Saturday, July20, 2019 L-36.com


Marine Weather and Tides
Topsham, ME

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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 5:14AMSunset 8:18PM Saturday July 20, 2019 6:50 PM EDT (22:50 UTC) Moonrise 10:36PMMoonset 8:41AM Illumination 85% Phase: Waning Gibbous; Moon at 19 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- 312 Pm Edt Sat Jul 20 2019
Tonight..SW winds 5 to 10 kt. Seas 1 to 2 ft.
Sun..W winds 5 to 10 kt. Seas 1 to 2 ft in the morning, then 1 foot or less. A chance of showers and tstms in the afternoon. Some tstms may produce gusty winds in the afternoon.
Sun night..NW winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less. A chance of showers and tstms in the evening. Some tstms may produce gusty winds in the evening.
Mon..NE winds around 5 kt, becoming se in the afternoon. Seas 1 foot or less. A chance of showers in the afternoon.
Mon night..SE winds around 5 kt, becoming ne after midnight. Seas 1 foot or less, then 1 to 2 ft after midnight. Showers likely in the evening, then showers after midnight. Patchy fog. Vsby 1 to 3 nm.
Tue..N winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog in the morning. Showers. Vsby 1 to 3 nm in the morning.
Tue night..W winds around 5 kt. Seas 1 to 2 ft. A chance of showers in the evening.
Wed..SW winds around 5 kt. Seas 1 to 2 ft. A chance of showers.
Wed night..W winds around 5 kt. Seas 1 foot or less.
Thu..W winds around 5 kt. Seas 1 foot or less.
Thu night..SW winds around 5 kt. Seas 1 foot or less. Winds and seas higher in and near tstms.
ANZ100 312 Pm Edt Sat Jul 20 2019
Synopsis for stonington me to merrimack river ma out to 25 nm.. A cold front drops south out of canada on Sunday and crosses the gulf of maine Sunday night. It will stall south of cape cod on Monday with low pressure tracking east along in Monday night. &&


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 201928
afdgyx
area forecast discussion
national weather service gray me
328 pm edt Sat jul 20 2019

Synopsis
Hot and humid weather continues into Sunday, but a cold front
will drop down out of canada during the day on Sunday. This
could trigger some showers and thunderstorms as it does so and
will eventually bring an end to the hot and humid weather.

Cooler and drier air moves in by Monday. Low pressure tracking
near the southern new england coastline Monday night will spread
some rain through the region. The cool and comfortable
temperatures continue through the end of the week but with a
gradual warming trend.

Near term tonight
It will be a balmy night tonight as the humid air mass won't
allow the temperature to cool off that much. Most areas will see
lows in the 70s, with upper 70s likely in southeast new
hampshire. Thunderstorms forming to our west today could roll
into the area overnight. At this time it seems northern areas
will be most favored for this activity, though it cannot be
ruled out elsewhere.

Short term Sunday and Sunday night
A cold front will be dropping into the area on Sunday. Models
still not agreeing that well on timing of this front considering
how close we are to its arrival. Part of the issue will involve
convection along the front, the outflow of which will push it
forward faster. The best consensus at this time favors the front
moving into northern areas in the morning with showers and
thunderstorms along it. It will then push southward through the
day, perhaps seeing a better push across western maine. Ahead of
the front the hot and humid air mass remains in place and with a
stronger westerly flow the hot temperatures will be observed
closer to the coast as well. But with cloud cover from
convection around it is possible that temperatures might not
reach the extremes they otherwise could. Will maintain the
current heat headlines as they are, though it is possible that
northern areas could be dropped from the heat advisory once
today's heat ends. Thunderstorms on Sunday could approach severe
levels given the very hot and humid air mass and good mid level
wind flow. Outflow winds will be the biggest concern from the
storms. While heavy downpours are possible, it does not look
like flash flooding will be a threat due to quick storm
movement. These should exit the coast with the cold front in the
evening on Sunday with cooler and drier air being felt already
Sunday night. Low temperatures will primarily be in the 60s but
50s will be common in the north.

Long term Sunday night through Saturday
Cooler and drier air will enter maine and new hampshire Sunday
night, following the passage of a cold front. Dew points will
fall through the 60s during the night with even some 50s dew
points appearing in the mountains. Air temperatures will be
about 15 degrees cooler then over the weekend, mostly in the 70s
to lower 80s for afternoon highs.

Clouds will increase and thicken on Monday as a large scale
trough approaches from the west. This upper level trough will
trigger cyclogenesis in the mid atlantic region during the day,
spreading showers or a period of rain to much of southern and
central maine and new hampshire.

Models coming into better agreement indicating low pressure
crossing through new england Monday night. The surface low will
track near the coastline and the h8 front. Showers will cross
the region. Sufficient instability aloft may trigger
thunderstorms as well. Plenty of moisture in the atmosphere and
precipitable waters near 2 inches will combine with favorable
dynamics to produce locally heavy rainfall Monday evening and
during a portion of the overnight hours. Over an inch of
rainfall is possible over southern and central areas with
locally higher amounts possible in any persistent heavier
showers.

The precipitation continues on and off through the midday hours
on Tuesday before tapering off. An upper level trough will
provide for a chance of a brief shower or two right through much
of the work week. This precipitation will mainly be diurnally
driven and mainly in the north and mountains. A gradual warming
trend can be expected towards the end of the week, albeit not
nearly as warm as this past weekend.

Aviation 19z Saturday through Thursday
Short term...VFR conditions expected for the most part. However,
a cold front will be dropping down from the north on Sunday
which will trigger some showers and thunderstorms. These will be
most likely in northern and eastern areas.

Long term... Areas of MVFR or ifr conditions developing in low
clouds and locally heavy rainfall for all terminals beginning
late Monday in the west and spreading east Monday evening.

Conditions gradually improve toVFR on Tuesday, however a brief
shower may occur. A small chance for showers will continue for
much of the work week. However, this will likely be diurnally
driven and mainly in the north.

Marine
Short term... Southwest flow continues until the cold front
arrives Sunday night. High pressure builds in behind it.

Long term... A front drops south of the area Sunday night and
stalls south of the area through early next week as low
pressure tracks northeast along it. There will be periods of
heavy rain and fog over the waters during this time.

Climate
Hot temperatures this weekend could approach record levels. The
record highs are as follows:
july 20
concord: 101 in 1977
portland: 96 in 1949
augusta: 98 in 1991
july 21
concord: 101 in 1977
portland: 99 in 1977
augusta: 94 in 1994

Gyx watches warnings advisories
Me... Heat advisory until 7 pm edt Sunday for mez012>014-019>028.

Excessive heat warning until 7 pm edt Sunday for mez018.

Nh... Heat advisory until 7 pm edt Sunday for nhz002>007-009-011-014.

Excessive heat warning until 7 pm edt Sunday for nhz008-010-
012-013-015.

Marine... None.

Near term... Kimble
short term... Kimble
long term... Cannon


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 24 mi56 min 81°F 62°F
44007 - PORTLAND 12 NM Southeast of Portland,ME 29 mi60 min S 9.7 G 12 71°F 66°F2 ft1004.9 hPa (-1.4)69°F
44032 - Buoy E0104 - Central Maine Shelf 35 mi106 min SW 7.8 G 9.7 67°F 64°F2 ft1004.6 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wiscasset Airport, ME14 mi57 minVar 610.00 miFair88°F69°F54%1005.5 hPa
Auburn-Lewiston, ME20 mi54 minSW 810.00 miFair90°F73°F58%1006.3 hPa

Wind History from IWI (wind in knots)
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Last 24hrS5S6S3CalmCalmCalmCalmCalmW3CalmCalmCalmCalmW3Calm4W64W54S6SW8S76
1 day agoSE33CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE4SE45S7SE7S9S6S6SW86S6
2 days ago3S34CalmCalmCalmCalmCalm3Calm5364444Calm536S85S5

Tide / Current Tables for Brunswick, Androscoggin River, Kennebec River, Maine
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Upper Hell Gate (Sasanoa River, Maine) Current
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Upper Hell Gate (Sasanoa River
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Sat -- 02:26 AM EDT     0.88 knots Max Flood
Sat -- 05:14 AM EDT     Sunrise
Sat -- 06:30 AM EDT     -0.00 knots Slack
Sat -- 08:38 AM EDT     -0.91 knots Max Ebb
Sat -- 08:40 AM EDT     Moonset
Sat -- 12:26 PM EDT     0.00 knots Slack
Sat -- 03:00 PM EDT     0.83 knots Max Flood
Sat -- 07:08 PM EDT     -0.00 knots Slack
Sat -- 08:15 PM EDT     Sunset
Sat -- 08:59 PM EDT     -0.69 knots Max Ebb
Sat -- 10:34 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.60.90.80.70.60.3-0.3-0.8-0.9-0.7-0.5-0.20.30.70.80.80.70.50.1-0.5-0.7-0.5-0.3

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 (18,4,5,8)
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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.