Friday, October18, 2019 L-36.com


Marine Weather and Tides
Portsmouth, NH

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:58AMSunset 5:57PM Friday October 18, 2019 7:20 PM EDT (23:20 UTC) Moonrise 9:04PMMoonset 11:36AM Illumination 73% Phase: Waning Gibbous; Moon at 20 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- 715 Pm Edt Fri Oct 18 2019
.small craft advisory in effect until 6 am edt Saturday...
Tonight..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Sat..NW winds 10 to 15 kt with gusts up to 25 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 3 ft in the morning, then 1 foot or less.
Sat night..NW winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less.
Sun..E winds around 5 kt, becoming se in the afternoon. Seas 1 foot or less.
Sun night..SE winds around 5 kt. Seas 1 foot or less.
Mon..NE winds 5 to 10 kt. Seas 1 foot or less.
Mon night..E winds 5 to 10 kt, becoming 5 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft.
Tue..E winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft.
Tue night..S winds 10 to 20 kt with gusts up to 25 kt. Seas 5 to 8 ft. Showers likely.
Wed..S winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 7 ft. A chance of showers.
Wed night..W winds 10 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft.
ANZ100 715 Pm Edt Fri Oct 18 2019
Synopsis for stonington me to merrimack river ma out to 25 nm.. Strong low pressure will gradually exit into the maritimes through Saturday. High pressure will build in for the second half of the weekend and early next week. The next storm system will cross the waters Tuesday into Wednesday. &&


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 181855
afdgyx
area forecast discussion
national weather service gray me
255 pm edt Fri oct 18 2019

Synopsis
A storm system over the maritimes will gradually weaken and exit
the region tonight. Gusty winds behind this system will subside
tonight. High pressure follows this system for the weekend into
early next week. A frontal system will move across the region
around Tuesday or Wednesday. High pressure builds in for the end
of next week.

Near term through tonight
At 18z a 990 millibar low was centered vicinity of the gaspe
peninsula. Weak impulses and associated surface troughs continue
to pivot around this system today producing clouds along with a
few showers mainly over northern and eastern sections. Gusty
winds and cool temperatures are making for a chilly fall day.

Clouds should begin to thin out this evening following passage
of a weak impulse and with the loss of daytime heating. We'll
see some lingering upslope clouds and rain or snow showers
across the higher terrain with the remainder of the area
becoming mostly clear. Lows tonight will be in the 30s with a
few 40 degree temperatures along the coast and in southeast new
hampshire.

Short term Saturday through Saturday night
On Saturday... The storm system over the maritimes continues to
slowly pull away. We'll see some leftover upslope clouds across
the mountains with mainly sunny skies elsewhere. Once again a
northwest breeze but not as windy as today. Highs will range
from the upper 40s along the international border to the 50s
elsewhere. Saturday night will see clear skies and winds
becoming light as high pressure finally builds east into the
region. Temperatures will respond accordingly to the
radiational cooling with lows in the 20s to lower 30s with some late
night valley stratus and fog likely.

Long term Sunday through Thursday
500 mb pattern across noam and surrounding oceans will tend to
remain fairly amplified with potential blocking sitting up
across N atlantic greenland region toward the end of next week.

Before that will initially see narrow but high amplitude ridge
setting up over the NE CONUS and into ERN canada, which should
for allow for a dry, and seasonably mild period Sunday into
Monday. Deepening trough to our west will slowly approach and
rotate NE across the area mid week, which will bring a chance of
some rain showers. Models indicating potential for narrow
ridging to develop again behind this system late in the week.

For the most part, 850 mb temps remain near to above normal.

Sunday and Monday are expected to be decent days with sfc high
holding over the region as remnants of TC nestor pass well S of
new england. Some cirrus from this system possible but otherwise
should be dry and at least partly sunny with highs both days in
the 50s to around 60 in S nh and on the coast. Given the
location of the sfc high, went below guidance a bit for lows
sun night, as we should see a decent set up for rad cooling.

Only issue will be possible clouds associated with nestor. Still
lows in the N should be 30-35, ranging to the upper 30s and low
40s in the s.

Fairly large and deepening 500 mb trough over central noam will
slowly shift NE Tue and wed, with main sfc low tracking to our
west, and potential for secondary low formation over the NE as
energy rotates around base of the trough. This will bring a
round of rain to the region in the tue-wed timeframe, although
exact timing and QPF still uncertain at this point. In the wake
of this system high pressure will build in from the SW for the
latter part of next week.

Aviation 18z Friday through Wednesday
Short term through Saturday night ...VFR with pockets of MVFR
across the mtns with sct -shra -shsn. NW surface wind gusting up
to 25 kt through 22z today before subsiding. BecomingVFR
throughout aft 22z Saturday. LCL ifr psb btw 08 and 12z Sunday
in valley stratus and fog.

Long term... MainlyVFR Sun through Mon night. Flight
restrictions possible at times tue-wed as frontal system moves
through.

Marine
Short term through Saturday night ... Nw flow and marginal sca
conditions continue. The short range models continue to show
another surge of wind late today early evening with a passing
surface trough so the SCA will remain in place and be extended
through late tonight. Thereafter... Bays and outer waters should
see conditions below sca.

Long term... May need SCA Tue into Wed as S flow ahead of
deepening low to our west picks up and pushes seas up as well.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... Small craft advisory until 6 am edt Saturday for
anz150>154.

Near term... Schwibs
short term... Schwibs
long term... Cempa


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BGXN3 - Great Bay Reserve, NH 3 mi95 min W 6 52°F 1008 hPa38°F
IOSN3 - Isle of Shoals, NH 11 mi80 min WNW 22 G 25 53°F 1007.4 hPa (+2.8)38°F
44073 13 mi136 min WNW 21 G 27 55°F
44030 - Buoy B0102 - Western Maine Shelf 19 mi76 min WNW 21 G 25 52°F 55°F3 ft1007.4 hPa
WELM1 - 8419317 - Wells, ME 20 mi50 min NW 9.9 G 16 50°F 55°F1008.5 hPa
WEXM1 - Wells Reserve, ME 21 mi80 min WNW 7 51°F 38°F
44098 - Jeffrey's Ledge, NH (160) 37 mi42 min 55°F6 ft
44029 - Buoy A0102 - Mass. Bay/Stellwagen 40 mi76 min WNW 18 G 21 55°F 56°F2 ft1007.6 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 45 mi90 min NW 19 G 25 53°F 54°F3 ft1006.2 hPa (+3.4)39°F
CASM1 - 8418150 - Portland, ME 49 mi56 min 51°F 55°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 mi24 minWNW 810.00 miA Few Clouds49°F35°F59%1009.1 hPa
Rochester - Skyhaven Airport, NH16 mi29 minNW 7 G 1510.00 miFair49°F35°F59%1008.8 hPa
Sanford, Sanford Regional Airport, ME22 mi24 minWNW 810.00 miFair47°F37°F71%1009.3 hPa

Link to 5 minute data for KPSM

Wind History from PSM (wind in knots)
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2 days agoS3SE4S3CalmCalmCalmCalmCalmCalmNW4CalmCalmCalm----SE9SE10
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Tide / Current Tables for Atlantic Heights, Piscataqua River, New Hampshire
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Atlantic Heights
Click for Map
Fri -- 02:59 AM EDT     7.23 feet High Tide
Fri -- 07:00 AM EDT     Sunrise
Fri -- 08:46 AM EDT     0.86 feet Low Tide
Fri -- 11:35 AM EDT     Moonset
Fri -- 03:06 PM EDT     7.92 feet High Tide
Fri -- 05:55 PM EDT     Sunset
Fri -- 09:04 PM EDT     Moonrise
Fri -- 09:20 PM EDT     0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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45.76.87.26.85.74.12.41.20.91.52.74.46.17.47.97.66.44.72.81.10.30.41.3

Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
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Portsmouth Harbor Entrance
Click for Map
Fri -- 12:40 AM EDT     1.17 knots Max Flood
Fri -- 03:40 AM EDT     -0.00 knots Slack
Fri -- 06:59 AM EDT     Sunrise
Fri -- 07:05 AM EDT     -1.71 knots Max Ebb
Fri -- 10:42 AM EDT     0.00 knots Slack
Fri -- 11:35 AM EDT     Moonset
Fri -- 12:59 PM EDT     1.34 knots Max Flood
Fri -- 03:52 PM EDT     -0.00 knots Slack
Fri -- 05:55 PM EDT     Sunset
Fri -- 07:32 PM EDT     -1.93 knots Max Ebb
Fri -- 09:03 PM EDT     Moonrise
Fri -- 11:28 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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11.10.70.2-0.1-0.6-1.3-1.7-1.5-0.9-0.40.211.310.4-0-0.5-1.2-1.8-1.9-1.4-0.9-0.3

Weather Map
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wmap_A
GEOS 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 (19,4,5,8)
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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.