Marine Weather and Tides
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.
|Sunrise 7:57AM||Sunset 8:16PM||Monday March 19, 2018 7:42 PM AKDT (03:42 UTC)||Moonrise 7:25AM||Moonset 9:26PM||Illumination 11%|
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|PKZ140 Cook Inlet North Of Kalgin Island- 319 Pm Akdt Mon Mar 19 2018 |
Tonight..SW wind 15 kt. Seas in ice free waters 3 ft.
Tue..W wind 10 kt. Seas in ice free waters 2 ft.
Tue night..NW wind 10 kt. Seas in ice free waters 2 ft.
Wed and Wed night..N wind 15 kt. Seas in ice free waters 3 ft.
Thu..N wind 15 kt. Seas in ice free waters 3 ft.
Fri through Sat..N wind 10 kt. Seas in ice free waters 2 ft.
7 Day Forecast for Marine Location Near Salamatof, AKHourly EDIT Help
Area Discussion for -  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxak68 pafc 200012|
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
412 pm akdt Mon mar 19 2018
Analysis and upper levels
An upper level short-wave trough is tracking eastward across
southcentral this morning, with rain and snow ahead of it. Low
level cold air advection is changing precipitation to mostly snow
on the back edge, with precipitation then ending from west to
east. The cold advection is also leading to strong gusty winds,
especially across the western gulf and western prince william
sound areas. A much weaker short-wave is crossing the northern
bering sea and headed for the kuskokwim delta and kuskokwim
valley, with snow showers and gusty winds headed that way.
Conditions are quite benign across the heart of the bering sea and
the aleutian chain as an upper level ridge amplifies overhead,
out ahead of a storm system near the kamchatka peninsula.
Models are in excellent agreement with large scale features and
overall forecast confidence is high. The main forecast challenge
will be details of winds across southcentral and the gulf the next
few days as various features move through, resulting in multiple
peaks and valleys in wind speeds.
Panc... Conditions will remain safelyVFR through the TAF period.
The forecast challenge for the next 24 hours will be timing of
stronger winds, with some gusty northwest flow expected this
afternoon then again beginning Tuesday afternoon.
Short term forecast southcentral alaska (days 1 and 2)
The main weather concern through mid week is strong offshore flow
which is already developing as a trough sets up along the eastern
gulf of alaska.
The surface low that brought snow and rain to the region today
exits to the east gulf later tonight with numerous snow showers
continuing across the copper river valley through Tuesday
morning. A slightly cooler air mass advects from the northwest
as the trough settles in the eastern gulf. A few showers remain
possible through Tuesday as a strong upper level disturbance
quickly moves from the west coast to gulf. A pattern shift
Tuesday night brings stronger wind gusts for channeled terrain
along the coast as the pressure gradient is squeezed between the
gulf low and a building ridge surface ridge over the central
interior. The strongest winds are expected on Wednesday, however
the upper level pattern supports prolonged gusts for the northeast
gulf through early Thursday. The matanuska valley can also
expect gusty flow to develop on Wednesday as the surface ridge
shifts toward the alcan border.
Short term forecast southwest alaska (days 1 and 2)
A trough currently moving through the southwest mainland will be
along the alaska range tonight then continue east. Following this|
tough another upper level disturbance will move through overnight
increasing the chances of snow showers over the kuskokwim delta
into the middle kuskokwim valley. Moisture trailing this trough
will continue to advect across the southwest mainland through
Tuesday afternoon in the west northwest flow. This will help to
keep a threat of snow showers across the region, especially along
the alaska range and aleutian mountains. Additionally, gusty
northwest wind through channeled terrain can be expected along the
aleutian mountains. An upper level ridge will build in behind
these troughs into the eastern bering sea Tuesday helping to dry
conditions Tuesday and Wednesday.
Short term forecast bering sea aleutians (days 1 and 2)
A large flat ridge of high pressure is in place across the
aleutians and central bering sea and will gradually slide east
overnight as another strong low moves into the western bering sea
and kamchatka peninsula Tuesday. A strong front will push into
the western aleutians Tuesday bringing gale to minimum storm force
wind with it. This front will slowly push east as the ridge breaks
down through Wednesday, crossing the eastern aleutians Wednesday
afternoon. This is a distinct cold front that will likely have
very gusty winds along the front and immediately behind it as well
as showery precipitation. Rain in advance of the front will
rapidly change over the snow and snow showers as the front passes
Long term forecast (days 3 through 7)
On Thursday night a large upper low will be situated over the
bering sea, aleutians, and the west coast of alaska. There will be
a full latitude blocking high along 155 degrees west longitude,
with another upper low centered to the west of vancouver island.
This pattern will begin to break down by the weekend, but exactly
how this occurs is not well agreed upon by the models. The 00z
ecmwf supports a compact upper low which will peel off from mean
trough near the yukon territory that would undercut the ridge and
form a rex block. Meanwhile, the past few runs of the GFS suggest
maintaining more of an omega block signature as downstream energy
does not show any retrogression back toward mainland alaska.
Underneath this blocking regime, a chain of shortwaves appear
primed to sweep across the aleutians into the gulf of alaska
during much of the forecast. This will be a fairly active pattern
for the aleutians and southern alaska. Due to the model
differences, timing of any individual systems is problematic.
Therefore the wpc forecast relies heavily on the ensemble means,
with the strongest weighting towards the 00z ECMWF mean.
Afc watches warnings advisories
Marine... Gales 119-121 127 128 130-132 178 351 352 411
synopsis and model discussion... Seb
southcentral alaska... Kh
southwest alaska bering sea aleutians... Sa
long term... Bl
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|DRFA2 - Drift River Terminal, AK||1 mi||42 min||WNW 11 G 12||36°F||1024.7 hPa (+1.1)||10°F|
|NKTA2 - 9455760 - Nikiski, AK||40 mi||42 min||WNW 21 G 24||35°F||31°F||1023.3 hPa (+0.5)|
|HMRA2 - Kachemak Bay Reserve, AK||77 mi||72 min||WNW 16||-40°F||1024 hPa|
Wind History for Nikiski, AK(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Kenai, Kenai Municipal Airport, AK||47 mi||49 min||W 14 G 21||10.00 mi||Fair||36°F||16°F||44%||1023.6 hPa|
Wind History from AEN (wind in knots)
|1 day ago||Calm||S||SW||S||S||S||SE||SE||SE||S||S||SE||S||S||S||S||S||SW||S||SW||S||S||S||S|
|2 days ago||S||S||Calm||NE||N||N||N||N||N||Calm||N||Calm||N||NE||NE||NE||Calm||Calm||Calm||Calm||Calm||SW||W||Calm|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Drift River Terminal |
Click for Map
Mon -- 12:18 AM AKDT -1.36 feet Low Tide
Mon -- 06:08 AM AKDT 20.33 feet High Tide
Mon -- 08:12 AM AKDT Sunrise
Mon -- 09:24 AM AKDT Moonrise
Mon -- 12:40 PM AKDT -1.24 feet Low Tide
Mon -- 06:26 PM AKDT 19.76 feet High Tide
Mon -- 08:21 PM AKDT Sunset
Mon -- 11:26 PM AKDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|East Foreland |
Click for Map
Mon -- 01:12 AM AKDT -0.65 feet Low Tide
Mon -- 07:06 AM AKDT 23.13 feet High Tide
Mon -- 08:09 AM AKDT Sunrise
Mon -- 09:21 AM AKDT Moonrise
Mon -- 01:34 PM AKDT -0.55 feet Low Tide
Mon -- 07:24 PM AKDT 22.57 feet High Tide
Mon -- 08:18 PM AKDT Sunset
Mon -- 11:23 PM AKDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
GOES Local Image of Alaska 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
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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.