Thursday, July2, 2020
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Marine Weather and Tides
Damariscotta, ME

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:00AMSunset 8:27PM Thursday July 2, 2020 2:50 PM EDT (18:50 UTC) Moonrise 6:02PMMoonset 2:45AM Illumination 92% Phase: Waxing Gibbous; Moon at 12 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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ANZ152 Coastal Waters From Port Clyde, Me To Cape Elizabeth, Me Out 25 Nm- 1157 Am Edt Thu Jul 2 2020
.small craft advisory in effect from late tonight through Friday afternoon...
This afternoon..SW winds 5 to 10 kt. Seas 3 to 4 ft.
Tonight..SW winds 5 to 10 kt, becoming N after midnight. Seas 3 to 4 ft. A chance of showers and tstms in the evening. Some tstms may produce gusty winds and heavy rainfall in the evening.
Fri..NE winds 10 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft.
Fri night..NE winds 5 to 10 kt. Seas 2 to 4 ft.
Sat..NE winds 5 to 10 kt, becoming se in the afternoon. Seas around 3 ft.
Sat night..S winds around 5 kt. Seas around 3 ft. Areas of fog after midnight with vsby 1 to 3 nm.
Sun..S winds 5 to 10 kt. Seas 3 to 4 ft.
Sun night..SW winds 5 to 10 kt. Seas 2 to 4 ft.
Mon..E winds 5 to 10 kt. Seas 2 to 4 ft.
Mon night..SW winds 5 to 10 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms.
ANZ100 1157 Am Edt Thu Jul 2 2020
Synopsis for stonington me to merrimack river ma out to 25 nm.. A cold front moves in from the north tonight with increasing easterly flow across the waters. High pressure then builds in for Friday and the first half of the weekend. &&


7 Day Forecast for Marine Location Near Damariscotta, ME
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location: 43.93, -69.42     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 021554 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 1154 AM EDT Thu Jul 2 2020

SYNOPSIS. Unsettled weather will be replaced by a warm and humid air mass today ahead of an approaching cold front. As the front collides with the humid air showers and thunderstorms will form. A few of these may be on the stronger side before convection dissipates around sunset. The front pushes south of the area Friday bringing with it cooler and drier air. Another cold front with showers and thunderstorms will cross northern New England Sunday.

NEAR TERM /THROUGH TONIGHT/. 1139 AM Update . Water vapor imagery shows cold front now crossing the St Lawrence River with returns showing up on KCBW radar. Primary changes with this update was to slightly increase PoPs over western Maine and to add heavy rain wording with 1.24 inches of PWAT on the 12Z KGYX sounding. The storms are expected to be fast moving, so not expecting flooding to be a primary threat, rather low visibility in downpours. Rest of the forecast remains on track with strong to severe storms breaking out in northeastern zones around 3 pm. Storms will track south to southwest towards the mid-coast expanding westward towards York County around 7 pm.

807 AM Update . Visibilities have improved over the past hour and expect areas still experiencing fog to improve over the next hour. Have allowed the Dense Fog advisory to expire as scheduled with this update.

7AM . Just a minor update for current temperatures. Fog is just starting to erode at the edges. Expect it to dissipate rapidly, so will leave the ending time for the Dense Fog advisory as is and reassess closer to expiration.

Prev disc..Currently dense fog has settled over much of the region. In NH and the Maine mountains it is mainly confined to the river valleys while along the coast and inland through the midcoast and Kennebec valley it is more widespread. A dense fog advisory remains in effect for the latter area. After sunrise expect the fog to lift, making way for a warm and partly sunny day.

An interesting scenario developing for this afternoon. A cold front will drop south through the region in the late afternoon. This front will provide the focus for thunderstorm development. In the southwest portion of the area, we'll have plenty of moisture and instability as temperatures in the Merrimack Valley climb to near 90 with 60 degree dewpoints. Expect some scattered convection in this area however this best instability reservoir remains southwest of the main forcing. Across eastern Maine expect a broken line of convection to develop along the front. This will likely extend into the eastern portion of our area through Lewiston. The sweet spot for severe potential seems centered on southern Somerset, Waldo, and Kennebec counties, in this area we have the forcing from the front along with the ability to tap a plentiful reservoir of moist unstable air from the southern portion of the area. Forecast soundings for AUG show, in addition to CAPE exceeding 1000 J/kg, a curved hodograph with helicity over 100 m^2/S^2. This provides some potential for right moving super cell type storms to develop in this region and move south and west towards Lewiston and Brunswick. Have added damaging wind wording to the forecast in this area where the theta-e difference from the core of the storms to the surface exceeds 20 K.

SHORT TERM /FRIDAY/. While the front will continue to drop southwest through the forecast area overnight the convection will wane after sunset with only scattered showers remaining. Overnight, fog will once again be a concern particularly south and west. Behind the front a drop in dewpoints and switch to northern flow after midnight will decrease fog coverage for the eastern portion of the forecast area.

Friday will be relatively cooler day with highs only reaching the 70s across the region. It will also be drier, keeping the threat to showers to a bare minimum in the mountains.

LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/. Will have to keep an eye on the backdoor boundary Sat as it may try and return Nwd as a warm front. This may also provide a focus for any shower activity during the day. Overall expecting Sat to be the drier of the two weekend days.

More moisture return . warmer temps . and stronger S/WV trof crossing the region are all expected Sun. Current forecasts suggest theta-e lapse rates approaching 5 C/km . which would produce theta-e differences on the order of 20 C in the lowest 4 km . favorable territory for downburst development. Add in a H5 jet streak in excess of 50 kt crossing the forecast area and we should see shear values approaching 30 kt too. If forecast trends hold . I would not be surprised to see at least a small severe threat emerge during the afternoon. But timing will be everything to maximize instability.

Into early next week heights begin rising again . and overall should greatly suppress afternoon convection compared to recent days. The next precip chances look to be towards midweek.

AVIATION /16Z THURSDAY THROUGH MONDAY/. Short Term . widespread dense fog is leaving most terminals in LIFR conditions this morning. Expect this fog to continue until just after daybreak at which point we'll see a quick return to VFR. This afternoon a front drops southwards through the area, bringing a threat for thunderstorms for AUG and as far south as PWM and RKD by nightfall. Overnight fog will again be a threat for NH with HIE and LEB expected to see river valley fog again. Friday will be mainly sunny with VFR holding through the day.

Long Term . Local IFR or lower conditions possible early Sat in valley fog. Widespread VFR Sat looks to be followed by more IFR in developing marine fog Sat night. Cold front approaches the area from the NW Sun and SHRA/TSRA will form along it. Local IFR conditions are possible in the heaviest SHRA/TSRA.

MARINE. Short Term . A cold front will drop south across the waters late this evening. Behind it expect easterly winds to develop and allow seas to build to 5ft on the outer waters with a few gusts to 25kts and a SCA has been issued for late tonight through midday Friday. Winds will subside as the front passes with high pressure building in for the start of the weekend.

Long Term . Winds and seas are expected to remain below SCA thresholds. Areas of marine fog are possible Sat night as warm and moist air returns Nwd.

GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . None. MARINE . Small Craft Advisory from 4 AM to 2 PM EDT Friday for ANZ150- 152-154.

SYNOPSIS . NEAR TERM . Schroeter SHORT TERM . Curtis LONG TERM . Legro AVIATION . Curtis/Legro MARINE . Curtis/Legro


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44032 - Buoy E0104 - Central Maine Shelf 15 mi107 min SSW 5.8 G 7.8 62°F 60°F4 ft1006.2 hPa
44033 - Buoy F0103 - West Penobscot Bay 24 mi107 min SSW 12 G 14 61°F 2 ft1005.7 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 47 mi61 min S 9.7 G 12 65°F 65°F3 ft1006.5 hPa (-0.8)65°F
CASM1 - 8418150 - Portland, ME 48 mi57 min 76°F 64°F

Wind History for Bar Harbor, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wiscasset Airport, ME15 mi58 minSSW 610.00 miFair80°F64°F60%1007 hPa
Rockland, Knox County Regional Airport, ME19 mi55 minSSW 810.00 miFair74°F66°F79%1006.9 hPa

Link to 5 minute data for KIWI

Wind History from IWI (wind in knots)
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Last 24hr4S6S63SE3CalmCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmSW44SW54S4S6SW7SW6
1 day ago3N64CalmNE4E5E4E6E5E5SE3E3CalmCalmCalmCalmCalmE3CalmCalmCalmCalm3S4
2 days agoE85E6E743NE33CalmCalmCalmCalmCalmCalm4NE4CalmNE4E6E43E4E4E4

Tide / Current Tables for Muscongus Harbor, Muscongus Sound, Maine
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Muscongus Harbor
Click for Map
Thu -- 02:44 AM EDT     Moonset
Thu -- 03:07 AM EDT     -0.43 feet Low Tide
Thu -- 04:59 AM EDT     Sunrise
Thu -- 09:15 AM EDT     9.24 feet High Tide
Thu -- 03:17 PM EDT     0.29 feet Low Tide
Thu -- 06:02 PM EDT     Moonrise
Thu -- 08:23 PM EDT     Sunset
Thu -- 09:31 PM EDT     10.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.72.10.3-0.40.11.74.16.68.49.28.97.65.53.11.20.30.62.14.57.29.410.610.69.5

Tide / Current Tables for Sheepscot River (off Barter Island), Maine Current
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Sheepscot River (off Barter Island)
Click for Map
Thu -- 12:56 AM EDT     -1.26 knots Max Ebb
Thu -- 02:45 AM EDT     Moonset
Thu -- 04:26 AM EDT     0.00 knots Slack
Thu -- 05:01 AM EDT     Sunrise
Thu -- 06:19 AM EDT     0.77 knots Max Flood
Thu -- 10:16 AM EDT     -0.00 knots Slack
Thu -- 01:10 PM EDT     -1.16 knots Max Ebb
Thu -- 04:35 PM EDT     0.00 knots Slack
Thu -- 06:03 PM EDT     Moonrise
Thu -- 06:43 PM EDT     0.99 knots Max Flood
Thu -- 08:24 PM EDT     Sunset
Thu -- 10:47 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.2-1.3-1.2-0.9-0.30.40.70.70.50.40.1-0.4-1-1.2-1.1-0.9-0.40.30.910.80.60.4-0.1

Weather Map
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wmap_A
GEOS 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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Gray/Portland, ME (14,3,4,5)
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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 numerous 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.