Wednesday, October18, 2017 L-36.com


Marine Weather and Tides
Portsmouth, 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 7:00AMSunset 5:55PM Wednesday October 18, 2017 7:58 PM EDT (23:58 UTC) Moonrise 5:34AMMoonset 5:46PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 746 Pm Edt Wed Oct 18 2017
Rest of tonight..SW winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 to 3 nm.
Thu..SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Patchy fog in the morning with vsby 1 to 3 nm.
Thu night..W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Fri..NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri night..NW winds 5 to 10 kt. Seas around 2 ft.
Sat..W winds 5 to 10 kt, becoming sw in the afternoon. Seas 2 to 3 ft.
Sat night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sun..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Sun night..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Mon..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Mon night..S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.
ANZ100 746 Pm Edt Wed Oct 18 2017
Synopsis for stonington me to merrimack river ma out to 25 nm.. High pressure will drift off to the southeast through Thursday as a weak cold front approaches from the west. The front will cross the region Thursday night and will be followed by high pressure on Friday. High pressure will hold over the region through Saturday and will drift off to the southeast on Sunday. A slow moving cold front will approach from the west on Monday and will stall to the west of the region on Tuesday.

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 182118 aaa
afdgyx
area forecast discussion... Updated
national weather service gray me
518 pm edt Wed oct 18 2017

Synopsis
High pressure will drift off to the southeast tonight and
Thursday as a weak cold front approaches from the west. The
front will cross the region Thursday night and will be followed
by high pressure on Friday. High pressure will hold over the
region through Saturday and will drift off to the southeast on
Sunday. A slow moving cold front will approach from the west on
Monday and will stall to the west of the region on Tuesday.

Near term until 6 am Thursday morning
515 pm update...

no major changes to the forecast. Skies are clear and
temperatures are still warm at 5 pm. Expecting a good night of
radiational cooling tonight with clear skies, light winds, and
low dew points. Have added more fog to the coastal plains and
the valleys to account for this.

Previous discussion...

quiet weather continues across the region through the short
term as high pressure remains in control over the northeast.

Return flow around high pressure bringing unseasonably mild
temperatures into the region today and this trend will continue
tonight and Thursday. Looking for clear skies and light winds
overnight with lows ranging from the mid 30s north to the mid
40s south.

Short term 6 am Thursday morning through Thursday night
Thursday will again feature mostly sunny skies and temperatures
well above normal. Highs will range from the upper 60s in the
north to the mid 70s in the south. A southwest wind off the
water will cap temps in the mid to upper 60s in midcoast maine.

A moisture starved cold front will bring some high clouds into
northwest zones in the afternoon but any showers should remain
well north of the border.

Weak cold front will cross the region Thursday night with little
more than a period of variable clouds and a wind shift during
the evening hours. May see a brief sprinkle in far northern
zones but pops are generally 20 percent or less. Lows overnight
will range through the 40s.

Long term Friday through Wednesday
The majority of the extended forecast looks like more of the
same fall wx we have been experiencing. Of course that means
decidedly not fall-like wx... As our climate stations are running
6 to 8 degrees above normal for oct so far.

After the trof passes early fri... Ridging aloft and surface high
pressure will build ne. Return flow is forecast to bring h8
temps in the low teens newd... With good support across ensemble
systems. Mixing likely will not reach those levels... Especially
with Sun angle becoming more shallow by the day... But h9 should
be a good estimate. With mid teens temps at that level across
all guidance... Widespread 70s looks likely... With a few warmer
spots pushing 75. I have added a few degrees to the multi-model
consensus Sat and sun.

Beyond the weekend models try and evolve the pattern towards
trofing in the central conus... Progressing it ewd. Operational
model guidance may be rushing it a bit... As ensemble guidance
delays the center of the trof until late next week. As a
result... The bulk of the pop with this forecast package beyond
wed... And confined to Thu fri.

Aviation 21z Wednesday through Monday
Short term...VFR tonight through Thursday night with ifr lifr
ceilings and vsby in morning valley fog.

Long term... WidespreadVFR conditions expected with high
pressure in control of the area. That means cooling overnight
should allow for valley fog... With hie and leb most likely to
see local lifr conditions. Increasing moisture early next week
may allow merrimack river and mht con to start seeing morning
fg too.

Marine
Short term... Sca's will likely be needed for Thursday afternoon
for the outer waters and penobscot bay.

Long term... Quiet wx expected thru the weekend with high
pressure in position S of the waters. As the high moves ewd
early next week... Sw return flow may allow winds and seas to
approach SCA conditions Mon into tue. More likely would be seas
build in excess of 5 ft outside the bays after persistent sw
flow... With winds remaining sub-sca.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... None.

Near term... Hanes
short term... Cannon sinsabaugh
long term... Legro


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BGXN3 - Great Bay Reserve, NH 3 mi73 min E 1.9 50°F 1024 hPa47°F
IOSN3 - Isle of Shoals, NH 11 mi58 min SSW 13 G 14 64°F 1023.6 hPa (+1.1)45°F
44030 - Buoy B0102 - Western Maine Shelf 19 mi114 min SW 5.8 G 7.8 61°F 58°F1 ft1023.7 hPa
WELM1 - 8419317 - Wells, ME 20 mi40 min NW 2.9 G 2.9 57°F 56°F1023.8 hPa
WEXM1 - Wells Reserve, ME 21 mi58 min NNE 1 55°F 47°F
44098 - Jeffrey's Ledge, NH (160) 37 mi52 min 58°F2 ft
44029 - Buoy A0102 - Mass. Bay/Stellwagen 40 mi114 min S 5.8 G 5.8 62°F 60°F1 ft1023 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 45 mi68 min SSW 7.8 G 9.7 58°F 55°F2 ft1023.3 hPa (+1.2)52°F
CASM1 - 8418150 - Portland, ME 49 mi40 min 61°F 56°F1023.5 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 mi2 hrsSW 310.00 miA Few Clouds64°F42°F46%1022.9 hPa
Rochester - Skyhaven Airport, NH16 mi67 minN 010.00 miFair61°F42°F50%1023.5 hPa
Sanford, Sanford Regional Airport, ME22 mi2 hrsN 010.00 miFair55°F46°F72%1023.4 hPa

Wind History from PSM (wind in knots)
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Last 24hrS4S7S7S5SW7SW7SW9SW6W4W7W5W8CalmW7W6W7W7W9W7W7W5W4SW3SW5
1 day agoNW10NW8NW9NW6NW5NW5NW7NW7W3W5CalmCalmW3----W3NW3W5W7S8SW6SW7S5S6
2 days agoSW9SW11
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Tide / Current Tables for Atlantic Heights, Piscataqua River, New Hampshire
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Atlantic Heights
Click for Map
Wed -- 05:04 AM EDT     -0.26 feet Low Tide
Wed -- 05:33 AM EDT     Moonrise
Wed -- 07:00 AM EDT     Sunrise
Wed -- 11:29 AM EDT     8.41 feet High Tide
Wed -- 05:29 PM EDT     -0.31 feet Low Tide
Wed -- 05:46 PM EDT     Moonset
Wed -- 05:54 PM EDT     Sunset
Wed -- 11:51 PM EDT     8.30 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.86.34.11.90.4-0.30.21.63.75.87.48.38.37.15.12.80.9-0.2-0.20.92.84.96.87.9

Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
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Portsmouth Harbor Entrance
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Wed -- 03:02 AM EDT     -2.00 knots Max Ebb
Wed -- 05:32 AM EDT     Moonrise
Wed -- 06:32 AM EDT     0.00 knots Slack
Wed -- 07:00 AM EDT     Sunrise
Wed -- 08:51 AM EDT     1.24 knots Max Flood
Wed -- 09:31 AM EDT     1.23 knots Min Flood
Wed -- 10:11 AM EDT     1.24 knots Max Flood
Wed -- 12:28 PM EDT     -0.00 knots Slack
Wed -- 03:35 PM EDT     -1.99 knots Max Ebb
Wed -- 05:45 PM EDT     Moonset
Wed -- 05:54 PM EDT     Sunset
Wed -- 07:00 PM EDT     0.00 knots Slack
Wed -- 09:08 PM EDT     1.14 knots Max Flood
Wed -- 10:19 PM EDT     1.11 knots Min Flood
Wed -- 10:22 PM EDT     1.11 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0-1.2-1.8-2-1.9-1.5-0.60.51.11.21.21.10.5-0.6-1.6-2-2-1.8-1.1-00.91.11.11.1

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 (19,4,5,8)
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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.