Saturday, June24, 2017 L-36.com


Marine Weather and Tides
Portsmouth, NH

Version 3.4
What's New / NOTES
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 5:03AMSunset 8:28PM Saturday June 24, 2017 6:19 AM EDT (10:19 UTC) Moonrise 5:47AMMoonset 8:56PM Illumination 0% Phase: New Moon; Moon at 0 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- 338 Am Edt Sat Jun 24 2017
.small craft advisory in effect until noon edt today...
Today..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft, subsiding to 2 to 4 ft this afternoon. A slight chance of tstms this morning. Areas of fog this morning. A chance of showers. Vsby 1 to 3 nm.
Tonight..W winds around 10 kt. Seas 2 to 4 ft.
Sun..SW winds around 10 kt. Seas 2 to 4 ft.
Sun night..SW winds 10 to 15 kt, becoming W after midnight. Seas 2 to 4 ft.
Mon..SW winds 5 to 10 kt. Seas 2 to 3 ft.
Mon night..W winds 5 to 10 kt. Seas around 2 ft.
Tue..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Tue night..W winds 5 to 10 kt. Seas around 2 ft.
Wed..W winds 5 to 10 kt. Seas around 2 ft.
Wed night..SW winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms.
ANZ100 338 Am Edt Sat Jun 24 2017
Synopsis for stonington me to merrimack river ma out to 25 nm.. A series of fronts will cross over the waters this weekend bringing periods of showers and fog. High pressure builds eastward through the ohio valley early next week and to the carolinas on Wednesday, keeping a generally west flow over the gulf of maine.

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 240814
afdgyx
area forecast discussion
national weather service gray me
414 am edt Sat jun 24 2017

Synopsis
Tropical moisture from the remnants of tropical storm cindy and
a passing frontal system will bring scattered showers and
thunderstorms this morning. A series of surface troughs and weak
cold fronts will cross the area this weekend into early next
week bringing us the chance of showers from time to time...

especially in central and northern areas.

Near term tonight
Shower activity is beginning to pick up again across eastern
and northern sections of the forecast area with the approach of
a frontal system. Convection will be less focused with a pre-
frontal trough as well as a cold front crossing the region and
broad but weak instability. QPF looks light overall but there is
still the possibility of heavy downpours... Especially over the
mountains... With moisture from TS cindy lingering. A few
rumbles of thunder are possible but overall instability is weak.

Convection should exit the coast by mid-morning with the
remnants of cindy moving offshore near CAPE cod bringing
additional showers to portsmouth and the islands in the gulf
of maine. This baroclinic zone sits offshore with additional
short wave energy moving along it and producing rainfall well
off the coast this afternoon and evening. Drier air moves in
today with temperatures warming into the upper 70s to upper 80s
with gusty SW to W winds in place.

Short term tonight and Sunday
Another cold front will hang up along the canadian border and
produce showers and scattered thunderstorms for mainly the
mountains Sunday... Especially in the heat of the afternoon with
readings warming into the 70s and 80s once again. A robust short
wave approaches towards the late afternoon and evening
increasing thunderstorm activity... But earlier cloud cover and
showers will keep any strong storms from forming. Showers will
diminish in the evening with drier air arriving and the loss of
heating.

Expect temperatures to fall back into the upper 40s lower 50s
in the mountains with mid to upper 50s to the south and east for
overnight lows.

Long term Sunday night through Friday
Upper air wave pattern this weekend features a building west
coast ridge and a broad trough over the eastern half of north
america. This is allowing the southwestern deserts to bake while
the center and eastern parts of the country enjoy cooler air
spilling down from the northern parts of canada. New england is
in the southwesterly flow ahead of the broader eastern trough
with frequent waves tracking through the flow sending weak cold
fronts through the region. During the first half of next week, a
trough will drop down out of the gulf of alaska and help to
squash the west coast ridge to the east, in turn forcing the
eastern trough to make a move to the east. Once it exits a broad
west to southwest flow will transport warmth from the middle of
the continent eastward into new england late in the week.

Expect gradually cooling temperatures Sunday through Tuesday as
the eastern trough slowly pushes into the area. Several waves
within the broader trough will rotate through, with each of
these waves potentially bringing a round of showers especially
if they move through during the daytime. The best chance of
showers and possibly thunderstorms will be Tuesday when the main
trough axis crosses through new england. High temperatures will
generally be in the 70s, with lows in the 50s. After the trough
departs on Wednesday the ridge will begin affecting the area on
Thursday as warm, humid air begins to spill into the area. A
wave tracking through ontario and quebec will organize a warm
front to push through new england on Thursday, the leading edge
of the warmer air. Some showers can be expect along and north of
that warm front while warm, humid weather will arrive south of
it. The entire area looks to get into the warmer air by Friday.

Aviation 07z Saturday through Wednesday
Short term...

pockets of MVFR conditions are occurring this morning in lower
ceilings -shra and the occasional -tsra associated with a cold
frontal passage. TS cindy is also contributing to the moist
airmass. Fog has yet to affect rkd but is expected to affect
them briefly. Most of the dense fog is expected to remain over
eastern maine and offshore this morning. Conditions improve to
vfr as drier air works in today on developing gusty westerly
winds. Winds diminish after sunset.

Long term... Generally expectingVFR conditions late this weekend
through the middle of next week. However, occasional showers are
also possible especially each afternoon, mainly in the interior.

Marine
Short term... Winds will be dropping today with the generic sca
likely to be replaced around mid-morning by a SCA for hazardous
seas for perhaps the easternmost outer waters for a few more
hours. Winds waves continue to subside tonight.

Long term... Expect a general light westerly flow over the
waters through the first half of next week.

Tides coastal flooding
Astronomical high tides will continue through the weekend with
the possibility of minor flooding particularly with the tide
late tonight at 12:05 am at portland. The astronomical high
tide will be 11.9 feet with a storm tide overnight likely
coming in between 12.2 and 12.7 feet. With little in the way of
wave action, expect only very minor issues along the coastline.

A headline of some sort will be needed today to cover this
concern.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... Small craft advisory until noon edt today for anz150-152-154.

Near term... Hanes
short term... Hanes
long term... Kimble


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BGXN3 - Great Bay Reserve, NH 3 mi94 min SW 5.1 75°F 999 hPa73°F
IOSN3 - Isle of Shoals, NH 11 mi79 min S 24 G 25 66°F 998.2 hPa (-1.6)66°F
44030 - Buoy B0102 - Western Maine Shelf 19 mi75 min SSW 12 G 14 58°F 53°F3 ft998.4 hPa
WELM1 - 8419317 - Wells, ME 20 mi49 min SSW 5.1 G 6 62°F 55°F998.2 hPa
WEXM1 - Wells Reserve, ME 21 mi79 min S 2.9 63°F 63°F
44098 - Jeffrey's Ledge, NH (160) 37 mi43 min 60°F5 ft
44029 - Buoy A0102 - Mass. Bay/Stellwagen 40 mi75 min S 14 G 16 63°F 58°F3 ft999.1 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 45 mi89 min SSW 14 G 16 59°F 54°F4 ft997.3 hPa (-2.0)59°F
CASM1 - 8418150 - Portland, ME 49 mi49 min 69°F 55°F997.7 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH3 mi80 minSSW 87.00 miMostly Cloudy75°F71°F89%998.2 hPa
Rochester - Skyhaven Airport, NH16 mi28 minVar 510.00 miFair73°F70°F90%997.7 hPa
Sanford, Sanford Regional Airport, ME22 mi23 minSSW 610.00 miMostly Cloudy73°F71°F94%999.2 hPa

Wind History from PSM (wind in knots)
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Last 24hrSE3CalmCalmCalmE5E3SE6E6SE12SE8SE9SE10SE9S10S7SW11SW6SW11SW6S4SW7SW8SW8SW8
1 day agoSW6W8SW8W7W7W6W8W6W7W7SE6SE8SE5CalmCalmCalmSE3CalmCalmCalmCalmS4W3Calm
2 days agoSW3SW6SW5SW6W9W8
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Tide / Current Tables for Atlantic Heights, Piscataqua River, New Hampshire
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Atlantic Heights
Click for Map
Sat -- 05:04 AM EDT     Sunrise
Sat -- 05:47 AM EDT     Moonrise
Sat -- 06:07 AM EDT     -1.44 feet Low Tide
Sat -- 12:31 PM EDT     8.50 feet High Tide
Sat -- 06:18 PM EDT     -0.52 feet Low Tide
Sat -- 08:26 PM EDT     Sunset
Sat -- 08:56 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
9.78.86.94.11.4-0.6-1.4-10.62.95.37.38.48.47.25.12.60.6-0.5-0.21.13.35.98.1

Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
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Portsmouth Harbor Entrance
Click for Map
Sat -- 01:05 AM EDT     -0.00 knots Slack
Sat -- 04:00 AM EDT     -2.56 knots Max Ebb
Sat -- 05:04 AM EDT     Sunrise
Sat -- 05:47 AM EDT     Moonrise
Sat -- 07:52 AM EDT     0.00 knots Slack
Sat -- 09:56 AM EDT     1.58 knots Max Flood
Sat -- 01:38 PM EDT     -0.00 knots Slack
Sat -- 04:20 PM EDT     -2.23 knots Max Ebb
Sat -- 07:59 PM EDT     0.00 knots Slack
Sat -- 08:26 PM EDT     Sunset
Sat -- 08:55 PM EDT     Moonset
Sat -- 10:15 PM EDT     1.85 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.1-1.1-2.2-2.6-2.3-1.8-10.21.21.61.310.5-0.4-1.5-2.2-2.1-1.7-101.21.81.7

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 (6,6,7,8)
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Ground Weather Radar Station Portland, ME
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weather_mapweather_map weather_map

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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.