Wednesday, April8, 2020
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Marine Weather and Tides
Kittery, 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 6:10AMSunset 7:19PM Wednesday April 8, 2020 7:41 AM EDT (11:41 UTC) Moonrise 8:11PMMoonset 6:51AM Illumination 100% Phase: Full Moon; Moon at 15 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 Wed Apr 8 2020
.gale watch in effect from Thursday afternoon through Friday afternoon...
Today..NE winds 5 to 15 kt, becoming E this afternoon. Seas around 2 ft.
Tonight..SE winds 5 to 10 kt. Seas around 2 ft.
Thu..SE winds 10 to 20 kt with gusts up to 25 kt, increasing to 20 to 25 kt with gusts up to 35 kt in the afternoon. Seas 2 to 4 ft, building to 6 to 9 ft in the afternoon. A chance of rain in the morning, then rain in the afternoon with vsby 1 to 3 nm.
Thu night..W winds 20 to 30 kt with gusts up to 40 kt. Seas 6 to 9 ft. Rain in the evening with vsby 1 to 3 nm.
Fri..W winds 20 to 25 kt with gusts up to 40 kt. Seas 5 to 8 ft, subsiding to 3 to 5 ft in the afternoon.
Fri night..W winds 15 to 25 kt with gusts up to 30 kt. Seas 2 to 4 ft.
Sat..W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Sat night..W winds 10 to 15 kt with gusts up to 25 kt. Seas 1 foot or less.
Sun..SW winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft.
Sun night..S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers.
ANZ100 649 Am Edt Wed Apr 8 2020
Synopsis for stonington me to merrimack river ma out to 25 nm.. High pressure remains in control of the waters through the day today. Low pressure will approach from the west Thursday and rapidly strengthen along the maine coast during the day. At least gale force wind gusts and heavy precipitation will accompany the storm before it moves off to the northeast. Gusty northwest winds will follow the system as high pressure moves in for the weekend. &&


7 Day Forecast for Marine Location Near Kittery, ME
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location: 43.08, -70.75     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 081053 AAA AFDGYX

Area Forecast Discussion . UPDATED National Weather Service Gray ME 653 AM EDT Wed Apr 8 2020

SYNOPSIS. High pressure builds into the region on Wednesday before the weather turns significantly more active on Thursday as low pressure develops over the Gulf of Maine with rain and mountain snow expected. High pressure returns on Friday into Saturday with temperatures a bit below normal for this time of year.

NEAR TERM /UNTIL 6 PM THIS EVENING/. Update . Minor changes to reflect latest observational trends.

Previous discussion . The warm front never quite made it into the forecast area . with convection remaining well to our S. Some WAA over the top of it however has brought a few very light showers to parts of Srn NH this early morning. These will move SE thru the remainder of the morning . leaving us with a dry and seasonable day. The proverbial calm before the storm.

SHORT TERM /6 PM THIS EVENING THROUGH THURSDAY NIGHT/. ***SIGNIFICANT LATE SEASON SNOWFALL POSSIBLE THURSDAY***

Rapid cyclogensis is forecast to take place over New England . as a jet streak in excess of 150 knots moves off the Mid Atlantic coast. The left exit region will reside overhead and within the diffluent region of the upper trof. Lift will be maximized . with mid level low centers quickly consolidating in the vicinity of the Wrn ME coastline.

This set up is primed for heavy precip over the local forecast area. It will move quickly into the area over the first part of Thu . as more of a WAA forced band. This will transition to a deformation band of precip as mid level lows become stacked by late afternoon. Beneath the heaviest precip evaporational and melt cooling will help to drive surface temps down towards freezing. There remains a great deal of uncertainty as to just how close to the coast that process will occur . depending on track of the low. Given the rates of precip this makes the forecast a tough call . because even an hour or two of near freezing temps could be several inches of snow. Forecast models do show 925 and 950 mb temps falling back towards 0C over a large chunk of Wrn ME. This suggests that much of that area could see some snowfall. The best combination of forcing . temps . and QPF will be over the Wrn ME mtns and foothills . possibly even spilling into parts of Kennebec County. Guidance is showing an excellent signal for banded precip on the NW side of the developing low. Significant snowfall is possible in the mtns . and 6 inches or more thru the foothills. Another complicating factor will be late season injection of higher theta-e air . and dry slot racing Nwd. This will be a system will plenty of convection . and that includes most of the local area whether it is snowing or not. Convectively enhanced snowfall rates add additional uncertainty to snowfall forecast.

I have decided to expand the watch into Nrn Coos County at this time . as enough snowfall occurs at valley location to justify a 50 percent risk of 6 inches or more.

LONG TERM /FRIDAY THROUGH TUESDAY/. Overview: Rain and snow showers linger and gusty northwest winds develop on Friday as low pressure moves off to the northeast. Northwest flow dominates over the first half of the weekend and high pressure briefly nudges into the region on Sunday. The beginning of next week currently looks wet and unsettled as a large low pressure system develops over the Midwest and slowly moves northeast.

Impacts: Winds gusting to 30-40 mph Friday afternoon in parts of central and southern NH.

Forecast Details: Light rain or snow showers continue on Friday as a low pressure system quickly moves away to the northeast. Northwest winds will pick up as the morning progresses, and that direction is ideal for downsloping which could enhance the winds. Have gusts to 30-40 mph for much of east central and southern NH Friday afternoon and evening and it is possible that gusts above 40 mph will occur. A wind advisory may be needed for those areas, but will let that decision be made by future shifts. The northwest winds continue through Saturday but should be weaker and much less gusty; Saturday otherwise looks dry though clouds will linger most of the day. High temperatures on Friday and Saturday will range from the mid 30s to the upper 40s.

High pressure nudges into New England early Saturday night and warm southerly flow begins to develop over our region. Sunday looks dry for our region at the moment with warmer temperatures than previous days, but developing low pressure over the Midwest looks to bring another round of precipitation to our region for the early part of next week. This system will slowly move north through the rest of the long term period with secondary lows developing and move northeast toward New England simultaneously. The global deterministic models are not in great agreement, but the general consensus amongst their latest runs is for rain on Monday that begins to diminish on Tuesday.

AVIATION /12Z WEDNESDAY THROUGH SUNDAY/. Short Term . Small area of IFR CIGs has developed on the Midcoast is weak onshore flow N of the warm front. This will dissipate this morning with VFR conditions expected into Thu. Strong coastal storm will develop quickly Thu . with heavy precip . LLWS . and widespread IFR conditions. Precip will move in from the SW first half of Thu and quickly overspread to the NE. Best chance for some SN will be HIE and AUG with several hours of LIFR possible. LLWS will be most likely near the coast in the afternoon just ahead of the low center. Conditions will be slow to improve Thu night.

Long Term . Gusty northwest winds and lingering rain/snow showers on Friday. Winds remain out of the northwest on Saturday but will be weaker and less gusty. VFR conditions expected Saturday and Sunday with a return to MVFR/IFR conditions early next week in rain.

MARINE. Short Term . Quiet over the waters today . but conditions will be deteriorating quickly into Thu. Gale watch remains in effect for rapidly developing coastal storm. At this time gale force wind gusts look fairly likely . but depending on exact low location there is a low chance of some storm force gusts over parts of the waters. This would be most likely N of Port Clyde.

Long Term . Seas will begin to diminish on Friday as the coastal storm pulls away to the northeast though winds will be gusty out of the northwest. A gale watch is up through Friday afternoon and SCA conditions will likely continue through Friday night. Seas pick up again early next week as southerly flow develops over the waters.

HYDROLOGY. A period of heavy rain is likely along the Maine coast Thursday evening . transitioning to snow over the interior. Given snow in the mountains and a mix into the foothills . do not expect significant river flood issues. May have some short-fused issues along the coast especially with water levels rising towards the ~1AM Friday high tide which may prevent efficient surface water drainage along the coast.

TIDES/COASTAL FLOODING. An extended coastal flood advisory is in effect for high tides continuing through early Friday. Astronomical tides are near minor flood levels without wind impacts already . and with surge levels expected to increase ahead of Thursday's storm . minor impacts are likely. There is some potential that the Thursday night high tide could see moderate /warning level/ impacts depending on exact timing/location of storm development and how long winds remain onshore. Forecast surge values remain around 2 ft at maximum . and this lines up well with the current products.

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 . Coastal Flood Advisory until 3 AM EDT Friday for MEZ023>028. Winter Storm Watch from Thursday morning through Friday afternoon for MEZ007>009-012>014. NH . Coastal Flood Advisory until 3 AM EDT Friday for NHZ014. Winter Storm Watch from Thursday morning through Friday afternoon for NHZ001. MARINE . Gale Watch from Thursday afternoon through Friday afternoon for ANZ150>154.



SYNOPSIS . Legro/Watson NEAR TERM . Legro SHORT TERM . Legro LONG TERM . Watson AVIATION . Legro/Watson MARINE . Legro/Watson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
IOSN3 - Isle of Shoals, NH 10 mi42 min NE 13 G 14 41°F 1001 hPa (-0.4)41°F
44073 12 mi98 min NNE 5.8 G 7.8 44°F 43°F
44030 - Buoy B0102 - Western Maine Shelf 18 mi98 min NNE 9.7 G 14 3 ft1003 hPa
WELM1 - 8419317 - Wells, ME 19 mi54 min N 5.1 G 6 37°F 44°F1002 hPa
WEXM1 - Wells Reserve, ME 21 mi102 min N 6 37°F 34°F
44098 - Jeffrey's Ledge, NH (160) 36 mi94 min 42°F2 ft
44029 - Buoy A0102 - Mass. Bay/Stellwagen 40 mi98 min NE 7.8 G 9.7 44°F 41°F2 ft999.4 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 45 mi52 min NNE 16 G 19 38°F 42°F2 ft1001.4 hPa (-0.9)37°F
CASM1 - 8418150 - Portland, ME 48 mi54 min 36°F 43°F

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH4 mi46 minNNE 410.00 miOvercast41°F35°F81%1001.6 hPa
Rochester - Skyhaven Airport, NH16 mi51 minN 010.00 miOvercast39°F28°F67%1001.4 hPa
Sanford, Sanford Regional Airport, ME22 mi46 minN 310.00 miOvercast37°F33°F86%1002.3 hPa

Link to 5 minute data for KPSM

Wind History from PSM (wind in knots)
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W12NW8SE6SE5SE4CalmCalmNW3CalmCalmN4N4CalmCalmNE4
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2 days agoSE5SE6S8S6SE3SE10SE12SE10SE13SE9SE8S7SE5CalmCalmCalmW4W6CalmW4W5W5W7W6

Tide / Current Tables for Portsmouth, Portsmouth Harbor, New Hampshire
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Portsmouth
Click for Map
Wed -- 06:01 AM EDT     -1.44 feet Low Tide
Wed -- 06:12 AM EDT     Sunrise
Wed -- 06:50 AM EDT     Moonset
Wed -- 12:21 PM EDT     9.66 feet High Tide
Wed -- 06:24 PM EDT     -1.24 feet Low Tide
Wed -- 07:18 PM EDT     Sunset
Wed -- 08:11 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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9.68.96.94.11.3-0.7-1.4-0.813.66.48.59.69.47.95.42.50.1-1.1-10.42.85.78.1

Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
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Portsmouth Harbor Entrance
Click for Map
Wed -- 01:22 AM EDT     -0.00 knots Slack
Wed -- 04:13 AM EDT     -2.44 knots Max Ebb
Wed -- 06:11 AM EDT     Sunrise
Wed -- 06:50 AM EDT     Moonset
Wed -- 07:55 AM EDT     0.00 knots Slack
Wed -- 10:07 AM EDT     1.73 knots Max Flood
Wed -- 01:42 PM EDT     -0.00 knots Slack
Wed -- 04:35 PM EDT     -2.49 knots Max Ebb
Wed -- 07:17 PM EDT     Sunset
Wed -- 08:11 PM EDT     Moonrise
Wed -- 08:15 PM EDT     0.00 knots Slack
Wed -- 10:32 PM EDT     1.88 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.4-0.7-1.9-2.4-2.3-1.8-1.10.11.21.71.51.10.6-0.3-1.5-2.4-2.4-2-1.4-0.30.91.81.8

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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Wind Forecast for Gray/Portland, ME (7,2,3,4)
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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.