Friday, June23, 2017 L-36.com


Marine Weather and Tides
Sagamore, MA

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 5:05AMSunset 8:21PM Friday June 23, 2017 2:59 PM EDT (18:59 UTC) Moonrise 4:50AMMoonset 7:50PM 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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ANZ231 Cape Cod Bay- 116 Pm Edt Fri Jun 23 2017
.small craft advisory in effect through Saturday morning...
This afternoon..S winds 15 to 20 kt with gusts up to 25 kt. Seas around 2 ft. A slight chance of showers with isolated tstms. Some tstms may produce heavy rainfall.
Tonight..SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Areas of fog. Scattered showers. Vsby 1 nm or less.
Sat..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Areas of fog. Scattered tstms with a chance of showers. Some tstms may produce heavy rainfall. Vsby 1 nm or less.
Sat night..W winds 5 to 10 kt. Seas around 2 ft.
Sun..W winds 5 to 10 kt, becoming sw 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less.
Sun night..SW winds 10 to 15 kt, becoming W 5 to 10 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..S 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 116 Pm 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 sweep across the waters around Saturday morning, clearing out late in the day ahead of a sweeping cool front. Lower visibilities 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 Sagamore, MA
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location: 41.83, -70.55     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 231823
afdbox
area forecast discussion
national weather service taunton ma
223 pm 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
230 pm update...

clearing skies early this morning has resulted in CAPE values
increasing sb CAPE to over 2000 j kg. This combined with shear
values of 30-35 kts and low level lapse rates near 8 c km has
resulted in a few scattered showers. Dynamics and SPC meso
analysis indicates that the main risk could be heavy rain and
gusty winds. Skinny CAPE and inverted v soundings would also
indicate the potential for wet microburst. While most of the
region will remain dry this afternoon, the risk for isolated
showers will continue through the evening.

Best location for the stronger storm is along a surface
convergence with bvy out of the southeast and kbed from the
south southwest. Also 850 mb LLJ is gusting to near 30 kts which
will help sustain updrafts. More micro-scale phenomenas may be
setting up resulting which may help keep these storms around
but believe the potential for a strong to severe storms will be
limited.

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 18z Friday through Wednesday
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...

vfr for most of the region with iso MVFR within any shower tsra.

Stratus and fog will overspread the south coast closer to
sunset.

Tonight into Saturday...

MVFR-lifr CIGS with MVFR-ifr vsbys with br fg. Scattered shra tsra
tonight approaching from the west, with more widespread
potential Saturday morning. Improving conditions from west to
east 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... High confidence.VFR today with gusty SW winds
up to 25 kts, lower CIGS into this evening with increasing
rain thunder chances.

Kbdl terminal...VFR 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 ...

1000 am update... Went ahead an issued a SCA for bos harbor and
narragansett bay. Winds gusts of 25 kts are possible during the
later half of the day.

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 until 11 am edt Saturday for anz231>234-
250.

Small craft advisory until 9 pm edt this evening for anz230-
236.

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

Small craft advisory until 8 pm edt Saturday for anz254>256.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 12 mi55 min 63°F1 ft
WAXM3 - Waquoit Bay Reserve, MA 17 mi74 min 2.9 77°F 1009 hPa71°F
BZBM3 - 8447930 - Woods Hole, MA 22 mi41 min 70°F 67°F1008.1 hPa
44020 - NANTUCKET SOUND 33 mi69 min 66°F2 ft1008.1 hPa (-1.9)
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 34 mi41 min SSW 18 G 22 77°F 1005.8 hPa
FRVM3 - 8447386 - Fall River, MA 34 mi41 min 80°F 73°F1007.5 hPa
FRXM3 35 mi47 min 80°F 71°F
44013 - BOSTON 16 NM East of Boston, MA 36 mi69 min SSE 14 G 16 66°F 60°F1 ft1005.5 hPa (-2.7)
BUZM3 - Buzzards Bay, MA 39 mi59 min SSW 18 G 19 66°F 1008.1 hPa (-2.0)
CPTR1 - 8452944 - Conimicut Light, RI 43 mi41 min S 21 G 23 74°F 71°F1006.2 hPa
NAXR1 - Narragansett Bay Reserve, RI 44 mi74 min SSW 7 76°F 1007 hPa71°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 44 mi41 min SSW 5.1 G 11 75°F 1006.6 hPa
PVDR1 44 mi41 min SSE 19 G 22 76°F 1005.7 hPa72°F
FOXR1 - 8454000 - Providence, RI 45 mi41 min S 17 G 21 79°F 71°F1005.3 hPa
NTKM3 - 8449130 - Nantucket Island, MA 45 mi41 min SSW 8 G 18 71°F 69°F1008.9 hPa
BHBM3 - 8443970 - Boston, MA 45 mi41 min 85°F 1003.6 hPa
NWPR1 - 8452660 - Newport, RI 47 mi41 min S 13 G 17 70°F 65°F1007.3 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 48 mi115 min SSE 7.8 G 7.8 64°F 61°F1 ft1005.9 hPa
QPTR1 - 8454049 - Quonset Point, RI 48 mi41 min S 17 G 20

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Plymouth, Plymouth Municipal Airport, MA11 mi67 minS 11 G 1810.00 miFair84°F70°F63%1006.9 hPa
Otis Air National Guard Base, MA12 mi64 minSSW 1510.00 miA Few Clouds82°F73°F74%1008.1 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA18 mi63 minSSW 117.00 miFair74°F68°F82%1008 hPa
Marshfield Airport, MA20 mi84 minSSW 12 G 1910.00 miPartly Cloudy90°F71°F55%1006.1 hPa
Provincetown Municipal Airport, MA22 mi63 minS 1410.00 miFair78°F69°F74%1007.4 hPa
New Bedford, New Bedford Regional Airport, MA24 mi66 minSSW 15 G 2010.00 miFair82°F71°F69%1007 hPa

Wind History from PYM (wind in knots)
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1 day agoW21
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SW10SW8SW5W3CalmCalmNW4CalmW3CalmCalmCalmW8W5W4CalmW65NW5W5
2 days agoSW17
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SW8SW6S3S3S3CalmCalmSE4CalmCalmS3SW6S8SW11
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Tide / Current Tables for Cape Cod Canal, Bournedale, Massachusetts
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Cape Cod Canal
Click for Map
Fri -- 04:41 AM EDT     -1.02 feet Low Tide
Fri -- 04:51 AM EDT     Moonrise
Fri -- 05:08 AM EDT     Sunrise
Fri -- 10:45 AM EDT     6.97 feet High Tide
Fri -- 04:55 PM EDT     -0.43 feet Low Tide
Fri -- 07:49 PM EDT     Moonset
Fri -- 08:20 PM EDT     Sunset
Fri -- 10:32 PM EDT     New Moon
Fri -- 11:00 PM EDT     8.11 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.34.52.60.7-0.7-101.63.55.46.76.96.353.31.50.1-0.40.32467.58.1

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Fri -- 03:03 AM EDT     0.22 knots Slack
Fri -- 04:51 AM EDT     Moonrise
Fri -- 05:08 AM EDT     Sunrise
Fri -- 06:09 AM EDT     4.72 knots Max Flood
Fri -- 09:34 AM EDT     -0.22 knots Slack
Fri -- 12:23 PM EDT     -4.76 knots Max Ebb
Fri -- 03:26 PM EDT     0.21 knots Slack
Fri -- 06:27 PM EDT     4.61 knots Max Flood
Fri -- 07:49 PM EDT     Moonset
Fri -- 08:21 PM EDT     Sunset
Fri -- 09:43 PM EDT     -0.12 knots Slack
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
-4.9-4.5-3.4-0.83.24.34.74.53.92.5-2.3-4-4.7-4.6-3.8-2.22.53.94.54.542.8-1.8-3.9

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

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Boston, MA (14,3,4,5)
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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.