Thursday, May24, 2018 L-36.com


Marine Weather and Tides
Topsham, ME

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:03AMSunset 8:10PM Thursday May 24, 2018 7:34 PM EDT (23:34 UTC) Moonrise 2:58PMMoonset 2:52AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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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ANZ153 Casco Bay- 716 Pm Edt Thu May 24 2018
.small craft advisory in effect from 11 pm this evening to 6 am edt Friday...
Tonight..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Fri night..W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
Sat..W winds 5 to 10 kt, becoming ne in the afternoon. Seas 2 to 3 ft, subsiding to 1 to 2 ft in the afternoon. A chance of showers. A chance of tstms in the afternoon.
Sat night..E winds 5 to 10 kt. Seas 1 to 2 ft in the evening, then 1 foot or less. A chance of tstms in the evening. A chance of showers.
Sun..E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Sun night..E winds 5 to 10 kt. Seas 2 to 4 ft. Patchy drizzle. Areas of fog. Vsby 1 to 3 nm.
Mon..E winds around 5 kt. Seas 2 to 3 ft. A chance of showers with patchy drizzle.
Mon night..S winds around 5 kt. Seas 2 to 3 ft.
Tue..W winds 5 to 10 kt. Seas 2 to 3 ft.
Tue night..NW winds 5 to 10 kt. Seas 1 to 2 ft. Winds and seas higher in and near tstms.
ANZ100 716 Pm Edt Thu May 24 2018
Synopsis for stonington me to merrimack river ma out to 25 nm.. A warm front will cross the region tonight. High pressure will build into the region on Friday with increasing southerly flow. A backdoor cold front will move southward across the waters over the weekend. A weak disturbance will cross the region early next week.

7 Day Forecast for Marine Location Near Topsham, ME
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location: 43.92, -69.96     debug


Area Discussion for - Gray/Portland, ME
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Fxus61 kgyx 242312
afdgyx
area forecast discussion
national weather service gray me
712 pm edt Thu may 24 2018

Synopsis
A warm front will cross the area tonight. This will lead to very
warm conditions on Friday. A cold front pushes in from the northeast
on Saturday, providing a chance of showers or thunderstorms and
making Sunday much cooler. Cool and cloudy conditions linger
into Monday, before we start to see it warm up during next
week. Canadian high pressure to bring dry conditions back to the
region Tuesday through Thursday.

Near term through Friday
---705pm update---
fairly quiet night in store for us, but there are still a few things
to pay attention to. There is a remarkable temperature and relative
humidity gradient set up across the area due to the strong sea breeze
that set up earlier. Locations north of the boundary have temps
in the upper 60s to lower 70s at 6pm, with mainly 50s to the south of
the boundary. Dewpoints north of the boundary are mainly in the 30s,
with 40s and even some lower 50s along the coast. The sea breeze
progressed inland to the foothills today. Satellite imagery shows
some cloudiness over northern sections of the forecast area trying to
move south and east, but as the clouds come off the mountains the
downslope flow is pretty much causing them to dissipate. Do not
really plan to update too much of the forecast as it is largely on
track. Will update to account for current temperature trends and
maybe adjust clouds a little bit.

Previous discussion
Some mid level cloudiness will continue to rotate around the
periphery of the upper level ridge tonight. As the frontal
system crosses the region later tonight, expect additional
cloudiness to enter the region with the focus of the most cloud
cover over northeastern portions of the forecast area. It is
this region where mesoscale models are suggesting the
possibility of a stray shower very late tonight into early
Friday morning. The probability of this remains low, so have
opted not to include in the forecast at this time.

With a southwesterly gradient, expect temperatures to be
slightly higher then last night. Look for overnight lows to be
mainly in the upper 40s to mid 50s from northeast to southwest.

Short term Friday night
The warmth pours in on Friday. H8 temperatures as high as +15c
and plenty of sunshine will yield high temperatures in most
locations in the 80s, even much of the coastline due to an
offshore breeze. There will be an onshore component in the
penobscot bay region so daytime highs will hold in the 70s along
portions of the midcoast. A few towns in southern new hampshire
may nudge 90 degrees.

With a well mixed layer and an increased gradient, expect winds
to be gusty from the west on Friday.

There will be sufficient instability as CAPE values increase
Friday to allow for a stray shower or thunderstorm. The focus
will be in the mountains which will be in the closest proximity
to an approaching backdoor cold front.

As this backdoor cold front slips south Friday night, expected
scattered showers and possibly a rumble of thunder to advect
into central portions of maine and the northern half of new
hampshire. It will still be mild at this point with mid 50s for
overnight lows in the north to lower to mid 60s in the south.

Long term Saturday through Thursday
Long range models in fairly good agreement for the up coming holiday
weekend...

cold front situated over central new hampshire and maine Saturday
morning will drop south through the day... Eventually stalling over
southern new england by late in the day. The front will be the
focus of morning showers and enough instability should develop ahead
of this boundary for afternoon convection across southern new
hampshire and extreme southwest maine. Not looking for anything
severe as shear rather weak and freezing levels high but pwat's
approaching 1.5 inches will likely produce heavy rainfall with
these storms. Should see a sharp contrast in afternoon highs with
mid to upper 80s across southern new hampshire and southwest maine
and upper 60s to upper 70s across the remainder of the forecast area.

Convection will come to an end Saturday evening as the front shifts
south of new england and stalls. High pressure building in from the
northeast will increase an onshore flow behind the front overnight
with fog and ocean stratus likely across southern new hampshire and
southwest maine after midnight. Weak shallow shortwave approaching
from the west may kick off a few showers after midnight but most of
this activity should be across southern new england in the vicinity
of the stalled front. Lows overnight will range from the mid 40s to
lower 50s north and lower to mid 50s in the south.

High pressure will remain nosed into the region from the east on
Sunday with a moist onshore flow continuing in southern zones. With
varying amounts of cloud above the stratus in southern sections...

hard to say if this moisture will mix out during peak heating so
generally looking for a mostly cloudy day in these areas. Farther
north and east looking for variable cloudiness. Temperatures across
the region will be fairly uniform in inland locations... Reaching the
lower to mid 60s. Readings along the coast will be capped in the mid
to upper 50s.

Shortwave approaching from the west Sunday night will drive a warm
front toward northern zones overnight. This will bring a chance of
showers into northern zones toward daybreak on Monday. Remainder of
the forecast area will become socked in with ocean stratus as
onshore flow continues. Lows overnight will range through the 40s
to near 50.

Warm front will hang up to the west of the forecast area on Monday
keeping moist marine layer in place over the region through the day.

Will see a continuing chance of showers in the north through midday
with just areas of drizzle elsewhere. Highs will range through the
60s to near 70 in the connecticut valley.

A cold front will drop south from canada Monday night bringing a
chance of showers overnight... Mainly in northern zones. Northwest
flow behind the front will clear ocean stratus after midnight.

Lows will range from the mid 40s to mid 50s.

Tuesday and midweek looking fair as high pressure settles in from
the northwest and shifts offshore on Wednesday. Looking for similar
temps both days ranging through the 70s to near 80.

Aviation 23z Thursday through Tuesday
Short term... MainlyVFR conditions tonight and Friday, with
localized ifr conditions in scattered showers or storms in the
mountains during the day Friday. MVFR and ifr conditions begin
to expand into central areas Friday night as the backdoor cold
front slips south.

Expect llws for a period tonight in the vicinity of the warm
front.

Long term...

vfr Saturday. Ifr lifr ceilings developing Saturday night in
southern new hampshire and southwest maine. Areas of MVFR ifr
ceilings in southern zones Sunday. Widespread ifr lifr
ceilings vsby Sunday night. Ifr lifr ceilings Monday. Becoming
vfr Monday night.VFR Tuesday.

Marine
Short term... Scas remain in effect for tonight through Friday
night as the gradient increases and seas build. Have expanded
the scas for this period for penobscot bay. In casco bay, have
issued scas for late this evening and the overnight hours.

Borderline situation for Friday and the scas in casco bay may
need to be extended.

Long term...

no problems noted.

Fire weather
Friday will be similar to today with temperatures climbing even
warmer. A westerly gradient will increase, preventing a sea
breeze from forming and allowing the rh to fall to below 30%
across portions of the area. Through collaboration on the fuel
and green up conditions with maine and new hampshire, have
opted to issue an sps for both states for the elevated fire
weather conditions.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... Small craft advisory from 11 pm this evening to 6 am edt
Friday for anz153.

Small craft advisory from 11 pm this evening to 8 pm edt
Friday for anz150>152-154.

Pohl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 24 mi46 min 55°F 50°F1017.3 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 29 mi44 min SSW 14 G 18 53°F 52°F4 ft1016.8 hPa (-1.6)47°F
44032 - Buoy E0104 - Central Maine Shelf 35 mi90 min S 12 G 14 51°F 49°F3 ft1016.5 hPa

Wind History for Wells, ME
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wiscasset Airport, ME14 mi41 minSSW 810.00 miFair55°F45°F69%1017.9 hPa
Auburn-Lewiston, ME20 mi38 minSSE 1110.00 miFair58°F48°F70%1018.2 hPa

Wind History from IWI (wind in knots)
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Last 24hr4E3E5CalmCalmCalmCalmE5E3CalmCalmCalmS455S7SE10
G14
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1 day agoCalmCalmCalmSW3S3SW7SW83SW3SW3CalmCalm344Calm656SW11
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SW84E8E6
2 days agoS4CalmS5CalmCalmCalmCalmCalmCalmCalmCalmCalmE3E5E5SE6S64S65S4SW7SW3SE3

Tide / Current Tables for Brunswick, Androscoggin River, Kennebec River, Maine
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Brunswick
Click for Map
Thu -- 02:52 AM EDT     Moonset
Thu -- 05:05 AM EDT     Sunrise
Thu -- 06:02 AM EDT     0.26 feet Low Tide
Thu -- 10:15 AM EDT     4.04 feet High Tide
Thu -- 02:57 PM EDT     Moonrise
Thu -- 06:31 PM EDT     0.05 feet Low Tide
Thu -- 08:08 PM EDT     Sunset
Thu -- 10:53 PM EDT     4.15 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.52.82.11.40.80.40.30.723.3443.63.12.31.50.90.40.10.21.12.63.84.1

Tide / Current Tables for Upper Hell Gate (Sasanoa River, Maine) Current
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Upper Hell Gate (Sasanoa River
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Thu -- 01:44 AM EDT     -0.76 knots Max Ebb
Thu -- 02:51 AM EDT     Moonset
Thu -- 05:04 AM EDT     Sunrise
Thu -- 05:32 AM EDT     0.00 knots Slack
Thu -- 09:30 AM EDT     0.85 knots Max Flood
Thu -- 12:02 PM EDT     -0.00 knots Slack
Thu -- 02:08 PM EDT     -0.86 knots Max Ebb
Thu -- 02:57 PM EDT     Moonrise
Thu -- 05:59 PM EDT     0.00 knots Slack
Thu -- 08:07 PM EDT     Sunset
Thu -- 10:11 PM EDT     1.02 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.2-0.7-0.8-0.6-0.5-0.20.20.70.80.80.80.60-0.6-0.9-0.8-0.6-0.400.50.9110.9

Weather Map and Satellite Images
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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.
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Wind Forecast for Gray/Portland, ME (19,4,5,8)
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Ground Weather Radar Station Portland, ME
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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.