Tuesday, April7, 2020
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Marine Weather and Tides
Kittery Point, 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 6:11AMSunset 7:18PM Tuesday April 7, 2020 8:16 AM EDT (12:16 UTC) Moonrise 6:52PMMoonset 6:21AM Illumination 100% Phase: Full Moon; Moon at 14 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- 649 Am Edt Tue Apr 7 2020
Today..NW winds up to 10 kt, becoming S this afternoon. Seas 2 to 3 ft.
Tonight..S winds up to 10 kt, becoming ne after midnight. Seas 2 to 3 ft.
Wed..NE winds 10 to 15 kt, becoming 5 to 15 kt in the afternoon. Seas 2 to 3 ft. A chance of rain in the morning.
Wed night..SE winds 5 to 10 kt. Seas around 2 ft.
Thu..SE winds 10 to 15 kt, becoming S 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 2 to 3 ft, building to 5 to 8 ft in the afternoon. Rain.
Thu night..W winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 9 ft. Rain likely.
Fri..W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Fri night..NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Sat..W winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Sat night..W winds 10 to 15 kt with gusts up to 20 kt. Seas 1 foot or less.
ANZ100 649 Am Edt Tue Apr 7 2020
Synopsis for stonington me to merrimack river ma out to 25 nm.. A weak cold front will pass south across the waters this evening. Thereafter, an area of low pressure is expected to pass just south of new england on Wednesday followed by a more significant low pressure system moving into the gulf of maine for Thursday. &&


7 Day Forecast for Marine Location Near Kittery Point CDP, ME
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location: 43.06, -70.7     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 071127 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 727 AM EDT Tue Apr 7 2020

SYNOPSIS. Fair weather is expected through today. A low pressure system will pass south of the area late tonight and early Wednesday bringing clouds with showers across the southern New Hampshire. A stronger system will move through on Thursday with widespread rain expected likely changing to heavy wet snow late Thursday and Thursday night in the mountains and perhaps the foothills. Unsettled weather with a chance of rain and snow showers will linger behind this system For Friday and the start of the weekend.

NEAR TERM /UNTIL 6 PM THIS EVENING/. 650 AM Update . Just a few minor adjustments to temperatures at this time based on latest trends in observational data. Otherwise, forecast remains on track.

Previously .

A weak cold front will push through the area today but moisture is very limited and forcing for ascent very weak. Therefore we don't expect anything more than a few periods of bkn cloud cover and perhaps a brief shower in the mountains. Highs will once again be in the 50s at most locations today with some lower 60s in the south.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/. A short wave trough will approach from the west in the northwesterly flow aloft. Consensus in the 00z deterministic models and latest ensembles is that some light QPF will fall across southern NH from this late tonight into Wednesday morning, some of which could be some wet snowflakes in the Monadnocks. However, not looking like a big deal with generally less than 0.15" QPF expected. There may be a sharp north-south gradient to the cloud shield with mostly clear skies a possibility across the north late Tuesday night and Wednesday. Highs on Wednesday will be colder than the last few days, with readings mainly in the 40s.

LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/. Overview: The long term period begins with increasing chances for precipitation as a potent low pressure system approaches from Canada, bringing a widespread rainfall to the region Thursday. Secondary low development in the Gulf of Maine Thursday evening, possibly right along the coast, may allow for a changeover from rain to snow for much of the region late Thursday into early Friday morning. The northern ME mountains and higher elevations in northern NH could see a significant accumulation with much lesser amounts elsewhere. Precipitation lingers Friday before high pressure builds in for the weekend and another system approaches for the beginning of the work week.

Impacts: It looks increasingly likely that the northern ME mountains and higher elevations in northern NH will see a significant snowfall Thursday night. In fact, we have issued a Winter Storm Watch for our northwest ME zones with this forecast package. Confidence remains low on specific amounts as well as the potential for any accumulation elsewhere in the CWA. We will continue to monitor trends for this portion of the forecast.

Forecast Details: High pressure briefly nudges into New England Wednesday night, but by Thursday morning, a potent, complex area of low pressure is expected to be straddling the Ontario/Quebec border. it then pushes southeast toward New England during the morning hours and precipitation will quickly spread eastward through our region. Temperatures will be warm enough outside of the highest elevations in the mountains for any precipitation to fall as rain during the day and amounts of 0.5-0.75 inch are expected through Thursday evening.

For Thursday night, it looks increasingly likely that some portions of our region will see a significant late season snowfall. The latest deterministic ECMWF and GFS runs are in good agreement that a secondary area of low pressure will form over the Gulf of Maine Thursday evening, though the ultimate track of the low is still uncertain. However, if the secondary low does form, it will begin to draw in colder air on its western side and allow a changeover to snow for many locations outside the mountains. The western ME mountains and the higher elevations in northern NH will likely be snowing already, but it is possible that much of the region, outside of southern NH and the immediate ME coast, also changes to snow for a period Thursday night. Overall, this scenario puts the western ME mountains in the crosshairs of a possible warning-level snow event Thursday into Friday and have issued a Winter Storm Watch for the area in anticipation; periods of heavy, wet snow could lead to power outages. Specific amounts for this event remain uncertain as the track of the secondary low and surface temperatures will have a large influence on how this ultimately unfolds . but the current forecast gives at least a dusting of snow to almost our entire region Thursday night. Will continue to monitor trends over this portion of the forecast.

Light rain or snow showers continue on Friday as the low pressure system quickly moves away to the northeast. High pressure briefly builds into the region this weekend, but another storm system could affect our region in the early part of next week.

AVIATION /12Z TUESDAY THROUGH SATURDAY/. Short Term . VFR conditions expected today through Wednesday, with a brief period of MVFR cigs possible across southern NH late tonight and Wednesday morning. Otherwise, a seabreeze will likely form today and turn winds onshore at PSM and RKD. There may be a little more resistance at PWM, but it's a possibility late in the afternoon.

Long Term . MVFR conditions likely to begin Thursday morning deteriorate to IFR conditions for all but the southernmost NH terminals late Thursday as rain changes to snow. Winds become northwesterly on Friday in the wake of a departing low pressure system and VFR conditions are expected late Friday and Saturday.

MARINE. Short Term . Winds and seas are expected to remain below SCA thresholds today and Wednesday. A seabreeze is expected to develop today turning nearshore winds onshore this afternoon.

Long Term . SCAs likely for the outer waters Thursday night into Friday as potent low pressure system crosses the waters and a coastal system develops.

FIRE WEATHER. Dry conditions will remain in place through today. While RH will likely mix out to around 20% again today, winds will be lighter than on Monday. Fine fuels will continue to dry out which may still result in elevated fire danger.

HYDROLOGY. Rivers remain somewhat high due to recent heavy rainfall. The next system on Thursday may produce more than an inch of rain (where it doesn't snow) so rivers will probably be on the rise again by late Thursday. Thereafter, we'll have to see if the train of high-amplitude short waves continues as we may have another substantial rain event Monday of next week.

TIDES/COASTAL FLOODING. Starting Wednesday night . we'll have several days of astronomical high tides that will be within one-half foot of flood stage. Given the expected onshore flow with an approaching storm, we'll see some surge added to at least several of those high tides. Thus it's likely we'll see coastal flood headlines for several of those high tide cycles. The timing and strength of the onshore flow will dictate how much surge . and ultimately the potential flooding . splash-over and erosion we'll see.

EQUIPMENT. The last GYX upper air observation was March 25 at 12Z. Unfortunately, a disruption in gas supply has temporarily halted observations from GYX. The order has been placed but a date of delivery remains TBD.

The Sugarloaf NWR transmitter remains off the air with an unknown restoration time.

GYX WATCHES/WARNINGS/ADVISORIES. ME . Winter Storm Watch from Thursday morning through Friday afternoon for MEZ007>009-012>014. NH . None. MARINE . None.



NEAR TERM . Ekster SHORT TERM . Ekster LONG TERM . Watson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
IOSN3 - Isle of Shoals, NH 8 mi16 min WNW 9.9 G 11 43°F 1011.7 hPa (+0.9)25°F
44073 9 mi132 min W 9.7 G 14 44°F 43°F
44030 - Buoy B0102 - Western Maine Shelf 17 mi72 min WNW 5.8 G 7.8 3 ft1013.3 hPa
WELM1 - 8419317 - Wells, ME 19 mi46 min NNW 5.1 G 6 42°F 42°F1012.4 hPa
WEXM1 - Wells Reserve, ME 21 mi76 min WNW 1.9 38°F 21°F
44098 - Jeffrey's Ledge, NH (160) 34 mi68 min 42°F3 ft
44029 - Buoy A0102 - Mass. Bay/Stellwagen 38 mi72 min NW 7.8 G 9.7 44°F 42°F3 ft1010.4 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 44 mi26 min NNE 5.8 G 7.8 43°F 42°F2 ft1012.1 hPa (+1.2)33°F
CASM1 - 8418150 - Portland, ME 48 mi46 min 42°F 43°F
44013 - BOSTON 16 NM East of Boston, MA 49 mi26 min W 7.8 G 9.7 45°F 43°F2 ft1012.1 hPa (+0.7)36°F

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH7 mi80 minW 610.00 miMostly Cloudy39°F24°F55%1011.8 hPa
Rochester - Skyhaven Airport, NH19 mi25 minNW 510.00 miFair45°F23°F42%1011.9 hPa
Sanford, Sanford Regional Airport, ME23 mi20 minN 010.00 miFair42°F27°F55%1012.8 hPa

Link to 5 minute data for KPSM

Wind History from PSM (wind in knots)
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Last 24hrNW7NW7N9--NW8
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W11W9NW8W3CalmCalmCalmCalmW6SW4W6SW4SW4SW3W6NW5
1 day agoSE6S8S6SE3SE10SE12SE10SE13SE9SE8S7SE5CalmCalmCalmW4W6CalmW4W5W5W7W6NW9
2 days agoN8N7E8E8E7E7SE7SE6SE6E5SE7S4SE4CalmS3CalmCalmCalmCalmCalmCalmCalmSE3SE5

Tide / Current Tables for Gerrish Island, Portsmouth Harbor, New Hampshire
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Gerrish Island
Click for Map
Tue -- 04:49 AM EDT     -1.07 feet Low Tide
Tue -- 06:13 AM EDT     Sunrise
Tue -- 06:20 AM EDT     Moonset
Tue -- 11:05 AM EDT     10.53 feet High Tide
Tue -- 05:15 PM EDT     -1.28 feet Low Tide
Tue -- 06:52 PM EDT     Moonrise
Tue -- 07:16 PM EDT     Sunset
Tue -- 10:35 PM EDT     Full Moon
Tue -- 11:30 PM EDT     10.64 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

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96.83.91.2-0.6-1.1-0.124.97.79.710.5108.15.32.3-0.1-1.2-0.90.83.66.69.110.5

Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
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Portsmouth Harbor Entrance
Click for Map
Tue -- 12:33 AM EDT     -0.00 knots Slack
Tue -- 03:22 AM EDT     -2.28 knots Max Ebb
Tue -- 06:13 AM EDT     Sunrise
Tue -- 06:20 AM EDT     Moonset
Tue -- 07:05 AM EDT     0.00 knots Slack
Tue -- 09:15 AM EDT     1.64 knots Max Flood
Tue -- 12:51 PM EDT     -0.00 knots Slack
Tue -- 03:45 PM EDT     -2.43 knots Max Ebb
Tue -- 06:52 PM EDT     Moonrise
Tue -- 07:16 PM EDT     Sunset
Tue -- 07:28 PM EDT     0.00 knots Slack
Tue -- 09:43 PM EDT     1.79 knots Max Flood
Tue -- 10:35 PM EDT     Full Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.5-0.5-1.6-2.2-2.2-1.8-1.1-0.111.61.51.10.7-0.1-1.3-2.2-2.4-2.1-1.5-0.60.71.61.81.4

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 (8,2,3,4)
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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 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.