Thursday, December5, 2019
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Marine Weather and Tides
Hampton Beach, NH

Version 3.4
NOTICE
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.
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 6:56AMSunset 4:11PM Thursday December 5, 2019 2:22 PM EST (19:22 UTC) Moonrise 2:11PMMoonset 1:00AM Illumination 64% Phase: Waxing Gibbous; Moon at 9 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- 936 Am Est Thu Dec 5 2019
.small craft advisory in effect from 6 pm est this evening through Friday morning...
This afternoon..W winds 10 to 20 kt. Gusts up to 25 kt late. Seas 2 to 4 ft.
Tonight..W winds 15 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Fri..W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 4 ft. A chance of snow and rain showers in the afternoon with vsby 1 to 3 nm.
Fri night..NW winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of snow showers in the evening with vsby 1 to 3 nm.
Sat..NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft in the morning, then 1 foot or less.
Sat night..NW winds 5 to 15 kt with gusts up to 25 kt, becoming 5 to 10 kt after midnight. Seas 1 foot or less.
Sun..SW winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Sun night..SW winds 15 to 25 kt with gusts up to 35 kt. Seas 4 to 6 ft.
Mon..SW winds 15 to 25 kt with gusts up to 30 kt. Seas 4 to 7 ft. A chance of rain.
Mon night..SW winds 10 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Rain.
ANZ100 936 Am Est Thu Dec 5 2019
Synopsis for stonington me to merrimack river ma out to 25 nm.. Northwesterly flow will increase this afternoon as cold air moves into the region tonight. A weak area of low pressure will move south of the waters late Friday and Friday night. High pressure builds over the waters over the weekend with low pressure approaching from the west early next week. &&


7 Day Forecast for Marine Location Near Hampton Beach, NH
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location: 42.89, -70.77     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 051725 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 1225 PM EST Thu Dec 5 2019

SYNOPSIS. An upper level disturbance will move across northern New England through today allowing for a good amount of cloudiness and some snow showers in the mountains. Another low pressure system will pass near or south of the region on Friday with an additional chance for light snow in southern areas. This system will usher in significantly colder weather for Saturday. Warmer temperatures perhaps with some rain will be possible early next week.

NEAR TERM /UNTIL 6 PM THIS EVENING/. 1220 PM Update, forecast remains on track. Did increase gusts this afternoon based on tightening gradient and arrival of cold air advection. Otherwise, temperatures have risen into the 40s across many southeastern locations, and that looks good relative to the going forecast. Can't rule out a couple of snow showers or isold squall with passage of short wave trough this afternoon, even downwind of the mountains and across southern portions of the forecast area.

Previously .

Weak synoptic scale forcing for ascent working in tandem with relatively moist low level westerly upslope flow in the lowest 850mb continues to allow for accumulating snow showers in the mountains. Occasionally these may spill over into the foothills, but the flow continues to be largely blocked. Otherwise, downwind of the mountains and across southern NH a good amount of sunshine has at least temporarily broken out so have adjusted the sky forecast accordingly. Otherwise, just a few minor adjustments to temperatures at this hour.

Previously .

7am update . expect freezing fog to dissipate in the next hour or two.

Prev Disc . Pockets of freezing fog this morning in some of the valleys. Hires guidance continues to suggest the coverage will be fairly limited and more focused on Mass so will stick with just a mention of freezing fog in the forecast.

This afternoon cold advection takes hold. As northwesterly cold advection continues through the day snow showers will start off in the mountains in the morning. Both snow squall parameter and Froude number would indicate the potential for showers to move out of the mountains and towards the coast. Because of this have increased the PoP slightly through the area this afternoon although with limited moisture any shower coverage would be limited.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/. Tonight will see just the mountain clouds hang on as colder air moves into the region. Expect light northwesterly flow to keep up overnight keeping temperatures in the teens across the region and so have trended with the warmer end of the guidance through the north.

Friday another short wave moves out of the Great Lakes and passes through southern New England. This will lead to light snow over the area. Have limited pops to along the southern border of the CWA as the system is quite small and QPF is limited. Even so a few tenths of an inch of snow is possible in this area. Could see over an inch in spots as the colder air mass will help to increase snow ratios and up the 'fluff factor'.

LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/. Any remaining snow showers will exit into the Gulf of Maine Friday evening as a clipper system exits quickly to the east.

Strong cold air advection will follow this departing area of low pressure with H8 temperatures bottoming out into the minus 14C to minus 16C range during the day Saturday. This will keep maximum temperatures only in the teens across the northern mountains to the 20s in the south. As winds become light Saturday night, radiational cooling can be expected under clear skies and a fresh coating of snow in some areas. This will allow for well below normal temperatures which will fall into the single numbers in most areas.

High pressure will depart the Eastern Seaboard and move south of east into the central Atlantic, strengthening as it does so on Monday and Tuesday. A shortwave diving southeast through the High Plains over the weekend will lead to the development of low pressure across the Central Great Lakes during the day on Monday. This system will be strengthening as it rides east- northeastward through the Great Lakes and up the Saint Lawrence Valley through late Tuesday. Moisture riding north on the western side of the high pressure center, and the strengthening low pressure center will bring a round of precipitation to the area on Monday and Tuesday.

At this point in time it appears that spotty precipitation could move into southern areas before dawn on Monday, but the bulk of the precipitation would arrive late morning and into the afternoon hours on Monday. The interaction between the high and low pressure centers will lead to freshening southwesterly flow aloft Sunday night through early Tuesday, but southerly flow at the surface will likely be slow to develop until during the day on Monday. Because of this, some light freezing rain is possible near the onset, and from any spotty precipitation Sunday Night, especially across interior sections. The cold shouldn't hold on too long into the day Monday however, with the synoptic set up not being favorable for cold air damming. Increasing south-southwesterly flow should scour out any below freezing temperatures on Monday. It's possible that this will not be the case in the far northern mountain valleys, with colder temperatures holding on into Monday night. Rain will fall across most areas into Tuesday morning, with a cold front passing through the region late Tuesday and into the overnight. The front will usher in a cold airmass Wednesday and Thursday with an Arctic High Pressure center building in behind the front.

AVIATION /18Z THURSDAY THROUGH TUESDAY/. Short Term . Snow showers will continue in the mountains today with MVFR and NWly flow as cold air advection continues. A few showers may make it out to AUG but would be brief. Overnight a return to mid level clouds in the north with VFR across the region. Friday another weak low passes through the southern portion of the area with MVFR again possible.

Long Term . Improving conditions Friday night to VFR with the exception for MVFR conditions in scattered snow showers at HIE. VFR conditions expected through the weekend.

MARINE. Short Term . Cold air advection will take hold this afternoon with increasing northwesterly flow across the Gulf of Maine leading to Small craft conditions. SCA will remain in place. Another low will move through Friday afternoon with scattered snow showers possible along the southern portion of the coastal waters.

Long Term . Gusty northwesterly winds with SCA conditions Friday night. A persistent south to southwesterly flow will develop early next week with building waves.

GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . None. MARINE . Small Craft Advisory from 6 PM this evening to 8 AM EST Friday for ANZ150-152-154.



NEAR TERM . Ekster SHORT TERM . Curtis LONG TERM . Clair


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
IOSN3 - Isle of Shoals, NH 9 mi82 min WNW 20 G 22 41°F 1000.6 hPa (-0.0)30°F
BGXN3 - Great Bay Reserve, NH 12 mi97 min WNW 6 40°F 1001 hPa29°F
44030 - Buoy B0102 - Western Maine Shelf 27 mi78 min W 14 G 19 42°F 47°F2 ft1000.3 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 28 mi78 min NW 19 G 23 42°F 47°F2 ft999.9 hPa
WELM1 - 8419317 - Wells, ME 32 mi52 min NW 8.9 G 19 42°F 40°F1001.1 hPa
44098 - Jeffrey's Ledge, NH (160) 33 mi44 min 48°F4 ft
WEXM1 - Wells Reserve, ME 33 mi82 min W 6 42°F 29°F
44013 - BOSTON 16 NM East of Boston, MA 38 mi32 min WNW 19 G 23 44°F 48°F3 ft1001.8 hPa (+0.8)31°F
BHBM3 - 8443970 - Boston, MA 40 mi52 min 45°F 42°F1001.7 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH14 mi86 minWNW 9 G 1910.00 miMostly Cloudy41°F25°F54%1001.3 hPa
Lawrence Municipal Airport, MA22 mi28 minW 1110.00 miOvercast41°F26°F55%1003.4 hPa
Beverly, Beverly Municipal Airport, MA23 mi29 minWNW 11 G 1910.00 miOvercast42°F26°F53%1002.3 hPa

Link to 5 minute data for KPSM

Wind History from PSM (wind in knots)
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Last 24hrSW4S4SW3S4CalmSW3W4W3SW5W5W3W4W5W5W3CalmSW5W4W4CalmW10W10W9
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Tide / Current Tables for Hampton Harbor, New Hampshire
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Hampton Harbor
Click for Map
Thu -- 12:01 AM EST     Moonset
Thu -- 05:59 AM EST     7.52 feet High Tide
Thu -- 06:58 AM EST     Sunrise
Thu -- 12:22 PM EST     1.62 feet Low Tide
Thu -- 01:10 PM EST     Moonrise
Thu -- 04:09 PM EST     Sunset
Thu -- 06:12 PM EST     7.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.52.84.56.17.27.57.26.24.73.32.21.71.82.74.25.877.57.36.55.13.52.2

Tide / Current Tables for Newburyport (Merrimack River), Massachusetts Current
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Newburyport (Merrimack River)
Click for Map
Thu -- 12:01 AM EST     Moonset
Thu -- 12:46 AM EST     0.00 knots Slack
Thu -- 04:27 AM EST     1.45 knots Max Flood
Thu -- 06:54 AM EST     -0.00 knots Slack
Thu -- 06:58 AM EST     Sunrise
Thu -- 11:18 AM EST     -0.94 knots Max Ebb
Thu -- 01:11 PM EST     Moonrise
Thu -- 01:14 PM EST     0.00 knots Slack
Thu -- 04:09 PM EST     Sunset
Thu -- 04:52 PM EST     1.37 knots Max Flood
Thu -- 07:12 PM EST     -0.00 knots Slack
Thu -- 11:39 PM EST     -0.97 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.60.20.60.91.41.30.7-0.1-0.5-0.8-0.8-0.9-0.8-0.20.40.71.11.40.90.1-0.5-0.8-0.9-0.9

Weather Map
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wmap_A
GEOS Local Image of    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 (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 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.