Gale Warning 340, NWS Anchorage, AK

080 
FZAK52 PAFC 241203
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
403 AM AKDT Mon Apr 24 2023

Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ199-250115-
403 AM AKDT Mon Apr 24 2023
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 1000 mb low 190 nm west of St. Paul Island moves to 75 nm north
of Nelson lagoon at 993 mb late Tue morning.


$$

PKZ750-250115-
Sitkinak to Castle Cape out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY TODAY...

.TODAY...NW wind 30 kt becoming SW 15 kt in the afternoon. Seas
6 ft subsiding to 3 ft in the afternoon. Freezing spray in the
morning.
.TONIGHT...SE wind 20 kt. Seas 4 ft. Widespread snow and rain
showers.
.TUE...S wind 20 kt. Seas 5 ft. Rain and widespread snow showers.
.TUE NIGHT...SW wind 20 kt. Seas 5 ft.
.WED...E wind 20 kt. Seas 6 ft.
.THU...SW wind 25 kt. Seas 6 ft.
.FRI...S wind 25 kt. Seas 5 ft.

$$

PKZ751-250115-
Sitkinak to Castle Cape from 15 to 100 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...NW wind 25 kt in the morning becoming W 15 kt. Seas 7 ft.
.TONIGHT...S wind 25 kt. Seas 7 ft. Widespread rain showers and
snow.
.TUE...SW wind 25 kt. Seas 9 ft.
.TUE NIGHT...SW wind 25 kt. Seas 10 ft.
.WED...SE wind 20 kt. Seas 9 ft.
.THU...SW wind 30 kt. Seas 12 ft.
.FRI...S wind 20 kt. Seas 9 ft.

$$

PKZ752-250115-
Castle Cape to Cape Tolstoi out to 15 NM-
403 AM AKDT Mon Apr 24 2023

.TODAY...NW wind 15 kt in the morning becoming variable 10 kt.
Seas 2 ft. Snow.
.TONIGHT...S wind 20 kt. Seas 5 ft. Widespread snow showers and
rain.
.TUE...SW wind 20 kt. Seas 5 ft.
.TUE NIGHT...W wind 20 kt. Seas 5 ft.
.WED...N wind 15 kt. Seas 4 ft.
.THU THROUGH FRI...S wind 20 kt. Seas 5 ft.

$$

PKZ753-250115-
Castle Cape to Cape Tolstoi from 15 to 100 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY TONIGHT AND TUESDAY...

.TODAY...NW wind 20 kt in the morning becoming SW. Seas 5 ft. Rain 
and snow.
.TONIGHT...S wind 30 kt. Seas 8 ft. Rain and snow.
.TUE...SW wind 30 kt. Seas 11 ft.
.TUE NIGHT...SW wind 25 kt. Seas 11 ft.
.WED...NE wind 20 kt. Seas 8 ft.
.THU...SW wind 25 kt. Seas 9 ft.
.FRI...S wind 20 kt. Seas 8 ft.

$$

PKZ754-250115-
Cape Tolstoi to Cape Sarichef out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...N wind 10 kt becoming S 25 kt in the afternoon. Seas 4 ft. 
Snow and rain.
.TONIGHT...SW wind 25 kt. Seas 7 ft. Rain showers.
.TUE...SW wind 25 kt. Seas 9 ft. Rain showers and snow showers.
.TUE NIGHT...NW wind 20 kt. Seas 7 ft.
.WED...N wind 15 kt. Seas 4 ft.
.THU...SW wind 15 kt. Seas 4 ft.
.FRI...S wind 25 kt. Seas 4 ft.

$$

PKZ755-250115-
Cape Tolstoi to Cape Sarichef from 15 to 100 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...NW wind 15 kt becoming S 30 kt in the afternoon. Seas 6 ft.
Rain and snow.
.TONIGHT...SW wind 30 kt. Seas 11 ft.
.TUE...SW wind 30 kt. Seas 11 ft.
.TUE NIGHT...W wind 25 kt. Seas 11 ft.
.WED...N wind 15 kt. Seas 7 ft.
.THU...SW wind 20 kt. Seas 7 ft.
.FRI...S wind 25 kt. Seas 7 ft.

$$

PKZ756-250115-
Port Heiden to Nelson Lagoon out to 15 NM-
403 AM AKDT Mon Apr 24 2023

.TODAY...NW wind 10 kt becoming SE in the afternoon. Seas 3 ft. 
Snow.
.TONIGHT...SE wind 20 kt. Seas 2 ft. Snow and rain.
.TUE...SW wind 20 kt. Seas 5 ft.
.TUE NIGHT...W wind 20 kt. Seas 4 ft.
.WED...NW wind 15 kt. Seas 4 ft.
.THU...SW wind 15 kt. Seas 3 ft.
.FRI...SE wind 20 kt. Seas 2 ft.

$$

PKZ757-250115-
Port Heiden to Nelson Lagoon from 15 to 60 NM-
403 AM AKDT Mon Apr 24 2023

.TODAY...N wind 10 kt becoming S in the afternoon. Seas 3 ft.
.TONIGHT...E wind 20 kt. Seas 3 ft. Freezing spray. Snow.
.TUE...SW wind 15 kt. Seas 5 ft. Snow showers.
.TUE NIGHT...W wind 20 kt. Seas 6 ft.
.WED...NW wind 15 kt. Seas 6 ft.
.THU...SW wind 15 kt. Seas 3 ft.
.FRI...S wind 20 kt. Seas 4 ft.

$$

PKZ758-250115-
Nelson Lagoon to Cape Sarichef out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY TONIGHT...

.TODAY...Variable wind 10 kt becoming SE 20 kt in the afternoon.
Seas 3 ft. Snow and rain.
.TONIGHT...SW wind 25 kt. Seas 7 ft. Widespread rain and snow
showers.
.TUE...SW wind 20 kt. Seas 7 ft. Widespread snow and rain showers.
.TUE NIGHT...W wind 20 kt. Seas 6 ft.
.WED...N wind 15 kt. Seas 4 ft.
.THU...SW wind 20 kt. Seas 2 ft.
.FRI...S wind 25 kt. Seas 3 ft.

$$

PKZ759-250115-
Nelson Lagoon to Cape Sarichef from 15 to 70 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY TONIGHT AND TUESDAY...

.TODAY...E wind 20 kt. Seas 4 ft. Snow and rain.
.TONIGHT...SW wind 25 kt. Seas 7 ft. Rain and snow.
.TUE...W wind 20 kt. Seas 8 ft.
.TUE NIGHT...W wind 20 kt. Seas 7 ft.
.WED...NW wind 15 kt. Seas 5 ft.
.THU...W wind 20 kt. Seas 3 ft.
.FRI...S wind 25 kt. Seas 5 ft.

$$

PKZ770-250115-
Cape Sarichef to Nikoski Bering Side out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...S wind 25 kt becoming W in the afternoon. Seas 5 ft. Rain 
and snow.
.TONIGHT...W wind 30 kt. Seas 8 ft. Rain showers and snow showers.
.TUE...W wind 30 kt diminishing to 20 kt in the afternoon. Seas
11 ft.
.TUE NIGHT...Variable wind 10 kt. Seas 6 ft.
.WED...N wind 20 kt. Seas 4 ft.
.THU...W wind 20 kt. Seas 3 ft.
.FRI...S wind 25 kt. Seas 4 ft.

$$

PKZ772-250115-
Cape Sarichef to Nikoski Bering Side from 15 to 85 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SE wind 30 kt becoming W in the afternoon. Seas 7 ft. Rain 
and snow.
.TONIGHT...W wind 30 kt. Seas 11 ft. Rain and snow.
.TUE...NW wind 30 kt becoming W 20 kt in the afternoon. Seas 11
ft.
.TUE NIGHT...W wind 15 kt. Seas 7 ft.
.WED...N wind 20 kt. Seas 5 ft.
.THU...W wind 20 kt. Seas 5 ft.
.FRI...SW wind 20 kt. Seas 6 ft.

$$

PKZ771-250115-
Unalaska Bay-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY TONIGHT AND TUESDAY...

.TODAY...SE wind increasing to 20 kt. Seas 2 ft. Widespread rain 
showers and snow.
.TONIGHT...W wind 30 kt. Seas 5 ft. Rain showers and snow showers.
.TUE...W wind 30 kt diminishing to 15 kt in the afternoon. Seas 5
ft subsiding to 2 ft in the afternoon. Snow and rain.
.TUE NIGHT...S wind 10 kt. Seas 3 ft.
.WED...N wind 10 kt. Seas 3 ft.
.THU...W wind 15 kt. Seas 2 ft.
.FRI...S wind 15 kt. Seas 2 ft.

$$

PKZ773-250115-
Cape Sarichef to Nikoski Pacific Side out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...S wind 25 kt becoming W in the afternoon. Seas 8 ft. Rain 
and snow.
.TONIGHT...W wind 30 kt. Seas 8 ft.
.TUE...W wind 30 kt diminishing to 20 kt in the afternoon. Seas
9 ft.
.TUE NIGHT...NW wind 15 kt. Seas 7 ft.
.WED...N wind 20 kt. Seas 5 ft.
.THU...W wind 20 kt. Seas 5 ft.
.FRI...SW wind 25 kt. Seas 4 ft.

$$

PKZ774-250115-
Cape Sarichef to Nikoski Pacific Side from 15 to 85 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 30 kt. Seas 10 ft. Rain.
.TONIGHT...W wind 30 kt. Seas 11 ft.
.TUE...W wind 30 kt. Seas 12 ft.
.TUE NIGHT...SW wind 20 kt. Seas 10 ft.
.WED...N wind 20 kt. Seas 7 ft.
.THU...W wind 20 kt. Seas 7 ft.
.FRI...SW wind 30 kt. Seas 8 ft.

$$

PKZ775-250115-
Nikolski to Seguam Bering Side out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 25 kt. Seas 8 ft.
.TONIGHT...W wind 30 kt. Seas 9 ft.
.TUE...W wind 30 kt diminishing to 20 kt in the afternoon. Seas
10 ft.
.TUE NIGHT...W wind 15 kt. Seas 5 ft.
.WED THROUGH THU...W wind 20 kt. Seas 6 ft.
.FRI...SW wind 20 kt. Seas 5 ft.

$$

PKZ776-250115-
Nikolski to Seguam Bering Side from 15 to 85 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...W wind 25 kt. Seas 8 ft.
.TONIGHT...W wind 30 kt. Seas 11 ft.
.TUE...W wind 30 kt diminishing to 20 kt in the afternoon. Seas
11 ft.
.TUE NIGHT...NW wind 15 kt. Seas 6 ft.
.WED THROUGH THU...W wind 20 kt. Seas 7 ft.
.FRI...SW wind 20 kt. Seas 7 ft.

$$

PKZ777-250115-
Nikolski to Seguam Pacfic Side out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 25 kt. Seas 9 ft.
.TONIGHT...W wind 30 kt. Seas 10 ft.
.TUE...W wind 30 kt diminishing to 20 kt in the afternoon. Seas
10 ft.
.TUE NIGHT...NW wind 15 kt. Seas 6 ft.
.WED...NW wind 25 kt. Seas 6 ft.
.THU...W wind 20 kt. Seas 6 ft.
.FRI...S wind 25 kt. Seas 5 ft.

$$

PKZ778-250115-
Nikolski to Seguam Pacific Side from 15 to 75 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 30 kt. Seas 11 ft.
.TONIGHT...W wind 30 kt. Seas 11 ft.
.TUE...W wind 30 kt diminishing to 20 kt in the afternoon. Seas
11 ft.
.TUE NIGHT...NW wind 15 kt. Seas 7 ft.
.WED THROUGH THU...W wind 25 kt. Seas 8 ft.
.FRI...S wind 25 kt. Seas 7 ft.

$$

PKZ780-250115-
Seguam to Adak Bering Side out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...W wind 25 kt. Seas 6 ft.
.TONIGHT...W wind 25 kt. Seas 6 ft.
.TUE...W wind 20 kt. Seas 5 ft.
.TUE NIGHT...NW wind 20 kt. Seas 4 ft.
.WED...NW wind 20 kt. Seas 6 ft.
.THU...W wind 25 kt. Seas 6 ft.
.FRI...N wind 20 kt. Seas 4 ft.

$$

PKZ781-250115-
Seguam to Adak Bering Side from 15 to 85 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...W wind 25 kt. Seas 7 ft.
.TONIGHT...W wind 30 kt. Seas 9 ft.
.TUE...W wind 25 kt diminishing to 15 kt in the afternoon. Seas
8 ft.
.TUE NIGHT...NW wind 15 kt. Seas 5 ft.
.WED...NW wind 20 kt. Seas 7 ft.
.THU...NW wind 25 kt. Seas 7 ft.
.FRI...N wind 20 kt. Seas 6 ft.

$$

PKZ782-250115-
Seguam to Adak Pacific Side out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...W wind 25 kt. Seas 10 ft.
.TONIGHT...W wind 25 kt. Seas 10 ft.
.TUE...W wind 20 kt in the morning diminishing to 10 kt. Seas 8 ft.
.TUE NIGHT...NW wind 20 kt. Seas 6 ft.
.WED...NW wind 20 kt. Seas 6 ft.
.THU...W wind 25 kt. Seas 6 ft.
.FRI...N wind 20 kt. Seas 5 ft.

$$

PKZ783-250115-
Seguam to Adak Pacific Side from 15 to 75 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...W wind 30 kt. Seas 11 ft.
.TONIGHT...W wind 30 kt. Seas 11 ft.
.TUE...W wind 20 kt in the morning becoming variable 10 kt. Seas
9 ft.
.TUE NIGHT...NW wind 25 kt. Seas 7 ft.
.WED THROUGH THU...W wind 25 kt. Seas 9 ft.
.FRI...SE wind 20 kt. Seas 8 ft.

$$

PKZ784-250115-
Adak to Kiska Bering Side-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY TODAY...

.TODAY...W wind 20 kt. Seas 8 ft.
.TONIGHT...W wind 20 kt. Seas 7 ft.
.TUE...W wind 15 kt. Seas 6 ft.
.TUE NIGHT...NW wind 25 kt. Seas 6 ft.
.WED THROUGH THU...NW wind 25 kt. Seas 8 ft.
.FRI...NE wind 30 kt. Seas 9 ft.

$$

PKZ785-250115-
Adak to Kiska Pacific Side-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...W wind 25 kt. Seas 11 ft.
.TONIGHT...W wind 20 kt. Seas 11 ft.
.TUE...NW wind 15 kt. Seas 7 ft.
.TUE NIGHT...NW wind 25 kt. Seas 8 ft.
.WED THROUGH THU...W wind 25 kt. Seas 9 ft.
.FRI...NE wind 30 kt. Seas 11 ft.

$$

PKZ786-250115-
Kiska to Attu Bering Side-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...SW wind 20 kt. Seas 10 ft.
.TONIGHT...W wind 15 kt. Seas 8 ft.
.TUE...NW wind 15 kt. Seas 6 ft.
.TUE NIGHT...NW wind 20 kt. Seas 6 ft.
.WED...NW wind 30 kt. Seas 8 ft.
.THU...NE wind 30 kt. Seas 8 ft.
.FRI...NE wind 35 kt. Seas 11 ft.

$$

PKZ787-250115-
Kiska to Attu Pacific Side-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...SW wind 20 kt. Seas 11 ft.
.TONIGHT...W wind 15 kt. Seas 9 ft.
.TUE...NW wind 20 kt. Seas 7 ft.
.TUE NIGHT...NW wind 25 kt. Seas 8 ft.
.WED...NW wind 30 kt. Seas 9 ft.
.THU...NE wind 35 kt. Seas 9 ft.
.FRI...NE wind 35 kt. Seas 13 ft.

$$

PKZ766-250115-
Pribilof Islands Nearshore Waters-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...E wind increasing to 30 kt. Seas 8 ft. Snow.
.TONIGHT...NE wind 25 kt. Seas 8 ft. Freezing spray. Snow.
.TUE...N wind 15 kt. Seas 7 ft.
.TUE NIGHT...Variable wind 10 kt. Seas 5 ft.
.WED...Variable wind 10 kt. Seas 5 ft.
.THU...NW wind 20 kt. Seas 6 ft.
.FRI...N wind 15 kt. Seas 4 ft.

$$

PKZ760-250115-
Bristol Bay greater than 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY TONIGHT AND TUESDAY...

.TODAY...NE wind 10 kt becoming SE in the afternoon. Seas 2 ft.
.TONIGHT...E wind 25 kt. Seas 4 ft. Freezing spray. Widespread
snow showers.
.TUE...E wind 25 kt becoming SE 15 kt in the afternoon. Seas 4 ft.
Freezing spray before noon.
.TUE NIGHT...S wind 15 kt. Seas 4 ft.
.WED...W wind 15 kt. Seas 4 ft.
.THU...SW wind 15 kt. Seas 3 ft.
.FRI...SE wind 20 kt. Seas 3 ft.

$$

PKZ761-250115-
Bristol Bay from Port Heiden to Cape Chichagof out to 15 NM-
403 AM AKDT Mon Apr 24 2023

.TODAY...N wind 10 kt. Seas 2 ft.
.TONIGHT...E wind 20 kt. Seas 2 ft. Freezing spray. Widespread
snow showers.
.TUE...SE wind 20 kt becoming S 10 kt in the afternoon. Seas 2 ft.
.TUE NIGHT...S wind 15 kt. Seas 3 ft.
.WED...N wind 15 kt. Seas 3 ft.
.THU...SW wind 15 kt. Seas 3 ft.
.FRI...SE wind 25 kt. Seas 2 ft.

$$

PKZ762-250115-
Bristol Bay from Cape Chichagof to Cape Pierce out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...SMALL CRAFT ADVISORY TONIGHT AND TUESDAY...

.TODAY...N wind 15 kt. Seas 2 ft.
.TONIGHT...E wind 25 kt. Seas 4 ft. Freezing spray. Snow.
.TUE...E wind 25 kt diminishing to 15 kt in the afternoon. Seas
4 ft. Freezing spray before noon. Snow.
.TUE NIGHT...S wind 10 kt. Seas 2 ft.
.WED...S wind 10 kt. Seas 2 ft.
.THU...SW wind 15 kt. Seas 2 ft.
.FRI...SE wind 20 kt. Seas 2 ft.

$$

PKZ763-250115-
Kuskokwim Delta and Etolin Strait out to 15 NM-
403 AM AKDT Mon Apr 24 2023

...HEAVY FREEZING SPRAY WARNING THROUGH TONIGHT...

.TODAY...N wind 15 kt. Seas in ice free waters 1 foot. Heavy
freezing spray in the morning.
.TONIGHT...E wind 20 kt. Seas in ice free waters 1 foot. Heavy
freezing spray after midnight.
.TUE...NE wind 20 kt. Seas in ice free waters 1 foot. Freezing spray
in the morning.
.TUE NIGHT...N wind 10 kt. Seas in ice free waters 1 foot.
.WED...NW wind 10 kt. Seas in ice free waters 1 foot.
.THU...W wind 20 kt. Seas in ice free waters 1 foot.
.FRI...SE wind 20 kt. Seas in ice free waters 1 foot.

$$

PKZ764-250115-
Kuskokwim Delta from 15 to 80 NM-
403 AM AKDT Mon Apr 24 2023

...HEAVY FREEZING SPRAY WARNING THROUGH TUESDAY...

.TODAY...NE wind 15 kt. Seas in ice free waters 2 ft. Heavy
freezing spray in the morning.
.TONIGHT...E wind 20 kt. Seas in ice free waters 3 ft. Heavy
freezing spray.
.TUE...NE wind 20 kt. Seas in ice free waters 3 ft. Heavy freezing
spray in the morning.
.TUE NIGHT...NW wind 15 kt. Seas in ice free waters 2 ft.
.WED...W wind 15 kt. Seas in ice free waters 2 ft.
.THU...W wind 20 kt. Seas in ice free waters 2 ft.
.FRI...SE wind 20 kt. Seas in ice free waters 2 ft.

$$

PKZ765-250115-
North and West of Nunivak Island-
403 AM AKDT Mon Apr 24 2023

...BRISK WIND ADVISORY THROUGH TONIGHT...

.TODAY...NE wind 25 kt.
.TONIGHT...NE wind 25 kt diminishing to 15 kt after midnight.
.TUE...NE wind 15 kt.
.TUE NIGHT...N wind 15 kt.
.WED...N wind 20 kt.
.THU...NW wind 30 kt.
.FRI...NE wind 20 kt.

$$

PKZ767-250115-
Saint Matthew Island Waters-
403 AM AKDT Mon Apr 24 2023

...HEAVY FREEZING SPRAY WARNING THROUGH TUESDAY...
...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...NE wind 25 kt E of Saint Matthew Island...E 30 kt W of
Saint Matthew Island. Seas in ice free waters 11 ft. Heavy
freezing spray near the ice edge.
.TONIGHT...NE wind 25 kt. Seas in ice free waters 10 ft. Heavy freezing
spray near the ice edge.
.TUE...N wind 20 kt. Seas in ice free waters 7 ft. Heavy freezing 
spray near the ice edge.
.TUE NIGHT...N wind 25 kt. Seas in ice free waters 6 ft.
.WED...N wind 25 kt. Seas in ice free waters 6 ft.
.THU...N wind 30 kt. Seas in ice free waters 8 ft.
.FRI...N wind 35 kt. Seas in ice free waters 8 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
523 AM AKDT Sun Apr 23 2023

.ANALYSIS AND UPPER LEVELS...

High pressure ridging exists across the eastern Bering Sea and
portions of Southwest Alaska. The polar low tracks into the Gulf
of Alaska this afternoon, with the a series of associated
shortwaves moving east to west across Southern Alaska. Satellite
imagery shows clear skies under the ridge, with incoming cloud
cover with the approach of the shortwaves. Further west, a trough
extending off a Kamchatka low encompasses the western Bering Sea
and Western Aleutians. A secondary low develops at the base of the
trough just north of the eastern Aleutians Monday evening that
will track towards the Alaska Peninsula through mid-week.

&&

.MODEL DISCUSSION...

Models are in good overall synoptic agreement through the short-
term. There are some minor discrepancies with the shortwaves
moving across Southern Alaska as the the low moves into the Gulf
of Alaska. Towards Wednesday, models struggle with a developing
complex system across the Bering Sea.

&&

.AVIATION...
PANC...VFR conditions will persist. Winds will continue to be
gusty at times through the day of today.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 through 3:
Sunday through Tuesday night)...

An upper-level low over Kenai this morning will continue to slide
south over the Gulf of Alaska by late Sunday and over the eastern
Gulf for Monday. A colder and drier airmass is moving into
Southcentral in the wake of the upper-level low. Even with this
drier airmass, there is still some moisture advection and enough
instability to provide for areas of rain and snow showers, mainly
along the coast and across north-facing slopes of the coastal
mountains due and upslope flow.

The vorticity advection and upper-level divergence out ahead of
the upper-level low is also allowing for the development of a
surface low south of the Kenai Peninsula. This low will strengthen
through the day, moving south then east by Monday in tandem with
the track of the upper-level low. The combination of cold air
advection and the increasing pressure gradient between the
developing low and building ridge over the interior has initiated
gusty northerly winds across parts of interior Southcentral and
through coastal gaps. These winds will persist through Monday
morning before the gradient relaxes as the low exits the region
and the cold air advection shuts off.

An inverted trough moving toward Prince William Sound and a weak
upper-level wave entering the Copper River Basin will likely
allow showers to continue into Tuesday for these locations.
Elsewhere, conditions are expected to be rather tranquil for most
of Monday into early Tuesday. For Tuesday, an occluded front will
move first over Kodiak Island and the western Gulf, eventually
moving to the Southcentral coast by Tuesday evening. There may be
enough colder air in place for snow at the onset of precipitation
for Kodiak early Tuesday morning before easterly winds usher in
warmer air and changing the snow quickly to rain. A similar set up
is also expected along the immediate coast. With colder
temperatures across the interior of Kenai Peninsula and aloft, a
heavy, wet snow could persist for elevations above 600 ft,
including Turnagain Pass and Summit Lake into Wednesday morning.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 through 3: Today
through Tuesday night)...

A winter-like pattern has returned to Southwest overnight as cold
air spills in from the northeast behind a front continuing to push
south into the eastern Bering. Colder than average temperatures
and gusty north winds will continue today off to the west of a
stalled upper level low in the Gulf, with highs mostly struggling
to get above the freezing mark. Winds should begin to relax by
tonight as cold air advection finally begins to let up and as a
dry upper trough moves overhead, but cold temperatures dipping
down into the 10s to 20s will persist. A slight warming trend
will begin by Monday as the upper trough continues to pivot west
and as southeasterly flow begins to pick up ahead of developing
low in the Bering. This same system will mark the next chance for
measurable precipitation, with the center expected to move up the
Alaska Peninsula into Bristol Bay on Tuesday. Low level
temperatures will likely be cold enough for snow to fall across
the northern Alaska Peninsula and parts of Bristol Bay, although
some mixing with rain will be possible during the afternoon and
evening as daytime highs finally push above freezing.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 through 3: Today
through Tuesday night)...

A weakening front over the western Bering associated with a broad
Kamchatka low is now approaching Adak, with winds out ahead of the
front still breaching gale force for the time being. Southerly
winds along the front will drop to small craft range as it moves
into the central Aleutians later today and tonight, with low level
temperatures initially warm enough to support mainly rain falling
along the boundary. On Monday, a triple point low will form along
the front southwest of the Pribilofs, with a shield of
precipitation expected to overspread the islands and remain in
place until the evening as the low pulls away and into the Alaska
Peninsula. It's looking more likely low level temperatures will
cool enough for all snow to fall across the Pribilofs near the
low, with warmer temperatures farther south across the eastern
Aleutians keeping precipitation mostly rain. A few inches of
accumulation will be possible across the Pribilofs through Monday
evening, though this will depend heavily on how cold surface
temperatures remain throughout the day. Easterly winds around 20
to 25 kts could lead to some minor blowing snow as well, but it
does not appear likely to cause significant visibility reductions
at this time due to marginally favorable temperatures hovering
right around freezing. A quieter but still unsettled pattern will
continue for the remainder of the period through Tuesday night as
the low shifts into Southwest, leaving behind cool north to
northwest flow and areas of rain/snow showers.

&&

.LONG TERM FORECAST (Days 4 through 7: Wednesday through Saturday)...

Looking ahead in the extended forecast, the latest model runs and
ensemble guidance are in fairly decent agreement with the
evolution and progression of the synoptic features. Starting
midweek, a deep arctic trough and upper low moving in from the
north retrogrades into the Bering Sea, while a ridge builds across
the eastern Alaska mainland. As such, a warm, southerly flow
pattern develops, allowing a series of low pressure systems to
lift northward across Southcentral which will support heavy
rainfall along the coastline. In addition to precipitation, these
systems should lead to periods of gusty winds across portions of
the Gulf of Alaska and Alaska Peninsula. Out west, the upper
trough will usher an unseasonably cold airmass with scattered
showers spreading across the Bering Sea, Aleutian Chain, and
Southwest Alaska through late next week. To the far west, a system
will push its front into the western Aleutians, bringing winds
and rain to the area.

&&

 $$

SYNOPSIS AND MODEL DISCUSSION...KM
SOUTHCENTRAL ALASKA...TM
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...AS
LONG TERM...MF

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE ANCHORAGE AK
338 PM AKDT SUN APR 23 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 AM     SNOW             7 MILES SE OF EAGLE RIV 61.23N 149.44W
04/23/2023  M1.7 INCH        ANCHORAGE          AK   PUBLIC

            OVERNIGHT SNOW.

0300 PM     SNOW             UPPER POTTER MARSH      61.06N 149.76W
04/23/2023  M0.5 INCH        ANCHORAGE          AK   PUBLIC

&&