Friday, May24, 2019 L-36.com


Marine Weather and Tides
Westerly, RI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 5:19AMSunset 8:09PM Friday May 24, 2019 9:11 AM EDT (13:11 UTC) Moonrise 12:31AMMoonset 10:19AM Illumination 70% Phase: Waning Gibbous; Moon at 20 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- 858 Am Edt Fri May 24 2019
.small craft advisory in effect from 1 pm edt this afternoon through this evening...
This afternoon..NW winds 15 to 20 kt with gusts up to 30 kt. Seas around 4 ft.
Tonight..NE winds 10 to 15 kt with gusts up to 30 kt, becoming N 5 to 10 kt after midnight. Seas 2 to 3 ft.
Sat..W winds 5 to 10 kt, becoming sw 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft.
Sat night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers in the evening, then showers likely after midnight.
Sun..SW winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 3 to 4 ft. A chance of showers in the morning.
Sun night..W winds 5 to 10 kt. Seas around 3 ft.
Mon..N winds 5 to 10 kt, becoming se in the afternoon. Seas 2 to 3 ft.
Mon night..S winds 5 to 10 kt. Seas around 2 ft.
Tue..SE winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas around 3 ft. A chance of showers in the afternoon.
Tue night..S winds 10 to 15 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 858 Am Edt Fri May 24 2019
Synopsis for massachusetts and rhode island coastal waters.. A cold front will push offshore early today, followed by gusty north to northwest winds. Wind gusts along the cape as well as nantucket may gust between 40mph and 50mph this afternoon. High pres builds across new england tonight, then across the waters Sat. Another cold front moves across the waters Sat night, with another weak system moving across late Sunday. High pres builds across on Mon, with another system approaching Tue. 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 Westerly, RI
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location: 41.38, -71.83     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 241131
afdbox
area forecast discussion
national weather service boston norton ma
731 am edt Fri may 24 2019

Synopsis
Windy and seasonable conditions today. Much of Saturday looks dry
with pleasant temperatures, but a fast moving disturbance will
probably bring a period of showers late Saturday into early Sunday.

The rest of Sunday into memorial day looks to be warm and mainly
dry. Showers and cool temperatures return Tuesday as a warm front
approaches from the south. Unsettled weather pattern lingers into
Thursday, but not a washout.

Near term until 6 pm this evening
715 am update...

skies were mainly clear across most of the region at 11z as seen
on goes-east visible satellite imagery. Noting some wave clouds
working across central and western areas on the northern winds
in place. Only precip noted on regional radar extended from
central nh into southern me, rotating around the base of low
pressure crossing southern quebec into N nh NW me.

Near term forecast pretty much on track. Have updated to bring
conditions current.

Previous discussion...

low pressure moves off the maine coast by around midday. This
low will strengthen across the gulf of maine, causing the
pressure gradient to increase as well. Low level lapse rates
steepen during the day from h85 through h95 as low level 35-40
kt jet moves across from late morning through the afternoon.

Will see a portion of this mix down, with gusts up to 25-30 kt
across most areas into this afternoon.

The gusty n-nw winds will veer to n-ne during the afternoon as
the low pushes further offshore. Also noting another stronger
jet wrapping around the exiting low across mass bay, which will
bring some stronger winds across the eastern waters as well as
cape cod and the islands during the afternoon. So, could see
gusts up to 30-35 kt along E coastal areas in those areas, but
should remain below wind advisory criteria.

Some of the high res models were signaling some leftover low
level moisture that could try to work in during the midday and
afternoon hours on the onshore winds. However, with increasing
subsidence in place, have a dry forecast going for today. Expect
temps to reach the upper 60s to lower 70s across most areas,
except a bit cooler along the immediate E coast.

Short term 6 pm this evening through 6 pm Saturday
Tonight...

center of the stronger winds crosses the CAPE and islands this
evening, so the gusty northerly winds will continue through
around midnight before diminishing as the core shifts s.

Otherwise, high pressure will build across the region through
the night, allowing winds to diminish.

With the lighter winds and mostly clear skies, expect temps to
fall back to the mid 40s to lower 50s, running close to or a
bit below seasonal levels.

Saturday...

with the fast mid level steering flow in place across the
northern tier, will see the low across new england push steadily
e. Winds shift around to light s-sw by midday, then will
increase to around 10-15 kt with some gusts up to around 20 kt
along the immediate S coast.

The question is timing the approach of the next system in the
fast steering flow. Clouds will increase from late morning
through the afternoon, though may hold off along the S coast
until evening. Leading edge of the precip looks to push into n
central and NW mass during the mid and late afternoon, so most
areas should remain dry.

Expect highs to run from the 60s across CAPE cod and the islands
to the lower-mid 70s elsewhere.

Long term Saturday night through Thursday
Highlights...

* period of showers Sat night, lingering into early sun
cape islands
* warm and mainly dry Sun Mon with 80s Sun away from south
coast
* cool and potentially wet tue
* showery pattern may persist into Thu but not a washout
overview...

overall pattern features sne on northern periphery of strong se
conus subtropical ridge. As such, we will be vulnerable to
shortwaves and fronts moving through the region with periods of
showers from time to time, but warm and dry periods as well. Temps
in the extended period will be changeable and dependent on where
boundaries set up. Forecast confidence diminishes by Wed Thu due to
uncertainty with location of shortwaves moving over the ridge and
placement of boundaries. The ridge will get pushed to the east by
thu as trough approaches from the lakes.

Saturday night into Sunday...

fast moving shortwave approaches Sat night and guidance is
indicating an instability burst developing at the nose of a low
level jet as low level theta-e ridge moves into the region. This
will lead to some showers moving into sne and can't rule out a few t-
storms as marginal instability develops aloft. The showers may
linger into early Sun on the CAPE islands, otherwise drying Sun with
westerly flow. Should see a fair amount of sunshine developing after
some early morning clouds, with warm temps. 925 mb temps around 20c
support highs in the low to mid 80s, except 70s along the south
coast. A weak cold front move into the region in the afternoon and
can't rule out an isolated t-storm as marginal instability develops
in the afternoon.

Monday...

front is offshore with high pres building to the north leading to a
mostly sunny day. Cooler temps aloft Mon but still a warm day with
highs in the 70s and possibly 80 ct valley. Sea-breezes expected to
develop keeping coastal communities a bit cooler.

Tuesday...

could be a wet and cool day as warm front approaches and gets jammed
up to the southwest with moist onshore flow and cool high pres to
the east. Numerous showers expected along with a few t-storms
possible as instability aloft develops. Temps may end up cooler than
forecast with potential for 50s in some locations if it's wet
with SE flow.

Wednesday into Thursday...

low confidence for wed. Earlier guidance was hinting at summer heat
moving into sne for Wed but latest guidance has backed off on this
with boundary remaining near or south of new eng. It all hinges on
positioning of shortwave riding over the ridge which models can't
resolve at this time range. It is still possible the front pushes
to the north with a hot day but this is very much uncertain and
temps could end up below normal.

Mid level trough approaches from the lakes region Thu which will
lead to increasing risk of showers t-storms. If the warm air doesn't
get in here for wed, the approaching trough and cold front should
push warm temps into sne for Thu with potential for 80s.

Aviation 11z Friday through Tuesday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday ... Moderate to high confidence.

Today...VFR. N-nw winds gusting up to 25-35 kt by mid to late
morning, highest across E coastal terminals. Winds shift to
n-ne along the E coast during the afternoon. Low risk for spotty
showers this afternoon across E mass, possibly into ri, but
should remainVFR.

Tonight...VFR. N-ne winds gusting to 25-30 kt this evening
across CAPE cod and the islands, but will back to NW and
diminish by around 04z.

Saturday...VFR. Light w-nw winds back to s-sw during the day,
increasing to 10-15 kt during the afternoon. Scattered showers
may reach into N central and NW mass after 18z with local MVFR
possible.

Kbos terminal... Moderate to high confidence in taf.

Kbdl terminal... Moderate to high confidence in taf.

Outlook Saturday night through Tuesday ...

Saturday night: mainly MVFR, with areasVFR possible. Breezy.

Shra likely, slight chance tsra.

Sunday: mainlyVFR, with local MVFR possible. Breezy. Slight
chance shra, isolated tsra.

Sunday night through Monday night:VFR.

Tuesday: mainly MVFR, with areasVFR possible. Chance shra,
slight chance tsra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday ... High confidence.

Today... Small craft advisories continue on most waters. Have
hoisted gale warnings for the eastern waters, including CAPE cod
bay and nantucket sound as winds increase this afternoon. Nw
winds shift to N and increase, with gusts up to 25-30 kt except
up to around 35 kt on the eastern waters. Seas up to 4 to 7 ft,
highest E of CAPE cod late in the day. Good visibility.

Tonight... N-ne wind gusts up to 35 kt this evening near and E of
cape cod. Winds will become NW and diminish to around 10 kt by
around midnight. Seas 4 to 7 ft early tonight, then slowly
subside but may remain around 5 ft on the waters E of nantucket.

Good visibility.

Saturday... Light NW winds in the morning back to s-sw and
increase to 10-15 kt with some gusts to 20 kt during the
afternoon. Seas 4 ft or less. Good visibility.

Outlook Saturday night through Tuesday ...

Saturday night: winds less than 25 kt. Areas of seas
approaching 5 ft. Rain showers likely, slight chance of
thunderstorms.

Sunday: winds less than 25 kt. Seas up to 5 ft. Slight chance
of rain showers.

Sunday night: winds less than 25 kt. Areas of seas approaching
5 ft.

Memorial day: winds less than 25 kt. Seas locally approaching
5 ft.

Monday night: winds less than 25 kt.

Tuesday: winds less than 25 kt. Chance of rain showers, slight
chance of thunderstorms.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Gale warning from 1 pm this afternoon to 10 pm edt this
evening for anz231-232-250-254-255.

Small craft advisory until 9 pm edt this evening for anz233-
234.

Small craft advisory until 6 pm edt this evening for anz230-
236.

Small craft advisory until 4 pm edt this afternoon for anz237.

Small craft advisory until 8 pm edt this evening for anz235.

Small craft advisory until 8 pm edt this evening for anz251.

Small craft advisory until 2 am edt Saturday for anz256.

Synopsis... Kjc evt
near term... Evt
short term... Evt
long term... Kjc
aviation... Kjc evt
marine... Kjc evt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NLNC3 - 8461490 - New London, CT 14 mi42 min NW 11 G 19
LDLC3 - New London Ledge CT - Ledge Light Weather 14 mi47 min WNW 23 G 34 67°F 1007.2 hPa52°F
MTKN6 - 8510560 - Montauk, NY 24 mi42 min 61°F 53°F1007.5 hPa
QPTR1 - 8454049 - Quonset Point, RI 27 mi48 min WNW 13 G 21 66°F 57°F1005.9 hPa
NWPR1 - 8452660 - Newport, RI 28 mi42 min WNW 17 G 25 65°F 51°F1005.5 hPa
NAXR1 - Narragansett Bay Reserve, RI 32 mi87 min WNW 11 66°F 1006 hPa53°F
PRUR1 32 mi42 min 67°F 51°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 32 mi42 min NW 8.9 G 15 67°F 1006.3 hPa
CPTR1 - 8452944 - Conimicut Light, RI 35 mi42 min W 23 G 31 63°F 58°F1005.7 hPa
FOXR1 - 8454000 - Providence, RI 37 mi42 min NNW 16 G 22 66°F 56°F1005.3 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 41 mi42 min WNW 21 G 28 65°F 1005.2 hPa
FRXM3 41 mi42 min 65°F 52°F
FRVM3 - 8447386 - Fall River, MA 42 mi42 min 64°F 59°F1005.8 hPa
44097 - Block Island, RI (154) 47 mi42 min 54°F5 ft
44017 - 23 Nautical Miles Southwest of Montauk Point, NY 49 mi32 min W 18 G 19 60°F 53°F1008.3 hPa52°F

Wind History for New London, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Westerly, Westerly State Airport, RI3 mi19 minWNW 12 G 2210.00 miA Few Clouds70°F52°F53%1007.2 hPa
Groton / New London, Groton / New London Airport, CT12 mi16 minNW 1710.00 miA Few Clouds71°F50°F47%1007.7 hPa
Block Island State Airport, RI19 mi16 minWNW 13 G 2210.00 miFair63°F54°F73%1007.6 hPa
Montauk, Montauk Airport, NY21 mi18 minWNW 10 G 19 mi64°F52°F65%1008.3 hPa

Wind History from WST (wind in knots)
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6NW3NW63CalmW33CalmNW5NW434NW9
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Tide / Current Tables for Westerly, Pawcatuck River, Rhode Island
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Westerly
Click for Map
Fri -- 12:30 AM EDT     Moonrise
Fri -- 01:34 AM EDT     2.86 feet High Tide
Fri -- 05:21 AM EDT     Sunrise
Fri -- 08:50 AM EDT     0.39 feet Low Tide
Fri -- 10:19 AM EDT     Moonset
Fri -- 02:23 PM EDT     2.41 feet High Tide
Fri -- 08:07 PM EDT     Sunset
Fri -- 09:06 PM EDT     0.81 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.82.82.62.21.81.40.90.50.40.71.31.82.22.42.42.21.91.61.310.811.5

Tide / Current Tables for The Race, Long Island Sound, New York Current
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The Race
Click for Map
Fri -- 12:31 AM EDT     Moonrise
Fri -- 12:39 AM EDT     2.21 knots Max Flood
Fri -- 03:57 AM EDT     -0.00 knots Slack
Fri -- 05:22 AM EDT     Sunrise
Fri -- 07:07 AM EDT     -2.69 knots Max Ebb
Fri -- 10:21 AM EDT     Moonset
Fri -- 10:30 AM EDT     0.00 knots Slack
Fri -- 01:14 PM EDT     2.15 knots Max Flood
Fri -- 04:42 PM EDT     -0.00 knots Slack
Fri -- 07:35 PM EDT     -2.20 knots Max Ebb
Fri -- 08:08 PM EDT     Sunset
Fri -- 10:46 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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2.12.21.71-0-1.2-2.2-2.7-2.4-1.6-0.60.61.62.121.50.7-0.3-1.4-2.1-2.1-1.6-0.80.2

Weather Map and Satellite Images
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GOES 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.
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Wind Forecast for Boston, MA (9,2,3,4)
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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 numerious 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.