Small Craft Advisory 69, NWS Anchorage, AK

798 
FZAK52 PAFC 240030
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
330 PM AKST Tue Jan 23 2018

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.

PKZ199-241300-
330 PM AKST Tue Jan 23 2018
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
High pressure remains over the Bering Sea and Central Aleutians 
through Thu afternoon. A narrow trough of low pressure remains 
over the eastern Bering. A front near the Western Aleutians moves 
towards Shemya through Thu afternoon.

$$

PKZ150-241300-
South of the AK Peninsula Sitkinak to Castle Cape-
330 PM AKST Tue Jan 23 2018

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...NW wind 40 kt. Gusts to 55 kt out of bays and passes. 
Seas 12 ft. Freezing spray.
.WED...NW wind 40 kt. Seas 11 ft. Freezing spray.
.WED NIGHT...NW wind 40 kt. Seas 11 ft. Freezing spray.
.THU AND THU NIGHT...NW wind 35 kt. Seas 12 ft.
.FRI THROUGH SAT...N wind 35 kt. Seas 13 ft.
.SUN...N wind 25 kt. Seas 10 ft.

$$

PKZ155-241300-
South of the AK Peninsula Castle Cape to Cape Sarichef-
330 PM AKST Tue Jan 23 2018

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY NIGHT...

.TONIGHT...NW wind 30 kt. Seas 9 ft.
.WED...NW wind 30 kt. Seas 8 ft.
.WED NIGHT...NW wind 30 kt. Seas 8 ft.
.THU...NW wind 25 kt. Seas 8 ft.
.THU NIGHT...NW wind 40 kt. Seas 13 ft.
.FRI...N wind 40 kt. Seas 14 ft.
.SAT...N wind 35 kt. Seas 11 ft.
.SUN...N wind 25 kt. Seas 10 ft.

$$

PKZ160-241300-
Bristol Bay-
330 PM AKST Tue Jan 23 2018

...HEAVY FREEZING SPRAY WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...N wind 15 kt. Seas in ice free waters 3 ft. Heavy
freezing spray.
.WED...N wind 15 kt. Heavy freezing spray. Seas in ice free 
waters 3 ft.
.WED NIGHT...N wind 20 kt. Seas in ice free waters 4 ft. Heavy
freezing spray.
.THU...N wind 25 kt. Seas in ice free waters 5 ft.
.THU NIGHT...N wind 30 kt. Seas in ice free waters 8 ft.
.FRI...N wind 30 kt. Seas in ice free waters 8 ft.
.SAT THROUGH SUN...N wind 25 kt. Seas in ice free waters 5 ft.

$$

PKZ165-241300-
Port Heiden to Cape Sarichef-
330 PM AKST Tue Jan 23 2018

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY NIGHT...

.TONIGHT...NW wind 25 kt except NW 20 kt from Port Moller E. Seas
8 ft. Freezing spray. Snow showers.
.WED...NW wind 20 kt increasing to 30 kt in the afternoon. From
Port Moller E, NW wind 20 kt. Seas 9 ft. Freezing spray.
.WED NIGHT...NW wind 30 kt diminishing to 20 kt after midnight.
From Port Moller E, N wind 25 kt. Seas 9 ft. Freezing spray.
.THU...NW wind 25 kt. Seas 8 ft.
.THU NIGHT...N wind 40 kt. Seas 14 ft.
.FRI...N wind 40 kt. Seas 16 ft.
.SAT THROUGH SUN...N wind 30 kt. Seas 12 ft.

$$

PKZ170-241300-
Cape Sarichef to Nikolski Bering Side-
330 PM AKST Tue Jan 23 2018

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY NIGHT...

.TONIGHT...W wind 25 kt. Seas 8 ft.
.WED...NW wind 25 kt. Seas 8 ft.
.WED NIGHT...NW wind 20 kt. Seas 8 ft.
.THU...NW wind 20 kt. Seas 7 ft.
.THU NIGHT...NW wind 30 kt. Seas 10 ft.
.FRI...N wind 35 kt. Seas 14 ft.
.SAT THROUGH SUN...N wind 30 kt. Seas 12 ft.

$$

PKZ171-241300-
Unalaska Bay-
330 PM AKST Tue Jan 23 2018

...SMALL CRAFT ADVISORY WEDNESDAY...

.TONIGHT...W wind 20 kt. Seas 3 ft.
.WED...NW wind 25 kt. Seas 3 ft building to 7 ft in the afternoon.
.WED NIGHT...NW wind 20 kt. Seas 7 ft.
.THU...NW wind 20 kt. Seas 7 ft.
.THU NIGHT...NW wind 25 kt. Seas 8 ft.
.FRI THROUGH SAT...N wind 30 kt. Seas 11 ft.
.SUN...N wind 20 kt. Seas 7 ft.

$$

PKZ172-241300-
Cape Sarichef to Nikolski Pacific Side-
330 PM AKST Tue Jan 23 2018

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY NIGHT...

.TONIGHT...NW wind 25 kt. Seas 5 ft.
.WED...NW wind 25 kt. Seas 6 ft.
.WED NIGHT...NW wind 25 kt. Seas 6 ft.
.THU...NW wind 20 kt. Seas 6 ft.
.THU NIGHT...NW wind 30 kt. Seas 10 ft.
.FRI...N wind 40 kt. Seas 12 ft.
.SAT...N wind 35 kt. Seas 11 ft.
.SUN...N wind 30 kt. Seas 9 ft.

$$

PKZ173-241300-
Nikloski to Seguam Island Bering Side-
330 PM AKST Tue Jan 23 2018

.TONIGHT...W wind 15 kt. Seas 5 ft.
.WED...W wind 15 kt. Seas 4 ft.
.WED NIGHT...NW wind 15 kt. Seas 4 ft.
.THU...NW wind 15 kt. Seas 5 ft.
.THU NIGHT...NW wind 20 kt. Seas 7 ft.
.FRI THROUGH SAT...N wind 25 kt. Seas 10 ft.
.SUN...NE wind 20 kt. Seas 9 ft.

$$

PKZ174-241300-
Nikolski to Seguam Island Pacific Side-
330 PM AKST Tue Jan 23 2018

.TONIGHT...NW wind 15 kt. Seas 5 ft.
.WED...NW wind 15 kt. Seas 3 ft.
.WED NIGHT...NW wind 15 kt. Seas 5 ft.
.THU...N wind 15 kt. Seas 8 ft.
.THU NIGHT...NW wind 20 kt. Seas 9 ft.
.FRI THROUGH SAT...N wind 25 kt. Seas 9 ft.
.SUN...NE wind 20 kt. Seas 8 ft.

$$

PKZ175-241300-
Seguam Island to Adak Bering Side-
330 PM AKST Tue Jan 23 2018

.TONIGHT...Variable wind 10 kt. Seas 4 ft.
.WED...Variable wind 10 kt. Seas 3 ft.
.WED NIGHT...Variable wind 10 kt. Seas 3 ft.
.THU AND THU NIGHT...Variable wind 10 kt. Seas 4 ft.
.FRI...Variable wind 10 kt. Seas 5 ft.
.SAT...E wind 25 kt. Seas 7 ft.
.SUN...E wind 30 kt. Seas 8 ft.

$$

PKZ176-241300-
Seguam Island to Adak Pacific Side-
330 PM AKST Tue Jan 23 2018

...SMALL CRAFT ADVISORY WEDNESDAY NIGHT...

.TONIGHT...Variable wind 10 kt. Seas 5 ft.
.WED...E wind 15 kt. Seas 5 ft.
.WED NIGHT...SE wind 15 kt. Seas 8 ft.
.THU AND THU NIGHT...SE wind 15 kt. Seas 10 ft.
.FRI...NE wind 15 kt. Seas 8 ft.
.SAT...E wind 25 kt. Seas 9 ft.
.SUN...E wind 30 kt. Seas 11 ft.

$$

PKZ177-241300-
Adak to Kiska-
330 PM AKST Tue Jan 23 2018

...SMALL CRAFT ADVISORY WEDNESDAY NIGHT...

.TONIGHT...S wind 20 kt. Seas 6 ft.
.WED...S wind 20 kt. Seas 6 ft.
.WED NIGHT...SE wind 20 kt. Seas 11 ft Pacific Side...7 ft 
Bering Side.
.THU...SE wind 25 kt. Seas 12 ft.
.THU NIGHT...SE wind 30 kt. Seas 12 ft.
.FRI...SE wind 30 kt. Seas 12 ft.
.SAT THROUGH SUN...E wind 40 kt. Seas 18 ft.

$$

PKZ178-241300-
Kiska to Attu-
330 PM AKST Tue Jan 23 2018

...GALE WARNING WEDNESDAY NIGHT...

.TONIGHT...SE wind 30 kt. Seas 8 ft.
.WED...S wind 30 kt. Seas 10 ft building to 16 ft 
in the afternoon.
.WED NIGHT...SE wind 35 kt. Seas 17 ft.
.THU...SE wind 35 kt. Seas 18 ft.
.THU NIGHT...SE wind 45 kt. Seas 23 ft.
.FRI THROUGH SUN...SE wind 45 kt. Seas 25 ft.

$$

PKZ179-241300-
Pribilof Islands Near Shore Waters-
330 PM AKST Tue Jan 23 2018

...SMALL CRAFT ADVISORY WEDNESDAY...

.TONIGHT...W wind 20 kt. Seas 7 ft.
.WED...NW wind 25 kt. Seas 7 ft.
.WED NIGHT...NW wind 20 kt. Seas 6 ft.
.THU...NW wind 20 kt. Seas 7 ft.
.THU NIGHT...N wind 20 kt. Seas 7 ft.
.FRI THROUGH SUN...NE wind 25 kt. Seas 9 ft.

$$

PKZ180-241300-
Kuskokwim Delta and Etolin Strait-
330 PM AKST Tue Jan 23 2018

...HEAVY FREEZING SPRAY WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...NE wind 15 kt. Seas in ice free waters 3 ft. 
Heavy freezing spray.
.WED...NE wind 15 kt. Seas in ice free waters 3 ft. 
Heavy freezing spray.
.WED NIGHT...N wind 20 kt. Seas in ice free waters 4 ft. 
Heavy freezing spray.
.THU...N wind 20 kt. Seas in ice free waters 4 ft.
.THU NIGHT...N wind 35 kt. Seas in ice free waters 8 ft.
.FRI...N wind 40 kt. Seas in ice free waters 8 ft.
.SAT THROUGH SUN...N wind 30 kt. Seas in ice free waters 6 ft.

$$

PKZ181-241300-
North and West of Nunivak Island-
330 PM AKST Tue Jan 23 2018

.TONIGHT...E wind 15 kt. Seas in ice free waters 2 ft.
.WED...E wind 15 kt. Seas in ice free waters 2 ft.
.WED NIGHT...E wind 15 kt. Seas in ice free waters 2 ft.
.THU...NE wind 15 kt. Seas in ice free waters 2 ft.
.THU NIGHT...N wind 25 kt. Seas in ice free waters 2 ft.
.FRI...N wind 30 kt. Seas in ice free waters 3 ft.
.SAT THROUGH SUN...NE wind 25 kt. Seas in ice free waters 2 ft.

$$

PKZ185-241300-
Saint Matthew Island Waters-
330 PM AKST Tue Jan 23 2018

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TONIGHT...W wind 25 kt. Seas 8 ft. Freezing spray.
.WED...NW wind 25 kt. Seas 8 ft. Freezing spray.
.WED NIGHT...NW wind 20 kt. Seas 7 ft. Freezing spray.
.THU...N wind 15 kt. Seas 8 ft.
.THU NIGHT...NE wind 20 kt. Seas 9 ft.
.FRI THROUGH SUN...NE wind 25 kt. Seas 8 ft.

$$

220 
FZAK52 PAFC 241220
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
320 AM AKST Wed Jan 24 2018

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.

PKZ199-250100-
320 AM AKST Wed Jan 24 2018
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A weak trough of low pressure in the eastern Bering dissipates 
tonight. High pressure persists over the central Bering through
Thu night. A front near the western Aleutians reaches Shemya Thu
night.

$$

PKZ150-250100-
South of the AK Peninsula Sitkinak to Castle Cape-
320 AM AKST Wed Jan 24 2018

...GALE WARNING THROUGH THURSDAY...

.TODAY...NW wind 40 kt. Seas 11 ft. Gusts to 55 kt out of bays and
passes. Freezing spray.
.TONIGHT...NW wind 40 kt. Seas 11 ft. Freezing spray.
.THU...NW wind 35 kt. Seas 11 ft. Freezing spray.
.THU NIGHT...NW wind 35 kt. Seas 12 ft.
.FRI...N wind 35 kt. Seas 12 ft.
.SAT...N wind 30 kt. Seas 8 ft.
.SUN...N wind 25 kt. Seas 8 ft.

$$

PKZ155-250100-
South of the AK Peninsula Castle Cape to Cape Sarichef-
320 AM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...NW wind 25 kt. Seas 8 ft.
.TONIGHT...NW wind 30 kt. Seas 8 ft.
.THU...NW wind 25 kt. Seas 8 ft.
.THU NIGHT...NW wind 35 kt. Seas 12 ft.
.FRI...N wind 40 kt. Seas 14 ft.
.SAT...N wind 35 kt. Seas 10 ft.
.SUN...N wind 25 kt. Seas 8 ft.

$$

PKZ160-250100-
Bristol Bay-
320 AM AKST Wed Jan 24 2018

...HEAVY FREEZING SPRAY WARNING TONIGHT AND THURSDAY...
...SMALL CRAFT ADVISORY THURSDAY...

.TODAY...N wind 15 kt. Seas in ice free waters 3 ft.
.TONIGHT...N wind 20 kt. Seas in ice free waters 3 ft. 
Heavy freezing spray.
.THU...N wind 25 kt. Seas in ice free waters 6 ft. 
Heavy freezing spray.
.THU NIGHT...N wind 30 kt. Seas in ice free waters 9 ft.
.FRI...N wind 30 kt. Seas in ice free waters 8 ft.
.SAT THROUGH SUN...N wind 25 kt. Seas in ice free waters 5 ft.

$$

PKZ165-250100-
Port Heiden to Cape Sarichef-
320 AM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...NW wind 20 kt increasing to 30 kt in the afternoon. 
From Port Moller E, NW wind 20 kt. Seas 8 ft. Freezing spray.
.TONIGHT...NW wind 30 kt diminishing to 20 kt after midnight. 
From Port Moller E, N wind 20 kt. Seas 9 ft. Freezing spray.
.THU...NW wind 25 kt. Seas 8 ft. Freezing spray.
.THU NIGHT...N wind 40 kt. Seas 14 ft.
.FRI...N wind 40 kt. Seas 16 ft.
.SAT THROUGH SUN...N wind 30 kt. Seas 12 ft.

$$

PKZ170-250100-
Cape Sarichef to Nikolski Bering Side-
320 AM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...NW wind 25 kt. Seas 8 ft.
.TONIGHT...NW wind 20 kt. Seas 8 ft.
.THU...NW wind 20 kt. Seas 7 ft.
.THU NIGHT...NW wind 30 kt. Seas 10 ft.
.FRI...N wind 35 kt. Seas 14 ft.
.SAT THROUGH SUN...N wind 30 kt. Seas 12 ft.

$$

PKZ171-250100-
Unalaska Bay-
320 AM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...NW wind 25 kt. Seas 7 ft.
.TONIGHT...NW wind 25 kt. Seas 7 ft.
.THU...NW wind 20 kt. Seas 7 ft.
.THU NIGHT...NW wind 25 kt. Seas 9 ft.
.FRI...N wind 30 kt. Seas 13 ft.
.SAT...N wind 25 kt. Seas 10 ft.
.SUN...N wind 20 kt. Seas 7 ft.

$$

PKZ172-250100-
Cape Sarichef to Nikolski Pacific Side-
320 AM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...NW wind 25 kt. Seas 6 ft.
.TONIGHT...NW wind 25 kt. Seas 6 ft.
.THU...NW wind 20 kt. Seas 6 ft.
.THU NIGHT...NW wind 30 kt. Seas 10 ft.
.FRI...N wind 40 kt. Seas 13 ft.
.SAT...N wind 35 kt. Seas 11 ft.
.SUN...N wind 30 kt. Seas 8 ft.

$$

PKZ173-250100-
Nikloski to Seguam Island Bering Side-
320 AM AKST Wed Jan 24 2018

.TODAY...W wind 15 kt. Seas 4 ft.
.TONIGHT...NW wind 15 kt. Seas 4 ft.
.THU...NW wind 15 kt. Seas 6 ft.
.THU NIGHT...NW wind 20 kt. Seas 7 ft.
.FRI THROUGH SUN...NE wind 25 kt. Seas 10 ft.

$$

PKZ174-250100-
Nikolski to Seguam Island Pacific Side-
320 AM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY THURSDAY...

.TODAY...NW wind 15 kt. Seas 3 ft.
.TONIGHT...NW wind 15 kt. Seas 5 ft.
.THU...N wind 15 kt. Seas 8 ft.
.THU NIGHT...NW wind 20 kt. Seas 8 ft.
.FRI THROUGH SUN...NE wind 25 kt. Seas 9 ft.

$$

PKZ175-250100-
Seguam Island to Adak Bering Side-
320 AM AKST Wed Jan 24 2018

.TODAY...Variable wind 10 kt. Seas 3 ft.
.TONIGHT...Variable wind 10 kt. Seas 3 ft.
.THU...Variable wind 10 kt. Seas 4 ft.
.THU NIGHT...S wind 15 kt. Seas 4 ft.
.FRI...E wind 15 kt. Seas 5 ft.
.SAT...E wind 25 kt. Seas 7 ft.
.SUN...E wind 30 kt. Seas 9 ft.

$$

PKZ176-250100-
Seguam Island to Adak Pacific Side-
320 AM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY TONIGHT AND THURSDAY...

.TODAY...SE wind 15 kt. Seas 5 ft.
.TONIGHT...SE wind 15 kt. Seas 9 ft.
.THU...E wind 15 kt. Seas 11 ft.
.THU NIGHT...E wind 15 kt. Seas 10 ft.
.FRI...E wind 15 kt. Seas 8 ft.
.SAT...E wind 25 kt. Seas 8 ft.
.SUN...E wind 30 kt. Seas 11 ft.

$$

PKZ177-250100-
Adak to Kiska-
320 AM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY TONIGHT AND THURSDAY...

.TODAY...S wind 20 kt. Seas 6 ft.
.TONIGHT...SE wind 20 kt. Seas 11 ft.
.THU...SE wind 25 kt. Seas 11 ft.
.THU NIGHT...SE wind 30 kt. Seas 12 ft.
.FRI...SE wind 30 kt. Seas 12 ft.
.SAT...SE wind 35 kt. Seas 15 ft.
.SUN...E wind 40 kt. Seas 17 ft.

$$

PKZ178-250100-
Kiska to Attu-
320 AM AKST Wed Jan 24 2018

...GALE WARNING THURSDAY...

.TODAY...S wind 30 kt. Seas 11 ft building to 16 ft in the
afternoon.
.TONIGHT...SE wind 30 kt. Seas 16 ft.
.THU...SE wind 35 kt. Seas 18 ft.
.THU NIGHT...SE wind 45 kt. Seas 23 ft.
.FRI...SE wind 45 kt. Seas 26 ft.
.SAT...SE wind 40 kt. Seas 24 ft.
.SUN...E wind 45 kt. Seas 27 ft.

$$

PKZ179-250100-
Pribilof Islands Near Shore Waters-
320 AM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY TODAY...

.TODAY...NW wind 25 kt. Seas 7 ft.
.TONIGHT...NW wind 20 kt. Seas 6 ft.
.THU...NW wind 20 kt. Seas 6 ft.
.THU NIGHT...N wind 20 kt. Seas 7 ft.
.FRI THROUGH SUN...NE wind 25 kt. Seas 9 ft.

$$

PKZ180-250100-
Kuskokwim Delta and Etolin Strait-
320 AM AKST Wed Jan 24 2018

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

.TODAY...NE wind 15 kt. Seas in ice free waters 3 ft. 
Heavy freezing spray.
.TONIGHT...NE wind 20 kt. Seas in ice free waters 4 ft. 
Heavy freezing spray.
.THU...N wind 20 kt. Seas in ice free waters 4 ft. Freezing spray.
.THU NIGHT...N wind 35 kt. Seas in ice free waters 8 ft.
.FRI...N wind 40 kt. Seas in ice free waters 8 ft.
.SAT...N wind 35 kt. Seas in ice free waters 6 ft.
.SUN...N wind 30 kt. Seas in ice free waters 5 ft.

$$

PKZ181-250100-
North and West of Nunivak Island-
320 AM AKST Wed Jan 24 2018

.TODAY...SE wind 20 kt. Seas in ice free waters 2 ft.
.TONIGHT...E wind 15 kt. Seas in ice free waters 2 ft.
.THU...N wind 20 kt. Seas in ice free waters 1 foot.
.THU NIGHT...N wind 25 kt. Seas in ice free waters 2 ft.
.FRI...N wind 30 kt. Seas in ice free waters 3 ft.
.SAT THROUGH SUN...NE wind 25 kt. Seas in ice free waters 3 ft.

$$

PKZ185-250100-
Saint Matthew Island Waters-
320 AM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY TODAY AND THURSDAY...

.TODAY...W wind 25 kt. Seas 8 ft. Freezing spray.
.TONIGHT...NW wind 20 kt. Seas 7 ft. Freezing spray.
.THU...NW wind 15 kt. Seas 8 ft. Freezing spray.
.THU NIGHT...NE wind 25 kt. Seas 8 ft.
.FRI THROUGH SUN...NE wind 25 kt. Seas 9 ft.

$$

745 
FZAK52 PAFC 250026
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
326 PM AKST Wed Jan 24 2018

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.

PKZ199-251300-
326 PM AKST Wed Jan 24 2018
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A weak trough in the eastern Bering dissipates by Thu afternoon. 
High pressure persists over the Central Bering through Fri afternoon.
A front approaches the Western Aleutians through Fri afternoon.

$$

PKZ150-251300-
South of the AK Peninsula Sitkinak to Castle Cape-
326 PM AKST Wed Jan 24 2018

...GALE WARNING THROUGH THURSDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...NW wind 40 kt. Gusts to 55 kt out of bays and passes. 
Seas 11 ft. Heavy freezing spray.
.THU...NW wind 35 kt. Gusts to 50 kt out of bays and passes. 
Seas 11 ft. Heavy freezing spray.
.THU NIGHT...NW wind 35 kt. Gusts to 55 kt out of bays and passes. 
Seas 12 ft. Heavy freezing spray. Widespread snow showers.
.FRI...N wind 40 kt. Seas 11 ft.
.FRI NIGHT...N wind 30 kt. Seas 9 ft.
.SAT...N wind 30 kt. Seas 9 ft.
.SUN...N wind 25 kt. Seas 8 ft.
.MON...N wind 20 kt. Seas 8 ft.

$$

PKZ155-251300-
South of the AK Peninsula Castle Cape to Cape Sarichef-
326 PM AKST Wed Jan 24 2018

...GALE WARNING THURSDAY NIGHT...

.TONIGHT...NW wind 30 kt. Seas 7 ft.
.THU...NW wind 25 kt. Seas 7 ft.
.THU NIGHT...NW wind 30 kt increasing to 40 kt after midnight.
Seas 13 ft. Gusts to 55 kt out of bays and passes after midnight. 
Freezing spray.
.FRI AND FRI NIGHT...N wind 40 kt. Seas 14 ft.
.SAT...N wind 30 kt. Seas 10 ft.
.SUN...N wind 25 kt. Seas 8 ft.
.MON...N wind 15 kt. Seas 7 ft.

$$

PKZ160-251300-
Bristol Bay-
326 PM AKST Wed Jan 24 2018

...GALE WARNING THURSDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...N wind 15 kt. Seas in ice free waters 3 ft. Heavy
freezing spray.
.THU...N wind 25 kt. Seas in ice free waters 6 ft. Heavy freezing
spray.
.THU NIGHT...N wind 35 kt. Seas in ice free waters 9 ft. Heavy
freezing spray.
.FRI...N wind 30 kt. Seas in ice free waters 9 ft.
.FRI NIGHT...N wind 25 kt. Seas in ice free waters 6 ft.
.SAT THROUGH SUN...N wind 25 kt. Seas in ice free waters 5 ft.
.MON...NE wind 20 kt. Seas in ice free waters 4 ft.

$$

PKZ165-251300-
Port Heiden to Cape Sarichef-
326 PM AKST Wed Jan 24 2018

...GALE WARNING THURSDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING THURSDAY NIGHT...

.TONIGHT...NW wind 25 kt W of Port Moller before midnight...otherwise
NW wind 20 kt. Seas 8 ft. Freezing spray. Snow showers.
.THU...NW wind 25 kt. Seas 8 ft. Freezing spray. Snow showers.
.THU NIGHT...N wind 40 kt. Seas 15 ft. Heavy freezing spray E of Port
Moller. Snow showers.
.FRI AND FRI NIGHT...N wind 40 kt. Seas 17 ft.
.SAT THROUGH SUN...N wind 30 kt. Seas 12 ft.
.MON...N wind 20 kt. Seas 8 ft.

$$

PKZ170-251300-
Cape Sarichef to Nikolski Bering Side-
326 PM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY NIGHT...

.TONIGHT...NW wind 20 kt. Seas 8 ft.
.THU...NW wind 20 kt. Seas 8 ft.
.THU NIGHT...NW wind 30 kt. Seas 11 ft.
.FRI AND FRI NIGHT...N wind 35 kt. Seas 17 ft.
.SAT THROUGH SUN...N wind 30 kt. Seas 12 ft.
.MON...NE wind 25 kt. Seas 11 ft.

$$

PKZ171-251300-
Unalaska Bay-
326 PM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY TONIGHT AND THURSDAY NIGHT...

.TONIGHT...NW wind 25 kt. Seas 7 ft.
.THU...NW wind 20 kt. Seas 7 ft.
.THU NIGHT...N wind 30 kt. Seas 10 ft. Snow showers.
.FRI...NW wind 35 kt. Seas 13 ft.
.FRI NIGHT...N wind 30 kt. Seas 13 ft.
.SAT...N wind 25 kt. Seas 10 ft.
.SUN...N wind 20 kt. Seas 7 ft.
.MON...NE wind 15 kt. Seas 3 ft.

$$

PKZ172-251300-
Cape Sarichef to Nikolski Pacific Side-
326 PM AKST Wed Jan 24 2018

...GALE WARNING THURSDAY NIGHT...

.TONIGHT...NW wind 25 kt. Seas 6 ft.
.THU...NW wind 25 kt. Seas 7 ft.
.THU NIGHT...NW wind 35 kt. Gusts to 50 kt out of bays and passes. 
Seas 11 ft.
.FRI AND FRI NIGHT...N wind 40 kt. Seas 15 ft.
.SAT...N wind 35 kt. Seas 11 ft.
.SUN...N wind 30 kt. Seas 8 ft.
.MON...NE wind 20 kt. Seas 6 ft.

$$

PKZ173-251300-
Nikloski to Seguam Island Bering Side-
326 PM AKST Wed Jan 24 2018

.TONIGHT...NW wind 15 kt. Seas 4 ft.
.THU...NW wind 15 kt. Seas 6 ft.
.THU NIGHT...N wind 20 kt. Seas 6 ft.
.FRI AND FRI NIGHT...N wind 25 kt. Seas 10 ft.
.SAT THROUGH MON...NE wind 25 kt. Seas 10 ft.

$$

PKZ174-251300-
Nikolski to Seguam Island Pacific Side-
326 PM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY THURSDAY AND THURSDAY NIGHT...

.TONIGHT...NW wind 15 kt. Seas 5 ft.
.THU...NW wind 20 kt. Seas 8 ft.
.THU NIGHT...NW wind 20 kt. Seas 8 ft.
.FRI...N wind 25 kt. Seas 8 ft.
.FRI NIGHT...N wind 30 kt. Seas 10 ft.
.SAT THROUGH MON...NE wind 25 kt. Seas 9 ft.

$$

PKZ175-251300-
Seguam Island to Adak Bering Side-
326 PM AKST Wed Jan 24 2018

.TONIGHT...Variable wind 10 kt. Seas 3 ft.
.THU...Variable wind 10 kt. Seas 4 ft.
.THU NIGHT...SE wind 15 kt. Seas 4 ft.
.FRI...E wind 15 kt. Seas 4 ft.
.FRI NIGHT...Variable wind 10 kt. Seas 5 ft.
.SAT...E wind 25 kt. Seas 8 ft.
.SUN THROUGH MON...E wind 30 kt. Seas 9 ft.

$$

PKZ176-251300-
Seguam Island to Adak Pacific Side-
326 PM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY NIGHT...

.TONIGHT...SE wind 15 kt. Seas 9 ft.
.THU...E wind 15 kt. Seas 10 ft.
.THU NIGHT...E wind 15 kt. Seas 9 ft.
.FRI AND FRI NIGHT...NE wind 15 kt. Seas 8 ft.
.SAT...E wind 25 kt. Seas 8 ft.
.SUN THROUGH MON...E wind 30 kt. Seas 11 ft.

$$

PKZ177-251300-
Adak to Kiska-
326 PM AKST Wed Jan 24 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY NIGHT...

.TONIGHT...SE wind 20 kt. Seas 11 ft.
.THU...SE wind 25 kt. Seas 11 ft.
.THU NIGHT...SE wind 30 kt. Seas 11 ft.
.FRI...SE wind 30 kt. Seas 12 ft.
.FRI NIGHT...SE wind 25 kt. Seas 12 ft.
.SAT...SE wind 35 kt. Seas 15 ft.
.SUN...E wind 40 kt. Seas 17 ft.
.MON...E wind 30 kt. Seas 15 ft.

$$

PKZ178-251300-
Kiska to Attu-
326 PM AKST Wed Jan 24 2018

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...SE wind 35 kt. Seas 17 ft.
.THU...SE wind 35 kt. Seas 18 ft.
.THU NIGHT...SE wind 35 kt increasing to 45 kt after midnight.
Bering side, seas 18 ft. Pacific side, seas 19 ft building to 25 ft 
after midnight.
.FRI...SE wind 45 kt. Seas 27 ft.
.FRI NIGHT...SE wind 30 kt. Seas 20 ft.
.SAT...SE wind 40 kt. Seas 24 ft.
.SUN...E wind 45 kt. Seas 27 ft.
.MON...E wind 30 kt. Seas 21 ft.

$$

PKZ179-251300-
Pribilof Islands Near Shore Waters-
326 PM AKST Wed Jan 24 2018

.TONIGHT...NW wind 20 kt. Seas 7 ft.
.THU...NW wind 20 kt. Seas 7 ft. Freezing spray.
.THU NIGHT...N wind 20 kt. Seas 7 ft. Freezing spray.
.FRI...N wind 25 kt. Seas 9 ft.
.FRI NIGHT...N wind 30 kt. Seas 10 ft.
.SAT THROUGH MON...NE wind 25 kt. Seas 10 ft.

$$

PKZ180-251300-
Kuskokwim Delta and Etolin Strait-
326 PM AKST Wed Jan 24 2018

...GALE WARNING THURSDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...NE wind 20 kt. Seas in ice free waters 3 ft. Heavy
freezing spray.
.THU...N wind 25 kt. Seas in ice free waters 4 ft. Heavy freezing
spray.
.THU NIGHT...N wind 35 kt. Seas in ice free waters 7 ft. Heavy
freezing spray.
.FRI AND FRI NIGHT...N wind 40 kt. Seas in ice free waters 8 ft.
.SAT THROUGH MON...NE wind 30 kt. Seas in ice free waters 6 ft.

$$

PKZ181-251300-
North and West of Nunivak Island-
326 PM AKST Wed Jan 24 2018

...HEAVY FREEZING SPRAY WARNING THURSDAY NIGHT...
...SMALL CRAFT ADVISORY THURSDAY NIGHT...

.TONIGHT...E wind 20 kt. Seas in ice free waters 1 ft. Freezing 
spray.
.THU...N wind 20 kt. Seas in ice free waters 2 ft. Freezing spray.
.THU NIGHT...N wind 25 kt. Seas in ice free waters 3 ft. Heavy
freezing spray.
.FRI AND FRI NIGHT...N wind 30 kt. Seas in ice free waters 4 ft.
.SAT THROUGH MON...NE wind 25 kt. Seas in ice free waters 3 ft.

$$

PKZ185-251300-
Saint Matthew Island Waters-
326 PM AKST Wed Jan 24 2018

...HEAVY FREEZING SPRAY WARNING THURSDAY NIGHT...
...SMALL CRAFT ADVISORY THURSDAY AND THURSDAY NIGHT...

.TONIGHT...NW wind 20 kt. Seas 7 ft. Freezing spray.
.THU...NW wind 20 kt. Seas 8 ft. Freezing spray.
.THU NIGHT...N wind 25 kt E of Saint Matthew Island...E 15 kt 
W of Saint Matthew Island. Seas 9 ft. Heavy freezing spray 
E of Saint Matthew Island.
.FRI AND FRI NIGHT...NE wind 25 kt. Seas 8 ft.
.SAT THROUGH MON...NE wind 25 kt. Seas 9 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
433 PM AKST Mon Jan 22 2018

.ANALYSIS AND UPPER LEVELS...
An upper level trough stretches from Point Barrow through Bristol
Bay with ridging over the central Bering Sea. West of this trough
is the dry northerly flow with precipitation chances east of this
trough. Cold advection is evident at 850 mb with temperatures at
this level near -6C along the north Gulf coast and dropping to
-15C along the Alaska Range, with temperatures -20C or colder west of
 the Alaska Range. A wave along the north Gulf coast will move
 inland tonight and interact with the slowly moving 500 mb trough
 causing a deformation zone to develop overnight in Southcentral
 Alaska. Strong cold advection is also bringing gusty north-to-
 northwest winds from the Eastern Aleutians through Kodiak Island.

&&

.MODEL DISCUSSION...
Models are in good synoptic agreement with similar solutions for
the major features through most of the week. What is worth
watching is the way some subtle differences pop up from run-to-run.
The models are trying to locate the area where the deformation
zone will develop over Southcentral Alaska overnight which will
correlate with the heaviest snowfall. Right now the NAM is the
farthest east of the solutions with the GFS just west of it and
GEM the farthest west. The 500 mb trough is also a key player in
Southcentral snowfall and models have slowed its passage through
the Anchorage and Mat-Su areas until Tuesday evening which can
allow the snow to linger until it passes east of the area.

&&

.AVIATION...
PANC...Ceilings will begin to lower this evening as the snowfall
moves closer to the area but should remain in the 3500 to 5000 ft
range until around midnight when the snowfall will intensify. This
will likely bring in IFR visibilities and MVFR to IFR ceilings
though tomorrow morning. Lingering snowfall will persist until
late tomorrow afternoon, but overall ceilings and visibilities
should be better tomorrow afternoon and evening.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2)...
From a synoptic view, there is a polar vortex north of the Brooks
Range that will dig south and a decaying low over the Gulf of
Alaska that will eject a shortwave north towards Prince William
Sound. This setup will result in a batch of fresh powdery snow for
the Anchorage Bowl with a snow ratio of 20:1. The current
assessment is that the snow will begin tonight and ramp up early
in the early morning, impacting the commute. Expect 2 to 4 inches
of new snow to blanket the Anchorage Metro area and the Mat-Su
Valleys. The deformation zone that sets up over Prince William
Sound will linger until a shortwave from the polar vortex clips
the Kenai Peninsula, effectively putting an end to the moisture
supply and shifting the dynamics eastward. The temperatures aloft
will radically decrease, with some of the coldest air of the
winter settling in across the region on Wednesday.

The other sensible weather highlight this forecast period is the
outflow winds. There is a strong thermal gradient along the
Aleutian Range. At 925 mb north of the Aleutian Range the
temperature ranges from -20C to -30C and south of the Aleutian
Range the temperatures range from -2C to -12C. The models hang
onto this gradient most of the forecast period. This pattern will
result in rough seas and strong gap flows with gale to storm
gusts for the Western Gulf marine areas through Wednesday.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2: Tuesday and
Wednesday)...
Quiet weather ongoing across Southwest Alaska will be punctuated
by the only real weather hazard...frigid cold. An upper level low
currently centered just north of the Brooks Range of northern
Alaska will slowly drift southward over the next couple days.
The upper level low center signifies the core of the coldest air
across Alaska. Thus as it moves southward, temperatures will
continue to drop. So with as cold as it has been across Southwest
Alaska the past several days, even colder air is to come. Lows
across the lower Kuskokwim Valley will easily drop south of 30
below so long as winds remain calm. High pressure over the area
will continue to keep the winds light. Thus, despite the cooling
temperatures, wind chill concerns are not expected. However, in
any localized interior areas where the winds can climb, wind chill
concerns would be a real possibility.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2)...
The weather across the Bering Sea will be a bit more active than
mainland Alaska. A large ridge of high pressure over the central
Bering remains nearly stationary. It is acting as a block on any
significant weather moving into the Bering from the west. A front
attempts to intrude into the Bering on Wednesday, but is only
expected to get as far as Attu and Shemya before shearing out and
dissipating. This is thanks to the giant area of high pressure
over the central Bering. Underneath the high itself, temperatures
are much warmer than those being experienced on the mainland, but
still cold enough that there are some precipitation type concerns
from any showers moving over the area. Stratus remains dominant
over much of the central Bering under the high pressure dome. The
front moving into the western Aleutians will bring somewhat warmer
air to that area on Wednesday, so the predominant precipitation
type at that point will be rain.

For the eastern Bering on the cold side of the high, continued
outflow from Southwest Alaska will keep conditions cold and
showery. In this pattern, upslope snow will continue to be a
constant threat along the Alaska Peninsula, where Cold Bay
experienced snow and blowing snow through much of the day. Strong
winds will also continue into the day Tuesday, especially through
bays and passes. Otherwise, the sea ice edge continues to expand
out from the coast in these very favorable conditions for growth.

&&

.LONG TERM FORECAST (Days 3 through 7)...
Beginning the extended period forecast Wednesday night, the main
story will still be the very cold upper vortex stretching from NW
Alaska to the Gulf of AK. The coldest air mass of this winter will
be moving south into Southern Alaska as 850 hpa temperatures drop
to the -20C to -30 C range. Broad cyclonic flow will extend from
the Bering Sea to a developing low in the Gulf of Alaska as the
cold upper low digs southward. Most inland areas will be quite
cold Thursday morning with little to no relief during the day as
cold air advection increases. There is the chance some locations
Thursday actually get colder as the day progresses. Snow along the
eastern periphery of the upper low will spread from the Copper
Basin and North Gulf Coast to the Kenai coast and Kodiak Island as
the low retrogrades west on Friday. The low will eventually dig
south through the weekend which means most coastal locations will
dry out although Kodiak will remain under the threat for
accumulating snow as bands of precip wrap around the upper low
through the weekend.

By Monday, high latitude blocking will have established itself
over Eastern Siberia, keeping all of southern Alaska under the
influence of arctic high pressure and continued below average
temperatures. This pattern will keep the storm track over the far
western Bering Sea.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Heavy Freezing Spray 130 138 150 160 165 180 181.
         Gale Warning 127 130 131 138 150 155 165 172.

&&

SYNOPSIS AND MODEL DISCUSSION...EZ
SOUTHCENTRAL ALASKA...PS
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...JW
LONG TERM...JA