Friday, June23, 2017 L-36.com


Marine Weather and Tides
Newport, RI

Version 3.4
What's New / NOTES
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 Friday June 23, 2017 9:56 AM EDT (13:56 UTC) Moonrise 4:55AMMoonset 7:52PM Illumination 0% Phase: New Moon; Moon at 29 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 Am Edt Fri Jun 23 2017
Today..S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Patchy fog this morning. A slight chance of showers and tstms this afternoon. Some tstms may produce heavy rainfall this afternoon. Vsby 1 nm or less this morning.
Tonight..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Vsby 1 nm or less.
Sat..SW winds 5 to 10 kt. Seas 2 to 3 ft. Areas of fog. A chance of showers. Vsby 1 nm or less.
Sat night..W winds 5 to 10 kt. Seas 1 foot or less.
Sun..W winds around 5 kt, becoming sw 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft.
Sun night..SW winds 10 to 15 kt with gusts up to 20 kt, becoming W around 5 kt after midnight. Seas around 2 ft.
Mon..SW winds 5 to 10 kt. Seas 1 foot or less.
Mon night..SW winds 5 to 10 kt. Seas 1 foot or less.
Tue..SW winds 5 to 10 kt. Seas 1 foot or less.
Tue night..SW winds 5 to 10 kt. Seas 1 foot or less. 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 716 Am Edt Fri Jun 23 2017
Synopsis for massachusetts and rhode island coastal waters.. Remnants of cindy along with the threat of heavy rain and Thunder- storms sweeps across the waters around Saturday morning, clearing out late in the day ahead of a sweeping cool front. Visibility impacts forecast during this unsettled weather pattern. Cooler weather into early next week, remaining unsettled. 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 Newport, RI
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location: 41.47, -71.38     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 231106
afdbox
area forecast discussion
national weather service taunton ma
706 am edt Fri jun 23 2017

Synopsis
Mild, humid air builds across the region today into tonight out
ahead of the remnants of cindy which will bring the threat of
heavy rain and possible flooding Saturday morning. A cold front
will sweep the remnants of cindy out to sea through late Saturday,
improving overnight. Seasonably warm and less humid conditions
Sunday will be followed by cooler and somewhat unsettled weather
for early next week. Warmer conditions return for the latter half
of next week.

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

a few showers moving into sne this morning with more
concentrated area of convection across southern pa and md.

Additional showers and t-storms should move into the region
late this morning and early afternoon as mid level shortwave
lifts across the region. Mid level lapse rates are rather weak
which should limit severe potential today, but anomalous pwats
will bring a threat of heavy rainfall.

Stratus and fog along the south coast will gradually erode on
the northern edges but may persist much of the day over the
islands.

Previous discussion...

showers and thunderstorms for the early half of the day,
potential for heavy rain. Consensus of forecast guidance has an
initial wave of tropical energy associated with cindy sweeping
the region during the early half of the day. Collocated low-
level convergence of high theta-e air per nose of h925-85 jet
beneath a psuedo h925-7 warm frontal boundary with parent mid-
level ascent. Especially if there is partial clearing in the
morning presenting the opportunity for the boundary layer to
destabilize, can see an opportunity where the present wave out
of the mid-atlantic to maintain longevity, perhaps becoming
stronger. Thinking mainly across the interior N W away from s
flow off the cooler ocean waters which would keep the surface
more capped. However forecast guidance not so robust. Increasing
moisture with precipitable waters rising towards 2 inches, 0-6
km bulk shear around 30 kts out of the sw, and CAPE around 1-2k
j kg. Am going to lean with high chance pops N W across the
interior. Think the high- res 3 km NAM and both WRF have the
right idea. S E becoming socked in with low clouds, possible
fog, the region cooler at the surface is capped. May see some
showers, perhaps heavy, but greater concern is N w. Looking at
the late morning into early afternoon period. Not so confident
on severe weather outcomes but agree with the marginal risk
advertised by spc. Believe the main threat to be heavy rain and
frequent lightning, some localized nuisance flooding concerns,
with gusty winds and hail secondary threats.

The later half of the day looks to be dry. Behind the morning wave,
a combination of subsidence and mid-level warming around h6-8 puts
the squash on any additional wet-weather activity, stabilizing. If
throughout the day places remain partially clear, some locations
could see highs into the low 90s such as the merrimack river valley.

Continued cool S E under lower clouds, possible fog. Otherwise, main
theme for today is warm and muggy. Dewpoints well into the 60s, some
places near 70.

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

possibility of heavy rain, flooding associated with cindy leftovers.

An anomalous tropical airmass surging NE out ahead of a cold front
baroclinic zone. The tropical-moist plume converging with higher
theta-e ahead of a mean long-wave trough axis at the mid-levels and
beneath decent diffluence within the upper levels, there is support
for deep layer forcing yielding efficient warm-rain processes with
freezing level heights at least above 10 kft, in this case around 14
kft. However outcomes are challenging to nail down and determine as
they can often be underestimated or misplaced by forecast guidance.

In the last several forecast runs, model solutions have waffled with
the remnants of cindy. It makes for subsequent challenges as to the
possibility of flash flooding, if any one area is under particular
threat of seeing an excessive amount of rain in a short period of
time.

But with this forecast there is continued preference to the high-res
3 km NAM and WRF forecast model solutions. Suspect a possibility of
maintenance of shower, thunderstorm activity out of upstate ny and
pa across S new england during the evening hours. Convergent low-
level forcing of high theta-e air beneath continued energy streaming
ne with the tropical-moist plume. Given the lack of diurnal heating,
main concern is the potential for heavy rainers, nuisance flooding.

Then around morning, crux of heavy rain is expected as the remnants
of cindy clash with a cool front dropping s, clearing out through
the afternoon. The 3 km NAM and wrf-arw fit the forecast thinking,
that the broad tropical-moist plume though focused with remnants of
cindy would also converge along the low to mid level cool front that
sweeps across the region through afternoon.

Low confidence at this point concerning exactly where the greatest
threat will be. Will continue to highlight possible flooding hazards
in the hazardous weather outlook. Can't rule out potential for rain-
fall rates of around an inch per hour and excessive rainfall amounts
greater than 2 inches storm-total. Low confidence with respect to
forecast grid rainfall amounts that add up around 0.50-0.75 inches
given the difficulty in determining exactly where the heaviest rainfall
will occur.

The cool front sliding through late in the day, will see potential
blustery SW winds depending on the ability to mix down, perhaps
brought down mechanically via heavy rain given a saturated profile
that is moist adiabatic. Prior to and throughout, low clouds and fog
will likely remain an issue for the s-coast with the possibility of
visibility down to a quarter mile or less requiring headlines. Will
monitor for now.

Behind the front winds back W and we begin to see partial clearing.

Temperatures difficult to forecast given some uncertainty on the
timing of the front and how quickly we clear out. Could warm into
the mid 80s but will keep it conservative with seasonable highs
around the upper 70s to low 80s. With the warm up may see some brief
breezy westerlies behind the front with boundary layer mixing.

Long term Saturday night through Thursday
Highlights...

* seasonably warm and less humid on Sunday
* cooler and somewhat unsettled pattern for early next week with
showers possible at times
* warmer weather returns toward the end of next week
overview...

longwave trof over the gt lakes region will gradually slide east to
new eng Tue Wed timeframe as multiple shortwaves rotate through the
flow. This will bring a somewhat unsettled pattern for the first
half of the week with cooler temps, near or a bit below normal.

Models signaling a pattern change for the end of the week as ridging
builds northward along the east coast which should bring warmer
conditions for the end of next week.

Details...

Saturday night and Sunday...

cold front expected to be moving off the coast Sat evening followed
by drier conditions during the night. Low risk of a lingering
evening shower for the CAPE islands, otherwise clearing skies during
the night with cooler and much less humid airmass moving in.

The dry airmass will continue into Sunday with sunshine mixing with
diurnal CU in the afternoon. Fairly robust mid level shortwave will
move NE from the gt lakes with a secondary cold front moving into
sne. Brunt of shortwave energy passes to the north and west but
can't rule out a few showers developing in the interior in the
afternoon. 850 mb temps 12-13c and soundings indicate deep mixing on
Sunday above 850 mb so temps may overachieve. Expect highs reaching
low to mid 80s, except a bit cooler along the south coast with sw
flow. Comfortable humidity levels with dewpoints in the 50s.

Monday into Wednesday...

mid level trof gradually moves into new eng as series of shortwaves
rotate through the flow. Cooling temps aloft with 500 mb temps
reaching -18 to -20c will likely bring some diurnal showers at times
although certainly not a washout and expect a mix of clouds and sun.

Any showers Mon should be confined to the interior, but all areas
tue as the trof moves into the region. Best chance for any thunder
will likely be Tue with tt into the lower 50s and 500 mb temps
approaching -20c. Upper trof begins to slide to the east on wed.

Cold pool aloft lingers but moisture is limited so expect limited
coverage of any showers wed. Temps slightly below normal with highs
mainly in the 70s and lows in the 50s.

Thursday...

as mid level trof exits, rising heights into new eng as SE us ridge
builds north. High pres moves off mid atlc coast with good warm
advection. Warmer conditions expected with temps possibly reaching
well into the 80s in some locations.

Aviation 12z 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 confidence.

Today...

ifr lifr stratus and fog along the s-coast with sct-bkn low-
endVFR elsewhere. Brief improvement possible at times along the
s-coast up toVFR but ifr may linger over the islands. S winds
around 10 to 15 kts with gusts up to 25 kts, strongest across
e SE new england. Initial showers moving through western new eng
this morning with more shra tsra chances expected over N W ct
and N W ma, mainly afternoon into early evening. Tempo MVFR ifr
with ra +ra.

Tonight into Saturday...

MVFR-lifr CIGS with MVFR-ifr vsbys with br fg. Shra tsra early
tonight approaching from the w. Ra +ra approaching from the sw
towards morning, exiting around midday ahead of a wind shift
from the w. Prior to the wind shift will continue to see sw
winds with potential gusts 25 to 30 kts llws possible for se
coastal terminals as is some embedded tsra. Improving towards
evening to low-endVFR skc.

Kbos terminal...VFR today with gusty SW winds up to 25 kts,
lower CIGS into this evening with increasing rain chances.

Kbdl terminal... May need to watch for possible shra tsra NW of
the terminals around late morning into early afternoon.

Otherwise low-endVFR CIGS today with blustery SW winds that
will lower into evening prior to onset of ra +ra.

Outlook Saturday night through Tuesday ... High confidence.

Sunday and Monday... MainlyVFR with sct-bkn diurnal clouds. A few
diurnal showers possible in the interior
Tuesday... MainlyVFR CIGS with a few showers isolated t-storms
possible.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday ...

sw winds on the increase with gusts up to 25 to 30 kts through
early Saturday prior to a cool frontal passage. Waves building
around 5 to 6 feet on the waters as the remnants of cindy are
advected NE across the waters around Saturday morning. Prior to
and during this time, likely to be either a combination of low
clouds and fog with visibility down to a quarter mile or less
possible. Improving late Saturday as winds become westerly while
beginning to diminish along with wave action.

Outlook Saturday night through Tuesday ... High confidence.

Sunday... Increasing SW flow but speeds should remain below SCA with
a few gusts 20-22 kt nearshore waters in the afternoon.

Monday and Tuesday... Quiet boating weather with winds and seas below
sca.

Tides coastal flooding
Astronomical tides are rather high through this weekend during the
night time cycles. Boston has a 12.3 ft tide just before midnight
tonight, a 12.4 ft high tide around midnight Sat night and 12.2 ft
just after midnight Sun night. Fortunately, offshore winds are
forecast with minimal or no surge so do not anticipate any issues.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory from 8 pm this evening to 11 am edt
Saturday for anz231>234.

Small craft advisory from 8 pm this evening to 8 pm edt
Saturday for anz235-237.

Small craft advisory from 2 pm this afternoon to 11 am edt
Saturday for anz250.

Small craft advisory from 2 pm this afternoon to 8 pm edt
Saturday for anz254>256.

Synopsis... Kjc sipprell
near term... Kjc sipprell
short term... Sipprell
long term... Kjc
aviation... Kjc sipprell
marine... Kjc sipprell
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWPR1 - 8452660 - Newport, RI 4 mi39 min SSW 7 G 8 69°F 64°F1010 hPa
QPTR1 - 8454049 - Quonset Point, RI 8 mi39 min S 8 G 8
NAXR1 - Narragansett Bay Reserve, RI 12 mi72 min SSW 5.1 69°F 1010 hPa68°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 12 mi39 min SSW 1.9 G 7
CPTR1 - 8452944 - Conimicut Light, RI 17 mi39 min S 11 G 13 69°F 72°F1009.7 hPa
FRXM3 19 mi39 min 75°F 69°F
BUZM3 - Buzzards Bay, MA 19 mi57 min SSW 17 G 18 65°F 1010.7 hPa (-0.4)
FRVM3 - 8447386 - Fall River, MA 20 mi39 min 75°F 71°F1010.4 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 20 mi39 min SSW 8 G 11 73°F 1009 hPa
PVDR1 22 mi39 min SSE 12 G 13 70°F 1009.3 hPa69°F
FOXR1 - 8454000 - Providence, RI 23 mi39 min S 8.9 G 11 71°F 70°F1008.8 hPa
44097 - Block Island, RI (154) 37 mi32 min 64°F3 ft
BZBM3 - 8447930 - Woods Hole, MA 38 mi39 min 67°F 67°F1010.6 hPa
NLNC3 - 8461490 - New London, CT 38 mi39 min S 7 G 8 76°F 61°F1009.5 hPa
LDLC3 - New London Ledge CT - Ledge Light Weather 39 mi42 min SSE 2.9 G 4.1 71°F 1009.4 hPa66°F
MTKN6 - 8510560 - Montauk, NY 42 mi39 min 73°F 66°F1010.2 hPa
WAXM3 - Waquoit Bay Reserve, MA 46 mi72 min 1.9 70°F 1011 hPa68°F

Wind History for Newport, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Newport, Newport State Airport, RI7 mi64 minSSW 56.00 miFog/Mist70°F69°F97%1010.3 hPa
N. Kingston / Quonset, RI10 mi67 minSSW 41.50 miFog/Mist68°F64°F88%1010.5 hPa
Providence, Theodore Francis Green State Airport, RI18 mi66 minS 45.00 miFog/Mist71°F70°F96%1010 hPa
Block Island State Airport, RI23 mi61 minSW 1210.00 miFair72°F68°F87%1011.1 hPa
Westerly, Westerly State Airport, RI24 mi64 minSW 67.00 miFair78°F70°F76%1010.4 hPa

Wind History from UUU (wind in knots)
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Tide / Current Tables for Castle Hill, Narragansett Bay, Rhode Island
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Castle Hill
Click for Map
Fri -- 01:35 AM EDT     -0.37 feet Low Tide
Fri -- 04:55 AM EDT     Moonrise
Fri -- 05:12 AM EDT     Sunrise
Fri -- 07:36 AM EDT     3.92 feet High Tide
Fri -- 01:15 PM EDT     -0.61 feet Low Tide
Fri -- 07:51 PM EDT     Moonset
Fri -- 08:00 PM EDT     4.78 feet High Tide
Fri -- 08:23 PM EDT     Sunset
Fri -- 10:32 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0.3-0.3-0.10.61.72.93.73.93.22.10.8-0.2-0.6-0.500.81.93.24.34.84.43.42

Tide / Current Tables for Westport River Entrance, Massachusetts Current
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Westport River Entrance
Click for Map
Fri -- 02:07 AM EDT     0.00 knots Slack
Fri -- 04:53 AM EDT     Moonrise
Fri -- 05:11 AM EDT     Sunrise
Fri -- 06:04 AM EDT     2.47 knots Max Flood
Fri -- 08:29 AM EDT     -0.01 knots Slack
Fri -- 10:54 AM EDT     -2.80 knots Max Ebb
Fri -- 02:42 PM EDT     0.00 knots Slack
Fri -- 06:27 PM EDT     2.15 knots Max Flood
Fri -- 07:50 PM EDT     Moonset
Fri -- 08:22 PM EDT     Sunset
Fri -- 08:42 PM EDT     -0.00 knots Slack
Fri -- 10:32 PM EDT     New Moon
Fri -- 11:15 PM EDT     -3.05 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2-1.1-0.10.81.52.22.52.10.8-0.9-2.4-2.8-2.3-1.5-0.60.211.62.121.1-0.5-2.2-3

Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Northeast    EDIT
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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.