Tuesday, September28, 2021
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Marine Weather and Tides
Newport, RI

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:38AMSunset 6:33PM Tuesday September 28, 2021 12:49 PM EDT (16:49 UTC) Moonrise 11:01PMMoonset 2:05PM Illumination 52% Phase: Third Quarter Moon; Moon at 22 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- 1027 Am Edt Tue Sep 28 2021
This afternoon..SW winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers with a slight chance of tstms, then showers likely with a chance of tstms. Some tstms may produce gusty winds and small hail.
Tonight..N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Waves around 2 ft. Showers likely with a chance of tstms. Some tstms may produce gusty winds and small hail.
Wed..N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Waves around 2 ft.
Wed night..N winds 5 to 10 kt. Waves 1 foot or less.
Thu and Thu night..NW winds 5 to 10 kt. Waves 1 foot or less.
Fri through Sat night..NW winds 5 to 10 kt. Waves 1 foot or less, except 2 to 4 ft at the bay entrance. 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 1027 Am Edt Tue Sep 28 2021
Synopsis for massachusetts and rhode island coastal waters.. A cold front will produce gusty winds for the waters off of southern new england through this afternoon. Unsettled weather with a chance of showers will persist for much of the week. High pressure arrives with dry weather for the coming weekend. For additional information on possible hazardous weather for the week ahead, please visit www.weather.gov/boston/ehwo


7 Day Forecast for Marine Location Near Newport city, RI
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location: 41.47, -71.38     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 281355 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 955 AM EDT Tue Sep 28 2021

SYNOPSIS.

Scattered showers with embedded thunderstorms will continue today, especially this afternoon/evening across CT, RI and southeast MA as the cold front sweeps across the region. It turns unseasonably chilly Thursday into overnight Thursday along with the chance for a few showers. Temperatures moderate to near normal heading into the weekend with mostly dry conditions. Distant Hurricane Sam could lead to increased rip current risk on beaches this weekend.

NEAR TERM /UNTIL 6 PM THIS EVENING/.

955 AM Update .

* Scattered showers and thunderstorms through the afternoon

* A few strong to marginally severe thunderstorm possible especially south of the MA Turnpike this afternoon

A busy morning with scattered showers and thunderstorms across the region. This activity was being drive by warm advection aloft coupled with steep mid level lapse rates and modest effective bulk shear. A particular cluster of thunderstorms near the MA/RI border has been strong to marginally severe. The initial concern is for hail with this activity given steep mid level lapse rates and modest effective shear.

The main concern this afternoon and early evening will be near and south of the MA Turnpike . particularly towards the south coast. Surface instability of 750 to 1500 J/KG should combined with 40+ knots of effective shear, steep mid level lapse rates and the approaching cold front to trigger more showers and thunderstorms. Give the strong effective shear and 500T near -15C, a few strong to marginally severe thunderstorms are certainly possible with locally strong wind gusts and hail. Brief heavy rainfall is expected too.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/. Overview .

Surface cold front shifts offshore tonight and Wednesday. Surface flow shifts from the northwest and north, bringing drier air and more shallow moisture. Upper closed low over Quebec tonight moves south over New England on Wednesday, bringing a upper cold pool and airmass destabilization on Wednesday.

Details .

Tonight .

Lingering showers/thunder early tonight, but then a trend to airmass stabilization as the cold front moves offshore. Expect evening showers and thunder, especially along the south coast. This moves south of the Islands after midnight. Clouds will linger over the Cape and Islands, but a clearing trend from the north and west. North winds bring lowering dew points, with values falling into the 40s most areas while dew points on the Cape and Islands remain in the low to mid 50s. Expect min temps in the 40s inland, and in the 50s coastal plain.

Wednesday .

Cooler airmass moves in for Wednesday, with the closed upper low and cold pool moving south into the region. Cross sections show dry conditions in the morning, but then increasing moisture between 700- mb and 850-mb in the afternoon. This moisture and the destabilization from the upper cold pool should lead to increased clouds in the afternoon/evening. Will keep the forecast dry, but with skies becoming partly cloudy. Mixing reaches to 800-mb, with temps at that level supporting highs in the 60s.

LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/. Highlights .

* Thursday will be the coldest day of the season so far with highs only in the low 60s, with mid 50s high terrain. Overnight lows drop into the upper 30s to mid 40s away from urban centers and immediate coast. * Aside from a few showers Wednesday night into Thursday, mostly dry conditions prevail through the weekend and possibly into Monday with temperatures moderating to near normal. * Distant Hurricane Sam could lead to increased rip risk for beaches this weekend.

Details .

500mb height fields suggest a somewhat unsettled weather pattern given cyclonic flow and a digging trough that would eventually culminate in a -24C H5 cold pool right over Southern New England on Thursday. While no washouts are expected given the overall lack of deep moisture, the disorganized shortwave energy rounding the trough will result in pesky showers at times for the high terrain due to orographic lift and a mix of sun and clouds elsewhere along with gusty northwest winds at times, particularly on Thursday and Friday. Expect high temperatures to be 5 to 10 degrees below normal on Thursday, trending to slightly below to near normal from Friday onwards heading into the weekend. For reference, average daytime highs and overnight lows for the first week of October are in the mid to upper 60s and mid 40s to low 50s respectively.

Day to day wise, guidance has come into better agreement that 540 Dm drops south into Northern MA and Southern NH along with 850mb temperatures at 0C. With 925mb temps only getting into the mid single digits, daytime highs will struggle to get much above low 60s. In fact, the high terrain including the Worcester Hills and the Berkshire East Slopes might only top out in the mid 50s.

Looks like Thursday into Thursday night will easily be our coldest stretch of the season so far. GFS and EC have come into better agreement of 540 Dm upper low diving south into Southern NH and Northern MA. With 850mb temps around 0C and 925mb temps around +5C, daytime highs will struggle to get above 60F under a mix of sun and clouds with mid 50s highs for the high terrain across our CWA. In addition, -22 to -24C H5 cold pool moving overhead overnight Wednesday into Thursday will lead to instability showers especially across eastern MA and plenty of clouds elsewhere. Then as the sun sets, with high pressure building in Thursday night, the 925-700mb column dries out and with surface winds diminishing, conditions look decent for radiational cooling. As such, overnight lows should fall into the upper 30s to mid 40s away from the urban heat islands and immediate coastal areas. NBM temperatures for this time period look a tad warm given the synoptics, so we blended in the GFS and MAV guidance to better reflect the synoptics.

By Friday, the upper low pulls away into Newfoundland and with 925mb temperatures moderating to +8 to +10C, daytime highs should reach the low to mid 60s on Friday with more sunshine. Then heading towards the weekend, as the closed upper low pulls away from New England, expecting mostly dry conditions over the weekend and possibly into Monday with dry northwest flow aloft. A source of uncertainty with the weekend forecast lies in the evolution of the upper level pattern downstream in the North Atlantic. While the EC moves the closed low along, the GFS has the low retrograding and meandering across northern Maine into New Brunswick. If the GFS is right, the weekend outlook could turn out to be less rosy than what is currently forecast. In addition, distant Hurricane Sam will churn up swells and lead to increased rip risks for the east-facing beaches this weekend. Nonetheless, given we are still 4 to 5 days out, forecast confidence is low and have chosen to stick to the NBM for Friday into Monday.

AVIATION /14Z TUESDAY THROUGH SATURDAY/. Forecaster Confidence Levels.

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

Today . Moderate Confidence. Showers and thunderstorms will continue to impact the region through the afternoon. This activity should begin to focus near and especially south of the MA Turnpike this afternoon and early evening. While VFR conditions will dominate outside this activity, brief MVFR/IFR with even localized LIFR conditions are expected with the strongest thunderstorms. Gusty winds and small hail are the main concerns.

Tonight . As the cold front moves offshore and winds turn from the northwest and north, expect drier air and a trend to clearing skies. Some lower clouds could linger overnight along the Cape and Islands. Modest Northerly winds 15 to 20 kt.

Wednesday . VFR. Clouds developing by afternoon with bases around 5000 feet.

KBOS Terminal . High confidence.

KBDL Terminal . High confidence.

Outlook /Wednesday Night through Saturday/ .

Wednesday Night through Thursday: Mainly VFR, with areas MVFR possible. Slight chance SHRA.

Thursday Night through Saturday: VFR.

MARINE. Forecaster Confidence Levels.

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

Today . High confidence.

Southwest wind 15 to 20 kt with higher gusts this morning. Seas around 5 feet on the southern and southeast waters, but diminishing. A cold front in Northern New England moves southeast across the MA and RI waters. A few strong thunderstorms are possible, especially along the South Coast and south of the Islands. Will convert Gales to Small Craft Advisory for today.

Tonight . High confidence.

Scattered showers and thunderstorms in the early night. These move offshore during the night with winds shifting from the northwest and north. Lingering Small Crafts on the southern outer waters.

Wednesday . High confidence. Lingering Small Crafts on the southern and southeast outer waters due to 5 foot seas. Winds less than 25 kt.

Outlook /Wednesday Night through Saturday/ .

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

Thursday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain showers.

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

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

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . Small Craft Advisory until noon EDT today for ANZ232>235-237. Small Craft Advisory until 10 AM EDT this morning for ANZ231- 250-251. Small Craft Advisory until midnight EDT tonight for ANZ254>256.

SYNOPSIS . WTB/Chai NEAR TERM . Frank SHORT TERM . WTB LONG TERM . Chai AVIATION . Frank/WTB/Chai MARINE . WTB/Chai


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWPR1 - 8452660 - Newport, RI 4 mi49 min SW 5.1 G 6 74°F 70°F1009 hPa (+0.0)
QPTR1 - 8454049 - Quonset Point, RI 8 mi49 min W 5.1 G 6 71°F 70°F1009.2 hPa (+0.0)
PRUR1 10 mi49 min 71°F 66°F
NAXR1 - Narragansett Bay Reserve, RI 12 mi64 min W 1.9 71°F 1010 hPa65°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 12 mi49 min W 1.9 G 4.1 69°F 1009.8 hPa (+0.0)
CPTR1 - 8452944 - Conimicut Light, RI 17 mi49 min 70°F 70°F1008.9 hPa (+0.0)
BUZM3 - Buzzards Bay, MA 19 mi49 min SW 15 G 16 1010.3 hPa (+0.0)
FRXM3 19 mi49 min 70°F 70°F
FRVM3 - 8447386 - Fall River, MA 20 mi49 min 71°F 71°F1009 hPa (-0.4)
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 20 mi49 min SSE 4.1 G 5.1 71°F 1009 hPa (+0.0)
PVDR1 22 mi49 min NNW 4.1 G 6 72°F 1009.5 hPa (+0.5)
FOXR1 - 8454000 - Providence, RI 23 mi49 min N 4.1 G 11 70°F 68°F1009.4 hPa (+0.5)
44097 - Block Island, RI (154) 37 mi23 min 69°F6 ft
BZBM3 - 8447930 - Woods Hole, MA 38 mi49 min 71°F 71°F1009.8 hPa (+0.4)
NLNC3 - 8461490 - New London, CT 38 mi49 min 74°F 70°F1009.9 hPa (+0.0)
LDLC3 - New London Ledge CT - Ledge Light Weather 39 mi39 min W 16 G 19 71°F 1009 hPa41°F
MTKN6 - 8510560 - Montauk, NY 42 mi49 min 73°F 71°F1009.4 hPa (+0.0)
WAXM3 - Waquoit Bay Reserve, MA 46 mi64 min S 4.1 76°F 1009 hPa71°F

Wind History for Newport, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Newport, Newport State Airport, RI7 mi56 minVar 310.00 miThunderstorm in Vicinity75°F63°F66%1008.8 hPa
N. Kingston / Quonset, RI10 mi2 hrsW 1210.00 miMostly Cloudy0°F0°F%1009.5 hPa
Providence, Theodore Francis Green State Airport, RI18 mi58 minVar 410.00 miThunderstorm72°F61°F68%1009 hPa
Block Island State Airport, RI23 mi53 minno data10.00 miPartly Cloudy74°F65°F74%0 hPa
Westerly, Westerly State Airport, RI24 mi56 minW 710.00 miMostly Cloudy71°F63°F76%1009.2 hPa

Link to 5 minute data for KUUU

Wind History from UUU (wind in knots)
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NW7W4CalmCalmCalm54Calm3CalmNW5CalmCalmCalm453
2 days agoNE53S4SE3CalmCalmE5CalmCalmNE3E4CalmNW4NW6NW6NW5NW8NW8W4NW7NW9NW10NW10NW12

Tide / Current Tables for Castle Hill, Narragansett Bay, Rhode Island
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Castle Hill
Click for Map
Tue -- 01:13 AM EDT     2.53 feet High Tide
Tue -- 06:20 AM EDT     0.74 feet Low Tide
Tue -- 06:39 AM EDT     Sunrise
Tue -- 01:44 PM EDT     3.01 feet High Tide
Tue -- 02:05 PM EDT     Moonset
Tue -- 06:31 PM EDT     Sunset
Tue -- 07:14 PM EDT     0.98 feet Low Tide
Tue -- 09:58 PM EDT     Last Quarter
Tue -- 11:00 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.32.52.42.11.510.80.81.11.51.82.22.62.932.82.21.61.2111.21.41.6

Tide / Current Tables for Westport River Entrance, Massachusetts Current
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Westport River Entrance
Click for Map
Tue -- 12:16 AM EDT     1.79 knots Max Flood
Tue -- 02:31 AM EDT     -0.00 knots Slack
Tue -- 04:51 AM EDT     -2.10 knots Max Ebb
Tue -- 06:38 AM EDT     Sunrise
Tue -- 08:57 AM EDT     0.00 knots Slack
Tue -- 12:44 PM EDT     1.49 knots Max Flood
Tue -- 02:04 PM EDT     Moonset
Tue -- 02:47 PM EDT     -0.00 knots Slack
Tue -- 05:13 PM EDT     -2.18 knots Max Ebb
Tue -- 06:30 PM EDT     Sunset
Tue -- 09:09 PM EDT     0.00 knots Slack
Tue -- 09:58 PM EDT     Last Quarter
Tue -- 10:59 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.60.7-0.7-1.8-2.1-1.7-1.1-0.500.50.91.41.50.9-0.3-1.5-2.2-2-1.3-0.7-0.10.40.9

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