Wednesday, May23, 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 8:09PM Wednesday May 23, 2018 6:32 AM EDT (10:32 UTC) Moonrise 1:51PMMoonset 2:22AM Illumination 61% Phase: Waxing Gibbous; Moon at 8 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- 333 Am Edt Wed May 23 2018
Today..W winds around 5 kt, increasing to 5 to 10 kt with gusts up to 20 kt this afternoon. Seas 1 to 2 ft this morning, then 1 foot or less. A slight chance of showers this afternoon.
Tonight..NE winds 5 to 10 kt. Seas 1 foot or less.
Thu..E winds around 5 kt, becoming S 5 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon.
Thu night..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri..W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri night..W winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
Sat..N winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
Sat night..E winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
Sun..E winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers.
Sun night..E winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
ANZ100 333 Am Edt Wed May 23 2018
Synopsis for stonington me to merrimack river ma out to 25 nm.. A cold front will cross the region today with showers and Thunderstorms possible for the eastern waters. A warm front will cross the region late Thursday and Thursday night. A backdoor cold front will move southward across the waters over the weekend.

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 230752
afdgyx
area forecast discussion
national weather service gray me
352 am edt Wed may 23 2018

Synopsis
A cold front will drop south across the area today producing
scattered showers and thunderstorms across northern and
eastern portions of the forecast area. High pressure will build
into the region Thursday and Friday with very warm weather
expected. A backdoor cold front drops into the region this
weekend and will likely provide for some unsettled weather.

Near term until 6 pm this evening
One short wave trough passing through northern new england early
this morning will bring an end to the shower activity early on.

In the wake of this short wave trough downsloping flow will
allow temperatures to rise well into the 70s and even lower 80s
across central and southern zones. However, another short wave
trough will graze northern and eastern zones today. Scattered
showers and thunderstorms will likely be the result
today... Especially over mid coast zones. The most likely time
period for this will be during the afternoon hours.

Forecast thermodynamic profiles will be favorable for gusty
winds and small hail in any thunderstorms. Have included this
enhanced wording in the forecast for today.

Short term 6 pm this evening through 6 pm Thursday
Fair weather is expected tonight through Thursday with high
pressure moving into the region. Temperatures on Thursday will
be in the 65-75 degree range depending on location... Warmest
south.

Long term Thursday night through Tuesday
The week will culminate with the warming trend we've seen since mid
week pushing high temperatures on Friday well into the 80s across
the region.

Overall looking like a hot, dry, and windy day on Friday. With
forecast soundings supporting mixing to nearly 750mb (~7000 ft)
have trended the entire forecast towards this concept and
increased high temperatures, increased winds, and decreased dew
points to reflect the drier and moving down into the region.

Across interior southern nh 90f is possible. With westerly flow
resulting in downsloping and helping to keep the sea breeze at
bay have increased temperatures a bit above guidance for the
entire region as we make our first run at 90f.

Saturday afternoon a warm front will sag southward across the
region. This will be a relatively weak boundary with little moisture
however some afternoon showers or thunderstorms are possible. Have
limited pop to high chance as areal coverage is still
uncertain.

On Sunday we see north to northeasterly flow set up through the
region as front becomes a backdoor front slipping southward. The
result will be much cooler temperatures than the prior days
with much of the area staying in the 60s or even upper 50s. The
ct river valley will be the exception where the mountains will
prevent the northeasterly flow from arriving and the valley will
assist in funneling warm air northwards allowing temperature to
climb back to the mid 70s.

Rain chances become increasingly likely on Sunday and into Monday.

Here a low pressure system will move out of the canadian
prairies and help to induce widespread showers across the
region. The exact timing and amount of precipitation are low
confidence at this point due to the upper level flow. After the
end of the week the high pressure aloft has moved east and split
flow tries to develop with a cut off over the southeastern us.

This continue to introduce a lot of uncertainty for the end of
the weekend; uncertainty which is unlikely to be resolved for
another 36 to 48 hours when the northern stream wave will begin
to form over the yukon. For now have left high chance pops in
for the entire Sunday - Monday period.

Aviation 07z Wednesday through Sunday
Short term... Areas of MVFR conditions will give way toVFR this
morning.VFR conditions are then expected today and tonight with
the exception of localized MVFR conditions across the mountains
and mid coast in scattered showers and thunderstorms this
afternoon.

Long term...

high pressure and warm conditions will keepVFR conditions from
Thursday night into Saturday morning. Saturday afternoon some
scattered convection may result in MVFR showers in the
mountains. Further showers and lowering ceilings are expected on
Sunday and remaining into Monday as low pressure begins to move
into the region.

Marine
Short term through Thursday ... Winds and seas expected to
remain below SCA level through Thursday.

Long term...

gusty westerly flow on Friday will bring the outer waters to
sca criteria as the pressure gradient between the departing low
pressure and building high to our south increase winds. A
backdoor front will cross the region on Saturday switching flow
to the northeast. Periods of showers with fog possible on Sunday
and into Monday.

Fire weather
Today and tomorrow will be mostly dry. By Thursday rh values
will fall to 25% across most of the area however the winds will
be quite light.

Friday will see gusty west to northwesterly flow around 25kt.

These winds will help to mix down dry air from aloft with rh
dropping to around 30% across southern new hampshire. This will
put southern nh near red flag criteria and will need to be
watched for possible fire wx headlines.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... None.

Near term... Ekster
short term... Ekster
long term... Curtis


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 24 mi51 min 56°F 50°F1010.8 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 29 mi43 min SW 5.8 G 5.8 51°F 49°F3 ft1010.3 hPa (-0.7)51°F

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 mi40 minN 010.00 miMostly Cloudy52°F52°F100%1010.9 hPa
Auburn-Lewiston, ME20 mi2.6 hrsN 010.00 miOvercast53°F50°F89%1011.9 hPa

Wind History from IWI (wind in knots)
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Last 24hrCalmE3E5E5SE6S64S65S4SW7SW3SE3CalmCalmCalmSW3S3SW7SW83SW3SW3Calm
1 day agoW35W64--54
G14
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SW9SW5S4CalmS5CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoSW8SW5SW8SW645CalmCalm3CalmNW8
G16
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5CalmCalm63W4NW3CalmCalmCalmCalmCalm

Tide / Current Tables for Brunswick, Androscoggin River, Kennebec River, Maine
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Brunswick
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Wed -- 02:22 AM EDT     Moonset
Wed -- 04:54 AM EDT     0.31 feet Low Tide
Wed -- 05:06 AM EDT     Sunrise
Wed -- 09:07 AM EDT     4.11 feet High Tide
Wed -- 01:50 PM EDT     Moonrise
Wed -- 05:30 PM EDT     -0.01 feet Low Tide
Wed -- 08:07 PM EDT     Sunset
Wed -- 09:53 PM EDT     4.06 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.821.30.80.40.30.92.23.54.143.73.12.31.50.80.300.11.12.63.74.13.9

Tide / Current Tables for Upper Hell Gate (Sasanoa River, Maine) Current
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Upper Hell Gate (Sasanoa River
Click for Map
Wed -- 12:43 AM EDT     -0.79 knots Max Ebb
Wed -- 02:21 AM EDT     Moonset
Wed -- 04:25 AM EDT     0.00 knots Slack
Wed -- 05:05 AM EDT     Sunrise
Wed -- 07:05 AM EDT     0.88 knots Max Flood
Wed -- 11:02 AM EDT     -0.00 knots Slack
Wed -- 01:10 PM EDT     -0.92 knots Max Ebb
Wed -- 01:49 PM EDT     Moonrise
Wed -- 05:01 PM EDT     0.00 knots Slack
Wed -- 08:06 PM EDT     Sunset
Wed -- 09:02 PM EDT     0.97 knots Max Flood
Wed -- 11:46 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.8-0.6-0.4-0.20.30.70.90.80.80.60-0.6-0.9-0.8-0.6-0.4-00.50.9110.90.5

Weather Map and Satellite Images
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wmap_A
GOES Local Image of    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 (6,6,7,8)
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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.