Saturday, November18, 2017

Marine Weather and Tides
South Hooksett, 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 6:41AMSunset 4:20PM Saturday November 18, 2017 3:07 AM EST (08:07 UTC) Moonrise 7:32AMMoonset 5:53PM Illumination 0% Phase: New Moon; Moon at 29 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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ANZ230 Boston Harbor- 116 Am Est Sat Nov 18 2017
.gale watch in effect from Sunday morning through Sunday evening...
Rest of tonight..W winds 5 to 10 kt. Waves around 2 ft.
Sat..SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 foot or less.
Sat night..S winds 5 to 10 kt with gusts up to 30 kt. Waves around 2 ft. Patchy fog. Rain likely. Vsby 1 to 3 nm.
Sun..SW winds 10 to 15 kt, becoming W 15 to 20 kt in the afternoon. Gusts up to 35 kt. Waves around 2 ft. Patchy fog. Showers likely. Vsby 1 nm or less.
Sun night..W winds 15 to 20 kt with gusts up to 35 kt. Waves around 2 ft.
Mon..W winds 15 to 20 kt with gusts up to 35 kt. Waves around 2 ft.
Mon night..W winds 10 to 15 kt. Gusts up to 30 kt, decreasing to 20 kt after midnight. Waves around 2 ft.
Tue..SW winds around 10 kt. Waves 1 foot or less.
Tue night..SW winds around 10 kt with gusts up to 20 kt. Waves 1 foot or less.
Wed..W winds 5 to 10 kt. Waves 1 foot or less.
Wed night..NW winds 5 to 10 kt. Waves 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
ANZ200 116 Am Est Sat Nov 18 2017
Synopsis for massachusetts and rhode island coastal waters.. High pressure builds across the waters tonight and early Sat. Intensifying low pres tracks across the saint lawrence river valley Sat night and Sun, with its attending strong cold front sweeping across the new england waters Sun afternoon. High pres then builds into the water early next week. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit and follow the current hazards link above the map on the left.

7 Day Forecast for Marine Location Near South Hooksett, NH
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location: 43.01, -71.38     debug

Area Discussion for - Gray/Portland, ME
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Fxus61 kgyx 180307
area forecast discussion
national weather service gray me
1007 pm est Fri nov 17 2017

Northwesterly winds will diminish this evening as high pressure
continues to build in form the west. The high will crest across
the area early Saturday before gradually sliding offshore. A warm
front will lift northward on Saturday night with a mix of rain
showers south and rain snow in the north. A cold front will
cross the region on Sunday bringing gusty winds and accumulating
upslope snows to the mountains. High pressure builds in for the
start of next week.

Near term until 6 am Saturday morning

have updated the grids based on current conditions and latest
set of mesoscale models. Upslope clouds that were hanging in
tough over the western mountains of maine and northermost new
hampshire earlier this evening will continue to slowly dissipate
with time. Elsewhere, clear skies will continue with downslope
conditions. Winds have decoupled in many areas except for the
high terrain and in the concord area of new hampshire.

Have made minor adjustments to the overnight lows and dew points
based on current trends.

Prev disc...

at 19z... A 985 millibar low was over the canadian
maritimes while a 1024 millibar ridge was draped across the
eastern great lakes. The pressure gradient between these two
features will continue to relax over the next few hours with
northwest winds gusty northwest winds diminishing. With the
exception of some lingering upslope clouds across the mountains
this evening... A clear and cold night is on the way with lows in
the teens and lower 20s.

Short term 6 am Saturday morning through Saturday night
On Saturday... The high pressure ridge will crest across the
forecast area during the morning before quickly retreating
offshore by afternoon. A milder return southerly flow will
develop by afternoon along with warm air advection clouds
arriving from the west ahead of the next progressive shortwave
impulse and associated low pressure system. Highs on Saturday
will average a good five to seven degrees milder compared to
today. Any precipitation that arrives will hold off until nearly
dusk and be confined to northern and western sections... With any
light wintry mix limited to areas near the international
border. Saturday night... An intensifying surface low tracks
just north of the eastern great lakes across ontario province.

That will push a warm front north across the area with any light
mixed wintry precipitation across the mountains and
international border area changing to plain rain. Expect any
icing or wet snow sleet accumulations to be quite light before
the transition to all rain occurs and temperatures continue to
rise overnight.

Long term Sunday through Friday
Sunday morning begins with low pressure moving along the saint
lawrence river to our north. As it moves north and east, it will
drag a rather robust cold front through the region. Strong
southerly flow ahead of the front will allow temperatures Sunday
morning to start off in the 40s to lower 50s. Right now it looks
like the front should swing through during the late morning and
early afternoon hours. Strong cold air advection sets up just
behind the front. Temperatures will begin to fall sharply during
the afternoon and evening hours. Expect winds of around 35kts to
mix down to the surface at most locations. While this should be
shy of high wind warning criteria, it may be enough to meet wind
advisory criteria. Will hold off on headlines for now and let
later shifts get a better look at things. The front moves
quickly offshore and by Monday morning high pressure will
dominate the eastern united states. Temperatures on Monday will
be around 10 degrees cooler than normal. High pressure remains
in place until Wednesday when another cold front is expected to
move through. This one looks much weaker though and it almost
completely washes out before passing through. It will likely
only consist of a small drop in temperatures and a wind shift.

High pressure remains in place through the end of the period.

Aviation 03z Saturday through Wednesday
Short term through Saturday night ... BecomingVFR throughout
this evening with gusty NW winds diminishing to under 10 kt this
evening.VFR through sat... With MVFR CIGS developing Sat evening
and lowering to ifr in ra and fg with areas of -fzra sleet snow
possible across the mountains.

Long term... Expect mainlyVFR throughout the period. There could
be a short time of ifr MVFR vsbys and CIGS Sunday morning ahead
of the cold front. However, once the front moves throughVFR
conditions will return quickly. Strong gusty winds behind the
front could pose some llws concerns Sunday afternoon and

Short term through Saturday night ... Scas will remain in place
for the outer waters overnight. Gales have been dropped.

Long term... Cold front moving through on Sunday will produce
strong gusty winds Sunday afternoon and evening. Winds will
certainly be strong enough to meet small craft advisory criteria
and may approach gale force.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... Small craft advisory until 5 am est Saturday for anz150-152-


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BGXN3 - Great Bay Reserve, NH 29 mi82 min W 4.1 29°F 1016 hPa17°F
IOSN3 - Isle of Shoals, NH 40 mi67 min WNW 16 G 18 31°F 1014.6 hPa (+0.0)15°F

Wind History for Wells, ME
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Manchester Airport, NH6 mi74 minN 710.00 miFair29°F12°F51%1016 hPa
Concord Municipal Airport, NH15 mi76 minNW 710.00 miFair26°F14°F60%1015.4 hPa
Nashua - Boire Field Airport, NH17 mi71 minWSW 310.00 miFair25°F19°F81%1016.3 hPa
Lawrence Municipal Airport, MA24 mi73 minWNW 310.00 miFair31°F14°F49%1015.7 hPa

Wind History from MHT (wind in knots)
Last 24hrW8
1 day agoCalmCalmCalmCalmN3CalmCalmN3W5W4E6CalmN3N6NW10N5SW3Calm3CalmCalmW6NW12W10
2 days agoN3N4CalmN3N3N3CalmCalmE4S5CalmCalmS4SE3E7SE7SW3CalmCalmCalmCalmCalmSW3Calm

Tide / Current Tables for Riverside, Merrimack River, Massachusetts
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Sat -- 12:34 AM EST     5.83 feet High Tide
Sat -- 06:29 AM EST     Moonrise
Sat -- 06:40 AM EST     Sunrise
Sat -- 06:42 AM EST     New Moon
Sat -- 08:05 AM EST     0.17 feet Low Tide
Sat -- 12:42 PM EST     6.27 feet High Tide
Sat -- 04:18 PM EST     Sunset
Sat -- 04:52 PM EST     Moonset
Sat -- 08:35 PM EST     -0.09 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Merrimacport, Merrimack River, Massachusetts
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Sat -- 12:04 AM EST     7.14 feet High Tide
Sat -- 06:29 AM EST     Moonrise
Sat -- 06:39 AM EST     Sunrise
Sat -- 06:42 AM EST     New Moon
Sat -- 06:43 AM EST     0.25 feet Low Tide
Sat -- 12:12 PM EST     7.69 feet High Tide
Sat -- 04:17 PM EST     Sunset
Sat -- 04:52 PM EST     Moonset
Sat -- 07:13 PM EST     -0.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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

GOES Local Image of Northeast    EDIT

Wind Forecast for Gray/Portland, ME (3,6,7,8)
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Ground Weather Radar Station Boston, MA
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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 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 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.