Thursday, September19, 2019 L-36.com


Marine Weather and Tides
Harwich Port, MA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:23AMSunset 6:45PM Thursday September 19, 2019 3:04 PM EDT (19:04 UTC) Moonrise 9:47PMMoonset 11:28AM Illumination 69% 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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ANZ232 Nantucket Sound- 116 Pm Edt Thu Sep 19 2019
This afternoon..NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft.
Tonight..NE winds 5 to 10 kt, becoming nw after midnight. Seas around 3 ft.
Fri..W winds 5 to 10 kt. Seas around 3 ft.
Fri night..W winds 5 to 10 kt. Seas around 4 ft.
Sat..NW winds 5 to 10 kt, becoming sw in the afternoon. Seas 2 to 3 ft.
Sat night..S winds around 5 kt. Seas 1 foot or less.
Sun..S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon.
Sun night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Mon..SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas around 3 ft.
Mon night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. A chance of showers. 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 Thu Sep 19 2019
Synopsis for massachusetts and rhode island coastal waters.. High pres builds slowly S across the waters today, then builds S of the waters Fri through Sun. Meanwhile E swell from distant hurricane humberto will impact the waters during the next 24 to 48 hours. 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 Harwich Port, MA
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location: 41.57, -70.05     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 191735
afdbox
area forecast discussion
national weather service boston norton ma
135 pm edt Thu sep 19 2019

Synopsis
High pressure lingers over our region through early next week.

Below normal temperatures late this week will trend to above
normal temperatures over this weekend and early next week. A
cold front brings the next chance of showers early next week.

Distant hurricane humberto will bring high surf and dangerous
rip currents late this week, which should peak on Friday.

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

high pres overhead will bring abundant sunshine and light N ne
winds with sea breezes developing along east coastal ma. 12z
soundings tell the story with very dry air throughout the column
and pwats near 0.25". Temperatures will remain below normal,
generally mid 60s to near 70, but cooler along the immediate
coast.

East-southeast swell from hurricane humberto will continue to
impact the coastline of southern new england. Rough surf and
dangerous rip currents will affect ocean-exposed beaches.

Swimming is not recommended, nor is walking out on low-lying
piers or jetties. High surf advisories will continue.

Short term 6 pm this evening through 6 pm Friday
Dry weather continues through Friday. Swell from humberto will
also continue the threat for rough surf and dangerous rip currents.

With warming conditions Friday, will continue the high surf advisory
through much of Friday along ocean-exposed portions of the coast.

Long term Friday night through Wednesday
* highlights...

- lingering high surf, dangerous rip currents Saturday
- warm weekend, anticipating fantastic weather
- mild days, cool nights the following week
- two shots at wet weather around Monday night and Thursday night
* overview...

biggest concern: weekend lingering swell from humberto during which
the weather will be fantastic and beaches unguarded. High surf and
dangerous rip currents pose a threat to life, especially Saturday
during which beach hazard statements will likely be needed. Those
interested in observing the surf should do so from a safe distance.

Swimming is not recommended.

Otherwise: mostly mild, dry long-range forecast. Continued ensemble-
weighted +wpo +epo -pna +ao +nao teleconnections with a phase 8 to 1
mjo. Signals pointing towards warmer than average E CONUS conditions
ahead of preferred W CONUS troughing. But there's some hope we will
see some rain that'll wash out all the airborne allergens. Upstream
n pacific pattern amplifying, buckling, potentially cutting off w
conus troughing, energy cascades E along with continental-tropical
airmasses. So long as N atlantic higher heights do not suppress the
environment given an active tropical pattern and subsequent latent
heat release, we could see some decent shots of much needed rain,
the first around Monday night with a second around Thursday night.

Associated mid-level disturbances and accompanying jet dynamics in
concert with sweeping cold fronts, while specifics remain uncertain
far out in time, any rainfall is welcoming.

Aside from the weekend which is looking rather warm, most locations
in the 80s well-above normal highs around the low 70s, looking at a
trend of mild days and cool nights. Some uncertainty as to whether
the upstream pattern reloads (preferred W CONUS troughing) acting to
buckle colder air n. Aside, there's the possibility the following
weekend that we could see our first shot of cool canadian air right
on time with the start of autumn. Continued preference of ensembles
given pattern uncertainty and recent deterministic adjustments to
wetter outcomes through next week.

Aviation 18z Thursday through Tuesday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday ... High confidence.

Vfr through the period. Diminishing NE wind this afternoon
cape islands.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Saturday through Monday ...

Saturday through Saturday night:VFR.

Sunday through Sunday night:VFR. Breezy.

Monday:VFR. Breezy. Chance shra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday ... High confidence.

High pressure centered over new england. N to NE winds will
continue to diminish through today, then become light W to nw
tonight into Friday. E swell from hurricane humberto will build
through the day, with swell up to around 7 feet forecast by
tonight into Friday. Rough seas will require small craft
advisories to continue across the outer coastal waters through
Friday.

Outlook Friday night through Monday ... Moderate confidence.

Friday night: winds less than 25 kt. Areas of rough seas.

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

Saturday night through Sunday: winds less than 25 kt.

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

Monday: low risk for small craft advisory winds with gusts up
to 25 kt. Seas up to 5 ft. Chance of rain showers.

Box watches warnings advisories
Ct... None.

Ma... High surf advisory until 6 pm edt Friday for maz020-022>024.

High surf advisory from midnight tonight to 6 pm edt Friday
for maz007-019.

Ri... High surf advisory until 6 pm edt Friday for riz006>008.

Marine... Small craft advisory until 2 am edt Saturday for anz250-
254>256.

Small craft advisory from 6 am Friday to 2 am edt Saturday for
anz251.

Synopsis... Belk sipprell
near term... Belk kjc
short term... Belk
long term... Sipprell
aviation... Kjc sipprell
marine... Belk sipprell


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44020 - NANTUCKET SOUND 13 mi34 min NNE 12 G 16 61°F 67°F48°F
NTKM3 - 8449130 - Nantucket Island, MA 20 mi52 min NE 11 G 15 63°F 64°F1025.8 hPa
44090 24 mi34 min 63°F1 ft
WAXM3 - Waquoit Bay Reserve, MA 25 mi79 min NW 2.9 64°F 1026 hPa47°F
BZBM3 - 8447930 - Woods Hole, MA 33 mi52 min 65°F 67°F1026.1 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 44 mi74 min NNE 7.8 G 9.7 59°F 4 ft1026.7 hPa (-0.6)41°F

Wind History for Nantucket Island, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chatham, Chatham Municipal Airport, MA10 mi72 minNE 7 G 1510.00 miFair64°F46°F52%1026.6 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA14 mi68 minNNE 1210.00 miFair65°F46°F51%1025.9 hPa
Nantucket, Nantucket Memorial Airport, MA21 mi71 minN 16 G 2110.00 miFair64°F46°F54%1025.9 hPa

Link to 5 minute data for KCQX

Wind History from CQX (wind in knots)
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1 day ago6NE6NE8NE7NE5NE6CalmNE6NE6NE6NE84NE7NE9NE7NE6NE7E9E11
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2 days agoNE85E5CalmCalmCalmCalmCalmCalmCalmCalmNW3CalmCalmCalmCalm3353NE9NE10
G15
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NE8

Tide / Current Tables for Monomoy Point, Cape Cod, Massachusetts
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Monomoy Point
Click for Map
Thu -- 03:51 AM EDT     3.63 feet High Tide
Thu -- 06:24 AM EDT     Sunrise
Thu -- 09:48 AM EDT     0.41 feet Low Tide
Thu -- 11:28 AM EDT     Moonset
Thu -- 04:05 PM EDT     3.81 feet High Tide
Thu -- 06:42 PM EDT     Sunset
Thu -- 09:46 PM EDT     Moonrise
Thu -- 10:17 PM EDT     0.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.52.32.93.53.63.32.71.91.10.60.40.81.52.333.63.83.632.21.40.70.30.4

Tide / Current Tables for Pollock Rip Channel, Massachusetts Current
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Pollock Rip Channel
Click for Map
Thu -- 01:24 AM EDT     -0.00 knots Slack
Thu -- 04:01 AM EDT     -1.78 knots Max Ebb
Thu -- 06:24 AM EDT     Sunrise
Thu -- 07:06 AM EDT     0.00 knots Slack
Thu -- 10:15 AM EDT     1.89 knots Max Flood
Thu -- 11:27 AM EDT     Moonset
Thu -- 01:42 PM EDT     -0.00 knots Slack
Thu -- 04:21 PM EDT     -1.78 knots Max Ebb
Thu -- 06:42 PM EDT     Sunset
Thu -- 07:26 PM EDT     0.00 knots Slack
Thu -- 09:46 PM EDT     Moonrise
Thu -- 10:38 PM EDT     1.92 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.30.4-0.6-1.5-1.8-1.5-0.9-0.10.81.51.91.81.40.7-0.3-1.2-1.7-1.7-1.2-0.40.51.31.81.9

Weather Map
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wmap_A
GEOS Local Image of Northeast    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 (15,3,4,5)
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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.