Marine Weather and Tides
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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|Sunrise 6:29AM||Sunset 9:34PM||Saturday August 24, 2019 9:10 PM AKDT (05:10 UTC)||Moonrise 10:38PM||Moonset 3:48PM||Illumination 28%|
7 Day Forecast for Marine Location Near Anchor Point, AKHourly EDIT Help
Area Discussion for -  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxak68 pafc 250039|
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
439 pm akdt Sat aug 24 2019
Analysis and upper levels
The arctic jet and its associated trough are moving east with
little fanfare. The main event remains well to the south in the
form of the pacific jet which is well offshore and out of reach
for any sensible help for the mainlands ongoing drought and fire
An upper-level low over the southern bering west of bristol bay is
showing signs of joining the pacific jet as it drifts toward the
At the surface, a weak low sits just outside of prince william
sound and a stationary boundary is falling apart over the yukon
valley. A trough extends out from the kuskokwim delta to just
south of the pribilof islands directly under the bering sea
upper- level low. The ragged circulation was raining over cold bay
with spotty convection showing up on goes17 from akutan to false
pass. Most other regions were mostly sunny to start with fair
weather cumulus developing over higher terrain by midday.
Satellite imagery shows smoke from the swan lake fire now being
directed south and east into the kenai mountains and seward. A
dense smoke advisory continues for the kenai peninsula. A flood
advisory for the snow glacier dammed lake release also remains in
The models remain in agreement through Monday with the main highs
and lows surrounding the region. The main forecast challenges will
surround the development of southerly winds through turnagain arm
and into the susitna valley as the surface low drifts south along
the kenai fjords. Concerns surround the movement and density of
any wildfire smoke for anchorage and valley locations.
Little change from persistence is seen with high pressure
hovering near the aleutians.
Panc...VFR conditions and light winds will persist through
tonight. Southerly winds will return Sunday and smoke will likely
lower visibility in the aerodrome as soon as that commences.
Turnagain arm winds are expected to develop in the afternoon.
Short term forecast southcentral alaska (days 1 through 3)
The shortwave that brought gusty gaps winds to the area will
continue to push off to the east tonight which will work to
diminish winds through the night. Lingering showers over the
mountains will also diminish as the shortwave leaves. With light
winds over the kenai peninsula expected overnight smoke will
continue to be an issue for interior areas of the peninsula. Dense
smoke advisories have been issued for these areas.
On Sunday the flow will switch to the south with turnagain arm winds
ramping up as well. The up inlet gradient will increase in the
afternoon helping to bend in turnagain arm winds over western
anchorage. The overall southerly winds will also help to bring
smoke back over anchorage and the matanuska and susitna valleys,
with the worst conditions expected Sunday night into Monday
morning. The winds will taper off Sunday night as a low that will
form in the western gulf tracks to the east changing the pressure
gradient across southcentral alaska. Dry conditions with light
winds will last into Tuesday.
Low lying areas around southcentral alaska are expected to see dry|
conditions into Tuesday with only a slight chance of rain Sunday
afternoon. There is also a chance to see isolated wet
thunderstorms over the wrangell mountains this evening. Winds will
stay light tonight but become southerly and increase in speed on
Sunday. The strongest winds will be through turnagain arm and are
expected to bend over western anchorage in the afternoon. The
winds will then diminish again Sunday night and remain light
through Tuesday. Temperatures for the most part will stay around
normals with Sunday being slightly cooler due to increased cloud
Short term forecast southwest alaska (through Tuesday)
Overnight into Sunday, the marine layer from the bering sea will
try to make a push into the kuskokwim delta, bringing cloudier and
moister conditions. About the same time, a weak disturbance will
drop in from the bering strait region, but likely won't squeeze
out any precipitation. The best chance for that happening would be
along the aleutian alaska range on Sunday afternoon. Otherwise,
fairly light winds will dominate with fair weather clouds popping
during the afternoon. Radiation cooling during the overnight hours
will facilitate patchy fog development, especially in river
valleys along the coast.
Short term forecast bering sea aleutians (through Tuesday)
An upper level low pressure system spinning over the alaska
peninsula will bring numerous showers to the area. The cold
temperatures aloft associated with the system could bring an
isolated thunderstorm overnight as well. Otherwise quiet
conditions will remain until Monday when a front move into the
western bering sea, slowly progressing eastward through mid-week.
Marine (days 3 through 5: Tuesday through Thursday)
There is the possibility of a gale force low moving toward the
central aleutians Wednesday and Thursday. Currently, model
solutions still differ on this low, thus lower confidence in
gales moving into the central aleutians and central to eastern bering
sea Wednesday and Thursday.
Long term forecast (days 4 through 7: Wednesday through Saturday)
The upper level pattern beginning Wednesday has a broad trough
across the bering sea with zonal flow across the top of the upper
level ridge. The trend into the weekend is for the trough to dig
south to the alaska peninsula while the upper ridge amplifies in
the eastern gulf of alaska into the mainland. There is significant
disagreement in the model solutions with regard to how far south
and east the trough digs and whether a strong upper closed low
will be south of the gulf of alaska or this remains an upper
trough. Current thinking is to maintain the upper trough solution
as opposed to a closed upper low moving into the gulf of alaska.
Bottom line is the ensemble or compromise solutions support cool
moist weather across southwest alaska while south central alaska
remains in the drier flow, although temperatures should be cooler
and cloud cover will be increasing. Confidence in the forecast
beyond Thursday is low.
Afc watches warnings advisories
Public... Dense smoke advisory: 121 125.
Flood advisory: 121 125.
Fire weather... None.
Synopsis and model discussion... Ds
southcentral alaska... Dk
southwest alaska bering sea aleutians... Mtl
marine long term... Sa
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|
|APXA2||1 mi||86 min||WSW 1.9||59°F||1009 hPa||52°F|
|46108 - Central Cook Inlet - 175||12 mi||41 min||54°F||2 ft|
|OVIA2 - 9455500 - Seldovia, AK||24 mi||59 min||51°F||1008.7 hPa|
|HMSA2||25 mi||29 min||SW 6 G 11||57°F||1008.4 hPa||49°F|
|HMRA2 - Kachemak Bay Reserve, AK||26 mi||101 min||W 8.9||58°F||1007 hPa||50°F|
|FILA2 - Flat Island Light, AK||31 mi||41 min||SSW 4.1 G 5.1||59°F||1009.2 hPa||44°F|
Wind History for Nikiski, AK(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Homer, Homer Airport, AK||20 mi||3.3 hrs||WSW 14||10.00 mi||Fair||59°F||50°F||72%||1007.8 hPa|
|Seldovia, Seldovia Airport, AK||24 mi||3.3 hrs||N 0||10.00 mi||Fair||60°F||48°F||67%||1008.3 hPa|
Link to 5 minute data for PAHO
Wind History from AHO (wind in knots)
|1 day ago||W||SW||Calm||Calm||NE||NE||NE||NE||NE||E||NE||E||E||E||SE||SW||SW||W||SW||W||SW|
|2 days ago||SW||Calm||Calm||NE||Calm||Calm||NE||NE||N||N||E||E||E||Calm||S||SW||SW||SW||SW||SW||SW||SW||SW||W |
EDIT Weekend mode (on/off) (on/off)  Help One Week of Data
EDIT (on/off)  Help One Week of Data
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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