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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 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 5:48AM | Sunset 7:42PM | Sunday August 18, 2019 2:32 AM EDT (06:32 UTC) | Moonrise 9:30PM | Moonset 8:36AM | Illumination 93% |  |
ANZ154 Coastal Waters From Cape Elizabeth, Me To Merrimack River, Ma Out 25 Nm- 1233 Am Edt Sun Aug 18 2019
Rest of tonight..SE winds around 5 kt. Seas around 2 ft. A chance of showers. Areas of fog.
Sun..SE winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas around 2 ft. Areas of fog in the morning, then patchy fog in the afternoon with vsby 1 to 3 nm.
Sun night..SE winds 5 to 10 kt, becoming sw after midnight. Seas 2 to 3 ft. A chance of showers. Areas of fog. Vsby 1 to 3 nm.
Mon..S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Areas of fog in the morning with vsby 1 to 3 nm.
Mon night..SW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers in the evening.
Tue..N winds 5 to 10 kt, becoming se in the afternoon. Seas 2 to 3 ft.
Tue night..S winds around 5 kt. Seas around 2 ft. A chance of showers.
Wed..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Wed night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers and tstms.
Thu..SW winds around 10 kt with gusts up to 20 kt. Seas around 3 ft. A chance of showers.
Thu night..W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms.
Rest of tonight..SE winds around 5 kt. Seas around 2 ft. A chance of showers. Areas of fog.
Sun..SE winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas around 2 ft. Areas of fog in the morning, then patchy fog in the afternoon with vsby 1 to 3 nm.
Sun night..SE winds 5 to 10 kt, becoming sw after midnight. Seas 2 to 3 ft. A chance of showers. Areas of fog. Vsby 1 to 3 nm.
Mon..S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Areas of fog in the morning with vsby 1 to 3 nm.
Mon night..SW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers in the evening.
Tue..N winds 5 to 10 kt, becoming se in the afternoon. Seas 2 to 3 ft.
Tue night..S winds around 5 kt. Seas around 2 ft. A chance of showers.
Wed..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Wed night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers and tstms.
Thu..SW winds around 10 kt with gusts up to 20 kt. Seas around 3 ft. A chance of showers.
Thu night..W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms.
ANZ100 1233 Am Edt Sun Aug 18 2019
Synopsis for stonington me to merrimack river ma out to 25 nm.. A warm front will approach from the west tonight and Sunday and will lift north of the region Sunday night. Hot and humid weather will return on Monday and Monday night as a weak frontal boundary settles south through the region. Stalled frontal boundary will be the focus for showers and Thunderstorms Tuesday and Tuesday night as it lifts back to the north. A stronger cold front will approach from the west on Wednesday and will slowly cross the region Wednesday night and Thursday. High pressure will build in from the west for the end of the week. &&
Synopsis for stonington me to merrimack river ma out to 25 nm.. A warm front will approach from the west tonight and Sunday and will lift north of the region Sunday night. Hot and humid weather will return on Monday and Monday night as a weak frontal boundary settles south through the region. Stalled frontal boundary will be the focus for showers and Thunderstorms Tuesday and Tuesday night as it lifts back to the north. A stronger cold front will approach from the west on Wednesday and will slowly cross the region Wednesday night and Thursday. High pressure will build in from the west for the end of the week. &&
7 Day Forecast for Marine Location Near Kennebunk, ME
Hourly EDIT Helplocation: 43.32, -70.56 debug
Area Discussion for - Gray/Portland, ME
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kgyx 180429 afdgyx area forecast discussion national weather service gray me 1229 am edt Sun aug 18 2019 Synopsis Showers and thunderstorms, some strong are expected this evening and again Sunday afternoon, particularly across new hampshire. Otherwise, very warm and humid conditions arrive Monday and last into Wednesday. A cold front moves through Wednesday night allowing for cooler and drier air to move in Thursday through the rest of the week. Near term until 6 am this morning 1225 am... Quick update timing the line of weakening east and out of the CWA by 06z or so. I think once the line exits it should be dry for the rest of a night, with the fog thickening up a bit toward daybreak. 1015 pm update... just a quick update to cancel the flash flood watch. Still some showers over coos county but the threat for flash flooding is quickly diminishing as showers move east. 905 pm update... broken line of showers and storms continues to move east through nh this evening and is slowly weakening as it does so as evident by decreasing total lightning and warming cloud tops. As the severe threat begins to quickly wane we are more concerned with the flooding potential. So far the cells have been moving along enough to prevent heavy rain from falling in one place for too long and causing flooding to occur. Still keeping an eye out for this possibility as the activity begins to lose some forward steam and becomes more stratiform in nature. Besides adjusting pops and removing thunder overnight, have added drizzle for the coastal plain where low level moisture is pooling. 620 pm update... convection is not moving into new hampshire this evening with cells developing ahead of the main line moving through ny and vt. The main line has plenty of line and individual cells have posed wind and hail threats at times. As the line continues to move east and coalesces the damaging wind threat will increase. Time of arrival tool has the cells ahead of the line arriving within the next hour while the main line will arrive closer to 8 pm. Lapse rates and instability are less farther east and as darkness ensues we will see convection struggle more as it enters our cwa. Still will be concerned with extensive lightning and heavy rain over campgrounds and the higher terrain, as well as strong wind gusts. Flash flood watch remains in place through tonight. Made a few minor changes to the forecast, but at this time we are just waiting for the precipitation to arrive. Previous discussion... for this afternoon and evening we'll have the tale of two cwas. To the east the low stratus and marine layer which has held fast all day will remain through the overnight. Expect patchy fog onshore and denser fog over the immediate coastline as the onshore flow continues to push the surface moisture up against the foothills. Across western new hampshire an very different weather regime will reign. Here mid level morning cloud coverage has decreased allowing for broken sunshine and the start of some diurnal instability. To our west a convective line associated with an upper level short wave is moving across upstate new york. This line will cross the ct river around sunset. With the increased sunshine in the region comes increasing instability with cape values expected to exceed 2000 j kg as the line moves into the region. The potential exists for a damaging wind threat into far western nh if the convective line is able to maintain strength through the mountains of vt, however the decreasing shear and instability after sunset will keep the threat confined to just an hour or so as it crosses the ct river. The greater threat this evening will be for flash flooding. Mesoscale models have continued to indicate the potential for multiple storms to pass over the western nh mountains. With the cloud layer motion aligned along the convective line, expect |
multiple rounds of precipitation to be able to train over the same locations, dropping up to 3-4" of rain. This would easily exceed flash flood guidance. Further looking upstream we see radar estimated rainfall rates of 2-3" hour with 1+" hr amounts in the same airmass ahead of the line. With the mountains being most susceptible to flash flooding, and likely filled with hikers and campers feel the flash flood watch is appropriate and it will remain in place for grafton and coos counties. As radar trends further develop over the next several hours, expansion southwards into sullivan and cheshire counties is possible. Eastward expansion is unlikely as the marine airmass in place will rapidly cut off any storms resulting in decaying elevated convection east of the mountains after midnight. Short term 6 am this morning through 6 am Monday After midnight expect the remains of the convection to decay and progress eastwards through the area with a chance for scattered showers. Low stratus and fog will remain entrenched. Further west as the convection clears the low level moisture left by the rainfall will likely result in a brief period of dense fog near sunrise in the ct and possibly merrimack river valleys. By sunrise Sunday, we prepare to repeat the same pattern all over again. Expect the marine layer to hold on through at least the middle of the morning on the coastal plain. To the west another upper level short wave will dive south out of ontario into western new york with widespread convective initiation in the early afternoon. With slightly earlier timing the severe threat for Sunday will be greater than this afternoon. Damaging winds will be possible across new hampshire with the extent of the threat largely determined by how much sunshine is able to push through in the morning. With strong turning of the low level winds as the easterly marine flow backs rapidly to southwest into the cloud free sector expect some stronger updrafts which will help to enhance storms. With no change in airmass significant rain rates and flash flooding will again be a concern tomorrow, especially in any areas which receive a lot of rain this evening. The storm motion doesn't look to align with the upper level forcing quite as well as this evening, however a strong low level jet and higher pwats makes flash flooding a threat again tomorrow. Long term Monday through Saturday Little change from the previous forecast. Warm and humid conditions expected Monday and Tuesday, and likely into Wednesday. Showers and storms could form at any time with subtle low-amplitude short wave troughs moving through the mean westerly flow. A substantial air mass change is expected will come around Thursday when a strong cold front moves through the region. Aviation 06z Sunday through Thursday Short term... For sites along the coast, the conditions can be summed up in two words: marine layer. Expect low ceilings and fog to persist through the overnight and into tomorrow with widespread lifr conditions. To the west, sunshine has broken through a MVFR ceilings. Expect a line of convection to bring heavy rain and thunderstorms to the ct river valley around nightfall. Leb and hie should see lightning, while elsewhere expect showers. Marine layer will keep the coast in ifr through midday tomorrow when another round of convection will impact all areas. Long term... GenerallyVFR with areas of MVFR ceilings vsby in showers and thunderstorms. Nighttime fog possible Monday night through Wednesday night. Marine Short term... Fog and low stratus will remain over the gulf of maine through the end of the weekend. Light easterly flow will continue with winds and seas remaining below sca. Long term... Scas may be needed on Wednesday but otherwise, marine fog may be locally dense this weekend into early next week. Gyx watches warnings advisories Me... None. Nh... None. Marine... None. Synopsis... near term... Cempa hanes short term... Curtis long term... Ekster aviation... Curtis ekster marine... Curtis ekster |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| WELM1 - 8419317 - Wells, ME | 0 mi | 44 min | Calm G 2.9 | 67°F | 63°F | 1016.1 hPa | ||
| WEXM1 - Wells Reserve, ME | 1 mi | 92 min | SSE 1.9 | 67°F | 67°F | |||
| 44030 - Buoy B0102 - Western Maine Shelf | 12 mi | 88 min | SE 5.8 G 5.8 | 66°F | 66°F | 3 ft | 1015.4 hPa | |
| 44073 | 21 mi | 88 min | SSE 7.8 G 12 | 66°F | ||||
| BGXN3 - Great Bay Reserve, NH | 23 mi | 107 min | Calm | 67°F | 1016 hPa | 67°F | ||
| IOSN3 - Isle of Shoals, NH | 25 mi | 32 min | SW 8 G 8 | 66°F | 1015.6 hPa (-0.4) | 66°F | ||
| 44007 - PORTLAND 12 NM Southeast of Portland,ME | 26 mi | 42 min | S 7.8 G 9.7 | 67°F | 65°F | 3 ft | 1015.1 hPa (-1.3) | 67°F |
| CASM1 - 8418150 - Portland, ME | 29 mi | 50 min | 65°F | 60°F | ||||
| 44098 - Jeffrey's Ledge, NH (160) | 42 mi | 24 min | 68°F | 3 ft |
Wind History for Wells, ME
(wind in knots) EDIT (on/off) Help| 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | |
| Last 24hr | S | S | S | S | S | S | S | S | S | SW | S | S G8 | S | E | SE | SE G4 | SE | SE | E | SE | E | SE | S | -- |
| 1 day ago | NE | NE | N | E | E | E | SE | E | E | SE | SE | SE | S G10 | S | S | S G10 | S G10 | S | SE | S | SE | SE | SE | S |
| 2 days ago | N | N | NW | N G7 | E | SE | SE G9 | SE | S | S | SE | S | SE | S | S | S | SW | NE | SW | SW | SW | N |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Sanford, Sanford Regional Airport, ME | 9 mi | 96 min | N 0 | 10.00 mi | Light Rain | 67°F | 66°F | 97% | 1016.3 hPa |
| Rochester - Skyhaven Airport, NH | 19 mi | 1.7 hrs | SSE 3 | 10.00 mi | Overcast | 67°F | 64°F | 93% | 1015.5 hPa |
| Pease Air Force Base / Portsmouth, NH | 21 mi | 96 min | SE 5 | 7.00 mi | Overcast | 67°F | 67°F | 99% | 1015.8 hPa |
Link to 5 minute data for KSFM
Wind History from SFM (wind in knots)
| 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | |
| Last 24hr | Calm | Calm | SE | E | SE | SE | SE | S | SE | SE | SE | SE | SE | SE | SE | SE | Calm | S | Calm | Calm | ||||
| 1 day ago | Calm | Calm | Calm | Calm | E | Calm | SE | Calm | SE | SE | SE | SE | SE | SE | SE | Calm | Calm | Calm | Calm | SE | ||||
| 2 days ago | Calm | Calm | Calm | Calm | Calm | NE | E | NE | Calm | E | E | SE | SE | Calm | Calm | Calm | Calm | Calm | Calm | Calm |
Tide / Current Tables for Wells, Webhannet River, Maine
EDIT Weekend mode (on/off) (on/off) Help One Week of DataTide / Current data from XTide NOT FOR NAVIGATION
Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
EDIT (on/off) Help One Week of DataPortsmouth Harbor Entrance
Click for Map
Sun -- 03:05 AM EDT -0.00 knots Slack
Sun -- 05:51 AM EDT Sunrise
Sun -- 05:57 AM EDT -1.91 knots Max Ebb
Sun -- 08:37 AM EDT Moonset
Sun -- 09:56 AM EDT 0.00 knots Slack
Sun -- 11:49 AM EDT 1.12 knots Max Flood
Sun -- 03:38 PM EDT -0.00 knots Slack
Sun -- 06:17 PM EDT -1.67 knots Max Ebb
Sun -- 07:40 PM EDT Sunset
Sun -- 09:29 PM EDT Moonrise
Sun -- 10:08 PM EDT 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 03:05 AM EDT -0.00 knots Slack
Sun -- 05:51 AM EDT Sunrise
Sun -- 05:57 AM EDT -1.91 knots Max Ebb
Sun -- 08:37 AM EDT Moonset
Sun -- 09:56 AM EDT 0.00 knots Slack
Sun -- 11:49 AM EDT 1.12 knots Max Flood
Sun -- 03:38 PM EDT -0.00 knots Slack
Sun -- 06:17 PM EDT -1.67 knots Max Ebb
Sun -- 07:40 PM EDT Sunset
Sun -- 09:29 PM EDT Moonrise
Sun -- 10:08 PM EDT 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 1 | 0.7 | 0.5 | 0.1 | -0.8 | -1.6 | -1.9 | -1.7 | -1.4 | -0.8 | 0.1 | 0.9 | 1.1 | 0.9 | 0.6 | 0.4 | -0.3 | -1.1 | -1.6 | -1.6 | -1.2 | -0.8 | -0.1 | 0.7 |
Weather Map and Satellite Images
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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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Gray/Portland, ME (2,6,7,8)
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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. |