Marine Weather and Tides
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 6:00AM||Sunset 6:36PM||Friday April 26, 2019 12:49 PM ChST (02:49 UTC)||Moonrise 12:50AM||Moonset 8:50AM||Illumination 59%|
7 Day Forecast for Marine Location Near Attu Station, AKHourly EDIT Help
Area Discussion for -  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxak68 pafc 260020|
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
420 pm akdt Thu apr 25 2019
Analysis and upper levels
An area of low pressure continues to weaken over the gulf of
alaska. The associated occluded front extends over the north gulf
coast bringing showers to the prince william sound area. Colder
air on the backside of the low and offshore flow have allowed for
continued clear conditions over southwest alaska. Further west, a
ridge of high pressure is centered over the bering with plenty of
low level marine stratus in place throughout most of the bering in
response to the subsidence from the high. Meanwhile, a warm front
associated with a kamchatka low has begun to approach the western
Models remain in generally good agreement with the departure of
the gulf low toward the southeast by Fri evening. Models continue
to struggle with the exact location and strength of a complex
north pacific low moving into the southwestern gulf by Sunday
Panc...VFR conditions and light winds will persist.
Short term forecast southcentral alaska (days 1 and 2)
A low in the gulf of alaska this afternoon will begin to pull away
from the area to the southeast overnight. This will allow high
pressure to build into southcentral alaska tomorrow and the high
pressure should persist through the weekend. This will bring in
clearer skies, warmer temperatures and some gusty northerly winds
mainly through channeled terrain.
Short term forecast southwest alaska (days 1 through 3)
A return of spring weather is expected for the early part of the
weekend with sunny skies and cool nights. By Sunday, a low
approaching from the south will bring a chance of showers to the
bristol bay area, but with warming temperatures aloft these are
expected to fall as rain.
Short term forecast bering sea aleutians (days 1 through 3)
High pressure continues to reign over the eastern bering, with
some lingering marine stratus, but wind and seas will be fairly
quiet through Sunday. Further west, a front approaches the western
aleutians, bringing gale force winds and rain. This front is
expected to progress gradually eastward through the weekend. By
Sunday, the gale force winds and higher seas will have spread
across the central bering. With southerly flow, temperatures are
expected to bring mostly rain with this front. South of the
aleutians, another low will skirt along the eastern aleutians
beginning tonight, then progressing eastward through Sunday. Rain
isn't expected to affect the southern side of the chain until
Friday afternoon, then moving to the south side of the alaska
peninsula for Saturday and Sunday.
Marine (days 3 through 5)
Beginning the extended marine period, the general storm track
will be over the western bering sea. This means gale force winds
will be relegated to west of the pribilof islands with general
e-se winds over the remainder of the bering sea and gulf of alaska
as weakening fronts lift north through Monday evening.
Thereafter, high pressure is going to assert its dominance over
the region with no major storms and weakening winds lowering seas
across the bering sea and gulf of ak Tue night through wed... And
possibly through the end of the week. Forecast confidence is
rather high given the fact the storm track will shift south under
the influence of overall high pressure.
Long term forecast (days Sunday evening through Thursday morning)
Upper levels: Sunday evening starts out with some model
differences with the canadian nh ECMWF going with a rex block(low
north gulf kodiak with ridge interior). On the other hand, the gfs
tends toward a high amplitude ridge over the eastern gulf,
troughing over western alaska ak pen, and a broad long wave over
the western bering. The can nh and ECMWF rex block transitions
toward a high amplitude ridge over the gulf eastern mainland with
a long wave trough generally over the bering sea aleutians on
Monday night. This general pattern looks like it should hold into
Surface: although models start out somewhat differently aloft the
surface patterns appear to be in somewhat fair agreement with a
moderately strong low entering the western bering sea and a north
moving front approaching the western gulf ak pen Sunday evening.
The mean upper pattern will support keeping the storm track
generally over the bering sea aleutians with relatively dry
conditions over the eastern mainland eastern gulf. Elsewhere, the
eastern positioning of the upper ridge will allow bouts of
moisture to impact much of southwest alaska through Thursday. How
much moisture gets into southcentral and the western gulf after
the front pushes north Sunday night and Monday is in question.
Expect for now at least clouds and chance pops for the western
gulf and southcentral through mid week. Precipitation will lean
toward rain over the gulf ak pen with a mix over southwest
alaska bering sea.
Afc watches warnings advisories
Marine... Gale warning 172 178.
Fire weather... None.
Synopsis and model discussion... Ko
southcentral alaska... Ez
southwest alaska bering sea aleutians... Lf
marine long term... Ja rc
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Shemya, Eareckson AFB, AK||49 mi||1.9 hrs||S 23 G 30||7.00 mi||Overcast and Windy||38°F||32°F||79%||1020.1 hPa|
Wind History from ASY (wind in knots)
|1 day ago||SE||E||E||E||SE||SE||E||SE||E||E||E||E||E||E||E||E||E|
|2 days ago||NW||NW||NW||NW||NW||NW||NW||NW||NW||N||NW||NW||NW||N||NW||N||Calm||W||N||Calm||E||SE||E||SE |
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GOES Local Image of 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.
Other links: Northern Pacific Contential US Full GOES-East
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