Sunday, June25, 2017 L-36.com


Marine Weather and Tides
Tiverton, RI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:10AMSunset 8:24PM Sunday June 25, 2017 11:34 PM EDT (03:34 UTC) Moonrise 6:58AMMoonset 9:49PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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- 1007 Pm Edt Sun Jun 25 2017
Overnight..W winds 5 to 10 kt. Seas 1 foot or less.
Mon..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.
Mon night..SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
Tue..SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft.
Tue night..W winds 5 to 10 kt. Seas 1 foot or less. A chance of showers.
Wed..W winds 5 to 10 kt. Seas 1 foot or less.
Wed night..SW winds 5 to 10 kt. Seas 1 foot or less.
Thu..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Thu night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Fri..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers and tstms.
Fri night..SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms. Winds and seas 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 1007 Pm Edt Sun Jun 25 2017
Synopsis for massachusetts and rhode island coastal waters.. SW winds will remain breezy with gusts upwards of 20 kts through Tuesday with fair weather prior to a cold front sweeping the waters Tuesday night with showers. But winds are quickly back to being southwesterly and breezy as high pressure settles s/e of the waters through the end of the week into the weekend as storm centers track n/e across the E great lakes region. Additional wet-weather chances during this time frame. 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 Tiverton, RI
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location: 41.63, -71.21     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 260200
afdbox
area forecast discussion
national weather service taunton ma
1000 pm edt Sun jun 25 2017

Synopsis
Scattered showers and isolated thunderstorms will diminish by
midnight. Additional upper level disturbances move across new
england on Monday and Tuesday, bringing a few showers or
isolated thunderstorm. Then a warming trend begins for the
latter half of the week with a return to summer heat and
humidity by Friday. A warm front may bring some showers Thursday
with more showers and thunderstorms possible Friday and
Saturday. A backdoor front may drop south into the region
Saturday.

Near term until 6 am Monday morning
10 pm update...

area of showers and isold t-storms moving through ma have
developed in the right entrance region of the upper jet. Wind
gusts to 30-40 kt have been reported. More showers are
developing in eastern ny and hrrr indicates these will hold
together as they move across the ma pike region next few hours.

Updated pops to reflect current trends and hi-res guidance.

Previous discussion...

lingering instability along with the right entrance region of
the upper jet... This may support a few showers tstms through the
first hours of the night. Upper shortwave moving along the
canadian border moves off to the northeast tonight. The
instability will diminish and the upper jet will shift southeast
during the night, so expect any showers to end and skies clear.

Clearing skies and light wind will allow some radiational
cooling. With dew points in the 50s, expect min temps mainly in
the 50s... Except low 60s in some urban centers.

Short term 6 am Monday morning through Monday night
Upper flow remains cyclonic. A weak shortwave moves through the
flow and across new england on Monday. Temps aloft will be a
couple of degrees cooler, with solar heating working on the
surface temperatures. The resulting lapse rates should be
favorable for a few showers tstms.

Mixing will again reach high, up to 800 mb or a little higher.

Temps at that level, equivalent to 11c at 850 mb, will support
max temps in the upper 70s and the low 80s.

Convection will again diminish after sunset with clearing skies
and light wind. With dew points in the 50s, expect min temps in
the 50s and low 60s.

Long term Tuesday through Sunday
Highlights...

* a few showers isold t-storm possible Tue wed
* warming trend toward end of the week with return to summer
heat humidity by fri
* thunderstorm chances increase Thursday night through Saturday
* low confidence - backdoor front possible far northeast ma sat.

Overview...

mid level trough exits new england wed., followed by building
heights as subtropical ridge builds over the western atlantic.

Polar jet will be in the vicinity of new eng next weekend which
will leave us susceptible to weak shortwave passages. A warm
front will meander back and forth near the ma nh border Friday
through Sunday with a series of weak low pressure systems moving
along the boundary. Thus the chance of showers and
thunderstorms will increase as we head into the weekend.

Details...

Tuesday and Wednesday...

strong mid-level shortwave trough lifts northeast from the great
lakes Tue with axis of the trough moving into new england by
tue. Evening before exiting on wed. With 500 mb temps cooling
to -18 to -20c, will see scattered showers and isolated
thunderstorms. The best chances, where k indices reach 25-30
along with total totals greater than 50, will be in the
northwest half of the region, west of a line from northern ct to
the merrimack valley.

For the second run in a row, the ecwmf shows a surface trough
south of new england, which creates an area of rain showers for
south coastal ri and southeast ma tue. Night into early wed.

Morning. Will forecast a chance of showers there.

On wed, mid level trough exits the region. There will still be a
cold pool aloft, hence total totals indices in the lower 50s.

However, the column will be drying out with westerly winds and
k indices struggling to surpass 20-25. Cannot rule out a slight
chance of a few showers. But not expecting thunder.

Highs both tue. And wed. From 77 to 80 in the interior.

Thursday...

increasing warm advection pattern as warm front approaches from
the SW will lead to increasing clouds. Southwesterly low level
jet is forecast to increase to 40-50 kt at 850 mb by late in the
day. Despite some cloud cover temperatures will rise to the mid
80s and this will allow for mixing to create wind gusts to 20-30
mph, especially in the coastal plain.

Gfs and ECMWF now in agreement that the warm front will move to
near the ma nh vt border by thu. Evening. There is a pronounced
increase in k indices as high theta-e air moves in from the
west. The implication is that a cluster of thunderstorms,
possibly severe to our west, will travel eastward along the warm
front, aided by swift 55-70 kt west winds at 500 mb. There is a
good chance of thunderstorms in northern and western ma late
thu. Afternoon and thu. Night as a result, with scattered
storms possible elsewhere thu. Night.

Friday and Saturday...

somewhat tricky forecast due to placement of active frontal
boundary. Very unstable air mass in place both fri. And sat.

High temperatures will reach well into the 80s with near 90
possible. Dewpoint temperatures are forecast to hover between
the upper 60s and lower 70s. The frontal boundary is forecast to
become quasi- stationary near the ma vt nh border by
Saturday... And it may even shift southward a tad as a backdoor
cold front into the CAPE ann region on Saturday.

Several thousand joules of CAPE are possible on either day.

Scattered thunderstorms are expected both days and there is the
potential for severe weather, with wet microbursts a possibility.

Helicity values could be higher near the ma nh vt border, close
to the front, which may add to severe potential.

Sunday...

tricky forecast continues... With models suggesting a slow moving
surface trough and a continued chance of scattered showers and
thunderstorms. Highs mainly in the mid 80s due to cloud cover,
but subject to change... Could be higher if more sunshine.

Aviation 02z Monday through Friday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Monday night ... High confidence.

654 pm update...

tonight...

vfr. Scattered showers and isolated thunderstorms will progress
eastward across portions of southern new england tonight,
exiting the coast around 04-05z. Brief MVFR vsbys in any
showers. Clearing skies overnight with light winds.

Monday into Monday night...

vfr. Daytime heating will develop cumulus clouds with bases
4000-5000 feet. These will lead to scattered showers and a few
thunderstorms. Brief vsbys below 5 miles in any showers.

Clouds and showers dissipate after sunset.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Tuesday through Friday ...

Tuesday and Wednesday... High confidence.

MainlyVFR. A few showers and isold t-storms possible Tue and
still can't rule out a shower on wed.

Thursday... Moderate confidence.

MainlyVFR with CIGS lowering from NW to se. Afternoon showers
possible in the interior with showers t-storms possible all sne thu
night. Gusty SW winds to 25-30 kt developing, especially
coastal plain.

Friday... Moderate confidence.

Patchy early morning fog, with local MVFR. ThenVFR, except
local ifr in possible strong thunderstorms, mainly during the
afternoon and evening hours. MVFR in patchy fog late Friday
night, especially south coast.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Monday night ... High confidence.

High pressure offshore with west to southwest winds. Speeds
should remain 20 knots or less. Seas have diminished, and should
remain at 4 feet or less through the period.

Outlook Tuesday through Friday ...

Tuesday and Wednesday... High confidence. Quiet boating weather with
winds and seas below sca. Gusts to 20 kt possible nearshore waters.

Thursday... Moderate confidence. Small craft advisories will
likely be needed. Increasing SW winds with gusts to 25+ kt
likely, especially over nearshore waters. Building seas may
reach 6 to 8 ft over southern waters Thu night. Chance of
showers and thunderstorms Thursday night.

Friday... Moderate confidence. SW winds continue, mainly 20-25 kt
with seas 4-8 ft over the southern waters and 3 to 6 ft over the
eastern waters. Scattered thunderstorms, some with reduced
visibilities and strong gusty winds.

Tides coastal flooding
High astronomical tides have peaked at most spots, but still at
high levels for at least one more cycle. The overnight tide
cycle will be the one of concern, with boston reaching 12.2 feet
after midnight tonight. Tidal departures will be around 0.3 to
0.4 feet along the massachusetts east coast. This means
conditions will be high enough along the mass east coast for at
least some minor splashover at high tide.

Subsequent high tides will be trending lower, and thus less of a
risk for splashover concerns.

Equipment
Kbox radar is down. Technicians have been notified and will be
looking into the problem.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Wtb gaf
near term... Wtb kjc
short term... Wtb
long term... Gaf
aviation... Wtb gaf
marine... Wtb gaf
tides coastal flooding...

equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FRXM3 5 mi46 min 70°F 60°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 5 mi46 min SW 12 G 14 71°F 1012.4 hPa
FRVM3 - 8447386 - Fall River, MA 6 mi46 min 71°F 72°F1013.9 hPa
NAXR1 - Narragansett Bay Reserve, RI 7 mi109 min WSW 7 69°F 1013 hPa59°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 7 mi52 min W 8.9 G 14 69°F 1013.1 hPa
CPTR1 - 8452944 - Conimicut Light, RI 9 mi46 min WSW 11 G 14 70°F 72°F1013.5 hPa
QPTR1 - 8454049 - Quonset Point, RI 11 mi52 min WSW 12 G 14 69°F 68°F1013.8 hPa
NWPR1 - 8452660 - Newport, RI 11 mi46 min WSW 7 G 8.9 68°F 65°F1013.4 hPa
FOXR1 - 8454000 - Providence, RI 16 mi46 min NNE 5.1 G 8.9 71°F 69°F1013.2 hPa
BUZM3 - Buzzards Bay, MA 19 mi34 min SW 16 G 16 66°F 1013.9 hPa (-0.4)
BZBM3 - 8447930 - Woods Hole, MA 29 mi46 min 65°F 68°F1013.6 hPa
WAXM3 - Waquoit Bay Reserve, MA 36 mi109 min 1.9 67°F 1014 hPa63°F
44097 - Block Island, RI (154) 46 mi39 min 65°F3 ft
44090 49 mi60 min 63°F1 ft

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Newport, Newport State Airport, RI7 mi41 minVar 310.00 miMostly Cloudy67°F60°F79%1013.5 hPa
New Bedford, New Bedford Regional Airport, MA13 mi41 minWSW 610.00 miMostly Cloudy67°F55°F68%1013 hPa
Providence, Theodore Francis Green State Airport, RI14 mi43 minW 610.00 miFair69°F57°F68%1013.5 hPa
Taunton, Taunton Municipal Airport, MA21 mi42 minN 010.00 miFair66°F57°F75%1013.6 hPa

Wind History from UUU (wind in knots)
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Last 24hrCalmCalmW4NW6W4NW3W4W4W4W6NW6W43S106
G17
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4W65W9NW7W10
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2 days ago3S54S7S7S5S5S5S8S5S8S9S7S9S13
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Tide / Current Tables for Anthony Point, Sakonnet River, Rhode Island
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Anthony Point
Click for Map
Sun -- 03:11 AM EDT     -0.53 feet Low Tide
Sun -- 05:11 AM EDT     Sunrise
Sun -- 06:58 AM EDT     Moonrise
Sun -- 09:28 AM EDT     4.75 feet High Tide
Sun -- 02:50 PM EDT     -0.57 feet Low Tide
Sun -- 08:23 PM EDT     Sunset
Sun -- 09:48 PM EDT     Moonset
Sun -- 09:51 PM EDT     5.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
20.6-0.2-0.5-0.40.112.43.84.64.63.62.10.6-0.4-0.6-0.30.31.32.645.15.44.8

Tide / Current Tables for Westport River Entrance, Massachusetts Current
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Westport River Entrance
Click for Map
Sun -- 12:07 AM EDT     -3.06 knots Max Ebb
Sun -- 03:52 AM EDT     0.00 knots Slack
Sun -- 05:11 AM EDT     Sunrise
Sun -- 06:58 AM EDT     Moonrise
Sun -- 07:47 AM EDT     2.64 knots Max Flood
Sun -- 10:14 AM EDT     -0.01 knots Slack
Sun -- 12:39 PM EDT     -2.82 knots Max Ebb
Sun -- 04:33 PM EDT     0.00 knots Slack
Sun -- 08:11 PM EDT     2.17 knots Max Flood
Sun -- 08:22 PM EDT     Sunset
Sun -- 09:47 PM EDT     Moonset
Sun -- 10:26 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-3.1-2.7-1.8-0.80.111.82.42.620.4-1.4-2.6-2.8-2.2-1.3-0.50.41.11.82.21.90.7-1

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Boston, MA (23,6,7,8)
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Ground Weather Radar Station Boston, MA
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weather_mapweather_map weather_map

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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.