Wednesday, August12, 2020
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Marine Weather and Tides
Warwick, 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 5:50AMSunset 7:50PM Wednesday August 12, 2020 8:21 PM EDT (00:21 UTC) Moonrise 12:00AMMoonset 2:30PM Illumination 34% Phase: Waning Crescent; Moon at 24 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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ANZ236 Narragansett Bay- 716 Pm Edt Wed Aug 12 2020
Tonight..SW winds 5 to 10 kt, becoming W after midnight. Waves around 2 ft. Patchy fog after midnight with vsby 1 to 3 nm.
Thu..N winds around 5 kt, becoming S in the afternoon. Waves around 2 ft.
Thu night..E winds around 5 kt. Waves 1 foot or less.
Fri..E winds around 5 kt, becoming se in the afternoon. Waves 1 foot or less.
Fri night through Sat night..NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft.
Sun..E winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to 3 ft.
Sun night and Mon..S winds 5 to 10 kt. Gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers.
Mon night..SW winds 5 to 10 kt. Waves 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 716 Pm Edt Wed Aug 12 2020
Synopsis for massachusetts and rhode island coastal waters.. A cold front will slide southeast into the coastal waters tonight. The front will linger around or south of the southern coastal waters through Thursday. High pressure over southeast canada dominates the weather this weekend into early 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 Warwick, RI
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location: 41.67, -71.35     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 122304 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 704 PM EDT Wed Aug 12 2020

SYNOPSIS. A few showers and isolated thunderstorms will persist into early this evening along a weak frontal boundary across south and central Rhode Island into southeast Massachusetts. It will remain quite warm Thursday and Friday, but less humid as this weak frontal boundary pushes south of New England. High pressure building across the Canadian Maritimes will result in mainly dry and cooler/seasonable this weekend. Low pressure may bring a period of showers Sunday night into Monday, then mainly dry and warm conditions Tuesday and Wednesday.

NEAR TERM /UNTIL 6 AM THURSDAY MORNING/. 7 PM update .

Isolated showers/t-storms which developed near the south coast along the weak frontal boundary are diminishing. MLCAPES still around 1000 J/kg but poor mid level lapse rates combined with cooling BL this evening will result in weakening instability. An isolated shower/t-storm remains possible early this evening along the south coast, otherwise dry conditions.

The weak front will slowly sag south along the south coast overnight. Drier air and lower dewpoints will gradually filter south across SNE tonight but higher dewpoints around 70 will persist along the immediate south coast. Some low clouds and patchy fog expected to develop and move back across the immediate south coast and Islands where S/SW flow persists south of the boundary.

SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/. 4 pm update .

Thursday:

Frontal boundary drifts a bit farther south, allowing post frontal airmass to bleed southward with dew pts falling into the upper 50s across northern MA, 60s for most of the remainder of the region except around 70 along the south coast. PWATs may also dip below 1 inch especially across northern MA. Thus given a drier column and the lack of any forcing for ascent, expecting mainly a dry day. The only exception will be along the south coast where maybe an isolated shower/T-storm forms along developing seabreeze. Otherwise dry weather prevails.

Not quite as hot or humid as today given post frontal airmass. Therefore not expecting any heat headlines. However highs will still manage to climb to 85-90 away from the shoreline as model soundings reveal a very deep mixed layer beyond 850 mb. Thus another day of 90 deg heat is possible, but again lower dew pt/humidity will preclude heat headlines.

Thu night .

Quite/dry weather and remaining warm with lows only in the mid to upper 60s. Patchy fog possible especially over southeast MA including Cape Cod and the islands.

LONG TERM /FRIDAY THROUGH WEDNESDAY/. Highlights .

* Mainly dry and warm Fri then cooler this weekend * A period of showers possible Sun night/Mon * Mainly dry and warm Tue/Wed

Details .

Friday .

Frontal boundary will be far enough south of New Eng to keep tropical moisture to the south. Mainly dry weather expected but models are indicating some instability in the west during the afternoon. This may lead to an isolated shower/t-storm in western MA/CT but overall looking at a dry day. Low level easterly flow in place but airmass still pretty warm with 925 mb temps 20-22C. Highs should reach mid/upper 80s, except cooler along the immediate coast. Dewpoints mainly in the 60s so a bit humid but not oppressive.

Saturday and Sunday .

High pres builds south from Maritimes into New Eng which will bring mainly dry and cooler conditions. Highs will range from the 70s near the coast to the 80s further inland, warmest in the CT valley. Humidity levels will be much more comfortable, especially interior as dewpoints fall into the 50s, but holding in the 60s near the coast.

Sunday night into Monday .

Lower confidence forecast as there is uncertainty with the northward extent of frontal boundary and low pres. GFS is further north and brings deeper moisture and tropical PWAT plume into SNE with periods of showers. ECMWF keeps high pres in control with the boundary further south and mainly dry weather. GFS has support from the GGEM, and many ECMWF ensemble members bring rainfall to SNE with 50-70% probs of QPF > 0.1". So we introduced chc pops for the Sun night/Mon period.

Tuesday and Wednesday .

Broad mid level trough sets up across the Gt Lakes with SW flow aloft across New Eng. Series of shortwaves rotating around the trough will remain north and west of the region so while a spot shower is possible, current thinking is for mainly dry weather. Ensemble mean 850 mb temps 13-15C which supports highs into the 80s. Moderate humidity levels anticipated.

AVIATION /00Z THURSDAY THROUGH MONDAY/. Forecaster Confidence Levels .

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

00Z TAF Update:

Tonight . High confidence.

Other than a spot shower/T-storm early this evening across southern RI and southeast MA, dry weather prevails. IFR/MVFR possible immediate south coast including Cape Cod/Islands. Otherwise VFR elsewhere. Light WNW except SSW along the south coast.

Thursday: High confidence.

Light NNE winds with local seabreezes. Any morning MVFR/IFR along the south coast improves to VFR. Otherwise VFR and mainly dry weather.

Thursday night: high confidence.

VFR, dry weather and light/variable winds likely.

KBOS Terminal . High confidence in TAF. Some uncertainty with winds but seabreeze unlikely but just remaining offshore. So SSW winds likely at the terminal this evening. An isolated shower/T-storm should remain south of the airspace.

KBDL Terminal . High confidence in TAF.

Outlook /Friday through Monday/ .

Friday: VFR. Slight chance SHRA, slight chance TSRA.

Friday Night through Saturday Night: VFR. Breezy.

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

Sunday Night: Mainly MVFR, with areas IFR possible. Breezy. Chance SHRA.

Monday: Mainly MVFR, with local IFR possible. Breezy. Chance SHRA, slight chance TSRA.

MARINE. This evening/overnight . isolated showers with embedded thunder across the southern MA/RI waters, then diminishing with sunset. Lightning and heavy rain the main concerns. Then dry later this evening and overnight. SSW winds diminishing with sunset across the southern waters, light and variable elsewhere. Low clouds and patchy fog likely return to the southern waters of MA/RI.

Thursday . low clouds and patchy fog may reduce vsby in the morning across RI and southern MA waters. Otherwise fairly quiet day with light/variable winds. Isolated shower/t-storm possible south coast in the afternoon.

Thursday night . any isolated evening shower/t-storm will dissipate with sunset. Otherwise patchy fog late with light NNE winds developing.

Outlook /Friday through Monday/ .

Friday through Friday Night: Winds less than 25 kt.

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

Saturday Night through Sunday: Winds less than 25 kt. Seas up to 5 ft.

Sunday Night through Monday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain showers.

BOX WATCHES/WARNINGS/ADVISORIES. CT . Heat Advisory until 8 PM EDT this evening for CTZ002>004. MA . Heat Advisory until 8 PM EDT this evening for MAZ005>007- 011>021. RI . Heat Advisory until 8 PM EDT this evening for RIZ001>004-006. MARINE . None.

SYNOPSIS . KJC/Nocera NEAR TERM . KJC SHORT TERM . Nocera LONG TERM . KJC AVIATION . KJC/Nocera MARINE . KJC/Nocera


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NAXR1 - Narragansett Bay Reserve, RI 2 mi97 min SW 4.1 81°F 1016 hPa75°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 2 mi52 min SW 4.1 G 7 80°F 1017 hPa
CPTR1 - 8452944 - Conimicut Light, RI 3 mi52 min 81°F 80°F1016.3 hPa
PRUR1 5 mi52 min 78°F 77°F
QPTR1 - 8454049 - Quonset Point, RI 7 mi52 min SSW 8.9 G 9.9 81°F 79°F1016.7 hPa
PVDR1 8 mi52 min SSW 5.1 G 6 86°F 1016.5 hPa73°F
FRXM3 9 mi52 min 82°F 74°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 10 mi52 min S 8 G 9.9 82°F 1016.5 hPa
FOXR1 - 8454000 - Providence, RI 10 mi52 min W 9.9 G 14 86°F 81°F1016.2 hPa
FRVM3 - 8447386 - Fall River, MA 10 mi52 min 83°F 81°F1016.9 hPa
NWPR1 - 8452660 - Newport, RI 12 mi52 min SSW 7 G 9.9 76°F 73°F1016.8 hPa
BUZM3 - Buzzards Bay, MA 25 mi82 min SSW 16 G 17 1017.4 hPa (+0.5)
BZBM3 - 8447930 - Woods Hole, MA 37 mi52 min 76°F 78°F1016.9 hPa
WAXM3 - Waquoit Bay Reserve, MA 44 mi97 min S 2.9 81°F 1017 hPa76°F
NLNC3 - 8461490 - New London, CT 45 mi52 min SSW 4.1 G 5.1 82°F 77°F1016.1 hPa

Wind History for Potter Cove, Prudence Island, RI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
N. Kingston / Quonset, RI6 mi32 minWSW 138.00 miMostly Cloudy82°F75°F79%1016.3 hPa
Providence, Theodore Francis Green State Airport, RI6 mi31 minSW 810.00 miMostly Cloudy83°F73°F74%1016.2 hPa
Newport, Newport State Airport, RI10 mi29 minSSW 65.00 miFog/Mist78°F73°F87%1016.4 hPa
Pawtucket, North Central State Airport, RI17 mi26 minNNW 310.00 miFair81°F69°F67%1011.2 hPa
New Bedford, New Bedford Regional Airport, MA20 mi29 minSW 610.00 miA Few Clouds80°F73°F82%1016.1 hPa
Taunton, Taunton Municipal Airport, MA23 mi30 minSW 310.00 miFair83°F73°F72%1015.8 hPa

Link to 5 minute data for KPVD

Wind History from PVD (wind in knots)
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Last 24hrSW8SW8S6S9S7S7SW8SW7SW8SW7SW4W6W86W3NW4S6S15S12
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1 day agoSW7SW5SW5SW5S6S6S5SW5S4S4S4S5S4SE6SE7S11SE14S12
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2 days agoSW9SW6SW8S6SW6S4SW5SW5SW3S33SW34W45S10S11S11S11SW15SW14SW16
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Tide / Current Tables for Bristol Highlands, Narragansett Bay, Rhode Island
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Bristol Highlands
Click for Map
Wed -- 02:43 AM EDT     3.32 feet High Tide
Wed -- 05:51 AM EDT     Sunrise
Wed -- 07:24 AM EDT     0.92 feet Low Tide
Wed -- 02:30 PM EDT     Moonset
Wed -- 03:18 PM EDT     4.01 feet High Tide
Wed -- 07:48 PM EDT     Sunset
Wed -- 08:22 PM EDT     1.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.93.23.32.92.21.4111.31.72.12.63.13.743.93.32.41.71.31.31.51.8

Tide / Current Tables for Westport River Entrance, Massachusetts Current
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Westport River Entrance
Click for Map
Wed -- 01:30 AM EDT     1.77 knots Max Flood
Wed -- 03:42 AM EDT     -0.00 knots Slack
Wed -- 05:50 AM EDT     Sunrise
Wed -- 06:02 AM EDT     -2.18 knots Max Ebb
Wed -- 09:57 AM EDT     0.00 knots Slack
Wed -- 01:54 PM EDT     1.68 knots Max Flood
Wed -- 02:29 PM EDT     Moonset
Wed -- 04:03 PM EDT     -0.00 knots Slack
Wed -- 06:28 PM EDT     -2.29 knots Max Ebb
Wed -- 07:47 PM EDT     Sunset
Wed -- 10:32 PM EDT     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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1.31.71.70.9-0.4-1.7-2.2-1.9-1.2-0.500.511.51.71.20.1-1.3-2.2-2.2-1.6-0.9-0.30.3

Weather Map
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wmap_A
GEOS Local Image of    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 (20,4,5,8)
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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.