Friday, July19, 2019 L-36.com


Marine Weather and Tides
Rockport, MA

Version 3.4
NOTICE
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 5:20AMSunset 8:17PM Friday July 19, 2019 12:32 AM EDT (04:32 UTC) Moonrise 10:09PMMoonset 7:47AM 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
ANZ251 Massachusetts Bay And Ipswich Bay- 1022 Pm Edt Thu Jul 18 2019
Overnight..NE winds around 5 kt. Seas 2 to 3 ft.
Fri..NW winds around 5 kt, becoming S 10 to 15 kt in the afternoon. Seas around 2 ft.
Fri night..SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
Sat..SW winds 5 to 10 kt. Seas around 2 ft.
Sat night..SW winds 5 to 10 kt. Seas around 2 ft.
Sun..SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms.
Sun night..W winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms.
Mon..N winds around 5 kt. Seas around 2 ft. A chance of showers.
Mon night..W winds around 5 kt. Seas around 2 ft. A chance of showers.
Tue..NE winds around 5 kt. Seas around 2 ft. A chance of showers.
Tue night..N winds around 5 kt. Seas around 2 ft. 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 1022 Pm Edt Thu Jul 18 2019
Synopsis for massachusetts and rhode island coastal waters.. The remnants of barry will pass across the southern half of the waters overnight. A warm front will lift ne over the waters Fri behind which will be an increase in heat and humidity. A weak frontal boundary moves through Fri night possibly triggering a few showers, but overall it will dry, warm and muggy. The heat and humidity will continue to build over the waters Sat and Sun. A few showers or tstms could develop Sun afternoon into Sun night as a frontal boundary meanders south across the region then becomes nearly stationary in and around the south coast. The front could become the focus for showers across the southern half of the waters Mon and Tue. 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 Rockport, MA
   Hourly   EDIT   Help
location: 42.65, -70.62     debug


Area Discussion for - Boston, MA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kbox 190309
afdbox
area forecast discussion
national weather service boston norton ma
1109 pm edt Thu jul 18 2019

Synopsis
Showers along the south coast and CAPE cod will weaken and push
offshore overnight. Sunshine and warmth return on Friday as
some of the hottest weather in years starts to move across the
region. Dangerous heat and humidity are on tap this weekend with
heat index values approaching or perhaps exceeding 110 degrees.

Dry weather should dominate this weekend, but a few
thunderstorms are possible later Sunday and Sunday night as a
cold front crosses the region. Much cooler and less humid
follows for the next work week, especially on Monday with the
potential for some showers.

Near term until 6 am Friday morning
1040 pm update...

stationary front S and W of the region will linger overnight as a
weak wave of low pressure passes S of the islands. Pwat values
remain at or above 2 inches from about a kpvd-kpvc line southward as
seen on SPC 02z pwat map, about where the bands have set up. These
continue to move eastward as suggested by the SPC h85 moisture
transport vectors, so any precip should be confined to the immediate
s coast and across the waters.

Latest radar trends showing the coverage of these bands has been
lessening as they shift E as the best forcing has also been shifting
e, so should see shower activity diminish through the remainder of
the night.

Low level moisture does linger across SE new england with t td
spreads at or below 3 degrees. This will combine with general e-ne
wind flow to keep patchy fog will linger through most of the night,
some of which will be locally dense mainly across CAPE cod and the
islands.

Temps will bottom out in the lower-mid 60s across most areas, though
a few spots in the urban heat islands may remain a bit milder.

Have updated near term to bring conditions current. Incorporated
trends through the overnight hours, which was close to the previous
forecast.

Short term 6 am Friday morning through Friday night
As of 420 pm...

not much going tomorrow. Flow turns back to the west southwest
and starts to advect in some warmer air and push the moisture
out. That will bring back partly to mostly sunny skies. With
850mb temperatures up around 19c, that suggest the potential for
surface highs reaching 33-34c (92-94f). With some clouds
around, we may just fall short of that potential, but upper 80s
to lower 90s is a good bet. Right along the coast, especially
eastern ma, there will be a sea breeze to drop temperatures a
few degrees. Models suggest convection developing during the day
out across ny state. Could be a rogue shower that makes it into
the far western part of the forecast area Friday evening, but
at this point i've kept the pops out there less than 15%. Friday
night should be quiet, though with increasing dewpoints, there
should be areas of low clouds fog that develop off the south
coast through the CAPE and islands.

During the day Friday, heat index values will approach the mid
90s in most areas, with 100f or so in the connecticut river
value. This is due to the combo of the hot temperatures and
dewpoints rising to near 70. "by the book", this meets only heat
advisory thresholds. However since the heat will continue to
build for the weekend, we've decided to issue an excessive heat
warning that becomes effective Friday and continues into Sunday,
rather than try to split hairs and separate out Friday vs
Saturday and Sunday.

Long term Saturday through Thursday
Highlights...

* dangerous heat humidity this weekend: heat indices may
approach or even exceed 110 degrees
* a few thunderstorms are possible Sun afternoon night as a
cold front crosses the region
* much cooler less humid for the next work week especially mon
with the potential for some showers.

Details...

this weekend...

strong upper level ridging across the mid-atlantic southeast
states will pump a highly anomalous hot humid airmass into
southern new england. 850t around +22c will support and
westerly flow will support near record high temperatures this
weekend. In fact... One of the top cips analogs for this weekend
is july 22nd, 2011 which is the last time many of our sites
reached the century mark. Some guidance may be a few degrees
too cool given its tendency to trend towards climatology.

Overall, expect high temperatures to generally be in the 96 to
102 degree range away from localized marine influences along
the coast.

More important than the actual temperatures will be the heat
index values. We have an EML in place on sat, which tends to
keep the surface dewpoints from mixing out. On Sunday, a cold
front will be dropping south and dewpoints may pool for a time
along the boundary. Given the above expect dewpoints mainly in
the 70s over the weekend. The expected high temperatures and
dewpoints will likely result in heat index values approaching
or even exceeding 110 degrees during peak afternoon heating
this weekend. Therefore, excessive heat warnings are in effect
this weekend for basically the entire region. Heat advisories
have been issued for CAPE cod marthas vineyard.

Much of the weekend will feature dry weather, but there will be
a couple things will need to watch. An elevated mixed layer in
place Sat into early Sun along with very high instability for
this part of the country. However, it looks like we probably
will be capped keeping us dry Sat into early sun. That being
said given the extreme instability and an EML in place, there is
a very small risk that a complex of thunderstorms develop and
cross our region. While this appears to be a rather low risk at
this time, if it were to happen it would have some high end
potential given the environment. A better chance exists for a
few showers thunderstorms later Sunday into Sunday night with
the cold front, but low confidence on areal coverage.

Monday through Thursday...

a much cooler less humid airmass works into the region behind
the cold front, especially Monday and Tuesday. A wave of low
pressure developing on the front to our south may result in some
showers isolated t-storms Mon which may linger into part of
tue, especially across southeast new england. This will also
help to keep temperatures much cooler then what we have
experienced over the weekend. Mainly dry weather should allow
temps to warm up some by next Wed thu, but readings should not
be too far from typical late july temperatures.

Aviation 03z Friday through Tuesday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday night ... Moderate confidence.

0340z update...

overnight... Expect MVFR-ifr conditions will prevail overnight
across most areas. Areas of lifr along the S coast, CAPE cod and
the islands. Should see conditions improve toVFR after 09z as
drier air moves in.

Friday... Conditions will improve toVFR across most of the
region by mid morning as the clouds finally dissipate. Winds
will turn southwest, but onshore sea breezes are expected to
develop and remain right along the coast from mid morning to mid
afternoon. Southwest flow will strengthen enough by late
afternoon that it should overcome the sea breeze.

Friday night... Low clouds and areas of fog are expected to
develop Friday evening across the waters near and south of cape
cod and last all night. That will result in ifr to lifr
conditions.

Kbos terminal... Moderate confidence in taf.

Kbdl terminal... Moderate confidence in taf.

Outlook Saturday through Tuesday ... High confidence.

Saturday:VFR. Breezy.

Saturday night:VFR.

Sunday through Sunday night:VFR. Breezy. Chance shra, chance
tsra.

Monday: mainlyVFR, with local MVFR possible. Chance shra,
isolated tsra.

Monday night:VFR. Chance shra, isolated tsra.

Tuesday:VFR. Slight chance shra, isolated tsra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday night ... High confidence.

1040 pm update...

overnight... Showers and areas of fog will linger along s
coastal new england and the southern waters. Visibility will be
at or below 3nm, lowest in vicinity nantucket, but should
gradually improve toward daybreak. Light e-ne wind flow will
slowly back to N toward daybreak.

Friday and Friday night... Winds will turn to SW during the day
Friday and continue to Friday night, running about 15 knots.

Seas generally 1 to 3 feet, though 4 foot seas well south of
cape cod. Late Friday and Friday night, expecting areas of fog
to develop along and off of the south coast and over to the cape
and islands. Visibilities could be reduced to less than 1 mile.

Outlook Saturday through Tuesday ... High confidence.

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

Patchy fog.

Saturday night: winds less than 25 kt. Seas locally approaching
5 ft. Patchy fog. Local visibility 1 to 3 nm.

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

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

Chance of rain showers, isolated thunderstorms.

Monday night: winds less than 25 kt. Chance of rain showers,
isolated thunderstorms.

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

Chance of rain showers, isolated thunderstorms.

Climate
Record highest min temps for Saturday july 20:
bos: 75 in 2016
bdl: 73 in 1975
pvd: 77 in 1983
orh: 72 in 2013
record highs for Saturday july 20:
bos: 99 in 1991
bdl: 100 in 1991
pvd: 101 in 1991
orh: 92 in 1901
record highest min temps for Sunday july 21:
bos: 81 in 1991
bdl: 74 in 1977
pvd: 77 in 1980
orh: 73 in 1991
record highest MAX temps for Sunday july 21
bos: 102 in 1977
bdl: 101 in 1991
pvd: 102 in 1991
orh: 95 in 1926
last occurrence of 100f or higher temperatures
bos: 7 22 2011 (103f)
bdl: 7 18 2012 (100f)
pvd: 7 22 2011 (101f)
orh: 7 4 1911 (102f)

Box watches warnings advisories
Ct... Excessive heat warning from noon Friday to 8 pm edt Sunday for
ctz002>004.

Ma... Excessive heat warning from noon Friday to 8 pm edt Sunday for
maz002>021-026.

Heat advisory from noon Friday to 8 pm edt Sunday for maz022-
023.

Ri... Excessive heat warning from noon Friday to 8 pm edt Sunday for
riz001>007.

Marine... None.

Synopsis... Frank ajn
near term... Frank evt
short term... Ajn
long term... Frank
aviation... Frank evt ajn
marine... Frank ajn
climate...



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
44029 - Buoy A0102 - Mass. Bay/Stellwagen 9 mi89 min NNE 5.8 G 5.8 64°F 2 ft1013.2 hPa
44013 - BOSTON 16 NM East of Boston, MA 21 mi43 min ENE 5.8 G 7.8 67°F 69°F2 ft1012 hPa65°F
IOSN3 - Isle of Shoals, NH 22 mi33 min NNE 2.9 G 2.9 64°F 1013.1 hPa (-0.6)60°F
44098 - Jeffrey's Ledge, NH (160) 26 mi25 min 64°F2 ft
BGXN3 - Great Bay Reserve, NH 30 mi108 min E 1.9 59°F 1014 hPa57°F
BHBM3 - 8443970 - Boston, MA 31 mi51 min 67°F 1013.5 hPa
44030 - Buoy B0102 - Western Maine Shelf 38 mi89 min NE 1.9 G 3.9 64°F 65°F2 ft1013.4 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 40 mi43 min E 3.9 G 5.8 65°F 2 ft1013 hPa (-0.9)63°F
WELM1 - 8419317 - Wells, ME 46 mi45 min NNW 1.9 G 2.9 60°F 62°F1013.7 hPa
WEXM1 - Wells Reserve, ME 48 mi93 min WNW 1 61°F 56°F

Wind History for Wells, ME
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
Last
24hr
S2
NE1
N7
NE10
G13
NE9
G12
NE10
G13
NE10
G15
NE10
G15
NE9
G14
NE9
G13
E10
G13
E10
E10
SE8
S7
S6
S5
S5
E1
SW1
N3
N1
N2
N1
1 day
ago
S1
SE2
W5
G8
S1
SW2
S3
W7
G11
W4
G10
W7
G10
W6
G10
W7
W7
G10
W5
G10
W4
G8
W6
G9
W4
G8
S5
SW3
SW4
SW4
S8
SW2
W3
--
2 days
ago
NW4
W1
W4
NW3
S2
S5
S7
S11
S11
S14
G17
S15
S17
S13
S13
G16
S10
SW5
SE5
S2
N1
N1

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beverly, Beverly Municipal Airport, MA17 mi40 minN 310.00 miFair61°F57°F87%1012.6 hPa

Wind History from BVY (wind in knots)
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
12
AM
Last 24hrSW5NW4NW4N3NE8NE9NE10NE12
G20
NE10
G20
NE11
G21
NE12
G17
NE12NE7NE6NE7NE8NE7NE7NE6NE3CalmCalmNE3N3
1 day agoSW6SW10SW6SW5SW7SW6SW7SW7SW8SW5SW6SW8W10W6W8W7N13
G23
CalmSE3CalmS5CalmW3NW3
2 days agoCalmNW4CalmCalmCalmCalmNW3CalmCalmSW3W7W6W9--5E6SE4SE3SE3SE4S5S6SW8SW9

Tide / Current Tables for Rockport, Massachusetts
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Rockport
Click for Map
Fri -- 01:18 AM EDT     9.34 feet High Tide
Fri -- 05:21 AM EDT     Sunrise
Fri -- 07:40 AM EDT     0.07 feet Low Tide
Fri -- 07:47 AM EDT     Moonset
Fri -- 01:55 PM EDT     8.32 feet High Tide
Fri -- 07:44 PM EDT     1.05 feet Low Tide
Fri -- 08:15 PM EDT     Sunset
Fri -- 10:08 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
8.59.39.17.95.83.51.50.30.112.74.86.77.98.37.86.34.32.51.31.11.83.45.5

Tide / Current Tables for Marblehead Channel, Massachusetts Current
   EDIT      (on/off)   Help   One Week of Data
Marblehead Channel
Click for Map
Fri -- 02:19 AM EDT     -0.00 knots Slack
Fri -- 05:22 AM EDT     Sunrise
Fri -- 06:41 AM EDT     -0.43 knots Max Ebb
Fri -- 07:48 AM EDT     Moonset
Fri -- 08:48 AM EDT     0.00 knots Slack
Fri -- 12:10 PM EDT     0.41 knots Max Flood
Fri -- 02:52 PM EDT     -0.00 knots Slack
Fri -- 07:05 PM EDT     -0.38 knots Max Ebb
Fri -- 08:16 PM EDT     Sunset
Fri -- 09:06 PM EDT     0.00 knots Slack
Fri -- 10:09 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
0.40.30.1-0.1-0.3-0.3-0.4-0.4-0.30.10.30.40.40.40.2-0-0.2-0.3-0.3-0.4-0.3-00.30.4

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 (0,6,7,8)
      (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.