Friday, March22, 2019 L-36.com


Marine Weather and Tides
Kennebunk, ME

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 6:57PM Friday March 22, 2019 1:52 AM EDT (05:52 UTC) Moonrise 9:03PMMoonset 7:55AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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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ANZ154 Coastal Waters From Cape Elizabeth, Me To Merrimack River, Ma Out 25 Nm- 1115 Pm Edt Thu Mar 21 2019
.gale warning in effect from late Friday night through Saturday evening...
Overnight..E winds 10 to 20 kt. Gusts up to 30 kt. Seas around 3 ft, building to 4 to 6 ft. A slight chance of rain late this evening, then rain.
Fri..E winds 10 to 20 kt, becoming S 10 to 15 kt in the afternoon. Gusts up to 30 kt. Seas 6 to 9 ft. Rain, mainly in the morning. Vsby 1 to 3 nm.
Fri night..W winds 10 to 20 kt, increasing to 15 to 25 kt after midnight. Gusts up to 35 kt. Seas 7 to 10 ft. Rain likely in the evening, then rain likely with a chance of snow showers after midnight with vsby 1 to 3 nm.
Sat..W winds 20 to 30 kt with gusts up to 45 kt. Seas 5 to 8 ft. A chance of rain and snow showers in the morning with vsby 1 to 3 nm.
Sat night..NW winds 15 to 25 kt with gusts up to 35 kt. Seas 3 to 5 ft.
Sun..W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Sun night..W winds 5 to 10 kt. Seas 2 to 3 ft.
Mon..W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
Mon night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Tue..N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Tue night..N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
ANZ100 1115 Pm Edt Thu Mar 21 2019
Synopsis for stonington me to merrimack river ma out to 25 nm.. Low pressure over the mid atlantic region will lift north and east...reaching the gulf of maine Friday evening. This low will then lift north and east into the canadian maritimes on Saturday with a high pressure ridge sliding south of the waters through Sunday. A cold front dropping south out of canada will cross the waters late Monday and Monday night with high pressure building over the waters for the midweek. &&


7 Day Forecast for Marine Location Near Kennebunk, ME
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location: 43.32, -70.56     debug


Area Discussion for - Gray/Portland, ME
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Fxus61 kgyx 220323
afdgyx
area forecast discussion
national weather service gray me
1123 pm edt Thu mar 21 2019

Synopsis
Low pressure moving up from the carolinas will track north to
coastal maine on Friday, deepening rapidly as it does so. Rain
will quickly spread into the area tonight after midnight across
most of new hampshire and western maine, though the highest
elevations may see snow through the overnight. Low will make its
closest approach Friday will an end of widespread precipitation
as drier air aloft moves overhead. Colder air and gusty winds
move in from the west Friday night and Saturday. Snow showers
will break out across much of new hampshire and western
maine, with moderate accumulations possible in the higher
terrain.

Near term until 6 am Friday morning
1100 pm update...

quick update to finally adjust area temps tds. Surface obs
beginning to come in but some remain missing so have patched
together an update using 02z and 03z data. Rain and snow
beginning to break out in northern zones while main area of
precip expected to affect the region after midnight pushing into
southern new england. Have tweaked area pops based on latest
radar trends... But no major changes to current forecast planned
attm.

800 pm update...

much of 00z obs missing across the northeast this evening
obviously due to some sort of comms problem. So unable to adjust
temps tds rh apprnt temp grids. Planning to update these grids
once data starts flowing again. Aside from that have tweaked
pops in western zones where showers continue to flirt with the
connecticut valley and should remain light and spotty through
the midnight. Area of rain which will push into the region from
the south later tonight just approaching long island and
southern new england and should reach southern zones shortly
after midnight. No major changes to current forecast planned
attm.

Prev disc...

significant cyclogenesis is expected tonight as an arctic S wv
trof phases with upper low moving ewd towards the mid atlantic.

Low pressure around 1000 mb currently will fall into the 970s by
the time it reaches the gulf of me fri.

The initial surge of WAA N of the low will lead to some
scattered showers... Though these are mostly expected to
evaporate before reaching the ground and or stay W of the area.

The best chance to see any precip will be over the ct river
valley. The main area of precip will be arriving mainly after
midnight from S to n. Current wet bulb temps are around 40
degrees for most of the lower elevations... And there is really
no mechanism to cool those areas until low pressure slips E of
your longitude. That means the dominant ptype is expected to be
rain overnight. The story is different for higher elevations
however. The warm nose is forecast to be around 900 mb... With
temps above that cooling fairly quickly. Above 4000 ft or so
should be all snow... But the band from 1500 to 4000 ft could be
very close to isothermal around 0c for much of the night. A tick
colder could mean plenty of elevation snow vs a change to rain.

I only have plowable amounts in the highest of the whites and
wrn me mtns... With an inch or less outside of that down to
around 1500 ft. Again will have to watch temps aloft closely... A
slightly farther E low pressure that deepens quickly could lead
to some bust potential and an increase in snow totals.

Otherwise some moderate to heavy rain will move thru S of the
mtns... And an isolated rumble of thunder cannot be ruled out
either.

Short term 6 am Friday morning through Friday night
Dry slot will quickly lift thru the forecast area fri
morning... Especially S of the mtns. This will bring an end to
significant accumulation of precip for those areas. Ultimately
looks like less than 1 inch QPF for most... Which should not
create too many issues on area rivers. The biggest threat will
be W central me... Where around 1 inch may be enough to move ice
and increase the risk for jams.

Will also be seeing temps aloft cooling quickly as low pressure
peaks in intensity. That will transition precip in the mtns back
to snow... For places that changed over to rain in the first
place. Especially later in the day and overnight low level
moisture increases again... And h7 low will swing S of the
forecast area and frontogenesis on the NW side will move thru.

The mtns will be seeing widespread upslope snow showers... But
even in the lower elevations the h7 low may be enough to coat
the ground across SRN nh as colder air sneaks in from the sw.

Fri night into Sat will see the bulk of the snow accumulation in
the higher terrain... And advisories may be warranted if signals
continue for a moderate snowfall.

Finally early Sat morning CAA will start to increase mixing
height... And winds will become gusty. Though the bulk of the
wind holds off until after 8 am... A few gusts between 30 and 40
mph are possible.

Long term Saturday through Thursday
High impact weather potential:
* continued light snow accumulations in the upslope regions of the
mountains on Saturday.

* wind gusts may approach advisory levels in a few locations on
Saturday.

* some potential for wintry precipitation late Monday Monday night
associated with a surface cold front.

--pattern and implications--
the upper level flow pattern early this afternoon is largely
dominated by a ridge-trough setup across north america with longwave
trough over eastern north america being reinforced south of mid
level vortex centered west of greenland. Sprawling ridge along the
west coast is being squeezed by energy diving into the southwestern
united states. The downstream flow pattern is not blocked +nao so
while the overall flow pattern favors colder than normal
temperatures with flow off the pacific largely blocked... The shots
of cold are transient. In terms of impactful weather, this comes
with each re-enforcing shot of the eastern trough. The first is
ongoing now... With developing east coast low pressure system still
impacting this region to open the long term period on Saturday.

Quiet weather looks to overspread the region behind this low for
Sunday and early next week... With next approaching northern stream
cold front potentially bringing precipitation to the region later
Monday and Monday night. Quiet weather again looks to dominate the
end of this forecast period.

--daily details--
Saturday: guidance consensus places low pressure over downeast
maine to start the day with some discrepancies with regards to it s
strength. Regardless... The low lifts north and east into the
canadian maritimes during the day with cool and moist cyclonic flow
continuing across the gyx forecast area through the day. Expect
daybreak rain and snow shower activity to become increasingly
confined to upslope areas of the nh and western me mountains. T8s
will be around -10c with t9s falling towards -5c in nh... And to
around -2c in western me. With the clouds... Expect highs around 30
in the mountains... But downsloping should assist in bringing areas
over southern nh and coastal me above 40.

Snow accums: model soundings across the upslope areas suggest a
pretty shallow precipitation production region... But it does reach
into the dendritic growth zone. Thus... Expect it to snow all day in
upslope areas... But likely only 1-2" a bit more over the higher
terrain additional snowfall with somewhat marginal boundary layer
temperatures indicating that road conditions will likely improve
during the day.

Wind: gradient will be robust... With statistical guidance showing
15-20kts sustained winds at many locations... Which typically puts us
close to advisory level wind gusts. Pressure rise center looks to
be over vermont at daybreak... Pushing out over the gulf of maine
through the day. Cold air advection will largely be over... But with
proximity of upper level low... We ll have good lapse rates and
plenty of mixing potential. The gradient supports 30-40kts at h9.

Thus... The setup suggest a windy... But likely just short of advisory
level wind day. Could see a few isolated power outages... But we re
pretty resilient to the nwerly flow direction. No need for wind
headlines with this package.

Sunday-Sunday night: high pressure build south of the region with
with polar front nearing the forecast area from the north by
daybreak Monday. Thus... Expect a respite in the active weather with
t9s in the -2c north to +3c south range due to weak warm advection
from the day previous suggesting highs in the 40s to lower 50s from
north to south.

Monday-Tuesday: there is good deterministic ensemble guidance
agreement that a potent cold front will be near the international
border to begin the day on Monday with the next surge of
polar arctic air poised to the north. Differences develop with
regards to an upstream shortwave located over the ohio valley Monday
morning and whether this teams up with the front to bring a light
precipitation event to our forecast area Monday afternoon and night
21.00z ec or whether the wave passes south of new england with the
front largely moving through our area dry. Given the current
setup... Will move above the larger model consensus and indicate
chance pops... But await some more clarity in the guidance before
making more substantial changes. Precipitation over much of the area
could very well take the form of snow if it occurs... But any accums
look light at this time. Of much higher confidence is a cooling
trend with robust cold advection Monday night resulting in a well-
below normal temperature day on Tuesday.

Wednesday: expansive area of high pressure across the great lakes
on Tuesday is well agreed upon by the guidance to edge into the
forecast area to end the period on Wednesday. This promises a
return to dry conditions. In terms of temperatures... GFS ec
ensemble guidance already points to a -2 sigma signal in the t8
field. Thus... Agree with the CPC 6-10 day outlook of below normal
temperatures to end this forecast period... Which is well captured in
the statistical guidance.

Aviation 03z Friday through Tuesday
Short term... Initial warm advection is producing a few very
light shra... But not expected to significant impact any
terminals thru about 06z. Main area of ra and low CIGS will
quickly move nwd around that time. Ifr conditions will develop
from S to N between 06z and 09z. Around that time period llws
will also develop as SE winds increase between 1500 and 2000 ft.

Ra and llws will continue thru Fri morning when dry slot lifts
thru the area. Low CIGS will likely continue into the afternoon
and evening when wly flow starts to scatter out low level
moisture. Significant period of upslope shsn is expected to
develop late Fri too. Local ifr in shsn will be
possible... Especially at leb and hie.

Long term...

conditions improve toVFR on Saturday outside of the mountains with
ifr MVFR shsn likely continuing at hie and possibly at leb.

Northwesterly wind gusts to 35 knots are possible during the day as
well.VFR likely for Sunday through early Monday with some potential
for a period of MVFR ifr restrictions in rasn late Monday and Monday
night.

Marine
Short term... Low pressure will rapid strengthen tonight. Winds
will increase... But it is a tricky forecast as low pressure is
going to hug the coast. Near the center of the low winds may be
light enough that we do not see gale force gusts tonight. Opted
not to issue a gale warning for tonight and rather in the much
higher confidence winds Fri night into sat. A few gusts outside
the bays to around 35kt are possible late tonight however. We
will see a lull in winds during the day Fri before they ramp up
again after midnight.

Long term... Gales likely given strong northwesterly gradient on
Saturday... With winds and waves subsiding Saturday night. The
next threat of SCA conditions will arrive Monday and potentially
Tuesday with the passage of a strong cold front.

Hydrology
Warming temperatures and upcoming rainfall may be sufficient
runoff to cause rises on rivers and streams. At this time qpf
looks to be less than an inch... But ice break up may lead to
jams and possible flooding especially over parts of western me.

Tides coastal flooding
Winds and seas begin to build right around the time of high tide
tonight. However, the vast majority of increased storm surge of
around a foot will occur around or shortly before the time of
the midday high tide on Friday. With high astronomical tides
already in place, minor coastal flooding is possible from
portland and points south during this tidal cycle. Most likely
we remain below 13 ft at portland, so a coastal flood advisory
has been issued from there south. Some splash over or erosion
may occur northward to penobscot bay and a coastal flood
statement has been issued.

00z wave models suggest long period waves arrive Friday night
into Saturday. Therefore, with high astronomical tides still in
place, there is the possibility for beach erosion and splash-
over to continue for subsequent tides. This additional splash-
over has been indicated in wave run-up output.

Gyx watches warnings advisories
Me... Coastal flood advisory from 11 am to 3 pm edt Friday for
mez023-024.

Nh... Coastal flood advisory from 11 am to 3 pm edt Friday for
nhz014.

Marine... Gale watch from late Friday night through Saturday evening for
anz151-153.

Gale warning from midnight Friday night to 8 pm edt Saturday
for anz150-152-154.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WELM1 - 8419317 - Wells, ME 0 mi52 min E 8 G 9.9 39°F 39°F1011.3 hPa (-4.0)
WEXM1 - Wells Reserve, ME 1 mi52 min ENE 5.1 38°F 35°F
44030 - Buoy B0102 - Western Maine Shelf 12 mi108 min ESE 12 G 14 39°F 38°F3 ft1011.1 hPa
BGXN3 - Great Bay Reserve, NH 23 mi67 min ENE 5.1 38°F 1012 hPa35°F
IOSN3 - Isle of Shoals, NH 25 mi52 min ENE 18 G 20 39°F 1009.2 hPa (-4.2)37°F
44007 - PORTLAND 12 NM Southeast of Portland,ME 26 mi62 min ESE 14 G 18 38°F 38°F3 ft1011 hPa (-4.3)36°F
CASM1 - 8418150 - Portland, ME 29 mi58 min 38°F 38°F
44098 - Jeffrey's Ledge, NH (160) 42 mi44 min 39°F4 ft

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sanford, Sanford Regional Airport, ME9 mi56 minENE 410.00 miOvercast35°F33°F93%1012.1 hPa
Rochester - Skyhaven Airport, NH19 mi61 minVar 410.00 miOvercast37°F35°F93%1010.8 hPa
Pease Air Force Base / Portsmouth, NH21 mi3.9 hrsE 710.00 miOvercast39°F33°F82%1014.2 hPa

Wind History from SFM (wind in knots)
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1 day agoCalmCalmCalmCalmCalmCalmCalmCalmS7Calm3NW65S8S8SE8S7
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2 days agoCalmCalmCalmCalmCalmCalmCalmNE4364W13W9NW13
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Tide / Current Tables for Kennebunkport, Maine
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Kennebunkport
Click for Map
Fri -- 12:47 AM EDT     10.47 feet High Tide
Fri -- 06:42 AM EDT     Sunrise
Fri -- 06:57 AM EDT     -1.57 feet Low Tide
Fri -- 07:54 AM EDT     Moonset
Fri -- 01:12 PM EDT     10.57 feet High Tide
Fri -- 06:56 PM EDT     Sunset
Fri -- 07:21 PM EDT     -1.40 feet Low Tide
Fri -- 09:02 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1010.49.57.24.11.1-0.9-1.6-0.71.44.47.49.610.510.18.35.52.4-0.1-1.3-1.10.53.36.3

Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
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Portsmouth Harbor Entrance
Click for Map
Fri -- 02:18 AM EDT     -0.00 knots Slack
Fri -- 05:07 AM EDT     -2.42 knots Max Ebb
Fri -- 06:42 AM EDT     Sunrise
Fri -- 07:55 AM EDT     Moonset
Fri -- 08:47 AM EDT     0.00 knots Slack
Fri -- 10:59 AM EDT     1.72 knots Max Flood
Fri -- 02:37 PM EDT     -0.00 knots Slack
Fri -- 05:28 PM EDT     -2.48 knots Max Ebb
Fri -- 06:57 PM EDT     Sunset
Fri -- 09:03 PM EDT     Moonrise
Fri -- 09:11 PM EDT     0.01 knots Slack
Fri -- 11:25 PM EDT     1.77 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.10.3-0.9-2-2.4-2.3-1.8-10.31.41.71.51.20.6-0.4-1.7-2.4-2.4-2-1.4-0.311.7

Weather Map and Satellite Images
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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 Gray/Portland, ME (1,6,7,8)
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Ground Weather Radar Station Portland, ME
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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.