Monday, March25, 2019 L-36.com


Marine Weather and Tides
Portsmouth, NH

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:35AMSunset 7:02PM Monday March 25, 2019 1:18 AM EDT (05:18 UTC) Moonrise 12:00AMMoonset 9:36AM Illumination 82% Phase: Waning Gibbous; Moon at 19 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- 1107 Pm Edt Sun Mar 24 2019
Overnight..NW winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of showers.
Mon..N winds 10 to 15 kt, becoming nw in the afternoon. Seas 2 to 3 ft.
Mon night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Tue..NW winds 10 to 15 kt. Seas 2 to 3 ft.
Tue night..N winds 10 to 15 kt with gusts up to 20 kt. Seas 1 foot or less.
Wed..N winds 5 to 10 kt with gusts up to 20 kt, becoming se in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon.
Wed night..S winds around 10 kt. Seas 2 to 4 ft.
Thu..S winds 10 to 20 kt. Seas 3 to 5 ft.
Thu night..S winds 10 to 20 kt. Seas 4 to 6 ft.
Fri..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft.
Fri night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
ANZ100 1107 Pm Edt Sun Mar 24 2019
Synopsis for stonington me to merrimack river ma out to 25 nm.. A cold front will approach from the north and cross the waters tonight. High pressure then builds over the waters through Wednesday, and then shifts east into the atlantic late in the week. With that high pressure in control conditions will generally remain near to below those hazardous to small craft. &&


7 Day Forecast for Marine Location Near Portsmouth, NH
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location: 43.08, -70.77     debug


Area Discussion for - Gray/Portland, ME
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Fxus61 kgyx 250300
afdgyx
area forecast discussion
national weather service gray me
1100 pm edt Sun mar 24 2019

Synopsis
A cold front will move through the forecast are tonight. Colder
air will settle over the area Monday and Tuesday. High pressure
will move east of northern new england Wednesday which will
begin the warming trend. A cold front will move into the area
Saturday afternoon.

Near term until 6 am Monday morning
1100 pm update...

quick update to tweak pops and wx grids... Mainly to match up
better with surrounding offices. Cold front continue to
gradually drop south late this evening with a few snow showers
beginning to show up in northern zones. Expect this activity to
diminish as the front contines to drop south. No major changes
planned to current forecast.

800 pm update...

weak cold front continues to slowly drop south into northern
zones early this evening. Some snow showers activity showing up
in surface obs north of the border and this activity will
continue to diminish as it sags into northern zones late this
evening. Farther south looking for variable high clouds through
midnight. Have adjusted pops in northern zones to account for
slower southward progress of snow shower activity. Have also
tweaked area temps tds. No other changes planned attm.

Prev disc...

nice and mild across the forecast area currently... With
downsloping winds helping to boost temps well into the 50s. A
cold front will sag into the area tonight. With flow and forcing
mainly parallel to the boundary... It will be slow going and not
much lift. A narrow band of sprinkles or flurries is most
likely... Especially given the dry low level air. I have some
slight chance pop for tonight... But really not expecting much in
the way of measurable precip... Mostly enough to notice
flakes rain drops on the windshield or in the flood lights.

Coldest readings will be behind the front early in the morning
mon... With areas S of the front struggling to get to near
freezing.

Short term 6 am Monday morning through Monday night
Cooler air expected Mon as CAA behind the front continues. Deep
mixing to around h8 will only support highs topping out in the
30s to near 40. Warmest temps will be over SRN nh... Where
readings near 45 are possible. Also looking at deep dry
air... With forecast soundings indicating dewpoints closer to 0
degrees than the near 10 degrees from some guidance. High
pressure noses in Mon night and may allow for better decoupling
and much colder overnight lows.

Long term Tuesday through Sunday
Colder air moves into the region for Tuesday which should be the
coldest day of the next 7. High pressure will move off the coast
Wednesday turning the wind to the south and southwest beginning
the warming trend. There are some differences for the weekend as
both GFS and ECMWF bring a cold front down over the northern
portions of the forecast area late in the day Friday. There
could be some light precipitation especially in northern zones
Friday. This front will certainly have an impact on temperatures
depending on how far south it progresses. For now expect both
Friday and Saturday to be warm days for southern locations with
temperatures flirting with 60. Expect Saturday to be cooler in
the mountains with high temperatures in the mid 40s as the front
will bisect the forecast area. The GFS has the front hanging up
in central maine Saturday as low pressure moves northeast along
it and drives the cold front off the coast Sunday morning. The
ecmwf on the other hand moves the front north Sunday keeping the
entire forecast area warm before low pressure moves through
Monday morning bringing in colder air.

Aviation 03z Monday through Friday
Short term...VFR conditions expected to prevail thru the period.

Any remaining gusts near 20kt will diminish around sunset. Cold
front drops thru the area overnight. Mainly an increase in high
clouds though a -shsn is possible. Confidence was too low in any
restrictions to vsby to include in tafs. Skc and nnw winds mon
into Mon night.

Long term...VFR expected Tuesday through Friday.

Marine
Short term... W flow turns nly behind a cold front tonight. Wind
gusts are expected to remain below 25kt. Conditions remain just
below SCA thresholds into mon... And no headlines are expected.

Long term... Winds and seas will be increasing as a southwest
wind develops over the waters late in the week.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BGXN3 - Great Bay Reserve, NH 3 mi93 min WSW 7 44°F 1014 hPa21°F
IOSN3 - Isle of Shoals, NH 11 mi78 min WSW 17 G 18 47°F 1013.2 hPa (+0.6)14°F
44030 - Buoy B0102 - Western Maine Shelf 19 mi74 min W 12 G 12 42°F 38°F2 ft1012.4 hPa
WELM1 - 8419317 - Wells, ME 20 mi30 min 43°F 38°F1013.6 hPa
WEXM1 - Wells Reserve, ME 21 mi78 min SW 4.1 42°F 17°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 40 mi74 min W 12 G 16 43°F 38°F2 ft1013.1 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 45 mi28 min WSW 12 G 14 43°F 38°F1 ft1012.4 hPa (-0.5)26°F
CASM1 - 8418150 - Portland, ME 49 mi36 min 44°F 38°F

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH3 mi82 minWSW 610.00 miMostly Cloudy45°F16°F31%1013.5 hPa
Rochester - Skyhaven Airport, NH16 mi27 minWSW 310.00 miFair42°F21°F45%1013.1 hPa
Sanford, Sanford Regional Airport, ME22 mi22 minSW 710.00 miFair39°F23°F53%1013.7 hPa

Wind History from PSM (wind in knots)
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Tide / Current Tables for Atlantic Heights, Piscataqua River, New Hampshire
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Atlantic Heights
Click for Map
Mon -- 03:33 AM EDT     8.70 feet High Tide
Mon -- 06:37 AM EDT     Sunrise
Mon -- 09:35 AM EDT     Moonset
Mon -- 09:44 AM EDT     -0.67 feet Low Tide
Mon -- 04:08 PM EDT     7.92 feet High Tide
Mon -- 07:01 PM EDT     Sunset
Mon -- 10:00 PM EDT     0.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.45.77.58.58.67.65.63.11-0.4-0.60.11.83.95.97.37.97.56.24.22.10.70.10.6

Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
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Portsmouth Harbor Entrance
Click for Map
Mon -- 12:57 AM EDT     1.56 knots Max Flood
Mon -- 04:43 AM EDT     -0.00 knots Slack
Mon -- 06:37 AM EDT     Sunrise
Mon -- 07:31 AM EDT     -2.18 knots Max Ebb
Mon -- 09:35 AM EDT     Moonset
Mon -- 11:23 AM EDT     0.00 knots Slack
Mon -- 01:23 PM EDT     1.33 knots Max Flood
Mon -- 05:08 PM EDT     -0.00 knots Slack
Mon -- 07:00 PM EDT     Sunset
Mon -- 07:52 PM EDT     -1.97 knots Max Ebb
Mon -- 11:40 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.61.310.6-0.3-1.4-2.1-2.1-1.8-1.3-0.40.61.31.210.70.1-0.9-1.7-2-1.7-1.3-0.7

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.
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Wind Forecast for Gray/Portland, ME (1,6,7,8)
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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.