Friday, December6, 2019
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Marine Weather and Tides
Hampton, 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 6:58AMSunset 4:09PM Friday December 6, 2019 3:50 PM EST (20:50 UTC) Moonrise 2:33PMMoonset 2:00AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 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- 336 Pm Est Fri Dec 6 2019
.small craft advisory in effect from midnight est tonight through Saturday afternoon...
Tonight..NW winds 10 to 20 kt with gusts up to 25 kt. Seas 1 to 2 ft, building to 2 to 4 ft after midnight. Snow and rain this evening, then a chance of snow after midnight. Vsby 1 to 3 nm.
Sat..NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Sat night..NW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
Sun..W winds 5 to 10 kt, becoming sw 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 1 foot or less, then 2 to 4 ft in the afternoon.
Sun night..SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. A chance of rain after midnight.
Mon..S winds 15 to 25 kt. Gusts up to 35 kt in the afternoon. Seas 3 to 5 ft, building to 4 to 7 ft in the afternoon. A chance of rain in the morning, then rain in the afternoon. Vsby 1 to 3 nm.
Mon night..S winds 20 to 30 kt with gusts up to 40 kt. Seas 7 to 10 ft. Rain. Vsby 1 to 3 nm.
Tue..SW winds 15 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. Showers likely.
Tue night..W winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. Rain likely.
Wed..W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of rain and snow showers. Vsby 1 to 3 nm.
Wed night..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. A chance of snow showers. Vsby 1 to 3 nm.
ANZ100 336 Pm Est Fri Dec 6 2019
Synopsis for stonington me to merrimack river ma out to 25 nm.. A weak low pressure will pass south of the waters tonight. High pressure builds over the waters through the weekend. A stronger low pressure approaches from the southwest early next week with gusty winds and low visibility in rain and fog possible. &&


7 Day Forecast for Marine Location Near Hampton, NH
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location: 42.97, -70.73     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 061618 AAB AFDGYX

Area Forecast Discussion . UPDATED National Weather Service Gray ME 1118 AM EST Fri Dec 6 2019

SYNOPSIS. A weak area of low pressure will cross the region this afternoon. Much colder air will sweep across the forecast area tonight and Saturday. Warmer temperatures and some rain are expected early next week before a cold front brings in another dose of Arctic cold during the second half of the next work week.

NEAR TERM /UNTIL 6 PM THIS EVENING/. 1115 AM Update . Dry air is still eroding the leading edge of the precipitation shield, which is making its way across southern NH and into SW Maine. We should start seeing snow reach the ground shortly in southern and central NH, but it may take a little bit longer in ME. Still expecting minor accumulations as most guidance deepens the low only once its offshore. So we could see some accumulations over the islands and Downeast along the Maine coast.


930 AM Update . GOES satellite and radar imagery are showing snow moving across NY State and into Vermont this morning. Have only changed weather and QPF/snow amounts lightly as near term CAM models are still indicating 1-3" across southern NH through tonight, with less coverage north and east. Short of an advisory, we will likely issue an SPS for slick commutes this afternoon. Still we have a little way to go with top-down saturation with dew points only in the lower teens in NH and ME.


Update . Have updated the forecast based on current observations and latest radar imagery. Have upped snowfall amounts slightly over southern portions of the forecast area. Latest mesoscale model trends have increased the QPF for southern New Hampshire and extreme southwest Maine overnight. Otherwise, just minor changes to the latest forecast package.

Prev Disc . Scattered upslope snow showers will gradually end over the mountains this morning.

A clipper type system will then cross the region this afternoon. Have leaned closely towards the higher pops of the latest HRRR as snow will likely develop over southern New Hampshire during the late morning hours before pushing east. With the track of this system, expect an inch or two snow accumulation across southern New Hampshire and into portions of York County in Maine. Some of the higher elevations over southern New Hampshire may pick up a little more in the way of precipitation. Further to the north, there may be a only a coating of snow.

Winds will become light this afternoon in advance of this weak system with highs in the 20s to lower 30s in most areas.

SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY/. Light snow continues for a short period along and near the coastline as the low slowly intensifies as it exits into and through the Gulf of Maine.

Much colder air will follow this system on northwesterly breezes tonight with upslope snow showers continuing in the mountains. By Saturday, the core of the cold air will be over the region. There will be good mixing with temperatures in the -14C to -18C range, yielding highs only in the teens and 20s across the region.

Saturday night will likely be the coldest night over the next few days as high pressure crests over the region. There is the potential for good radiational cooling in some areas with a fresh snowfall and clear skies. Question will be the gradient and whether or not winds can go calm during the night as a ridge of high pressure remains to our west during much of the night. Nevertheless, expect readings in the single numbers in many areas.

Sunday will remain fair and dry as high pressure begins to exit off the coastline. A gradual warm up will begin as well which sets us up for the long range portion of the forecast.

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/. The high pressure ridge will crest across New England on Sunday and continue eastward into the Central Atlantic and strengthen on Monday and Tuesday. A shortwave will dive southeast through the High Plains over the weekend and will lead to the development of low pressure across the Great Lakes on Monday. The low will strengthen as it rides east-northeastward through the eastern Great Lakes and down the Saint Lawrence River Valley through late Tuesday. Moisture will ride north on the western periphery of the ridge, and the strengthening low pressure center will lead to the development of widespread precipitation across the northeast. Some spotty precipitation is possible by the late morning hours Monday, but the bulk of the precipitation looks to arrive late in the afternoon and evening Monday. The steadiest precipitation from this round looks most likely to wind down by Tuesday Morning, but showers may linger through the afternoon on Tuesday.

The progression of the frontal boundary has been the subject of some disagreement between the models late Tuesday and into Wednesday. The GFS has been progressively slower with the frontal passage over the past several runs, and the latest ECMWF has lurched to a slower fropa solution. This has implications for precipitation, with another round of moisture riding north along this front late Tuesday and into early Wednesday. This would lead to another period of predominantly rainfall, with very little if any break from the first round.

An extended period of warm air advection will initiate on Sunday, occuring above the surface earlier on Sunday. Temperatures will be slow to rise above freezing near the surface across interior sections through Monday morning, but the threat for any light freezing rain at the onset of the precipitation appears to be diminishing with the arrival of the precipitation not being until later on the day Monday. Additionally, with the extended period of WAA lasting into Tuesday, warming above freezing appears inevitable at this point across the entire CWA, with temperatures warming into the 50s across the coastal plain.

Once the frontal boundary passes, CAA will take hold on Wednesday as an Arctic high pressure center builds across the region Thursday and Friday. Long range deterministic models and ensembles support below normal temperatures late in the week, perhaps aided by a secondary cold front. Unsettled weather is likely to persist after cold FROPA under mean troughing, most likely relegated to the upslopes.

AVIATION /16Z FRIDAY THROUGH TUESDAY/. Short Term . VFR conditions in the north with MVFR and areas of LIFR conditions in snow over southern sections today. Conditions improve tonight outside the mountains on brisk northwesterly breezes. VFR conditions will then dominate through Sunday.

Long Term . Ceilings lower and rain overspreads the area Monday with likely degradation to MVFR CIGS, IFR CIGs/VSBY in pockets of heavier rainfall. Southerly surface winds generally <15kts gradually turn westerly by Wednesday behind the cold front with gusty winds likely. Remaining rain gradually turns to snow Tuesday night into Wednesday with additional drops in VSBY likely.

MARINE. Short Term . Winds continue to gradually ease this morning. SCAs are now in effect for late tonight into Saturday. Northwesterly winds will increase behind the departing clipper tonight.

Long Term . Along with SCA seas, a period or two of Gale Force winds are possible, primarily Monday and Tuesday nights. Timing may differ based on model trends.

GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . None. MARINE . Small Craft Advisory from midnight tonight to 4 PM EST Saturday for ANZ150-152-154.



NEAR TERM . Hanes SHORT TERM . Cannon LONG TERM . Casey/Clair


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
IOSN3 - Isle of Shoals, NH 6 mi51 min SW 8 G 8.9 30°F 1015.1 hPa (-1.1)30°F
CMLN3 7 mi167 min 9.9
BGXN3 - Great Bay Reserve, NH 8 mi66 min SSW 1 29°F 1015 hPa27°F
44030 - Buoy B0102 - Western Maine Shelf 22 mi107 min WSW 16 G 19 32°F 2 ft1015.3 hPa
WELM1 - 8419317 - Wells, ME 26 mi57 min W 5.1 G 8 30°F 39°F1015.7 hPa
WEXM1 - Wells Reserve, ME 27 mi51 min WSW 4.1 30°F 25°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 32 mi107 min W 14 G 18 36°F 46°F2 ft1014.1 hPa
44098 - Jeffrey's Ledge, NH (160) 32 mi43 min 48°F3 ft
44013 - BOSTON 16 NM East of Boston, MA 43 mi61 min SSW 7.8 G 12 37°F 48°F1 ft1015.1 hPa (-1.7)24°F
BHBM3 - 8443970 - Boston, MA 46 mi57 min 33°F 41°F1014 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 49 mi61 min SW 9.7 G 14 33°F 43°F2 ft1015 hPa (-0.5)18°F

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH10 mi1.9 hrsSSW 51.25 miLight Snow Fog/Mist29°F24°F83%1015.6 hPa
Rochester - Skyhaven Airport, NH24 mi60 minN 01.25 miLight Snow Fog/Mist29°F25°F85%1014.5 hPa

Link to 5 minute data for KPSM

Wind History from PSM (wind in knots)
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1 day agoS4SW3S4CalmSW3W4W3SW5W5W3W4W5W5W3CalmSW5W4W4CalmW10W10W9
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Tide / Current Tables for Gosport Harbor, Isles of Shoals, New Hampshire
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Gosport Harbor
Click for Map
Fri -- 12:14 AM EST     1.16 feet Low Tide
Fri -- 12:59 AM EST     Moonset
Fri -- 06:37 AM EST     7.84 feet High Tide
Fri -- 06:58 AM EST     Sunrise
Fri -- 12:44 PM EST     1.46 feet Low Tide
Fri -- 01:32 PM EST     Moonrise
Fri -- 04:07 PM EST     Sunset
Fri -- 06:55 PM EST     7.67 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.42.33.95.66.97.77.87.15.742.51.71.52.13.356.47.47.77.264.32.7

Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
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Portsmouth Harbor Entrance
Click for Map
Fri -- 01:00 AM EST     Moonset
Fri -- 02:20 AM EST     0.00 knots Slack
Fri -- 04:07 AM EST     0.86 knots Max Flood
Fri -- 06:59 AM EST     Sunrise
Fri -- 08:16 AM EST     -0.00 knots Slack
Fri -- 10:50 AM EST     -1.39 knots Max Ebb
Fri -- 01:33 PM EST     Moonrise
Fri -- 02:54 PM EST     0.00 knots Slack
Fri -- 04:07 PM EST     Sunset
Fri -- 04:27 PM EST     0.67 knots Max Flood
Fri -- 08:21 PM EST     -0.00 knots Slack
Fri -- 11:05 PM EST     -1.53 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.3-1-0.30.50.90.70.60.60.2-0.6-1.2-1.4-1.3-1.1-0.70.10.60.60.40.40.2-0.5-1.2-1.5

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Gray/Portland, ME (15,3,4,5)
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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.