Sunday, February18, 2018 L-36.com


Marine Weather and Tides
Hampton Beach, NH

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:33AMSunset 5:21PM Sunday February 18, 2018 4:02 AM EST (09:02 UTC) Moonrise 9:10AMMoonset 9:15PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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 Am Est Sun Feb 18 2018
.small craft advisory in effect through this afternoon...
Today..NW winds 10 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Snow likely with a chance of showers this morning. Vsby variable to less than one quarter nm this morning.
Tonight..W winds 5 to 15 kt, becoming sw 5 to 10 kt after midnight. Seas 2 to 4 ft.
Mon..S winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 3 to 5 ft.
Mon night..S winds 15 to 20 kt, becoming sw 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. Rain. Patchy fog.
Tue..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain in the morning. Patchy fog in the morning.
Tue night..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog.
Wed..SW winds 10 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog.
Wed night..W winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Thu..N winds 5 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Thu night..NE winds 5 to 10 kt. Seas 2 to 3 ft.
ANZ100 336 Am Est Sun Feb 18 2018
Synopsis for stonington me to merrimack river ma out to 25 nm.. Low pressure will quickly move away from the waters today. High pressure will build over the waters late Sunday. A southerly flow will develop on the back side of the high for Monday and Tuesday and continuing into Wednesday. A cold front will cross the waters late Wednesday into Wednesday evening with high pressure following.

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 180851
afdgyx
area forecast discussion
national weather service gray me
351 am est Sun feb 18 2018

Synopsis
Low pressure will move rapidly to the east today. High pressure
will crest overhead tonight and move east of northern new
england Monday. A warm front will move north of the region
Tuesday and usher in very warm air for the time of year. A cold
front will move through Thursday ushering in some cooler air for
the end of the week.

Near term today
A broad area of diffluence aloft exists in the left exit region
of an upper level jet streak nosing thru the northeast. A fast
moving... But amplifying... S WV trof is also driving low pressure
development in the gulf of me. The broad lift over the area is
producing widespread light snow. This is combining with a more
narrowly focused band of occasionally heavy snow due to
frontogenetical forcing related to cyclogensis off the coast.

That stronger forcing for ascent is mainly located in the snow
growth zone... Leading to efficient production of dendrites... And
relatively warm near surface layer leading to clumps of
aggregates. This is likely what is leading to the relatively
higher visibility in heavy snow as well. With little wind this
is accumulating nicely across SRN nh and swrn me. I expect
fairly widespread 4 to 7 inch amounts in that zone at
daybreak... Which will compact and begin melting as temps warm.

Expanded the winter wx advisories nwwd... And contemplated
expanding warnings... But I expect impacts have already occurred
and only an hour or two of appreciable snow accumulation left.

Readings are expected to warm nicely in the wake of low pressure
today. Mix down tools bring readings well into the 30s... To near
40 near the coast. I did nudge the forecast down from those
values just a little bit for melting effects today however.

Short term tonight through 6 pm Monday
High pressure builds in to our SW tonight... With surface ridge
extending nwd thru the forecast area. It will cool quickly
especially in any areas that keep a good deal of fresh snow. I
did not get too aggressive on radiational cooling
though... Because return flow begins overnight and some higher
clouds may encroach on the forecast area. But with readings
below freezing we will have to watch out for refreezing of
melted snow and icy spots on area roads. By Mon mixing to h9
will lead to widespread 40s across the forecast area. This will
begin a period of very mild wx across the region. In that return
flow... Increasing moisture will also lead to increasing clouds
and perhaps some precip moving into WRN zones late in the day
mon. Some snow is possible at elevation... But with mild temps
most precip... If any... Should fall as rain.

Long term Monday night through Saturday
Model guidance continues to show ridging aloft developing off
the southeast coast of the united states. This will likely
remain in place through the week. This will allow some very warm
air to surge north as the storm track will remain to the west of
new england.

A warm front will move north Monday night which will bring in
some light precipitation. Precipitation will likely begin as a
mix in the mountains but change to rain Tuesday. Tuesday and
Wednesday will be very warm with temperatures on Wednesday
approaching 70 degrees in southern new hampshire.

***records for pwm & con***
tue wed
pwm 61 1994 59 1953
con 66 1930 64 1872
also expect at least patchy fog Monday night into through
Wednesday.

A cold front will slip through the forecast area Thursday with
cooler weather but still above normal temperatures for Thursday
and Friday.

Low pressure again moves into the region Friday with rain
showers or snow showers over the weekend.

Aviation 09z Sunday through Thursday
Short term... Widespread ifr and lifr in sn this morning will
quickly end from W to E as low pressure develops in the gulf of
me. NW flow developing will bringVFR quickly back to areas S of
the mtns... While some lingering upslope moisture will likely
keep a MVFR cig around hie. A few surface wind gusts to around
20 kts are possible this afternoon in wnwly flow at all
terminals.VFR conditions expected tonight and for most of mon.

Late in the period some MVFR conditions and possibly -shra may
move into WRN zones around hie and leb.

Long term... Expect ifr Monday night in fog and rain and Tuesday
night in fog. MVFR ceilings possible Tuesday improving toVFR
Thursday.

Marine
Short term... SCA remains in effect for all waters except casco
bay for this afternoon in the wake of departing low pressure.

Winds and seas gradually diminish late today and tonight as high
pressure builds in from the sw. Return flow over the waters is
forecast to increase quickly mon... But model guidance tends to
overforecast sly flow over the cold water. I preferred to lower
wind speeds and also took the lower wna wave guidance. Still
some marginal SCA conditions are possible outside the bays late
mon.

Long term... Expect SCA will be needed Tuesday and Wednesday
because of an increasing southwest wind and increasing seas.

Hydrology
We will have to monitor the rivers closely next week as the
warm weather and some rain may lead to enough runoff to cause
ice jam flooding. There are several locations with ice jams in
maine and new hampshire. Looks like a 72 hour period or longer
with temperatures remaining above freezing. It is possible that
the warmer weather will weaken the ice so that any rise in river
levels will just move the ice harmlessly downriver. QPF should
be fairly light with around one quarter to one third of an inch
expected Monday night into Tuesday.

Gyx watches warnings advisories
Me... Winter weather advisory until 7 am est this morning for mez012-
018>020.

Winter weather advisory until 10 am est this morning for
mez024>028.

Winter storm warning until 7 am est this morning for mez023.

Nh... Winter weather advisory until 7 am est this morning for nhz006-
008>013-015.

Winter storm warning until 7 am est this morning for nhz014.

Marine... Small craft advisory until 4 pm est this afternoon for
anz150>152-154.

Synopsis... Hawley
near term... Legro
short term... Legro
long term... Hawley
aviation... Legro
marine... Hawley legro
hydrology... Hawley


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
IOSN3 - Isle of Shoals, NH 9 mi62 min ENE 7 G 7 32°F 1013 hPa (-5.1)32°F
BGXN3 - Great Bay Reserve, NH 12 mi77 min Calm 33°F 1015 hPa33°F
44030 - Buoy B0102 - Western Maine Shelf 27 mi118 min SSE 12 G 14 34°F 40°F5 ft
44029 - Buoy A0102 - Mass. Bay/Stellwagen 28 mi118 min 7.8 G 9.7 33°F 39°F4 ft1013.3 hPa
WELM1 - 8419317 - Wells, ME 32 mi44 min NNE 1.9 G 2.9 32°F 37°F1013.8 hPa
WEXM1 - Wells Reserve, ME 33 mi62 min Calm 33°F 33°F
44098 - Jeffrey's Ledge, NH (160) 33 mi56 min 42°F5 ft
44013 - BOSTON 16 NM East of Boston, MA 38 mi72 min S 1.9 G 1.9 35°F 39°F3 ft1012.1 hPa (-5.6)
BHBM3 - 8443970 - Boston, MA 40 mi44 min 32°F 1011.4 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 mi66 minN 00.75 miLight Snow Fog/Mist32°F31°F98%1013.5 hPa
Lawrence Municipal Airport, MA22 mi68 minN 51.00 miLight Snow Fog/Mist33°F30°F92%1013.5 hPa
Beverly, Beverly Municipal Airport, MA23 mi69 minNNE 41.50 miLight Snow Fog/Mist33°F32°F96%1012.2 hPa

Wind History from PSM (wind in knots)
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Last 24hrW11NW12W6W6W10N8N4CalmE7SE9SE10SE10SE12SE10----S10S10S8SW4SE5SE4CalmCalm
1 day agoCalmCalmCalmS4SW3CalmCalmW4W5W4W4W5W4W7NW20
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2 days agoSW4SW3CalmCalmSW2SW4S3S5SW3S4SW6SE5SW9SW6SW7SW6SW7SW8W5SW4CalmCalmS3NW5

Tide / Current Tables for Hampton Harbor, New Hampshire
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Hampton Harbor
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Sun -- 12:38 AM EST     8.38 feet High Tide
Sun -- 06:36 AM EST     Sunrise
Sun -- 06:55 AM EST     0.17 feet Low Tide
Sun -- 08:10 AM EST     Moonrise
Sun -- 12:49 PM EST     8.86 feet High Tide
Sun -- 05:18 PM EST     Sunset
Sun -- 07:19 PM EST     -0.22 feet Low Tide
Sun -- 08:15 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.28.37.66420.60.20.82.54.778.58.88.26.84.72.50.7-0.20.11.43.55.8

Tide / Current Tables for Newburyport (Merrimack River), Massachusetts Current
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Newburyport (Merrimack River)
Click for Map
Sun -- 01:35 AM EST     -0.00 knots Slack
Sun -- 04:04 AM EST     -1.48 knots Max Ebb
Sun -- 06:36 AM EST     Sunrise
Sun -- 07:50 AM EST     0.00 knots Slack
Sun -- 08:10 AM EST     Moonrise
Sun -- 11:38 AM EST     1.49 knots Max Flood
Sun -- 01:51 PM EST     -0.00 knots Slack
Sun -- 04:21 PM EST     -1.57 knots Max Ebb
Sun -- 05:18 PM EST     Sunset
Sun -- 08:06 PM EST     0.00 knots Slack
Sun -- 08:15 PM EST     Moonset
Sun -- 11:55 PM EST     1.55 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.50.7-0.4-1.2-1.5-1.3-0.9-0.60.211.41.51.50.9-0.2-1.1-1.5-1.5-1.1-0.7-0.10.81.41.5

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Gray/Portland, ME (4,6,7,8)
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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.