Friday, October30, 2020
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Marine Weather and Tides
Acushnet Center, MA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
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.

Sunrise 7:12AMSunset 5:41PM Friday October 30, 2020 11:57 AM EDT (15:57 UTC) Moonrise 5:36PMMoonset 6:02AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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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ANZ234 Buzzards Bay- 1016 Am Edt Fri Oct 30 2020
.gale warning in effect until 5 pm edt this afternoon...
This afternoon..N winds 20 to 25 kt with gusts up to 40 kt. Seas 4 to 6 ft. Rain. Vsby 1 to 3 nm.
Tonight..N winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft.
Sat..N winds 5 to 10 kt, becoming ne in the afternoon. Seas around 2 ft.
Sat night..S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft.
Sun..S winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Showers likely.
Sun night..SW winds 15 to 20 kt, becoming W after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. Showers likely.
Mon..W winds 20 to 25 kt with gusts up to 35 kt. Seas 3 to 4 ft.
Mon night..W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers.
Tue..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Tue night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 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 1016 Am Edt Fri Oct 30 2020
Synopsis for massachusetts and rhode island coastal waters.. Strong onshore winds will continue today as a low-pressure system passes to our southeast. Gale warning in effect for the coastal waters tonight through this evening. Wind gusts up to 45 kts will be possible with wave heights from 10-15 feet over the outer waters. High pressure follows this evening into Saturday. Another area of low pressure passes to the north on Sunday followed by high pressure mid week. For additional information on possible hazardous weather for the week ahead, please visit www.weather.gov/boston/ehwo.


7 Day Forecast for Marine Location Near Acushnet Center, MA
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location: 41.67, -70.86     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 301355 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 955 AM EDT Fri Oct 30 2020

SYNOPSIS. Snow, except for rain across the Cape and Islands, will taper off by early afternoon as the storm responsible moves off to our east. High pressure moves in for tonight tonight into Saturday. A frontal system will bring rain late Sunday and Sunday night followed by blustery and colder weather Monday into Tuesday. Milder conditions return for the end of the week.

NEAR TERM /THROUGH TONIGHT/. 945am update .

Rain/snow line has gradually pushed further south and east as colder air has come in. A good proxy for the change over is the 925mb temperature of -2 to -2.5C. Looks like the models were all a bit too slow with bringing in the colder air, as the changeover - especially across eastern/southeast MA - has occurred a little quicker than forecast. Made some adjustments to the temperatures and change to snow as a result. Backedge of the snow stretches from around Orange MA into NW CT, and is making steady progress east. We do have a low level coastal front that has developed from about Marshfield MA southeastward to around New Bedford with more northerly component to the winds west of this front and surface temperatures 30-33F west and 37-40F east of the front. Radar also showing a bit of enhancement in the returns as well. Given the air temperatures where it's snowing hovering around freezing, and road temperatures also in that range, think just some wet slush at most. But as the snow ends, temperatures will rise a few degrees later this afternoon, so no linger impacts on roads are expected. Winds still breezy across the Cape and the immediate coast of the south shore, but not expecting them to get any stronger. Will likely take down the Wind Advisory a little early. Will monitor the winter weather advisory status as well.

7 am update .

Several observations networks including mPing, ASOS, and social media reports indicate many locations changing over to snow already this morning. The correlation coefficient product on the radar indicates the rain/snow line draped from northern RI to Norwood. Only seeing minor accumulations at this hour, but HREF guidance indicates a period of moderate to heavy snow should arrive between 8am and noon. Best chance is central MA and areas south where mesoanalysis shows the best area of 850 mb frontogenesis.

Previous Discussion .

*** Accumulating Snow Likely this morning into the Boston- Providence-Hartford corridor ***

Lull in the precipitation early this morning as dry slot has overspread the region as remnants of Zeta has moved to the east. However, mid level trough moves into the region this morning with right entrance region of impressive upper level jet and deep moisture plume. Deformation band developing to the west with cooling cloud tops and this expected to sweep across SNE this morning into the afternoon from west to east which will bring another period of heavier precip to SNE.

As this band of precip moves into SNE, the column will be cooling from top down over the higher terrain early this morning, then expanding east to the coastal plain after daybreak. The colder air is quite impressive with 925 mb temps falling to -3 to -6C after 12z with colder air even reaching the coast. This will result in rain flipping to snow with changeover line reaching the I-95 corridor from BOS-PVD and Hartford around 12z, then pushing south and east across SE MA to the south coast around 14-18z.

Given the cold temps aloft and potential heavier precip, temps expected to fall to 30-33F as the heavier precip moves in so expect snow to accumulate after initial melting. A period of moderate to briefly heavy snow is possible this morning, with HREF targeting area from NE CT and NW RI then NE along and west of the I-95 corridor into central MA for heaviest snowfall. Snow accums of 2-4 inches is possible in this region which will impact the morning commute. We expanded the winter weather advisory to include western Norfolk and southeast Middlesex counties. Kept Boston and areas to the north out of the advisory as heavier precip is expected to be just south of this region. Even if 4 inch amounts are realized we don't think power outages will be a major concern as temps will be falling below freezing with somewhat higher snow liquid ratios.

We expect minor accum further south and east across RI and SE MA later this morning into early afternoon with an inch or 2 possible, which includes Providence and Boston. Precip will likely remain mostly rain from Plymouth to Cape Cod, except perhaps ending as brief period of snow.

Across the CT valley, accumulation will likely be limited as heavier precip may remain to the east so temps may not get as cold with accum limited to around an inch on non paved surfaces in the valley but higher amounts over the hills.

The storm will be exiting during the afternoon with gradual improving conditions from NW to SE as precip ends with partial clearing expected in the interior by late afternoon. Along the SE New Eng coast, rain may linger into late afternoon.

Windy over Cape/Islands with gusts 40-50 mph, strongest over the Islands. Winds will gradually diminish after 18z. Given trees remain fully to partially leaved across this region, low risk for down branches and isolated power outages.

SHORT TERM /SATURDAY/. Tonight .

Clearing skies with diminishing wind as strong high pres builds in from the west. Coldest night of the season with lows ranging from upper teens to mid 20s, except low/mid 30s outer Cape and ACK where winds will be a bit stronger.

Saturday .

High pres builds over New Eng with sunshine and light winds. Overall, a nice fall day although a bit chilly with highs in the 40s.

LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/. Highlights .

* Big temperature swings coming in the extended forecast. Warmer on Sunday then a good cooldown Mon/Tue before we warm back up late week.

* Periodic rain/snow chances Sunday through early Tuesday

Details .

Prepare for a bit of a temperature roller coaster in the latter portion of the forecast. After Fri/Sat's big chill, warmer air surges north on Sunday before crashing back well below normal Mon/Tue and then once again surging above normal by Thursday.

By Saturday night temperatures will still be quite cold, in the upper 20s and 30s, but warmer relative to Friday night thanks to light southerly flow in the lower levels. In addition to the milder air this return flow will bring increasing moisture and cloudcover, from south to north through the night. This will also help to keep things a bit warmer than otherwise.

The surge of moisture and warm air advection (WAA) comes as a warm front lifts north associated with a trough of low pressure crossing the Great Lakes on Sunday. WAA and moisture transport together with a mid level vort max will bring rain chances Sunday into Monday. Currently the swath of heaviest rain looks to fall in the vicinity of southeast MA late Sunday into early Monday, but at this range details should be taken with a large grain of salt. Once the cold front does finally drop through, it will usher in a much cooler airmass for Monday and Tuesday. Though the magnitude of the 850 mb cold looks to be a bit less in the latest model runs, we're still talking about anomalous cold (with wind!). We'll start the week with highs in the 30s/40s and lows in the 20s Mon and Tuesday nights. The CAA aloft will promote good mixing down of a low level jet leading to gusty winds as early as Sunday, peaking on Monday, and lingering Tuesday. This will make it feel more like the 20s and 30s on Monday instead of the 30s and 40s.

Finally a subsequent, weak disturbance may rotate through late Monday into early Tuesday bringing scattered light rain and snow showers before high pressure builds back in bringing dry weather through late next week. The main story will be anomalously warm temperatures late week under a building ridge.

AVIATION /14Z FRIDAY THROUGH TUESDAY/. Forecaster Confidence Levels .

Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent.

12Z update .

Today . High confidence.

A period of moderate to heavy snow continues this morning from NE CT through northern RI and the I-95 corridor. Vsbys down to 1/2 mile or less. Rain changes to a brief period of snow across SE MA to the south coast 14-18z with vsbys briefly down to 1 mile. Precip remains rain over Cape/Islands. Improving conditions from NW to SE 18-00z as precip exits with VFR and partial clearing developing in the interior. N/NE gusts to 40 kt Cape/Islands and 20-30 kt elsewhere, gradually diminishing in the afternoon.

Tonight and Saturday . High confidence.

Areas of MVFR cigs early Cape/Islands, otherwise VFR with clearing skies. Gusty winds diminishing Cape/Islands, otherwise light winds.

Saturday . High confidence. VFR. Light winds.

KBOS TAF . High confidence in TAF trends. Uncertainty in exact timing. A period of moderate to brief heavy snow possible 13-18z. Snowfall 1-2 inches possible, runways will likely become snow covered.

KBDL TAF . High confidence in TAF trends. Uncertainty in exact timing. A period of moderate snow 12z-16z. Snowfall around an inch possible, with just a coating likely on runways.

Outlook /Saturday Night through Tuesday/ .

Saturday Night: Mainly VFR, with local MVFR possible. Breezy. Slight chance SHRA, slight chance FZRA.

Sunday: Mainly VFR, with areas MVFR possible. Windy with gusts up to 35 kt. Chance SHRA.

Sunday Night: Mainly VFR, with local MVFR possible. Windy with local gusts up to 30 kt. Chance SHRA.

Monday: VFR. Strong winds with local gusts up to 40 kt.

Monday Night: VFR. Windy with gusts up to 35 kt. Slight chance SHSN.

Tuesday: VFR. Windy with gusts up to 35 kt.

MARINE. Gale warnings continue for all waters. NE winds gusting to 30-40 kt with higher gusts over southern waters. Winds diminishing this afternoon and becoming light tonight into Saturday. Rough seas subsiding through tonight and Sat. Vsbys reduced in rain and fog today.

Outlook /Saturday Night through Tuesday/ .

Saturday Night: Winds less than 25 kt. Seas up to 5 ft. Slight chance of rain showers.

Sunday: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Areas of rough seas. Rain showers likely.

Sunday Night: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Rough seas up to 9 ft. Slight chance of rain showers.

Monday: Moderate risk for gale force winds with gusts up to 40 kt. Rough seas up to 10 ft. Slight chance of rain showers.

Monday Night: Low risk for gale force winds with gusts up to 40 kt. Rough seas up to 11 ft. Chance of rain showers.

Tuesday: Low risk for gale force winds with gusts up to 40 kt. Rough seas up to 11 ft. Slight chance of rain showers.

BOX WATCHES/WARNINGS/ADVISORIES. CT . Winter Weather Advisory until 1 PM EDT this afternoon for CTZ002>004. MA . Wind Advisory until 2 PM EDT this afternoon for MAZ022>024. Winter Weather Advisory until 2 PM EDT this afternoon for MAZ013-014. Winter Weather Advisory until 1 PM EDT this afternoon for MAZ002>005-008>012-026. RI . Wind Advisory until 2 PM EDT this afternoon for RIZ008. Winter Weather Advisory until 1 PM EDT this afternoon for RIZ001. MARINE . Gale Warning until 8 PM EDT this evening for ANZ232-254>256. Gale Warning until 5 PM EDT this afternoon for ANZ233>235-237. Gale Warning until 11 AM EDT this morning for ANZ230-236. Gale Warning until 4 PM EDT this afternoon for ANZ231. Gale Warning until 2 PM EDT this afternoon for ANZ250-251.

SYNOPSIS . KJC/BW NEAR TERM . KJC/BW/Nash SHORT TERM . KJC LONG TERM . BW AVIATION . KJC/BW MARINE . KJC/BW


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BZBM3 - 8447930 - Woods Hole, MA 14 mi58 min 41°F 58°F1007.7 hPa
FRVM3 - 8447386 - Fall River, MA 16 mi58 min 36°F 1010.8 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 17 mi58 min N 13 G 19 36°F 1010.4 hPa
FRXM3 17 mi58 min 35°F 35°F
WAXM3 - Waquoit Bay Reserve, MA 19 mi73 min NW 5.1 47°F 1008 hPa47°F
BUZM3 - Buzzards Bay, MA 21 mi58 min N 29 G 35 1008.4 hPa (+2.5)
PRUR1 24 mi58 min 34°F 34°F
NAXR1 - Narragansett Bay Reserve, RI 25 mi73 min NNE 19 37°F 1010 hPa37°F
CPTR1 - 8452944 - Conimicut Light, RI 26 mi58 min NW 21 G 26 35°F 58°F1009.8 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 26 mi58 min NNE 15 G 21 35°F 1010.8 hPa
NWPR1 - 8452660 - Newport, RI 27 mi58 min N 18 G 28 36°F 57°F1009.6 hPa
PVDR1 29 mi58 min N 14 G 20 33°F 1010.7 hPa33°F
FOXR1 - 8454000 - Providence, RI 30 mi58 min NE 9.9 G 17 34°F 58°F1010.7 hPa
44090 30 mi31 min 56°F8 ft
QPTR1 - 8454049 - Quonset Point, RI 30 mi58 min N 19 G 23 34°F 57°F1009.9 hPa
44020 - NANTUCKET SOUND 33 mi38 min NNE 29 G 39 59°F
BHBM3 - 8443970 - Boston, MA 48 mi58 min 32°F 55°F1010.9 hPa
CHTM3 48 mi58 min NE 28 G 39 45°F 52°F1007.2 hPa
NTKM3 - 8449130 - Nantucket Island, MA 48 mi58 min NNE 19 G 28 46°F 55°F1006 hPa
44013 - BOSTON 16 NM East of Boston, MA 48 mi38 min NNE 25 G 31 39°F 54°F1011.3 hPa38°F

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
New Bedford, New Bedford Regional Airport, MA6 mi65 minN 10 G 171.50 miLight Snow Fog/Mist34°F34°F100%1008.9 hPa
Taunton, Taunton Municipal Airport, MA17 mi66 minN 90.50 miSnow Fog34°F32°F92%1010 hPa
Otis Air National Guard Base, MA18 mi73 minNNE 21 G 303.00 miLight Rain Fog/Mist and Breezy39°F37°F93%1008.1 hPa
Plymouth, Plymouth Municipal Airport, MA18 mi66 minN 18 G 305.00 miRain Fog/Mist and Breezy38°F35°F89%1009.6 hPa
Marthas Vineyard Airport, MA22 mi65 minNNE 24 G 333.00 miRain Fog/Mist and Windy42°F39°F89%1006.5 hPa
Newport, Newport State Airport, RI24 mi65 minN 14 G 250.50 miSnow Fog33°F32°F96%1009.4 hPa

Link to 5 minute data for KEWB

Wind History from EWB (wind in knots)
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Last 24hrE3S3CalmN3N3NE6NE7NE9
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1 day agoE3SE7SE5E5E4N33NW4NW4NW6NW6CalmCalmCalmW4CalmCalmCalmCalmCalmCalmCalmCalmNE3
2 days agoNW9N55W96N43CalmCalmCalmCalmW3CalmS3N3NE5N4CalmCalmNE3NE3NE4E4E5

Tide / Current Tables for Mattapoisett, Mattapoisett Harbor, Buzzards Bay, Massachusetts
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Mattapoisett
Click for Map
Fri -- 01:12 AM EDT     0.22 feet Low Tide
Fri -- 06:02 AM EDT     Moonset
Fri -- 07:13 AM EDT     Sunrise
Fri -- 07:45 AM EDT     4.60 feet High Tide
Fri -- 01:44 PM EDT     0.23 feet Low Tide
Fri -- 05:34 PM EDT     Moonrise
Fri -- 05:39 PM EDT     Sunset
Fri -- 08:03 PM EDT     4.16 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.20.30.71.52.53.64.44.642.91.70.80.30.20.511.92.93.84.23.82.91.7

Tide / Current Tables for Woods Hole, Massachusetts Current (use with caution)
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Woods Hole
Click for Map
Fri -- 12:41 AM EDT     -3.45 knots Max Ebb
Fri -- 04:43 AM EDT     0.01 knots Slack
Fri -- 06:01 AM EDT     Moonset
Fri -- 07:12 AM EDT     Sunrise
Fri -- 08:06 AM EDT     3.72 knots Max Flood
Fri -- 10:40 AM EDT     -0.00 knots Slack
Fri -- 01:04 PM EDT     -3.47 knots Max Ebb
Fri -- 05:02 PM EDT     0.18 knots Slack
Fri -- 05:34 PM EDT     Moonrise
Fri -- 05:39 PM EDT     Sunset
Fri -- 08:25 PM EDT     3.65 knots Max Flood
Fri -- 10:58 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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-3.3-3.4-3.1-2.5-1.71.22.63.43.73.52.4-1.6-3.1-3.5-3.3-2.7-2-0.42.23.13.63.62.8-0.4

Weather Map
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GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
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 numerous 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.