Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Newport, 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 6:31AMSunset 5:26PM Wednesday February 20, 2019 4:56 PM EST (21:56 UTC) Moonrise 7:51PMMoonset 8:26AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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- 330 Pm Est Wed Feb 20 2019
Tonight..SE winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Gusts up to 20 kt. Waves 2 to 3 ft. Patchy fog. Sleet. Snow likely this evening, then rain and freezing rain after midnight. Vsby 1 to 3 nm, decreasing to 1 nm or less after midnight.
Thu..W winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves around 4 ft. Patchy fog in the morning with vsby 1 to 3 nm.
Thu night..W winds 5 to 10 kt with gusts up to 20 kt. Waves around 3 ft.
Fri..NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves 2 to 3 ft.
Fri night..N winds around 5 kt. Waves around 2 ft in the evening, then 1 foot or less.
Sat..E winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less.
Sat night..SE winds 5 to 10 kt. Waves around 2 ft. Rain. Vsby 1 to 3 nm in the evening.
Sun..SE winds around 10 kt, becoming sw in the afternoon. Gusts up to 20 kt. Waves around 3 ft. Rain.
Sun night..W winds 15 to 20 kt with gusts up to 25 kt, increasing to 20 to 25 kt with gusts up to 35 kt after midnight. Waves 4 to 5 ft. A chance of rain in the evening.
Mon..W winds 20 to 25 kt, increasing to 25 to 30 kt in the afternoon. Gusts up to 40 kt. Waves around 3 ft, except up to 8 ft at the bay entrance.
Mon night..NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 35 kt. Waves around 3 ft. At the bay entrance, waves around 6 ft, subsiding to 4 ft after midnight. A chance of light freezing spray after midnight. 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 330 Pm Est Wed Feb 20 2019
Synopsis for massachusetts and rhode island coastal waters.. High pres moves over the waters this evening. Low pres approaches the waters from the sw tonight, then passes over the waters Thu bringing strong se winds to the waters. High pres follows for Fri and Sat. A warm front should approach the waters Sun. 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 202124
afdbox
area forecast discussion
national weather service boston norton ma
424 pm est Wed feb 20 2019

Synopsis
Strong high pressure moves off to the east tonight. Low pressure
from the western gulf of mexico will redevelop along the east
coast tonight and move across new england early Thursday. This
will bring a period of snow and ice, changing to rain along the
coast. High pressure follows with drier air Thursday afternoon
through Saturday. Another round of a wintry mix of precipitation
is possible Saturday night into Sunday, followed by dry and
seasonable conditions next Monday and Tuesday.

Near term until 6 am Thursday morning
Broad upper ridge and surface high pressure are moving east of
new england. Shortwave moving out of the plains will cross the
great lakes tonight and northern new england Thursday. Our prime
concern for tonight is a coastal secondary low developing off
north carolina. This will move up the coast tonight and pass off
the southern new england coastline roughly 09z to 12z. The
leading edge of precipitation associated with this low was
moving up through ct at 3 pm, mainly as light snow but with more
substantial snowfall over the southwest corner of the state.

This snow will spread across southern new england early tonight.

Warmer air aloft is also moving up the coast. Above freezing air
at 850 mb is expected to reach the mass pike around 1 am and the
nh border around 4 am. Southeast winds should bring surface
temps above freezing along the coast and the southeast interior
during the overnight. Weak cold air damming over western and
central sections may hold in surface cold air through the night.

Because of this, we expect a variety of weather during the
night. Snow all areas will mix change to sleet and freezing rain
during the middle of the night, then coastal and some southern
areas will change to rain between midnight and sunrise.

Saturation in the prime growth zone aloft will be limited to a
couple of hours, so accumulations will be limited. Best
potential for snow is one to two inches. Freezing precipitation
overnight will also bring a layer of ice, but this will be
roughly one-tenth inch or less.

The ice that follows the snow will be the more important threat
in creating slippery spots on untreated surfaces. The winter
weather advisory continues through the night.

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

coastal low pressure moves off to the east in the morning.

Lingering light rain drizzle is possible at the start,
especially along eastern mass and ri. Drier air moves in later
in the morning and afternoon. And should eventually eat away the
low moisture and clouds.

Clearing skies will allow daytime heating, with temperatures in
the mixed layer favoring MAX sfc temps in the mid 40s to low
50s. Winds in the mixed layer will be near 30 mph, so expect
gusts in that vicinity during the afternoon.

Thursday night...

high pressure builds over the great lakes, setting up a
northwest flow over new england. This should maintain dry
weather as well as a return of the colder air, with overnight
min temps in the 20s and lower 30s.

Long term Friday through Wednesday
Highlights...

* dry and seasonable Fri sat
* another round of wintry mixed precip changing to rain Sat night sun
* dry and near seasonable weather returns Mon tue
overview...

the big picture weather pattern in the extended features more of
the same... A reloading west coast trough and persistent
subtropical ridge. Several days of high pressure dry weather
interrupted by periodic storm systems ejected from the mid level
trough and directed over the ridge toward southern new england,
first late weekend then again around mid week. Given the
consistent pattern going into this weekend we continue to expect
a messy winter system with a parent low to the northwest and too
much warm air aloft and in the low levels to be a good snow
maker. As mentioned by the previous forecaster, one synoptic
model continues to show quite the interesting track evolution of
the mid week system, but it is much too far out in time to give
much consideration to at this time.

Friday through Saturday...

temps drop into the 20s... Low 30s along the coast. Friday and
Saturday feature plenty of sunshine and seasonable temperatures
under a 1030 mb high pressure and plenty of dry air. 850 temps 0
to -5c and good mixing will lead to high temperatures each day
in the low 40s... Right around normal for late february. Mid-high
clouds will be on the increase from west to east late Saturday
as flow becomes southwest ahead of the next storm system.

Saturday night through Sunday...

Saturday night a shortwave approaches as the surface low moves
into the great lakes region, strengthening as it enters canada.

A weak secondary wave forms along the frontal boundary over the
delmarva and passes over southern new england late Sunday. Ahead
of this we have all the ingredients for a wet weather event.

Plenty of moisture available as a deep fetch of subtropical
moisture stretches up from the gulf brining pwats approaching
1.25". The warm front moves north across the region sometime
late Saturday Sunday with a good signal for isentropic lift over
the colder air at the surface and strong speed convergence at
low levels given an approaching 45-55 kt 925 jet. Currently
expecting a mostly rain event, moreso than the previous Wed thu
event given warmer surface temperatures ahead of the system.

Likely to start out briefly as a wintry mix of snow, sleet, and
freezing rain before becoming all rain. Ahead of the cold front
temperatures look quite warm, in the upper 40s Sunday afternoon.

Monday and Tuesday...

behind the cold front dry and colder weather prevails under
high pressure for the first half of the work week. Gusty winds
on Monday diminish into Tuesday.

Aviation 20z Wednesday through Monday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday night ... High confidence.

Tonight...

conditions will lower to MVFR ifr during the night as snow moves
in from the southwest. Expect MVFR CIGS and ifr vsbys after 7 pm
in the west after 10 pm in the east. Warmer air aloft will
change the snow to sleet and freezing rain between 9 pm and
midnight. Warmer air moving in at the surface on southeast winds
will change the precip to rain roughly 3 to 6 am.

Thursday...

coastal storm moves off to the east. Lingering low clouds and
drizzle during the morning, but this should diminish as drier
air moves in on increasing west winds. BecomingVFR by
afternoon.

Thursday night...

vfr. Breezy west to northwest winds.

Kbos terminal... High confidence in TAF trends. Moderate
confidence in timing precipitation type changes after midnight.

Kbdl terminal... High confidence in TAF trends. Moderate
confidence in timing precipitation type changes after 9 pm.

Outlook Friday through Monday ...

Friday:VFR. Breezy.

Friday night:VFR.

Saturday:VFR. Chance ra.

Saturday night: mainlyVFR, with local ifr possible. Breezy.

Ra, sn likely, fzra.

Sunday: mainlyVFR, with areas ifr possible. Breezy. Ra likely,
fzra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday night ... High confidence.

Tonight...

light southwest winds turn from the southeast. Wind gusts
increasing to 30 knots after midnight. Seas building to 5-8 feet
on the southern and southeast waters after midnight. Snow
changes to sleet and then rain after midnight. Small craft
advisory on most waters.

Thursday...

rain tapers off in the morning. Winds shift out of the west.

Gusts increase to 30 knots by afternoon. Seas linger at 5-8
feet on all exposed waters.

Thursday night...

west-northwest winds gusting to 30 knots. Seas 5-7 feet on the
exposed waters.

Outlook Friday through Monday ...

Friday: winds less than 25 kt. Local rough seas.

Friday night: winds less than 25 kt. Seas locally approaching
5 ft.

Saturday: winds less than 25 kt. Chance of rain.

Saturday night: winds less than 25 kt. Seas locally approaching
5 ft. Rain.

Sunday: low risk for small craft advisory winds with gusts up
to 25 kt. Seas up to 5 ft. Rain likely.

Tides coastal flooding
High astronomical tides are forecast for Thursday, with heights
near 12.5 ft at bos and close to 6 ft at pvd.

Main concern for Thursday is the mid morning high tide in
narragansett bay and buzzards bay, and the late morning high
tide along the east coast. Guidance is suggesting a surge up to
1 ft is possible near high tide which may bring storm tides to
near flood stage at pvd and bos. Expect pockets of minor coastal
flooding, mainly in the usual spots. A coastal flood statement
has been issued.

Box watches warnings advisories
Ct... Winter weather advisory from 7 pm this evening to 7 am est
Thursday for ctz002>004.

Ma... Winter weather advisory from 7 pm this evening to 7 am est
Thursday for maz002>021-026.

Ri... Winter weather advisory from 7 pm this evening to 7 am est
Thursday for riz001>007.

Marine... Small craft advisory from 2 am Thursday to 7 am est Friday for
anz232>234.

Small craft advisory from 2 am to 7 am est Thursday for anz231-
251.

Small craft advisory from midnight tonight to 7 am est Friday
for anz235-237-250-254>256.

Synopsis... Wtb bw
near term... Wtb bw
short term... Wtb
long term... Bw
aviation... Wtb bw
marine... Wtb bw
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWPR1 - 8452660 - Newport, RI 4 mi44 min SW 6 G 9.9 28°F 36°F1032.6 hPa
QPTR1 - 8454049 - Quonset Point, RI 8 mi44 min SW 9.9 G 13 28°F 37°F1032.7 hPa
NAXR1 - Narragansett Bay Reserve, RI 12 mi71 min SW 5.1 29°F 1033 hPa8°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 12 mi44 min WSW 6 G 11 29°F 1032.5 hPa
CPTR1 - 8452944 - Conimicut Light, RI 17 mi38 min SSW 11 G 14 28°F 37°F1032.5 hPa
BUZM3 - Buzzards Bay, MA 19 mi56 min SW 7 G 8.9 28°F 1033.5 hPa (-0.6)
FRXM3 19 mi38 min 29°F 8°F
FRVM3 - 8447386 - Fall River, MA 20 mi38 min 28°F 41°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 20 mi38 min SSW 9.9 G 11 29°F 1032.5 hPa
PVDR1 22 mi44 min SSW 8 G 11 30°F 1032.3 hPa8°F
FOXR1 - 8454000 - Providence, RI 23 mi44 min SW 5.1 G 7 29°F 37°F1031.7 hPa
44097 - Block Island, RI (154) 37 mi26 min 42°F1 ft
BZBM3 - 8447930 - Woods Hole, MA 38 mi44 min 28°F 35°F1032.5 hPa
NLNC3 - 8461490 - New London, CT 38 mi44 min S 1.9 G 2.9 28°F 37°F1032 hPa
LDLC3 - New London Ledge CT - Ledge Light Weather 39 mi46 min SW 2.9 G 2.9 28°F 1028.1 hPa20°F
MTKN6 - 8510560 - Montauk, NY 42 mi44 min 30°F 36°F1031.9 hPa
WAXM3 - Waquoit Bay Reserve, MA 46 mi71 min SSE 1.9 29°F 1033 hPa10°F

Wind History for Newport, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Newport, Newport State Airport, RI7 mi63 minSSW 510.00 miOvercast27°F9°F46%1032.7 hPa
N. Kingston / Quonset, RI10 mi66 minSW 815.00 miOvercast28°F5°F37%1032.8 hPa
Providence, Theodore Francis Green State Airport, RI18 mi65 minSSW 1110.00 miOvercast29°F9°F43%1032.6 hPa
Block Island State Airport, RI23 mi60 minSW 86.00 miLight Snow30°F21°F72%1032.9 hPa
Westerly, Westerly State Airport, RI24 mi63 minS 89.00 miOvercast31°F17°F56%1032.6 hPa

Wind History from UUU (wind in knots)
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W8NW9NW11NW11NW8NW8NW8NW8NW7N5W4NW4NW3N4N5W43CalmCalmCalm3SW5
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2 days agoS8S5SW3CalmS3S4CalmCalmNE3NE6E5E5E8E9N6E6NE7NE6N8N5N6NW7NW7NW8

Tide / Current Tables for Castle Hill, Narragansett Bay, Rhode Island
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Castle Hill
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Wed -- 01:43 AM EST     -1.03 feet Low Tide
Wed -- 06:33 AM EST     Sunrise
Wed -- 07:25 AM EST     Moonset
Wed -- 08:01 AM EST     4.40 feet High Tide
Wed -- 02:15 PM EST     -0.94 feet Low Tide
Wed -- 05:24 PM EST     Sunset
Wed -- 06:50 PM EST     Moonrise
Wed -- 08:25 PM EST     4.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.9-1-0.60.31.52.83.94.4431.70.4-0.5-0.9-0.8-0.10.92.23.44.14.13.32

Tide / Current Tables for Westport River Entrance, Massachusetts Current
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Westport River Entrance
Click for Map
Wed -- 02:55 AM EST     0.00 knots Slack
Wed -- 06:30 AM EST     2.31 knots Max Flood
Wed -- 06:32 AM EST     Sunrise
Wed -- 07:24 AM EST     Moonset
Wed -- 08:47 AM EST     -0.00 knots Slack
Wed -- 11:21 AM EST     -3.09 knots Max Ebb
Wed -- 03:08 PM EST     0.00 knots Slack
Wed -- 05:23 PM EST     Sunset
Wed -- 06:49 PM EST     Moonrise
Wed -- 06:55 PM EST     2.75 knots Max Flood
Wed -- 09:23 PM EST     -0.01 knots Slack
Wed -- 11:52 PM EST     -2.94 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.5-1.7-0.80.10.91.72.22.21.3-0.4-2.1-3-2.9-2.1-1.2-0.10.91.82.52.72.20.8-1.1-2.6

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 (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.