Friday, September20, 2019 L-36.com


Marine Weather and Tides
Weekapaug, RI

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:31AMSunset 6:50PM Friday September 20, 2019 4:14 PM EDT (20:14 UTC) Moonrise 10:32PMMoonset 12:37PM Illumination 58% Phase: Waning Gibbous; Moon at 21 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- 318 Pm Edt Fri Sep 20 2019
Tonight..W winds 5 to 10 kt. Seas around 4 ft.
Sat..W winds around 5 kt, becoming sw in the afternoon. Seas 2 to 3 ft.
Sat night..SW winds around 5 kt. Seas around 2 ft.
Sun..SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft.
Sun night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft.
Mon..SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas around 5 ft.
Mon night..SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 6 ft. A chance of showers in the evening, then showers likely after midnight.
Tue..W winds around 10 kt. Seas around 5 ft. A chance of showers in the morning.
Tue night..NW winds 5 to 10 kt. Seas around 4 ft.
Wed..NW winds 5 to 10 kt, becoming sw in the afternoon. Seas around 4 ft.
Wed night..SW winds 5 to 10 kt. Seas around 4 ft. 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 318 Pm Edt Fri Sep 20 2019
Synopsis for massachusetts and rhode island coastal waters.. High pres builds slowly S of the waters through Sun. Meanwhile E swell from distant hurricane humberto will impact the waters into Sat. A cold front approaches the waters Mon night, sweeping across the waters early 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 Weekapaug, RI
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location: 41.33, -71.76     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 201908
afdbox
area forecast discussion
national weather service boston norton ma
308 pm edt Fri sep 20 2019

Synopsis
High pressure remains in control into Monday with summer-like
temperatures and dry weather. A cold front will bring a period
of showers late Monday and Monday night followed by cooler but
seasonably warm weather through the rest of the week.

Near term until 6 am Saturday morning
Shortwave energy passes well to the north and east of sne
tonight which will reinforce NW flow aloft. Quiet night on tap
with mainly clear skies and light winds. Not as cool as
previous nights as airmass has moderated. Mins mostly in the
low mid 50s, with some upper 40s in the colder spots in western
ma and interior eastern ma.

Short term 6 am Saturday morning through Saturday night
Saturday...

mid level ridge builds across new eng with warming temps aloft.

Expect lots of sunshine and warmer temps. 925 mb temps 20-21c
so we should see highs into the low mid 80s, except upper 70s
along the immediate coast as sea breezes develop.

While the swell from hurricane humberto will be subsiding, it
will not be entirely gone. Still an elevated risk for rip
currents Saturday. If going to the beach this weekend, be
especially cautious if there are no lifeguards present.

Saturday night...

mainly clear skies with some high clouds spilling into the
region as mid level shortwave approaches. Lows ranging through
the 50s.

Long term Sunday through Thursday
Highlights...

* continued dry weather with mild daytime temperatures Sunday.

* rain brief downpours associated with cold front Monday night-
Tuesday. Possible embedded thunder.

* brief cooldown Tuesday, turning warmer by late week weekend.

Details...

Sunday...

upper-level ridge crests and shifts eastward into the gulf of maine
by early Sunday. Continued mild and dry weather looks to continue
into Sunday under surface high pressure and highs into the 80s. Will
also see some southwesterly breezes, strongest toward the south
coast (nearing 25 mph). Later Sunday into the overnight,
geopotential heights start to fall and ribbon of mid-high level
moisture on increasing west-southwest flow should lead to an
increase in clouds. Combination of clouds and southwesterly winds
should keep temperatures from falling too far - into the 60s most
areas.

Monday - Tuesday...

first part of Monday now looking to be dry, though cloud cover will
be steadily filling lowering from west to east in advance of a cold
front. Guidance still keying on frontal passing timing beginning
mainly after sundown (12z NAM is a few hours earlier) through the
first half of the evening across interior ma ct and ri and not until
the overnight toward the boston-providence i-95 corridor, and into
early Tuesday on the cape, islands and coastal waters.

Ahead of and along the front, deep layer moisture quality improves
with pwat values rising to 1.5-1.75" and warm cloud depths are
between 10-12kft. These values argue for brief downpours along what
would likely be a strongly-forced band of frontal rain, perhaps
embedded with rumbles of thunder driven mainly from favorable
dynamics versus convective instability. Any embedded thunder would
only serve to enhance rainfall rates, and while wind fields are
strong with straight hodographs, strong storms aren't anticipated in
light of the meager instability progged given unfavorable time of
day and weak mid-level lapse rates. Even the faster NAM only
generates about 500 j kg or less of CAPE from a most-unstable parcel
ascent.

Still some leftover showers into Tuesday on the cape, but across the
interior looking at variable clouds with cold advection bringing
temps closer to seasonal values. With cooler thermal profiles aloft,
may still be enough moisture and shallow instability to produce some
spotty daytime convective showers in northern ma mainly near and
north of route 2. Still some lingering clouds but dry
weather anticipated by Tuesday night.

Wednesday thru Friday:
by Wednesday, the 500 mb pattern across the eastern roughly two
thirds of CONUS transitions to one of quasi-zonal flow - governed by
a prominent upper low over hudson bay with mean troughing into the
northern plains and northern rockies, a closed low over the desert
southwest, and a subtropical ridge over the deep south into the
northern gulf of mexico.

Wednesday's looking largely dry, with temperatures moderating amid
850 mb temperatures rising to the 10-12c range supporting 70s to
near 80s. Still some level of uncertainty on a potential frontal
passage Thursday - with the GFS canadian indicating a wetter frontal
passage than the ECMWF is, though limited moisture from the gulf of
mexico could lend support to the drier FROPA indicated by the ec.

Looking ahead, another period of above-normal temps looks to be in
the offing for late next week into next weekend per most models and
teleconnection forecasts centered in the 6-10 day period. It also
jives with cpc's 6-10 day temperature outlook showing a significant
tilt in the odds toward above-normal temperatures across southern
new england.

Aviation 19z Friday through Wednesday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday night ... High confidence.

Vfr with light winds. Sea breezes developing by midday
Saturday.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Sunday through Tuesday ...

Saturday night:VFR.

Sunday through Sunday night:VFR. Breezy.

Monday: mainlyVFR, with local MVFR possible. Breezy. Slight
chance shra.

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

Chance shra.

Tuesday: mainlyVFR, with areas MVFR possible. Slight chance
shra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday night ... High confidence.

Light winds through the period. Peak of the swell from humberto
will be this evening, then seas will gradually subside through
sat Sat night. Small craft advisories due to rough seas
continue across the outer coastal waters into sat.

Outlook Sunday through Tuesday ... Moderate confidence.

Saturday night through Sunday: winds less than 25 kt.

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

Monday: low risk for small craft advisory winds with gusts up
to 25 kt. Local rough seas.

Monday night: low risk for small craft advisory winds with
gusts up to 25 kt. Areas of rough seas. Rain showers likely.

Tuesday: winds less than 25 kt. Local rough seas. Chance of
rain showers.

Box watches warnings advisories
Ct... None.

Ma... High surf advisory until 6 pm edt this evening for maz007-019-
020-022>024.

Ri... High surf advisory until 6 pm edt this evening for riz006>008.

Marine... Small craft advisory until 2 pm edt Saturday for anz250-254.

Small craft advisory until 8 am edt Saturday for anz251.

Small craft advisory until 11 am edt Saturday for anz255.

Small craft advisory until 6 am edt Saturday for anz256.

Synopsis... Kjc loconto
near term... Kjc
short term... Kjc
long term... Loconto
aviation... Kjc loconto
marine... Kjc loconto


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 17 mi44 min WSW 19 G 21 69°F 1018.1 hPa58°F
NLNC3 - 8461490 - New London, CT 18 mi56 min SW 5.1 G 9.9 75°F 68°F1020 hPa
MTKN6 - 8510560 - Montauk, NY 22 mi56 min 70°F 68°F1020.8 hPa
NWPR1 - 8452660 - Newport, RI 26 mi68 min S 2.9 G 4.1 77°F 62°F1019.7 hPa
QPTR1 - 8454049 - Quonset Point, RI 26 mi68 min ESE 4.1 G 6 72°F 67°F1019.7 hPa
NAXR1 - Narragansett Bay Reserve, RI 31 mi89 min E 2.9 74°F 1020 hPa56°F
PRUR1 31 mi62 min 74°F 59°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 31 mi56 min NE 1 G 2.9 76°F 1020.1 hPa
CPTR1 - 8452944 - Conimicut Light, RI 35 mi56 min S 5.1 G 5.1 70°F 68°F1019.3 hPa
PVDR1 37 mi56 min N 2.9 G 7 80°F 1019.6 hPa51°F
FOXR1 - 8454000 - Providence, RI 38 mi56 min NNE 8 G 11 78°F 66°F
BUZM3 - Buzzards Bay, MA 39 mi74 min WSW 14 G 15 66°F 1020.3 hPa (-2.0)
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 40 mi56 min SW 8.9 G 8.9 72°F 1019.4 hPa
FRXM3 40 mi68 min 74°F 54°F
FRVM3 - 8447386 - Fall River, MA 41 mi68 min 77°F 68°F1019.9 hPa
44097 - Block Island, RI (154) 42 mi44 min 67°F9 ft

Wind History for New London, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Westerly, Westerly State Airport, RI3 mi21 minWSW 9 G 1910.00 miFair74°F57°F57%1020.3 hPa
Block Island State Airport, RI14 mi18 minW 13 G 1810.00 miFair0°F0°F%1020.7 hPa
Groton / New London, Groton / New London Airport, CT15 mi18 minSW 1210.00 miFair73°F55°F53%1019.9 hPa
Montauk, Montauk Airport, NY19 mi20 minW 7 mi74°F52°F46%1020.9 hPa

Link to 5 minute data for KWST

Wind History from WST (wind in knots)
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Last 24hrSW63CalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW5NW65445SW8SW9
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1 day agoNE9
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NE7NE4NE4NE3N3N33CalmCalmCalmCalmCalmCalmCalmCalmN4N7E8NW6E45S7SW5
2 days agoN8NE8NE3NE3NE3NE4N4N3N3CalmCalmN3N3N4N3N4N5
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Tide / Current Tables for Weekapaug Point, Block Island Sound, Rhode Island
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for The Race, Long Island Sound, New York Current
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The Race
Click for Map
Fri -- 12:49 AM EDT     2.23 knots Max Flood
Fri -- 03:54 AM EDT     -0.00 knots Slack
Fri -- 06:33 AM EDT     Sunrise
Fri -- 07:07 AM EDT     -2.30 knots Max Ebb
Fri -- 10:02 AM EDT     0.00 knots Slack
Fri -- 12:38 PM EDT     Moonset
Fri -- 01:07 PM EDT     2.32 knots Max Flood
Fri -- 04:11 PM EDT     -0.00 knots Slack
Fri -- 06:49 PM EDT     Sunset
Fri -- 07:37 PM EDT     -2.61 knots Max Ebb
Fri -- 10:33 PM EDT     Moonrise
Fri -- 10:50 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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22.21.70.9-0.1-1.1-1.9-2.3-2-1.2-011.92.321.20.2-0.8-1.8-2.5-2.6-2-0.90.2

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 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.