Thursday, November15, 2018 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 4:20PM Thursday November 15, 2018 5:42 PM EST (22:42 UTC) Moonrise 1:55PMMoonset 12:00AM Illumination 54% Phase: First Quarter Moon; Moon at 8 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
    EDIT      (on/off)   Help
ANZ154 Coastal Waters From Cape Elizabeth, Me To Merrimack River, Ma Out 25 Nm- 254 Pm Est Thu Nov 15 2018
.gale warning in effect from 1 am est Friday through Friday afternoon...
Tonight..SE winds 5 to 15 kt with gusts up to 25 kt, becoming E 15 to 25 kt with gusts up to 40 kt after midnight. Seas 2 to 4 ft, building to 6 to 9 ft after midnight. Rain or snow likely this evening, then rain or snow after midnight.
Fri..NE winds 25 to 35 kt, becoming nw 30 to 40 kt in the afternoon. Seas 12 to 17 ft. Rain, mainly in the morning.
Fri night..W winds 15 to 25 kt with gusts up to 35 kt. Seas 8 to 11 ft, subsiding to 5 to 8 ft after midnight.
Sat..W winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft, subsiding to 2 to 4 ft in the afternoon.
Sat night..W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Sun..NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft.
Sun night..SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Rain and snow likely. Vsby 1 to 3 nm.
Mon..W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. Vsby 1 to 3 nm.
Mon night..NW winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Tue..NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Tue night..NW winds 10 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of snow showers. Vsby 1 to 3 nm.
ANZ100 254 Pm Est Thu Nov 15 2018
Synopsis for stonington me to merrimack river ma out to 25 nm.. A coastal low pressure system will move across cape cod later tonight and then northeast rapidly through the gulf of maine Friday. High pressure then moves across the waters over the weekend before another low pressure system potentially affects the waters early next week. &&


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


Area Discussion for - Gray/Portland, ME
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kgyx 152017
afdgyx
area forecast discussion
national weather service gray me
317 pm est Thu nov 15 2018

Synopsis
A coastal storm will arrive tonight into Friday bringing
mainly snowfall to maine and new hampshire. An upper level
disturbance will cross the region Saturday. Canadian high
pressure builds into the region Sunday before a fast moving area
of low pressure develops over the region Sunday night. An
arctic front will cross the region late Monday, followed by
high pressure building into the region through midweek.

Near term through tonight
A very deep arctic air mass in place with a very dry column of
air in place, this will play an important role in the upcoming forecast.

Initial shot of stg WAA overunning aloft tonight will bring
with it over a half inch to .75 inches of QPF in the form of
snow due to the stg baroclinic zone in place and strong
evaporational cooling of the columns with also a deep arctic air
mass in place. Expecting a large swath of 5-8 inches over most
areas so winter storm warnings will continue. A break in the
action occurs late tonight and toward morning once the initial
shot of WAA ends with a brief dry slot.

Lowered overnight temps due to the strong cold air damming
overnight. Late tonight some warm air aloft and at the sfc may
make it into extreme southeast nh lowering amounts over the
seacoast area thus only winter wx advisories for that area.

Euro still the preferred model of choice with higher QPF and
colder. GFS has considerably lower qpf, meanwhile NAM the warmer
model trying to simply bring warm air inland through the arctic
dome which is very unlikely.

Of interest will be where some heavier bands of snowfall occur
that may exceed the snowfall forecast amounts with initial shot
of the WAA pattern over southern and coastal which should last
4-6 hours tonight before becoming light late. Coastal front will
come into play after midnight aiding in additional lift in a
20-30 mile area west of its location.

Northern areas will be on northern fringe of system and may
have a tough time reaching warning criteria but higher ratios
(fluff factor) may play a role.

Short term Friday through Friday night
Will be using the euro track of the low and mid level low for
fri. This will bring another shot of wraparound snow in the
morning of maybe a few additional inches. The system races
northeast and by afternoon the pcpn should come to an end with
clearing in the mid afternoon. Northwest downsloping winds will
increase and become gusty in the wake of the departing storm in
the afternoon.

Heavily weighted temps off the euro model but with some assist
from the other blended models
fri night another shot of cold air on a westerly flow. Some
minor S wves may trickle through the west flow aloft causing
some scattered snow showers.

Long term Saturday through Thursday
A gradual warming trend is expected for the start of the upcoming
weekend, however temperatures will still average near or below
normal. A break between weather systems will occur for much of
the day Saturday prior to the passage of yet another arctic
frontal approach late in the day. This renewed shot of cold air
will trigger scattered snow showers. H8 temperatures between
-10c and -14c will allow for temperatures to drop into the teens to
20s by Sunday morning.

High pressure will enter the region within a very fast flow as a
broad scale upper level low approaches from the west. This upper
level feature will trigger the development of a wave of low
pressure Sunday night into early Monday morning. Models have
been trending towards higher pops and the potential for light
accumulations of snowfall before it the system exits to our east
Monday afternoon. In its wake, all models drive a strong arctic
front through the region Monday evening. Strong cold air
advection in the fast moving cyclonic flow aloft will allow for
snow showers to break out across the high terrain. Expect
scattered snow showers as well, which may reach all the way to
the coastline. Very cold conditions will follow for Tuesday and
Tuesday night with overnight lows once again near zero over
northern areas.

More quiet conditions expected for the rest of the midweek
period. A large ridge of high pressure will move off the coast
late in the week. This will set up the potential for very light
overunning precipitation.

Aviation 19z Thursday through Tuesday
Short term...VFR conds the rest of the aftn will be lowering to
ifr lifr in developing snow across southern areas 00-03z
then rapidly spreading north over the rest of the area by 07z.

Conditions will slowly improve toVFR late Fri morning.VFR
conditions in the afternoon into Fri night except in the mountains
where MVFR conditions may persist. Gusty northwest winds will
develop Fri afternoon into the evening as the storms exits into
the maritimes.

Long term... Conditions lowering to ifr in snow Sunday night.

Scattered snow squalls with abruptly changing winds will likely
cross the region late Monday and Monday evening.

Marine
Short term... Gale warning begin late tonight and continue through
Friday.

Long term... Westerly winds may reach scas on Saturday. A brief
period of strong winds, possibly briefly meeting gale force over
the outer water may occur with the passage of scattered snow
squalls late Monday and Monday evening.

Gyx watches warnings advisories
Me... Winter storm warning from 7 pm this evening to 1 pm est Friday
for mez018-023.

Winter storm warning from 1 am to 4 pm est Friday for
mez007>009-012>014-019>022-024>028.

Nh... Winter storm warning from 7 pm this evening to 1 pm est Friday
for nhz005>013-015.

Winter storm warning from 1 am to 4 pm est Friday for
nhz001>004.

Winter weather advisory from 7 pm this evening to 7 am est
Friday for nhz014.

Marine... Gale warning from 1 am to 4 pm est Friday for anz150>154.

Near term... Marine
short term... Marine
long term... Cannon


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BGXN3 - Great Bay Reserve, NH 3 mi58 min NE 1.9 29°F 16°F
IOSN3 - Isle of Shoals, NH 11 mi43 min ENE 8 G 9.9 31°F 1030.2 hPa (-3.4)21°F
44030 - Buoy B0102 - Western Maine Shelf 19 mi99 min SE 1.9 G 5.8 31°F 49°F1 ft1032.1 hPa
WELM1 - 8419317 - Wells, ME 20 mi43 min N 4.1 G 5.1 29°F 47°F1031.6 hPa (-2.3)
WEXM1 - Wells Reserve, ME 21 mi58 min N 1.9 28°F 15°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 40 mi99 min E 9.7 G 14 34°F 50°F2 ft1030.7 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 45 mi53 min Calm G 3.9 30°F 47°F1 ft1031.6 hPa (-2.5)14°F
CASM1 - 8418150 - Portland, ME 49 mi43 min 34°F 47°F1031.4 hPa (-2.3)

Wind History for Wells, ME
(wind in knots)    EDIT      (on/off)   Help
6
PM
-12
PM
-12
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
Last
24hr
NW11
G19
NW7
G13
NW7
G11
NW4
G11
N4
G7
--
SW3
N2
N2
G5
NW4
W3
G6
NW3
N4
W2
--
S3
S4
SE3
SW3
S4
SE3
N4
1 day
ago
NW5
W7
G11
NW13
G24
NW13
G26
NW16
G25
NW21
G29
NW14
G23
NW9
G15
W4
G8
W8
G12
W8
G13
NW13
G24
NW14
G20
NW15
G33
NW16
G28
NW16
G32
NW13
G26
NW22
G29
N18
G25
NW17
G26
NW14
G22
2 days
ago
N2
NW1
N1
--
N2
--
N3
N2
S16
G21
SW4
SE12
SE10
G13
SE17
G21
SE14
G20
SE10
G15
S16
SW16
G20
SW8
G11
N15
G19
N13
G17
N13
G17
N13
G17
NW8
G13

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH3 mi47 minN 08.00 miOvercast29°F14°F55%1030.8 hPa
Rochester - Skyhaven Airport, NH16 mi52 minN 010.00 miFair27°F8°F45%1030.7 hPa
Sanford, Sanford Regional Airport, ME22 mi47 minN 010.00 miFair27°F14°F58%1031.9 hPa

Wind History from PSM (wind in knots)
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
Last 24hrNW16
G25
NW16
G23
NW16NW13
G23
W10W9W8NW4W5W7W6W8W5NW5NW6CalmCalmCalmCalmCalmCalmE3E4Calm
1 day agoW11W10
G17
W9
G17
W9
G16
W7NW12
G19
W20
G29
W11
G24
W21
G30
W13W6W8W7W10W11W14
G20
W16
G27
W23
G34
NW21
G26
NW17
G28
W17
G29
NW21
G27
NW20
G28
NW18
G22
2 days agoS5S3CalmS5CalmCalmCalmCalmCalmCalmSE3SE11SE10SE13
G22
E12SE13SE12S12SE6N5NW18W10NW8W7

Tide / Current Tables for Atlantic Heights, Piscataqua River, New Hampshire
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Atlantic Heights
Click for Map
Thu -- 05:06 AM EST     6.58 feet High Tide
Thu -- 06:35 AM EST     Sunrise
Thu -- 09:54 AM EST     First Quarter
Thu -- 10:52 AM EST     1.67 feet Low Tide
Thu -- 12:54 PM EST     Moonrise
Thu -- 04:19 PM EST     Sunset
Thu -- 05:12 PM EST     6.97 feet High Tide
Thu -- 11:19 PM EST     Moonset
Thu -- 11:30 PM EST     1.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.52.645.36.26.66.35.44.12.81.91.722.94.25.66.576.85.94.631.81.1

Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
   EDIT      (on/off)   Help   One Week of Data
Portsmouth Harbor Entrance
Click for Map
Thu -- 12:26 AM EST     0.00 knots Slack
Thu -- 02:08 AM EST     0.84 knots Max Flood
Thu -- 06:12 AM EST     -0.00 knots Slack
Thu -- 06:35 AM EST     Sunrise
Thu -- 08:40 AM EST     -1.30 knots Max Ebb
Thu -- 09:54 AM EST     First Quarter
Thu -- 12:43 PM EST     0.00 knots Slack
Thu -- 12:54 PM EST     Moonrise
Thu -- 02:25 PM EST     0.81 knots Max Flood
Thu -- 04:18 PM EST     Sunset
Thu -- 06:09 PM EST     -0.00 knots Slack
Thu -- 09:05 PM EST     -1.59 knots Max Ebb
Thu -- 11:19 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
-0.40.40.80.70.50.40.1-0.6-1.2-1.3-1.1-0.9-0.50.20.80.70.40.20.1-0.5-1.3-1.6-1.5-1.2

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Gray/Portland, ME (17,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Portland, ME
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.