Tuesday, August20, 2019 L-36.com


Marine Weather and Tides
Revere, MA

Version 3.4
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Sunrise 5:54AMSunset 7:40PM Tuesday August 20, 2019 8:23 PM EDT (00:23 UTC) Moonrise 10:19PMMoonset 10:36AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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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ANZ230 Boston Harbor- 716 Pm Edt Tue Aug 20 2019
Tonight..S winds 5 to 10 kt. Waves 1 foot or less.
Wed..S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers and tstms.
Wed night..SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers and tstms.
Thu..SW winds around 10 kt. Waves 1 foot or less.
Thu night through Fri night..NW winds 5 to 10 kt. Waves 1 foot or less.
Sat through Sun..NE winds 5 to 10 kt. Waves 1 foot or less. Winds and waves 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 Pm Edt Tue Aug 20 2019
Synopsis for massachusetts and rhode island coastal waters.. A warm front will move north late tonight and Wednesday morning and to draw warm and very humid air over the waters. This will bring patchy fog as well as showers and scattered Thunderstorms Wednesday through Thursday. A cold front then sweeps across the waters sometime Thursday night into early Friday morning afterwhich dry weather and good vsby follows for Friday into the weekend. 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 Revere, MA
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location: 42.44, -71.01     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 202252
afdbox
area forecast discussion
national weather service boston norton ma
652 pm edt Tue aug 20 2019

Synopsis
High pressure over southern new england moves offshore tonight
providing seasonable dry weather. A warm front moves across the
region Wednesday providing scattered showers and thunderstorms along
with increasing heat and humidity. A cold front Thursday will bring
another round of scattered showers and thunderstorms. The front
moves offshore Friday with dry weather to follow into the weekend
with mild days and cool nights along with comfortable humidity.

Near term until 6 am Wednesday morning
650 pm update...

quiet evening with just a few high clouds moving across the
region. Dry airmass with dewpoints in the 50s and light winds
will allow for decent radiational cooling after sunset, then
temps stabilize overnight as clouds increase and higher
dewpoints begin to move in. Cooler MOS guid followed for this
evening. Low risk for some elevated convection toward sunrise
along the south coast of ma ri and over western ma ct as warm
front aloft surges northeastward.

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

very complex forecast especially afternoon convection and severity.

Warm front lifts northward into the region Wed morning. Some of the
guidance suggest an active warm front with lots of showers t-storms.

If this verifies lots of cloud debris would linger into the
afternoon and could suppress afternoon convection. In addition lots
of morning convection could delay warm frontal passage and thus
diminish risk of strong afternoon storms.

Conversely some of the guidance does not have much if any warm
frontal precip during the morning followed by warm sector
overspreading southern new england with 12z href and ec offering up
to 2500 j kg of sb cape. Thus robust warm sector combined with up to
30 kt of deep layer shear. These high CAPE and modest shear profiles
combined with forcing for ascent from short wave trough moving from
ny to vt nh would support a low to moderate risk of strong to severe
storms. However this convective forecast will hinge on warm frontal
morning convection and how quickly warm sector can overspread
ma ri ct. Some morning warm frontal convection could enhance diurnal
storms with leftover boundaries along with differential heating from
leftover cloud debris. So overall lots of uncertainty regarding
severe potential tomorrow. Hopefully 00z runs show a trend.

Otherwise gradually becoming more humid tomorrow especially if warm
front lifts north of the area.

Long term Thursday through Tuesday
Highlights...

* hot and humid Thu with a risk for a few showers t-storms near and
south of the pike, shifting to the south coast Thu night
* cooler and less humid fri
* pleasantly warm days and cool nights this weekend into early next
week
details...

Thursday into Thursday night...

another robust mid level shortwave will be rotating across the great
lakes with downstream SW flow aloft across new eng. Cold front moves
into the interior Thu but slows and eventually gets hung up near the
south coast Thu evening. Models show some drier air aloft moving
into sne Thu morning before moisture gradually deepens later Thu thu
evening, especially south of the pike. It will be a hot and humid
day with partly to mostly sunny skies. 925 mb temps 22-24c support
highs around 90, except cooler near the south coast and higher
terrain in ma. Dewpoints lower 70s in the coastal plain but falling
through the 60s interior behind the front.

Marginal instability develops Thu with forecast capes around 1000
j kg, focused south of the pike. Models are not very bullish on
convective precip, likely due to presence of mid level dry air which
may limit convective activity during the day. Best chance for a few
afternoon t-storms will likely be near and south of the pike ahead
of the front, and there is enough deep layer shear for an isolated
strong to severe storm. While instability diminishes after dark,
better chance for showers and a few t-storms may be Thu night along
the south coast as deeper moisture with pwat plume nearing 2 inches
moves up along the south coast ahead of a shortwave and along the
stalled frontal boundary which eventually pushes south and offshore
by late Thu night.

Friday...

there is some uncertainty regarding how quickly clearing occurs near
the south coast. It is possible clouds may linger into Fri near the
south coast with a risk of a few showers. Otherwise, more sunshine
likely north of the pike. Cooler post frontal airmass will yield
highs mainly mid 70s to around 80 with low humidity.

Saturday through Tuesday...

ecmwf appears to be an outlier with development of closed low over
new eng this weekend into early next week and not really supported
by majority of its ensemble members. Trend is for mid level ridging
to develop across the NE late in the weekend into early next week,
with shower threat possibly increasing by Tue depending on timing of
next shortwave. Coolest days likely Sun Mon with high pres in the
maritimes with NE flow and will have to watch for some lower clouds
during this time period. Overall, looking at highs mostly in the 70s
and lows in the 50s this weekend into early next week, with highs in
the 60s possible along the east coast Sun mon.

Aviation 00z Wednesday through Sunday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday night ... Moderate confidence.

00z update ... No changes
tonight ... VFR, dry weather and light s-se winds near shore
with light and variable inland.VFR-MVFR toward daybreak along
with the risk of isolated shower t-storm western ct ma.

Wednesday ...

vfr-MVFR in scattered showers t-storms throughout the day. S-se
winds becoming s-sw late. A few strong storms possible with
gusty winds, frequent lightning and torrential downpours.

Greatest risk western ct into NW ma.

Wed night ...

MVFR-vfr with chance of showers t-storms especially early in the
evening. S-sw winds increasing up to 20-25 kt over CAPE cod and
islands.

Kbos terminal... High confidence in TAF thru tonight. Then
uncertainty Wed on timing and areal coverage of
showers t-storms along with uncertainty on wind shift from SE to
sw, likely occurring late in the day wed.

Kbdl terminal... High confidence in TAF thru this evening. Then
uncertainty on timing and areal coverage of showers t-storms
late tonight into wed.

Outlook Thursday through Sunday ... Moderate confidence
Thursday: mainlyVFR, with areas MVFR possible. Slight chance
shra, slight chance tsra.

Thursday night: mainlyVFR, with local MVFR possible. Slight
chance shra.

Friday through Sunday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday night ... High confidence.

4 pm update...

tonight ... Tranquil weather with 1020 mb high over pa drifting
eastward. Dry weather and good vsby expected along with tranquil
seas.

Wednesday ... Warm front lifts into the waters with scattered showers
and t-storms. Low prob for a few strong storms.

Wednesday night ... Warm front lifts north into nh me waters with
evening scattered showers t-storms possible. Patchy fog
possible.

Outlook Thursday through Sunday ... Moderate confidence.

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

Slight chance of rain showers, slight chance of thunderstorms.

Thursday night: winds less than 25 kt. Seas locally approaching
5 ft. Chance of rain showers, chance of thunderstorms.

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

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

Saturday night: winds less than 25 kt.

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

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Kjc nocera
near term... Kjc nocera
short term... Nocera
long term... Kjc
aviation... Kjc nocera
marine... Kjc nocera


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 6 mi96 min 75°F 1017.2 hPa
44013 - BOSTON 16 NM East of Boston, MA 20 mi34 min 71°F 71°F1 ft1015.8 hPa (-0.5)
44029 - Buoy A0102 - Mass. Bay/Stellwagen 24 mi80 min SE 7.8 G 9.7 70°F 68°F1 ft1016.8 hPa
IOSN3 - Isle of Shoals, NH 42 mi84 min S 15 G 16 71°F 1016.3 hPa (-0.8)64°F
BGXN3 - Great Bay Reserve, NH 44 mi99 min ESE 1.9 77°F 1017 hPa59°F
44073 47 mi140 min SSE 7.8 G 9.7 70°F
FOXR1 - 8454000 - Providence, RI 48 mi54 min W 2.9 G 5.1 84°F 75°F1016.7 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 49 mi34 min SE 7.8 G 7.8 69°F 2 ft1017.6 hPa (-0.4)67°F
PVDR1 49 mi54 min WSW 4.1 G 4.1 83°F 1017.2 hPa56°F

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA4 mi90 minENE 710.00 miMostly Cloudy73°F64°F74%1017 hPa
Beverly, Beverly Municipal Airport, MA11 mi91 minSE 410.00 miFair73°F62°F69%1016.5 hPa
Laurence G Hanscom Field Airport, MA15 mi88 minESE 510.00 miFair82°F60°F47%1017.6 hPa
East Milton, MA17 mi88 minWSW 6 mi80°F55°F44%1018.1 hPa
Norwood, Norwood Memorial Airport, MA19 mi91 minWSW 510.00 miFair86°F55°F36%1016.8 hPa
Lawrence Municipal Airport, MA21 mi90 minVar 410.00 miFair78°F61°F56%1017.3 hPa

Link to 5 minute data for KBOS

Wind History from BOS (wind in knots)
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SW8----------W5W5--NW7NW10NW9--3SE7SE9E11E9E12E12E10E7
1 day agoE6Calm4----S4--S7----SW4SW7SW9SW10SW13--SW13
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2 days agoE11SE8SE5E54
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Tide / Current Tables for Lynn Harbor, Massachusetts
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Lynn Harbor
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Tue -- 03:07 AM EDT     9.27 feet High Tide
Tue -- 05:55 AM EDT     Sunrise
Tue -- 09:14 AM EDT     0.65 feet Low Tide
Tue -- 10:36 AM EDT     Moonset
Tue -- 03:30 PM EDT     9.10 feet High Tide
Tue -- 07:38 PM EDT     Sunset
Tue -- 09:35 PM EDT     0.96 feet Low Tide
Tue -- 10:18 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.178.69.38.87.45.53.51.70.71.12.54.36.27.98.997.96.24.32.51.21.12.2

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
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Tue -- 02:32 AM EDT     -0.00 knots Slack
Tue -- 05:50 AM EDT     -0.99 knots Max Ebb
Tue -- 05:56 AM EDT     Sunrise
Tue -- 09:15 AM EDT     0.00 knots Slack
Tue -- 10:36 AM EDT     Moonset
Tue -- 11:21 AM EDT     1.18 knots Max Flood
Tue -- 02:56 PM EDT     -0.00 knots Slack
Tue -- 06:13 PM EDT     -1.02 knots Max Ebb
Tue -- 07:37 PM EDT     Sunset
Tue -- 09:42 PM EDT     0.00 knots Slack
Tue -- 10:18 PM EDT     Moonrise
Tue -- 11:43 PM EDT     1.10 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.90.4-0.3-0.7-0.9-1-0.9-0.8-0.20.71.21.110.6-0-0.6-0.9-1-1-0.9-0.60.31

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 (20,4,5,8)
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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.