: Waxing Gibbous; Moon at 10 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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ANZ237 Block Island Sound- 116 Pm Edt Thu Apr 2 2020
.gale warning in effect from late tonight through late Friday night...
This afternoon..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. A chance of rain.
Tonight..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Areas of fog. Rain likely.
Fri..N winds 20 to 25 kt with gusts up to 40 kt. Seas 4 to 7 ft. Areas of fog. Rain likely. Vsby 1 nm or less.
Fri night..NE winds 20 to 25 kt with gusts up to 40 kt, diminishing to 15 to 20 kt with gusts up to 30 kt after midnight. Seas 5 to 8 ft. A chance of rain.
Sat..NE winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 7 ft.
Sat night..NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft.
Sun..SE winds 5 to 10 kt. Seas 2 to 4 ft.
Sun night..SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
Mon..W winds 5 to 10 kt. Seas 2 to 3 ft.
Mon night..W winds 5 to 10 kt. Seas 2 to 3 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 116 Pm Edt Thu Apr 2 2020
Synopsis for massachusetts and rhode island coastal waters.. A large and intense ocean storm well east of the waters will gradually pinwheel back toward the coast through tonight before moving S the waters Fri into Fri night. This storm will bring gale to storm force winds to the waters tonight and 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 Watch Hill, RI
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location: 41.31, -71.86     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 021945 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 345 PM EDT Thu Apr 2 2020

SYNOPSIS. A large and intense ocean storm moves west toward Southern New England tonight, then pinwheels toward the south on Friday. This storm will bring strong to possibly damaging winds and coastal flooding to east coastal Massachusetts, especially Cape Cod and the Islands. In addition, periods of rain will fall heavily at times across the area through Friday night. A slow moving, weak front will bring scattered showers late Saturday night through Sunday night. Unsettled conditions will linger at times into mid week.

NEAR TERM /THROUGH TONIGHT/.

Closed low well south of Yarmouth Nova Scotia is vertically stacked through the upper atmosphere. That means it isn't going anywhere soon. Instead it will drift west with the upper low during the night. Strong low level jet and a favorable left exit region of the upper jet will combine with the marine flow to generate bands of rain than move across the Gulf of Maine and onshore into Eastern MA.

The airmass over Southern New England was still relatively dry during the mid afternoon, with dew point depressions of 9F at Boston, 17F at PVD, and 22F at BDL. This dry air evaporates the incoming precipitation leaving a very light rain at most. Expect the rain to eat away at the dry air and eventually win out. That will bring an increasing chance of measureable rain during the night . soonest in Eastern MA and latest in the CT Valley and Berkshire East Slopes.

Winds to be discussed in the short term section will increase during the night with sustained winds 15-25 kt. Gusts will be 25-35 kt inland while the Cape/Islands/North Shore/South Shore will increase to 40-45 kt.

SHORT TERM /FRIDAY THROUGH FRIDAY NIGHT/.

Large ocean storm retrogrades back to the west making its closest approach to Southern New England Friday morning. The storm passes just SE of the 40N/70W benchmark before continuing to move southward during Friday.

Temperatures at 950 mb suggest daytime temps in the 40s most places, possibly around 50 or low 50s in the CT Valley.

Winds: A stiff pressure gradient north of the low will turn winds over Southern New England from the northeast with increasing speeds overnight, especially across Eastern MA. Low level northeast winds reach 50-60 kt as they approach the Eastern MA coast. Model soundings for BOS and Plymouth show mixing to just below the 50 kt layer while mixing at HYA reaches into this layer Friday. Because of this expect High Wind criteria for gusts to 60 mph on Cape Cod and Islands later tonight into Friday night. Wind Advisory criteria for gusts to 50 mph expected along the MA East Coast.

The pressure gradient weakens late Friday and Friday night, and the low level jet weakens and moves off to the south. As that happens, expect the winds over Srn New England should diminish.

Rain: Bands of rain will continue to move from east to west from the Gulf of Maine to over land. Precipitable water values will be between 0.75 and 1.0 inches. This isn't exceptional, but it is above average for early April. The upper jet around the stalled upper low will also be flowing toward the west, placing the left exit region over Southern New England. Convergence ahead of the low level jet and lift generated by the left exit region upstairs should generate appreciable lift. The lift and available moisture suggest rainfall of 1 to 1.5 inches near the coast and less than 0.5 inches in the CT Valley.

Rain and wind diminish later Friday night as the support moves off.

See coastal flooding section below for a discussion of coastal flood potential.

LONG TERM /SATURDAY THROUGH THURSDAY/. Highlights .

* Area of rain will linger across central and eastern areas Friday night, along with strong wind gusts, then will gradually shift offshore during Saturday

* Mainly dry conditions late Saturday into Sunday morning as weak high pressure crosses

* A weak disturbance and approaching cold front may bring scattered showers Sunday afternoon into Sunday night

* Dry, seasonable conditions briefly return Monday

* Unsettled conditions will linger at times Monday night through mid week as weak systems move across

Details .

Saturday .

The 00Z models continue to show rather wide solution spread into Saturday, with some keeping the western edge of the precip lingering across eastern areas early. However, some members are trying to wrap some drier air around this fringe, including the GGEM and ECMWF. Noting some weak ridging trying to shift S out of northern New England, which could help with some subsidence and drying air to push the precip to the S and SE during Saturday. At this point, have patchy showers lingering Sat morning across E Mass into RI, but should taper off by midday. Clouds will linger into the afternoon, but may see some partial clearing well inland late in the day.

Temps on Saturday will remain chilly along the coast with highs only in the lower 40s, but could see readings reach the lower- mid 50s well across central and western areas, mildest across the CT valley.

Saturday night into Sunday .

As the ocean storm moves further offshore, will see high pressure ridge build slowly E Sat night. However, some model members try to bring another weak disturbance across the interior during the night, which may bring a few showers. As the northern stream mid level steering flow becomes nearly zonal late this weekend, another cold front will push toward the region with another round of showers.

With a generally light W-NW surface wind flow in place, could see temps begin to slowly moderate. Highs on Sunday should rise through the 50s, but will remain cooler across Cape Ann and Cape Cod. Readings could reach the upper 50s across the lower CT valley before the showers arrive later in the day.

Monday through Wednesday .

With the fast moving H5 steering flow in place, will see weather systems move across the lower 48 rather quickly. Still noting quite a bit of model solution spread, so will see a quite a bit of spread with the timing and track of individual systems.

Overall, should see dry conditions and mild temperatures on Monday as weak high pressure moves across. Highs will run up to 5 to 10 degrees above normal for early April, with readings topping off from the lower-mid 50s across the Cape and islands as well as the higher inland terrain to the lower-mid 60s across the mid and lower CT valley as well as interior E Mass into RI and NE CT.

Next system approaches Monday night into Tuesday morning, but appears best shot for showers may occur mainly south of the Mass Pike. Rather disorganized systems move along in the nearly zonal steering flow out of the Great Lakes and Ohio valley. Strong low pressure will push across central Ontario into Quebec, with a trailing front that could bring another around of precip by late Tuesday night that may linger into Wednesday.

AVIATION /19Z THURSDAY THROUGH TUESDAY/. Forecaster Confidence Levels .

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

Tonight . Moderate confidence.

IFR cigs on the Cape and Islands and MVFR cigs along the MA North and South Shores are the first signs of the trends for tonight. Expect these lowering conditions to trend west across Southern New England during the night as the low level dry air moistens. Expect Western areas to lower to MVFR, while areas in and east of the Central Hills will lower to IFR in rain and fog.

North winds gusting 25 to 30 kt will turn from the northeast along the coast with gusts increaing to 40-45 kt by morning.

Friday . Moderate confidence.

MVFR/IFR conditions in periods of rain. NE gusts 40-50 kt Cape/Islands and 35-45 kt east coastal MA into SE MA and coastal RI. Periods of 1-3 mile vsbys in rain and fog.

Friday night . Moderate confidence.

MVFR west and IFR east. Rain and wind diminish overnight. Northeast winds along the coast will initially gust 35-45 kt, diminishing to 20-30 kt by morning.

KBOS Terminal . Moderate confidence. VFR early, lowering to MVFR this evening and IFR overnight. Rain and northeast winds gusting to 35 kt.

KBDL Terminal . High confidence in trends, but lower confidence on exact timing. VFR trending to MVFR CIGS early tonight.

Outlook /Saturday through Tuesday/ .

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

Saturday Night: Mainly VFR, with local IFR possible. Breezy.

Sunday: Mainly VFR, with local IFR possible. Slight chance SHRA.

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

Monday: VFR.

MARINE.

Large ocean storm south of Nova Scotia backs up to the west. This brings strong winds and rough seas, especially to the eastern MA waters. Storm force gusts to 50 kt are expected over eastern waters with gusts to 40 kt over the remaining waters. Peak of the wind will be Friday morning as the storm makes its closest approach to the waters, then turns toward the south. Storm warnings and gale warnings are in place. Seas will build to 20-25 ft east of Cape Cod and Nantucket. Vsbys reduced in period of rain and fog.

Northeast winds gust to gale force Friday night, but show a diminishing trend through the night. Rough seas continue, but these will as show a subsiding trend through the night.

Outlook /Saturday through Tuesday/ .

Saturday: Low risk for Small Craft Advisory winds with gusts up to 30 kt. Rough seas up to 16 ft. Slight chance of rain showers.

Saturday Night: Winds less than 25 kt. Rough seas up to 13 ft.

Sunday: Winds less than 25 kt. Rough seas up to 9 ft.

Sunday Night: Winds less than 25 kt. Areas of rough seas. Chance of rain showers.

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

TIDES/COASTAL FLOODING. This afternoon and evening . Seas subsiding after cresting near 5 feet at Nantucket during the morning. Reports of minor splashover.

Expect rising seas this evening with the secondary high tide. Total water levels are expected similar or a little lower than this morning. This suggests some more minor splashover possible at Nantucket, while the remainder of the coast remains free of these effects.

Friday . The main concern is the Friday morning high tide for all of east coastal MA as the core of strong winds and seas will occur around this time. A storm surge up to 3 ft is expected per Stevens Institute surge ensembles. In addition greater wave action expected as well with 20+ ft seas ocean waters east of Nantucket and Cape Cod and up to 15 ft around Boston Buoy. These dangerous seas will be long period/high energy waves. Based on forecast storm tide and wave action, widespread minor flooding expected along the entire east coast of MA, with risk for moderate flooding at Nantucket. As a result we issued a coastal flood warning for Nantucket with an advisory elsewhere along east coastal MA.

Tides are about a little less than a foot lower for the Fri evening high tide and surge and seas will also be a bit lower. As a result not expecting much flooding for the Fri evening high tide, except pockets of minor flooding are possible for Nantucket.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . Coastal Flood Advisory from 6 AM to 10 AM EDT Friday for MAZ007-015-016-019-022-023. Wind Advisory from 5 AM to 11 PM EDT Friday for MAZ007-019-021. High Wind Warning from 5 AM to 8 PM EDT Friday for MAZ022>024. Coastal Flood Warning from 6 AM to 10 AM EDT Friday for MAZ024. RI . None. MARINE . Storm Warning from 5 AM to 8 PM EDT Friday for ANZ231-232-250- 254-255. Gale Warning from 2 AM Friday to 6 AM EDT Saturday for ANZ233>235-237. Gale Warning from 5 AM to 8 PM EDT Friday for ANZ230-236. Gale Warning from 11 PM this evening to 6 AM EDT Saturday for ANZ251. Gale Warning from 11 PM this evening to 9 AM EDT Saturday for ANZ256.

SYNOPSIS . WTB/EVT NEAR TERM . WTB/EVT SHORT TERM . WTB LONG TERM . EVT AVIATION . WTB/EVT MARINE . WTB/EVT TIDES/COASTAL FLOODING .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 12 mi316 min NNW 21 G 26 48°F 998.9 hPa32°F
NLNC3 - 8461490 - New London, CT 13 mi323 min NNW 14 G 18 47°F 45°F1001.3 hPa
MTKN6 - 8510560 - Montauk, NY 19 mi323 min 43°F 44°F1001.8 hPa
NWPR1 - 8452660 - Newport, RI 31 mi323 min NNW 14 G 20 47°F 39°F999.9 hPa
QPTR1 - 8454049 - Quonset Point, RI 31 mi323 min NW 15 G 21 47°F 45°F1000.2 hPa
NAXR1 - Narragansett Bay Reserve, RI 36 mi386 min N 8.9 46°F 1001 hPa33°F
PRUR1 36 mi323 min 49°F 35°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 36 mi323 min N 8 G 17 48°F 1000.6 hPa
CPTR1 - 8452944 - Conimicut Light, RI 39 mi323 min Calm G 0 45°F 45°F1000 hPa
PVDR1 41 mi323 min NNW 16 G 22 49°F 1000.6 hPa35°F
FOXR1 - 8454000 - Providence, RI 42 mi329 min NNE 18 G 26 47°F 42°F1000.5 hPa
BUZM3 - Buzzards Bay, MA 44 mi311 min NW 22 G 24 1000.1 hPa (-1.9)
44097 - Block Island, RI (154) 45 mi311 min 43°F5 ft
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 45 mi323 min NNW 19 G 23 47°F 999.8 hPa
FRXM3 45 mi323 min 46°F 36°F
FRVM3 - 8447386 - Fall River, MA 46 mi323 min 47°F 44°F1000.1 hPa

Wind History for New London, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Westerly, Westerly State Airport, RI4 mi18 minNNW 15 G 2210.00 miOvercast57°F33°F41%998.3 hPa
Groton / New London, Groton / New London Airport, CT10 mi15 minNNW 23 G 3210.00 miOvercast and Windy54°F33°F45%998.1 hPa
Montauk, Montauk Airport, NY16 mi17 minNNW 11 G 19 mi52°F37°F57%998.8 hPa
Block Island State Airport, RI17 mi15 minNNW 14 G 1810.00 miOvercast51°F36°F56%998.2 hPa

Link to 5 minute data for KWST

Wind History from WST (wind in knots)
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1 day agoSE9SE9SE8E7E6NE4CalmNE3NE3NE3CalmN4N4N4N6N4NE9
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2 days agoN8NE76NE6N7
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Tide / Current Tables for Watch Hill Point, Rhode Island
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Watch Hill Point
Click for Map
Thu -- 03:13 AM EDT     Moonset
Thu -- 03:57 AM EDT     2.36 feet High Tide
Thu -- 06:28 AM EDT     Sunrise
Thu -- 10:06 AM EDT     0.38 feet Low Tide
Thu -- 12:43 PM EDT     Moonrise
Thu -- 04:33 PM EDT     2.09 feet High Tide
Thu -- 07:14 PM EDT     Sunset
Thu -- 10:17 PM EDT     0.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.41.82.22.42.21.71.20.70.50.40.40.60.91.31.722.11.81.30.80.50.30.4

Tide / Current Tables for The Race, Long Island Sound, New York Current
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The Race
Click for Map
Thu -- 12:38 AM EDT     0.00 knots Slack
Thu -- 03:14 AM EDT     Moonset
Thu -- 03:37 AM EDT     2.12 knots Max Flood
Thu -- 06:28 AM EDT     Sunrise
Thu -- 06:52 AM EDT     -0.00 knots Slack
Thu -- 10:12 AM EDT     -2.59 knots Max Ebb
Thu -- 12:44 PM EDT     Moonrise
Thu -- 01:32 PM EDT     0.00 knots Slack
Thu -- 04:19 PM EDT     2.12 knots Max Flood
Thu -- 07:15 PM EDT     Sunset
Thu -- 07:40 PM EDT     -0.00 knots Slack
Thu -- 10:42 PM EDT     -2.32 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.60.31.322.11.60.8-0.1-1.2-2.1-2.6-2.4-1.6-0.60.51.52.121.40.6-0.3-1.4-2.1-2.3

Weather Map
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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 (16,3,4,5)
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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.