Friday, March22, 2019 L-36.com


Marine Weather and Tides
Orleans, MA

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 6:39AMSunset 6:56PM Friday March 22, 2019 8:27 PM EDT (00:27 UTC) Moonrise 8:59PMMoonset 7:54AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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
    EDIT      (on/off)   Help
ANZ254 Coastal Waters From Provincetown Ma To Chatham Ma To Nantucket Ma Out 20 Nm- 716 Pm Edt Fri Mar 22 2019
.gale warning in effect through Saturday evening...
Tonight..W winds 20 to 25 kt, increasing to 25 to 30 kt after midnight. Gusts up to 40 kt. Seas 8 to 11 ft. A chance of showers this evening, then showers likely with snow showers after midnight. Patchy fog after midnight with vsby 1 to 3 nm.
Sat..W winds 25 to 30 kt with gusts up to 45 kt. Seas 7 to 10 ft. Patchy fog. A chance of snow showers.
Sat night..NW winds 20 to 25 kt with gusts up to 40 kt, diminishing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 5 to 8 ft.
Sun..W winds 10 to 15 kt, becoming sw 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 6 ft.
Sun night..SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft.
Mon..W winds 5 to 10 kt, becoming nw with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. A chance of rain.
Mon night..N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of rain.
Tue..N winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft.
Tue night..N winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft.
Wed..NE winds 10 to 15 kt. Seas 3 to 5 ft.
Wed night..SE winds 5 to 10 kt. Seas 2 to 4 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 716 Pm Edt Fri Mar 22 2019
Synopsis for massachusetts and rhode island coastal waters.. Low pres will along coastal maine tonight. This low will move to the canadian maritimes Saturday. NW gales develop tonight and continue into Sat behind the departing low. Less wind Sunday as high pressure builds into the mid atlc region. A cold front then sweeps across the waters Mon followed by high pressure Tue and Wed. 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 Orleans CDP, MA
   Hourly   EDIT   Help
location: 41.77, -69.94     debug


Area Discussion for - Boston, MA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kbox 222343
afdbox
area forecast discussion
national weather service boston norton ma
743 pm edt Fri mar 22 2019

Synopsis
Scattered showers will change to a period of snow tonight with
some accumulations expected at least in the high terrain and it
will become windy. Dry weather is on tap for Saturday, but it
remains windy. Milder temperatures arrive Sunday, but it will
turn colder again Monday into the middle of next week.

Near term until 6 am Saturday morning
* accumulating snow for the high terrain tonight but a touch of
snow in all locations overnight
* turning windy across the entire region tonight
725 pm update...

noting a few locations reporting light rain across the region at
23z as temps were mainly in the lower-mid 40s. Do see some -sn
across the berkshires (kaqw, kddh and kpsf namely). Should see
colder air work in across the region tonight, which will allow
precip to switch over to snow.

As mentioned in the previous discussion, noting another rather
potent short wave working around the deep low pres (down to 976
hpa at 21z) along the W maine coast, another area of precip may
dive S out of N central maine overnight. Short range models,
especially the latest hrrr, showing the precip moving in around
or after midnight.

Also noting some convective precip across SW maine on latest ne
regional 88d radar imagery. If this holds on, could see some
brief heavy snow push into the merrimack river valley for a
time. Something to monitor.

Have updated near term to bring conditions current. Incorporated
a bit of the short range model data into this update. Very
similar to the previous forecast.

Previous discussion...

despite the fact that the surface low will be lifting into
downeast maine tonight, another robust piece of shortwave
energy drops southeast. The result will be an increase in areal
coverage of the precipitation this evening, especially during
the overnight hours. The column will also be cooling, so any
mixed precipitation will quickly change to snow showers across
the high terrain. An initially mild boundary layer will result
in this process taking until later this evening and possibly
after midnight in some lower elevations. However, we do expect
all locations to change to see at least a brief period of snow
showers.

A rather interesting snowfall forecast too with some
rather unusual mesoscale processes in play. Strong low level
northwest flow will result in upslope enhancement in the
berkshires as well as worcester ct hills. The northwest wind
trajectory will favor the western portions of the hills, where
the upslope is enhanced.

The exact wind trajectory actually favors tolland county ct
where upslope flow will be enhanced. They are also closest the
the dynamics of the shortwave passing near the south coast.

Therefore, we opted to go with a winter weather advisory there
for 2 to 4 inches of snow. We also continued those headlines for
western franklin western hampshire county in ma, where an
additional 2 to 5 inches of snow is possible tonight with higher
amounts near and above 1500 feet. Across the worcester hills,
the upslope component is not quite as strong and the better
dynamics are to their south. Nonetheless... 1 to 3 inches of snow
appear reasonable on the western slopes, but there is a low
risk will need to upgrade to an advisory depending on how things
transpire. Across the rest of the region... Generally a coating
to 1 inch of snow is possible mainly on grassy surfaces.

However,there is a low risk for isolated 2 inch amounts across
portions of ri SE ma where the strongest dynamics appear to
reside.

Lastly, the sub 980 mb low will increase the pressure gradient
and result in westerly wind gusts of 35 to 45 mph. It is on the
cusp of wind advisory criteria, but for now opted to only
include the CAPE nantucket given it is rather marginal.

Short term 6 am Saturday morning through 6 pm Saturday
Saturday...

the snow showers will pretty much be over by daybreak Saturday.

While some clouds may linger in the morning, skies should become
partly to mostly sunny by late morning early afternoon. Strong
mixing supports westerly winds of 35 to 45 mph with perhaps a
few gusts up to 50 mph. Again... We were on the cusp of wind
advisory criteria but held off at this point except for the
cape nantucket. Later shifts may need to consider expanding
dependent on future model guidance. High temperatures should be
well up in 40s to perhaps near 50 across portions of ri SE ma.

Long term Saturday night through Friday
Highlights...

* brisk conditions Saturday evening, then dry and milder Sunday
* cold front brings rain late Sunday night and Monday, with
snow across the higher inland terrain
* colder weather follows through mid week, then temperatures
look to rebound late next week
details...

Saturday night and Sunday...

large high pressure builds SE across mid atlc on general w-nw
flow aloft. May see some gusts up to 25 kt or so Sat evening
with leftover pressure gradient will diminish overnight. Should
end as low level lapse rates quickly drop below h85. However,
winds will remain gusty across the coastal waters with good low
level mixing there. Skies clear out, which will allow for
radiational cooling away from the coast. Temps will bottom out
in the mainly in the 20s, but only down to the lower 30s along
most of the immediate coast.

Will remain dry on Sunday as the high passing S of the region.

So, will see sunny skies early, but high clouds will start to
push in across western areas during the afternoon. Highs will
range from the mid-upper 40s across the higher terrain and
across most of the CAPE and islands, up to the lower-mid 50s
elsewhere.

Sunday night and Monday...

as the high positions off the mid atlc and carolina coasts,
arctic front pushes steadily SE Sun night, while weak low pres
shifts E across the southern great lakes and ohio valley. Should
see the leading edge of the precip shift into N mass after
midnight Sun night. Temps will be cold enough for precip to
start off as light snow, though QPF values will be less than 0.1
inches, so should not see a lot of snow accumulation.

The front will slowly push across the region during Monday,
with some enhanced precip as the midwest low slides along it.

Temps will be close for rn sn mix or light snow in general,
mainly across the higher terrain into N central NW mass Sunday
morning before changing over to all rain. As the front moves s,
winds shift to NW but the colder air lags behind. So, expect
temps to top off in the upper 30s to lower 40s across the higher
terrain, ranging to the upper 40s across the coastal plain.

Colder air filters in during late Mon and Mon night, with lows
in the upper teens and 20s, except around 30 along the immediate
s coast.

Tuesday and Wednesday...

dry but cold conditions in place during this timeframe as
another large high slowly crosses the eastern half of the u.S.

Coldest air expected Tuesday as h85 temps drop to -14c to -18c
(s to n) around 12z Tuesday. Expect high temps to run 10 to 15
degrees below seasonal normals, mainly in the 30s except around
40 across the lower ct valley and S coastal areas. Winds will
diminish Tue night so radiational cooling will allow temps to
plummet down to the mid teens to lower 20s inland, ranging to
the mid-upper 20s along the coast.

As the center of the 1036 hpa high crosses new england
Wednesday, will see mostly clear skies but it will remain cold.

Temps will be about 5 degrees above Tuesday's readings, but
still only in the upper 30s to mid 40s.

Thursday and Friday...

the high will remain along the eastern seaboard Thursday as
broad troughing begins to develop across the N central and
western u.S. Some question where the ridge axis sets up, which
will determine the temp profile. For now, looks like temps will
rebound to near or a bit above seasonal levels late next week,
but quite a bit of uncertainty as to the position of the high.

At this point, the dry regime looks to continue.

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

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday ...

tonight... Moderate to high confidence.

Expect scattered showers to increase in areal coverage through
the evening. Ptype mainly shsn across the E slopes of the
berkshires into S vt, but probably will take until late evening
or even after midnight to reach some of the lower elevations. A
few inches of snow are likely in the higher terrain. In the
lower elevations, expect a coating to 1 inch with a low risk for
up to 2 inches across portions of ri SE ma. Most runways in the
lower elevations will remain wet, but a brief slushy coating of
snow would be possible in any heavier snow showers. MVFR
conditions will dominate tonight, but ifr thresholds will be met
in bands of snow showers with brief lifr conditions not out of
the question. Westerly wind gusts of 30 to 40 knots expected.

Saturday... High confidence.

Some lingering MVFR ceilings in the morning will improve toVFR
by afternoon. Northwest wind gusts of 30 to 40 knots expected.

Kbos terminal... Moderate to high confidence in taf.

Kbdl terminal... Moderate to high confidence in taf.

Outlook Saturday night through Wednesday ...

Saturday night: mainlyVFR, with areas ifr possible. Windy with
gusts up to 35 kt.

Sunday: ifr. Breezy.

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

Monday: mainly MVFR, with areasVFR possible. Chance ra.

Monday night through Tuesday:VFR. Breezy.

Tuesday night through Wednesday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday ...

*** wnw gales tonight and Saturday ***
tonight and Saturday... High confidence.

Strong low pressure lifting into downeast maine will result in
an increasing pressure gradient. The result will be high
confidence in west to northwest gale force wind gusts of 35 to
45 knots developing tonight and continuing into Saturday. Gale
warnings remain posted for all waters through Saturday
afternoon.

Outlook Saturday night through Wednesday ...

Saturday night: low risk for small craft advisory winds with
gusts up to 30 kt. Areas of rough seas. Visibility 1 nm or
less.

Sunday: low risk for small craft advisory winds with gusts up
to 25 kt. Areas of seas approaching 5 ft. Visibility 1 nm or
less.

Sunday night: winds less than 25 kt. Areas of seas approaching
5 ft. Local visibility 1 nm or less.

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

Chance of rain.

Monday night: winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain showers, slight chance of snow
showers. Local visibility 1 to 3 nm.

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

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

Box watches warnings advisories
Ct... Winter weather advisory until 7 am edt Saturday for ctz003.

Ma... Wind advisory until 4 pm edt Saturday for maz022-024.

Winter weather advisory until 8 am edt Saturday for maz002-008.

Ri... None.

Marine... Gale warning until 8 pm edt Saturday for anz231>235-237-250-
251-254>256.

Gale warning until 6 pm edt Saturday for anz230-236.

Synopsis... Frank evt
near term... Frank evt
short term... Frank
long term... Evt
aviation... Frank evt
marine... Frank evt


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 21 mi57 min 38°F4 ft
44020 - NANTUCKET SOUND 26 mi37 min W 25 G 29 42°F 39°F3 ft988.5 hPa35°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 32 mi37 min W 21 G 27 39°F 7 ft985.4 hPa (+2.6)33°F
WAXM3 - Waquoit Bay Reserve, MA 34 mi102 min WSW 5.1 43°F 988 hPa36°F
NTKM3 - 8449130 - Nantucket Island, MA 35 mi39 min WSW 12 G 20 42°F 42°F989.3 hPa
BZBM3 - 8447930 - Woods Hole, MA 42 mi39 min 43°F 40°F989.1 hPa

Wind History for Nantucket Island, MA
(wind in knots)    EDIT      (on/off)   Help
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
Last
24hr
E14
G19
E16
G22
E17
G21
E16
G23
E19
G23
E17
G24
E22
G28
E27
NE13
G21
NE9
G15
N6
N7
G12
NW6
G9
NW5
G9
NW6
G9
NW6
G12
NW7
G14
W12
G19
W11
G17
W11
G23
W11
G24
W12
G19
W12
G23
W12
G21
1 day
ago
S5
G10
S6
G12
S7
G10
S5
G9
S3
G6
SE3
G6
SE2
G5
SE2
G7
SE4
G7
SE6
G9
SE7
G11
SE9
G14
SE10
G19
SE11
G18
SE12
G20
SE15
G20
SE15
G22
SE14
G20
SE13
G22
E13
G19
E13
G18
E12
G16
E12
G17
E13
G20
2 days
ago
SW3
G6
W5
G10
W4
G7
W4
W2
W4
NW4
NW3
W3
NW2
NW3
W4
NW4
N6
NE3
N4
SW7
G10
S6
G10
S6
G11
SW8
G12
S7
G11
S7
G11
S5
G9
S6
G10

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chatham, Chatham Municipal Airport, MA6 mi35 minW 11 G 2210.00 miOvercast42°F34°F73%988 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA19 mi31 minWSW 1410.00 miOvercast45°F34°F66%987.5 hPa
Provincetown Municipal Airport, MA22 mi31 minW 17 G 2310.00 miOvercast40°F35°F83%986.8 hPa

Wind History from CQX (wind in knots)
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
Last 24hrE10E11
G18
E8E11E10E13
G19
E14
G23
E11
G23
NE9
G18
NE15
G24
NE9
G18
NE84NW9W6W5W10
G20
NW10
G20
W8
G18
W8
G19
W8W8
G15
W10
G24
W11
G22
1 day agoSW8SW9SW7
G15
6S5S4SW3S3S5SE6SE4SE6SE9
G15
SE10SE10
G18
SE8
G19
SE12
G17
SE11
G18
SE8
G16
SE7E10
G16
E10E8E9
2 days agoE3CalmCalmW3W3W3NW4NW4NW4NW3CalmCalm4CalmS5S8S7SW8SW7SW6
G14
6SW9
G16
SW8SW5

Tide / Current Tables for Nauset Harbor, Cape Cod, Massachusetts
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Nauset Harbor
Click for Map
Fri -- 01:16 AM EDT     7.22 feet High Tide
Fri -- 06:40 AM EDT     Sunrise
Fri -- 07:42 AM EDT     -1.13 feet Low Tide
Fri -- 07:53 AM EDT     Moonset
Fri -- 01:40 PM EDT     7.29 feet High Tide
Fri -- 06:54 PM EDT     Sunset
Fri -- 08:07 PM EDT     -1.04 feet Low Tide
Fri -- 08:58 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
6.37.275.94.32.50.6-0.8-1.1-0.21.63.75.877.26.55.13.31.4-0.3-1-0.60.92.9

Tide / Current Tables for Pollock Rip Channel, Massachusetts Current
   EDIT      (on/off)   Help   One Week of Data
Pollock Rip Channel
Click for Map
Fri -- 01:39 AM EDT     -2.09 knots Max Ebb
Fri -- 04:46 AM EDT     0.00 knots Slack
Fri -- 06:40 AM EDT     Sunrise
Fri -- 07:53 AM EDT     Moonset
Fri -- 08:08 AM EDT     2.32 knots Max Flood
Fri -- 11:11 AM EDT     -0.00 knots Slack
Fri -- 02:00 PM EDT     -2.17 knots Max Ebb
Fri -- 05:08 PM EDT     0.00 knots Slack
Fri -- 06:54 PM EDT     Sunset
Fri -- 08:33 PM EDT     2.41 knots Max Flood
Fri -- 08:58 PM EDT     Moonrise
Fri -- 11:40 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
-1.3-2-2.1-1.7-0.80.31.322.32.11.40.3-1-1.9-2.2-1.9-1.2-0.211.92.32.41.90.9

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (20,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Boston, MA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.