Gale Warning 391, NWS Anchorage, AK

727 
FZAK52 PAFC 242356
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
356 PM AKDT Thu Aug 24 2017

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.

PKZ199-251230-
356 PM AKDT Thu Aug 24 2017
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A 990 mb low 25 nm south of Dillingham will track to 35 nm south of 
Sitkinak Fri afternoon, then exit across the Gulf of Alaska. A front 
will move to the Western Aleutians Thu night. A developing low will 
then track to 165 nm north of Shemya Sat afternoon at 984 mb.

$$

PKZ150-251230-
South of the AK Peninsula Sitkinak to Castle Cape-
356 PM AKDT Thu Aug 24 2017

...GALE WARNING FRIDAY...

.TONIGHT...W wind 30 kt. Seas 11 ft.
.FRI...W wind 35 kt except 25 kt E of Chirikof Island. Seas 11 ft.
.FRI NIGHT...NW wind 25 kt. Seas 11 ft.
.SAT AND SAT NIGHT...W wind 15 kt. Seas 7 ft.
.SUN...SE wind 15 kt. Seas 5 ft.
.MON THROUGH TUE...NE wind 20 kt. Seas 9 ft.

$$

PKZ155-251230-
South of the AK Peninsula Castle Cape to Cape Sarichef-
356 PM AKDT Thu Aug 24 2017

...GALE WARNING FRIDAY...

.TONIGHT...W wind 30 kt. Seas 10 ft.
.FRI...W wind 35 kt. Seas 12 ft.
.FRI NIGHT...NW wind 30 kt. Seas 10 ft.
.SAT...NW wind 20 kt. Seas 7 ft.
.SAT NIGHT...NW wind 15 kt. Seas 5 ft.
.SUN...SW wind 15 kt. Seas 4 ft.
.MON...N wind 20 kt. Seas 6 ft.
.TUE...NW wind 20 kt. Seas 7 ft.

$$

PKZ160-251230-
Bristol Bay-
356 PM AKDT Thu Aug 24 2017

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TONIGHT...NW wind 30 kt. Seas 8 ft. Rain.
.FRI...N wind 20 kt. Seas 8 ft.
.FRI NIGHT...NW wind 15 kt. Seas 5 ft.
.SAT AND SAT NIGHT...W wind 15 kt. Seas 5 ft.
.SUN...SE wind 15 kt. Seas 3 ft.
.MON THROUGH TUE...NE wind 20 kt. Seas 3 ft.

$$

PKZ165-251230-
Port Heiden to Cape Sarichef-
356 PM AKDT Thu Aug 24 2017

...GALE WARNING THROUGH FRIDAY...

.TONIGHT...NW wind 35 kt. Seas 12 ft. Rain.
.FRI...NW wind 35 kt. Seas 13 ft. Rain.
.FRI NIGHT...NW wind 25 kt. Seas 9 ft.
.SAT...NW wind 20 kt. Seas 7 ft.
.SAT NIGHT...W wind 15 kt. Seas 6 ft.
.SUN...E wind 15 kt. Seas 4 ft.
.MON...NE wind 20 kt. Seas 5 ft.
.TUE...N wind 20 kt. Seas 5 ft.

$$

PKZ170-251230-
Cape Sarichef to Nikolski Bering Side-
356 PM AKDT Thu Aug 24 2017

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TONIGHT...NW wind 25 kt. Seas 9 ft.
.FRI...NW wind 25 kt. Seas 9 ft.
.FRI NIGHT...NW wind 20 kt. Seas 7 ft.
.SAT...NW wind 15 kt. Seas 5 ft.
.SAT NIGHT...W wind 15 kt. Seas 5 ft.
.SUN...SE wind 15 kt. Seas 4 ft.
.MON THROUGH TUE...NW wind 20 kt. Seas 6 ft.

$$

PKZ171-251230-
Unalaska Bay-
356 PM AKDT Thu Aug 24 2017

.TONIGHT...NW wind 20 kt. Seas 7 ft.
.FRI...NW wind 20 kt. Seas 6 ft.
.FRI NIGHT...NW wind 20 kt. Seas 5 ft.
.SAT...NW wind 15 kt. Seas 4 ft.
.SAT NIGHT...W wind 10 kt. Seas 3 ft.
.SUN...Variable wind less than 10 kt. Seas 3 ft.
.MON THROUGH TUE...NW wind 15 kt. Seas 4 ft.

$$

PKZ172-251230-
Cape Sarichef to Nikolski Pacific Side-
356 PM AKDT Thu Aug 24 2017

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TONIGHT...NW wind 25 kt. Seas 8 ft.
.FRI...NW wind 25 kt. Seas 7 ft.
.FRI NIGHT...NW wind 20 kt. Seas 6 ft.
.SAT...NW wind 20 kt. Seas 5 ft.
.SAT NIGHT...W wind 15 kt. Seas 4 ft.
.SUN...S wind 20 kt. Seas 7 ft.
.MON THROUGH TUE...NW wind 25 kt. Seas 8 ft.

$$

PKZ173-251230-
Nikloski to Seguam Island Bering Side-
356 PM AKDT Thu Aug 24 2017

.TONIGHT...N wind 15 kt. Seas 6 ft.
.FRI...NW wind 15 kt. Seas 5 ft.
.FRI NIGHT...NW wind 15 kt. Seas 5 ft.
.SAT...Variable wind 10 kt. Seas 4 ft.
.SAT NIGHT...S wind 20 kt. Seas 5 ft.
.SUN...SE wind 20 kt. Seas 6 ft.
.MON THROUGH TUE...NW wind 20 kt. Seas 6 ft.

$$

PKZ174-251230-
Nikolski to Seguam Island Pacific Side-
356 PM AKDT Thu Aug 24 2017

.TONIGHT...N wind 15 kt. Seas 6 ft.
.FRI AND FRI NIGHT...NW wind 15 kt. Seas 5 ft.
.SAT...Variable wind 10 kt. Seas 5 ft.
.SAT NIGHT...S wind 15 kt. Seas 6 ft.
.SUN...S wind 20 kt. Seas 8 ft.
.MON THROUGH TUE...NW wind 25 kt. Seas 8 ft.

$$

PKZ175-251230-
Seguam Island to Adak Bering Side-
356 PM AKDT Thu Aug 24 2017

.TONIGHT...Variable wind 10 kt. Seas 4 ft.
.FRI...SE wind 15 kt. Seas 5 ft. Patchy fog.
.FRI NIGHT...SE wind 20 kt. Seas 6 ft. Patchy fog.
.SAT AND SAT NIGHT...SE wind 25 kt. Seas 8 ft.
.SUN...W wind 20 kt. Seas 6 ft.
.MON THROUGH TUE...N wind 20 kt. Seas 6 ft.

$$

PKZ176-251230-
Seguam Island to Adak Pacific Side-
356 PM AKDT Thu Aug 24 2017

...SMALL CRAFT ADVISORY FRIDAY NIGHT...

.TONIGHT...Variable wind 10 kt. Seas 5 ft. Patchy fog.
.FRI...SE wind 15 kt. Seas 5 ft. Patchy fog.
.FRI NIGHT...SE wind 25 kt. Seas 8 ft. Patchy fog.
.SAT...SE wind 25 kt. Seas 8 ft.
.SAT NIGHT...S wind 20 kt. Seas 7 ft.
.SUN...W wind 20 kt. Seas 7 ft.
.MON THROUGH TUE...NW wind 20 kt. Seas 7 ft.

$$

PKZ177-251230-
Adak to Kiska-
356 PM AKDT Thu Aug 24 2017

...SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT...

.TONIGHT...E wind 15 kt. Seas 5 ft. Patchy fog. Rain.
.FRI...SE wind 25 kt. Seas 5 ft building to 9 ft in the afternoon.
Patchy fog.
.FRI NIGHT...SE wind 30 kt. Seas 10 ft. Areas of fog. Rain.
.SAT...SE wind 30 kt. Seas 10 ft.
.SAT NIGHT...SW wind 20 kt. Seas 7 ft.
.SUN THROUGH TUE...N wind 15 kt. Seas 7 ft.

$$

PKZ178-251230-
Kiska to Attu-
356 PM AKDT Thu Aug 24 2017

...SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT...

.TONIGHT...E wind 25 kt. Seas 7 ft. Patchy fog.
.FRI...SE wind 30 kt. Seas 11 ft. Areas of fog.
.FRI NIGHT...SE wind 30 kt. Seas 11 ft. Areas of fog. Rain.
.SAT...SW wind 25 kt. Seas 10 ft.
.SAT NIGHT...SW wind 20 kt. Seas 9 ft.
.SUN...SW wind 20 kt. Seas 8 ft.
.MON...NW wind 15 kt. Seas 8 ft.
.TUE...N wind 15 kt. Seas 8 ft.

$$

PKZ179-251230-
Pribilof Islands Near Shore Waters-
356 PM AKDT Thu Aug 24 2017

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...NW wind 25 kt. Seas 8 ft.
.FRI...NW wind 20 kt. Seas 6 ft.
.FRI NIGHT...NW wind 20 kt. Seas 6 ft.
.SAT...NW wind 15 kt. Seas 5 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...E wind 20 kt. Seas 5 ft.
.MON...N wind 20 kt. Seas 6 ft.
.TUE...N wind 25 kt. Seas 5 ft.

$$

PKZ180-251230-
Kuskokwim Delta and Etolin Strait-
356 PM AKDT Thu Aug 24 2017

...SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT...

.TONIGHT...NW wind 30 kt. Seas 11 ft. Rain.
.FRI...NW wind 30 kt. Seas 10 ft.
.FRI NIGHT...NW wind 25 kt. Seas 8 ft.
.SAT AND SAT NIGHT...NW wind 20 kt. Seas 6 ft.
.SUN...NE wind 15 kt. Seas 4 ft.
.MON THROUGH TUE...N wind 20 kt. Seas 4 ft.

$$

PKZ181-251230-
North and West of Nunivak Island-
356 PM AKDT Thu Aug 24 2017

...SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT...

.TONIGHT...N wind 30 kt. Seas 9 ft.
.FRI...N wind 30 kt. Seas 8 ft.
.FRI NIGHT...N wind 25 kt. Seas 8 ft.
.SAT...N wind 25 kt. Seas 7 ft.
.SAT NIGHT...N wind 15 kt. Seas 6 ft.
.SUN...N wind 15 kt. Seas 4 ft.
.MON THROUGH TUE...N wind 25 kt. Seas 6 ft.

$$

PKZ185-251230-
Saint Matthew Island Waters-
356 PM AKDT Thu Aug 24 2017

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TONIGHT...N wind 25 kt E of Saint Matthew Island...NW 15 kt W of
Saint Matthew Island. Seas 6 ft. Patchy fog.
.FRI...N wind 25 kt E of Saint Matthew Island...N 15 kt W of Saint
Matthew Island. Seas 6 ft. Patchy fog.
.FRI NIGHT...N wind 20 kt E of Saint Matthew Island...W 15 kt W of
Saint Matthew Island. Seas 6 ft. Patchy fog.
.SAT...NW wind 20 kt. Seas 4 ft.
.SAT NIGHT...NE wind 20 kt. Seas 4 ft.
.SUN THROUGH MON...N wind 20 kt. Seas 7 ft.
.TUE...N wind 25 kt. Seas 6 ft.

$$

295 
FZAK52 PAFC 251152
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
352 AM AKDT Fri Aug 25 2017

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.

PKZ199-260030-
352 AM AKDT Fri Aug 25 2017
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A 991 mb low near Pilot Point will move southeast across the 
Alaska Peninsula and reform in the Gulf of Alaska by Friday night.
High pressure will continue to build across the central Bering 
and Aleutians while a front moves across the western Aleutians by 
Saturday morning.

$$

PKZ150-260030-
South of the AK Peninsula Sitkinak to Castle Cape-
352 AM AKDT Fri Aug 25 2017

...GALE WARNING TODAY...

.TODAY...W wind 35 kt becoming NW 20 kt in the afternoon. E of
Chirikof Island...W wind 25 kt becoming variable 15 kt in the
afternoon. Seas 14 ft.
.TONIGHT...NW wind 20 kt. Seas 10 ft.
.SAT...W wind 20 kt. Seas 8 ft.
.SAT NIGHT...W wind 15 kt. Seas 6 ft.
.SUN...W wind 15 kt. Seas 4 ft.
.MON THROUGH TUE...N wind 20 kt. Seas 8 ft.

$$

PKZ155-260030-
South of the AK Peninsula Castle Cape to Cape Sarichef-
352 AM AKDT Fri Aug 25 2017

...GALE WARNING TODAY...

.TODAY...NW wind 35 kt. Gusts to 45 kt out of bays and passes.
Seas 12 ft.
.TONIGHT...NW wind 30 kt. Gusts to 40 kt out of bays and passes in
the evening. Seas 10 ft.
.SAT...NW wind 20 kt. Seas 7 ft.
.SAT NIGHT...NW wind 20 kt. Seas 5 ft.
.SUN...SW wind 15 kt. Seas 4 ft.
.MON...N wind 20 kt. Seas 6 ft.
.TUE...NW wind 25 kt. Seas 7 ft.

$$

PKZ160-260030-
Bristol Bay-
352 AM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY TODAY...

.TODAY...N wind 25 kt. Seas 8 ft.
.TONIGHT...NW wind 20 kt. Seas 6 ft.
.SAT...NW wind 15 kt. Seas 5 ft.
.SAT NIGHT...W wind 15 kt. Seas 4 ft.
.SUN...S wind 15 kt. Seas 3 ft.
.MON THROUGH TUE...NE wind 15 kt. Seas 3 ft.

$$

PKZ165-260030-
Port Heiden to Cape Sarichef-
352 AM AKDT Fri Aug 25 2017

...GALE WARNING TODAY...

.TODAY...NW wind 35 kt diminishing to 25 kt in the afternoon.
Seas 13 ft. Rain.
.TONIGHT...NW wind 25 kt. Seas 10 ft.
.SAT...NW wind 20 kt. Seas 7 ft.
.SAT NIGHT...NW wind 15 kt. Seas 6 ft.
.SUN...S wind 15 kt. Seas 4 ft.
.MON...NE wind 20 kt. Seas 5 ft.
.TUE...N wind 20 kt. Seas 5 ft.

$$

PKZ170-260030-
Cape Sarichef to Nikolski Bering Side-
352 AM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY TODAY...

.TODAY...NW wind 25 kt. Seas 8 ft.
.TONIGHT...NW wind 20 kt. Seas 7 ft.
.SAT...NW wind 15 kt. Seas 6 ft.
.SAT NIGHT...W wind 15 kt. Seas 5 ft.
.SUN...SE wind 15 kt. Seas 4 ft.
.MON...N wind 20 kt. Seas 5 ft.
.TUE...NW wind 25 kt. Seas 5 ft.

$$

PKZ171-260030-
Unalaska Bay-
352 AM AKDT Fri Aug 25 2017

.TODAY...NW wind 15 kt. Gusts to 25 kts. Seas 7 ft.
.TONIGHT...NW wind 15 kt. Seas 5 ft.
.SAT...NW wind 15 kt. Seas 5 ft subsiding to 2 ft in the
afternoon.
.SAT NIGHT...W wind 15 kt. Seas 2 ft.
.SUN...SE wind 10 kt. Seas 2 ft.
.MON...N wind 10 kt. Seas 3 ft.
.TUE...NW wind 15 kt. Seas 4 ft.

$$

PKZ172-260030-
Cape Sarichef to Nikolski Pacific Side-
352 AM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...NW wind 25 kt except 15 kt W of Dutch Harbor. Seas 7 ft.
.TONIGHT...NW wind 25 kt except 15 kt W of Dutch Harbor. Seas 6 ft.
.SAT...NW wind 15 kt. Seas 5 ft.
.SAT NIGHT...W wind 15 kt. Seas 4 ft.
.SUN...SE wind 20 kt. Seas 7 ft.
.MON THROUGH TUE...NW wind 25 kt. Seas 9 ft.

$$

PKZ173-260030-
Nikloski to Seguam Island Bering Side-
352 AM AKDT Fri Aug 25 2017

.TODAY...NW wind 15 kt. Seas 6 ft.
.TONIGHT...NW wind 15 kt becoming variable less than 10 kt after
midnight. Seas 5 ft.
.SAT...Variable wind 10 kt. Seas 5 ft.
.SAT NIGHT...S wind 20 kt. Seas 5 ft.
.SUN...SE wind 25 kt. Seas 6 ft.
.MON THROUGH TUE...N wind 20 kt. Seas 6 ft.

$$

PKZ174-260030-
Nikolski to Seguam Island Pacific Side-
352 AM AKDT Fri Aug 25 2017

.TODAY...NW wind 15 kt. Seas 5 ft.
.TONIGHT...NW wind 15 kt. Seas 4 ft.
.SAT...Variable wind 10 kt. Seas 4 ft.
.SAT NIGHT...S wind 15 kt. Seas 5 ft.
.SUN...SE wind 20 kt. Seas 7 ft.
.MON...NW wind 25 kt. Seas 9 ft.
.TUE...NW wind 20 kt. Seas 8 ft.

$$

PKZ175-260030-
Seguam Island to Adak Bering Side-
352 AM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY SATURDAY...

.TODAY...E wind 15 kt. Seas 4 ft. Patchy fog.
.TONIGHT...SE wind 20 kt. Seas 4 ft. Patchy fog.
.SAT...SE wind 25 kt. Seas 5 ft. Patchy fog. Rain.
.SAT NIGHT...SE wind 25 kt. Seas 6 ft.
.SUN...W wind 25 kt. Seas 6 ft.
.MON THROUGH TUE...N wind 20 kt. Seas 6 ft.

$$

PKZ176-260030-
Seguam Island to Adak Pacific Side-
352 AM AKDT Fri Aug 25 2017

.TODAY...E wind 15 kt. Seas 4 ft. Patchy fog.
.TONIGHT...E wind 20 kt. Seas 5 ft. Patchy fog.
.SAT...SE wind 20 kt. Seas 7 ft. Patchy fog. Rain.
.SAT NIGHT...SE wind 25 kt. Seas 8 ft.
.SUN...W wind 20 kt. Seas 8 ft.
.MON THROUGH TUE...NW wind 20 kt. Seas 7 ft.

$$

PKZ177-260030-
Adak to Kiska-
352 AM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY THROUGH SATURDAY...

.TODAY...E wind 15 kt increasing to 25 kt in the afternoon.
Seas 6 ft. Patchy fog.
.TONIGHT...SE wind 30 kt. Seas 8 ft. Areas of fog.
.SAT...SE wind 30 kt. Seas 8 ft. Areas of fog. Rain.
.SAT NIGHT...W wind 20 kt. Seas 7 ft.
.SUN...W wind 15 kt. Seas 7 ft.
.MON THROUGH TUE...N wind 15 kt. Seas 7 ft.

$$

PKZ178-260030-
Kiska to Attu-
352 AM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY THROUGH SATURDAY...

.TODAY...E wind increasing to 30 kt. Seas 8 ft. Areas of fog.
.TONIGHT...SE wind 30 kt. Seas 9 ft. Areas of fog. Rain.
.SAT...SW wind 25 kt. Seas 9 ft. Areas of fog.
.SAT NIGHT...SW wind 20 kt. Seas 10 ft.
.SUN...SW wind 15 kt. Seas 8 ft.
.MON...NW wind 15 kt. Seas 8 ft.
.TUE...N wind 15 kt. Seas 8 ft.

$$

PKZ179-260030-
Pribilof Islands Near Shore Waters-
352 AM AKDT Fri Aug 25 2017

.TODAY...NW wind 20 kt. Seas 6 ft.
.TONIGHT...NW wind 20 kt. Seas 6 ft.
.SAT...NW wind 15 kt. Seas 5 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...E wind 15 kt. Seas 4 ft.
.MON THROUGH TUE...N wind 20 kt. Seas 6 ft.

$$

PKZ180-260030-
Kuskokwim Delta and Etolin Strait-
352 AM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...NW wind 30 kt. Seas 10 ft.
.TONIGHT...NW wind 30 kt diminishing to 20 kt after midnight.
Seas 8 ft.
.SAT...NW wind 20 kt. Seas 6 ft.
.SAT NIGHT...NW wind 20 kt. Seas 5 ft.
.SUN...NW wind 15 kt. Seas 4 ft.
.MON THROUGH TUE...N wind 20 kt. Seas 5 ft.

$$

PKZ181-260030-
North and West of Nunivak Island-
352 AM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY THROUGH SATURDAY...

.TODAY...N wind 25 kt. Seas 8 ft.
.TONIGHT...N wind 25 kt. Seas 7 ft.
.SAT...N wind 25 kt. Seas 6 ft.
.SAT NIGHT...N wind 15 kt. Seas 5 ft.
.SUN...Variable wind 10 kt. Seas 4 ft.
.MON...NE wind 20 kt. Seas 6 ft.
.TUE...N wind 25 kt. Seas 6 ft.

$$

PKZ185-260030-
Saint Matthew Island Waters-
352 AM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY TODAY...

.TODAY...N wind 25 kt E of Saint Matthew Island...variable 10 kt W 
of Saint Matthew Island. Seas 6 ft. Patchy fog.
.TONIGHT...N wind 20 kt E of Saint Matthew Island...SW 10 kt W of
Saint Matthew Island. Seas 6 ft. Patchy fog.
.SAT...N wind 20 kt E of Saint Matthew Island...S 10 kt W of Saint 
Matthew Island. Seas 5 ft. Patchy fog.
.SAT NIGHT...NE wind 20 kt. Seas 4 ft.
.SUN THROUGH MON...NE wind 20 kt. Seas 7 ft.
.TUE...N wind 25 kt. Seas 6 ft.

$$

064 
FZAK52 PAFC 252357
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
357 PM AKDT Fri Aug 25 2017

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.

PKZ199-261230-
357 PM AKDT Fri Aug 25 2017
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A 993 mb low near Sitkinak will weaken to 1004 mb as it moves into 
the Gulf of Alaska Saturday afternoon. High pressure will continue to
build across the central Bering Sea and Aleutians. Low pressure of 
998 mb will form along a front 160 nm south of Nikolski Sunday afternoon.

$$

PKZ150-261230-
South of the AK Peninsula Sitkinak to Castle Cape-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...NW wind 25 kt. Seas 11 ft.
.SAT...W wind 20 kt. Seas 7 ft.
.SAT NIGHT...W wind 15 kt. Seas 5 ft.
.SUN...W wind 15 kt. Seas 4 ft.
.SUN NIGHT...SE wind 15 kt. Seas 3 ft.
.MON...NE wind 35 kt. Seas 13 ft.
.TUE...N wind 30 kt. Seas 13 ft.
.WED...NW wind 15 kt. Seas 6 ft.

$$

PKZ155-261230-
South of the AK Peninsula Castle Cape to Cape Sarichef-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...NW wind 30 kt. Gusts to 40 kt out of bays and passes in
the evening. Seas 10 ft.
.SAT...NW wind 20 kt. Seas 7 ft.
.SAT NIGHT...NW wind 20 kt. Seas 5 ft. Areas of fog.
.SUN...SW wind 20 kt. Seas 4 ft.
.SUN NIGHT...E wind 20 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 8 ft.
.TUE THROUGH WED...NW wind 25 kt. Seas 8 ft.

$$

PKZ160-261230-
Bristol Bay-
357 PM AKDT Fri Aug 25 2017

.TONIGHT...NW wind 20 kt. Seas 6 ft.
.SAT...NW wind 15 kt. Seas 5 ft.
.SAT NIGHT...W wind 15 kt. Seas 4 ft.
.SUN...S wind 15 kt. Seas 3 ft.
.SUN NIGHT...E wind 15 kt. Seas 2 ft.
.MON...NE wind 20 kt. Seas 4 ft.
.TUE...NE wind 25 kt. Seas 6 ft.
.WED...N wind 10 kt. Seas 3 ft.

$$

PKZ165-261230-
Port Heiden to Cape Sarichef-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...NW wind 25 kt. Seas 10 ft.
.SAT...NW wind 20 kt. Seas 7 ft.
.SAT NIGHT...NW wind 15 kt. Seas 6 ft. Areas of fog.
.SUN...W wind 15 kt. Seas 4 ft.
.SUN NIGHT...E wind 15 kt. Seas 2 ft.
.MON...NE wind 20 kt. Seas 4 ft.
.TUE...N wind 25 kt. Seas 7 ft.
.WED...NW wind 20 kt. Seas 6 ft.

$$

PKZ170-261230-
Cape Sarichef to Nikolski Bering Side-
357 PM AKDT Fri Aug 25 2017

.TONIGHT...NW wind 20 kt. Seas 7 ft. Areas of fog.
.SAT...NW wind 15 kt. Seas 6 ft. Areas of fog.
.SAT NIGHT...SE wind 15 kt. Seas 6 ft. Areas of fog.
.SUN AND SUN NIGHT...NE wind 15 kt. Seas 4 ft.
.MON...N wind 15 kt. Seas 4 ft.
.TUE THROUGH WED...NW wind 25 kt. Seas 6 ft.

$$

PKZ171-261230-
Unalaska Bay-
357 PM AKDT Fri Aug 25 2017

.TONIGHT...NW wind 20 kt. Seas 7 ft.
.SAT...NW wind 15 kt. Seas 5 ft subsiding to 2 ft in the afternoon.
.SAT NIGHT...Variable wind less than 10 kt. Seas 3 ft. Areas of fog.
.SUN AND SUN NIGHT...NE wind 10 kt. Seas 2 ft.
.MON...N wind 10 kt. Seas 3 ft.
.TUE THROUGH WED...NW wind 15 kt. Seas 5 ft.

$$

PKZ172-261230-
Cape Sarichef to Nikolski Pacific Side-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...NW wind 25 kt. Seas 6 ft. Areas of fog.
.SAT...NW wind 20 kt. Seas 5 ft.
.SAT NIGHT...SE wind 20 kt. Seas 5 ft. Areas of fog.
.SUN...E wind 25 kt. Seas 7 ft.
.SUN NIGHT...NE wind 25 kt. Seas 8 ft.
.MON...N wind 20 kt. Seas 8 ft.
.TUE THROUGH WED...NW wind 25 kt. Seas 9 ft.

$$

PKZ173-261230-
Nikloski to Seguam Island Bering Side-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY SATURDAY NIGHT...

.TONIGHT...NW wind 15 kt. Seas 5 ft. Areas of fog.
.SAT...NE wind 15 kt becoming SE in the afternoon. Seas 4 ft. Areas 
of fog.
.SAT NIGHT...SE wind 25 kt. Seas 7 ft. Areas of fog.
.SUN...E wind 20 kt. Seas 6 ft.
.SUN NIGHT...NE wind 15 kt. Seas 4 ft.
.MON...N wind 15 kt. Seas 5 ft.
.TUE THROUGH WED...NW wind 20 kt. Seas 5 ft.

$$

PKZ174-261230-
Nikolski to Seguam Island Pacific Side-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY SATURDAY AND SATURDAY NIGHT...

.TONIGHT...NW wind 15 kt. Seas 5 ft. Areas of fog.
.SAT...N wind 15 kt becoming SE 25 kt in the afternoon. Seas 6 ft. Areas
of fog.
.SAT NIGHT...SE wind 25 kt. Seas 8 ft. Areas of fog.
.SUN...NE wind 25 kt. Seas 8 ft.
.SUN NIGHT...N wind 15 kt. Seas 7 ft.
.MON...N wind 15 kt. Seas 6 ft.
.TUE THROUGH WED...NW wind 20 kt. Seas 8 ft.

$$

PKZ175-261230-
Seguam Island to Adak Bering Side-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY SATURDAY AND SATURDAY NIGHT...

.TONIGHT...SE wind 20 kt. Seas 3 ft. Areas of fog.
.SAT...SE wind 30 kt. Seas 6 ft. Areas of fog. Rain.
.SAT NIGHT...S wind 25 kt. Seas 6 ft. Patchy fog.
.SUN...W wind 20 kt. Seas 5 ft.
.SUN NIGHT...NW wind 15 kt. Seas 6 ft.
.MON...NE wind 15 kt. Seas 5 ft.
.TUE THROUGH WED...NW wind 20 kt. Seas 7 ft.

$$

PKZ176-261230-
Seguam Island to Adak Pacific Side-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY SATURDAY AND SATURDAY NIGHT...

.TONIGHT...E wind 20 kt. Seas 5 ft. Areas of fog.
.SAT...SE wind 25 kt. Seas 8 ft. Areas of fog. Rain.
.SAT NIGHT...SW wind 20 kt. Seas 8 ft. Patchy fog. Rain.
.SUN AND SUN NIGHT...W wind 20 kt. Seas 7 ft.
.MON...N wind 15 kt. Seas 6 ft.
.TUE THROUGH WED...NW wind 20 kt. Seas 7 ft.

$$

PKZ177-261230-
Adak to Kiska-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...SE wind 30 kt. Seas 8 ft. Areas of fog.
.SAT...S wind 30 kt becoming SW 20 kt in the afternoon. Seas 8 ft. Patchy
fog. Rain.
.SAT NIGHT...W wind 25 kt. Seas 8 ft. Areas of fog.
.SUN...W wind 20 kt. Seas 8 ft.
.SUN NIGHT...SW wind 15 kt. Seas 7 ft.
.MON...NW wind 15 kt. Seas 6 ft.
.TUE THROUGH WED...NW wind 15 kt. Seas 7 ft.

$$

PKZ178-261230-
Kiska to Attu-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...SE wind 30 kt. Seas 9 ft. Areas of fog. Rain.
.SAT...SW wind 30 kt. Seas 12 ft. Patchy fog.
.SAT NIGHT...SW wind 30 kt. Seas 12 ft. Patchy fog.
.SUN...SW wind 20 kt. Seas 10 ft.
.SUN NIGHT...SW wind 15 kt. Seas 7 ft.
.MON THROUGH WED...N wind 15 kt. Seas 7 ft.

$$

PKZ179-261230-
Pribilof Islands Near Shore Waters-
357 PM AKDT Fri Aug 25 2017

.TONIGHT...NW wind 20 kt. Seas 6 ft.
.SAT...NW wind 15 kt. Seas 5 ft. Areas of fog.
.SAT NIGHT...Variable wind 10 kt. Seas 5 ft. Areas of fog.
.SUN AND SUN NIGHT...Variable wind 10 kt. Seas 4 ft.
.MON...NE wind 20 kt. Seas 5 ft.
.TUE...N wind 25 kt. Seas 6 ft.
.WED...NW wind 20 kt. Seas 6 ft.

$$

PKZ180-261230-
Kuskokwim Delta and Etolin Strait-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...NW wind 30 kt. Seas 8 ft.
.SAT...NW wind 20 kt. Seas 6 ft.
.SAT NIGHT...NW wind 20 kt. Seas 5 ft.
.SUN...NW wind 15 kt. Seas 4 ft.
.SUN NIGHT...SE wind 15 kt. Seas 2 ft.
.MON...NE wind 20 kt. Seas 4 ft.
.TUE...N wind 25 kt. Seas 6 ft.
.WED...N wind 20 kt. Seas 5 ft.

$$

PKZ181-261230-
North and West of Nunivak Island-
357 PM AKDT Fri Aug 25 2017

...SMALL CRAFT ADVISORY THROUGH SATURDAY...

.TONIGHT...N wind 25 kt. Seas 7 ft.
.SAT...N wind 25 kt. Seas 7 ft.
.SAT NIGHT...N wind 15 kt. Seas 5 ft.
.SUN...Variable wind 10 kt. Seas 4 ft.
.SUN NIGHT...Variable wind 10 kt. Seas 3 ft.
.MON...N wind 20 kt. Seas 4 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 6 ft.

$$

PKZ185-261230-
Saint Matthew Island Waters-
357 PM AKDT Fri Aug 25 2017

.TONIGHT...N wind 20 kt E of Saint Matthew Island...W 15 kt W of
Saint Matthew Island. Seas 6 ft. Areas of fog.
.SAT...E of Saint Matthew Island, N wind 20 kt. W of Saint Matthew
Island, variable wind 10 kt becoming S 15 kt in the afternoon.
Seas 5 ft. Areas of fog.
.SAT NIGHT...NE wind 15 kt. Seas 4 ft. Areas of fog.
.SUN AND SUN NIGHT...NE wind 15 kt. Seas 5 ft.
.MON...NE wind 20 kt. Seas 5 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 6 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
426 PM AKDT Wed Aug 23 2017

.ANALYSIS AND UPPER LEVELS...
Upper levels show a longwave trough over the main portion of the
state with a lobe extending into the Bering Sea, where an upper
level low is moving slowly eastward. Satellites show that this
system is well developed, with a broad cirrus shield beginning to
slide over the Copper River Basin and Southcentral. At the
surface, radar shows showers moving through southwest Alaska just
ahead of the front. Upper level jet support in the form of a jet
streak moving south into the base of the trough is aiding the low
to strengthen as it moves eastward, which is reflected in near
Gale Force winds in the Central Aleutians.

&&

.MODEL DISCUSSION...
Models are in good agreement on low placement, although the 12z
NAM was slow on moving the front into Southcentral. Model data
also shows increased wind speeds in the west around the low center
as the low gains upper level support. In the west, a NAM/GFS blend
was chosen to increase speeds across the area, while in the east,
NAM was chosen for wind strength but timing was adjusted to match
current observations.

&&

.AVIATION...
PANC...Timing on the Turnagain Arm wind and downsloping remains
the big questions for today. The gradient looks to increase in the
afternoon as the front approaches the west, so am increasing the
winds even more after 06z. This should also impact -SHRA moving
over the airport as conditions will dry during the strongest
Turnagain winds. Cigs are dropping in SW flow ahead of the front,
and are not expected to hit MVFR conditions, but may cross the 050
ft mark which will impact airport ops. If southeasterly flow picks
up earlier ahead of the front, cigs may not drop at 00z and
showers will be negligible.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2)...
A very typical late-summer storm is taking shape which will bring
widespread rain and wind to Southcentral Alaska and the Gulf of
Alaska the next couple days (with the notable exception of the
Copper River Basin which will be much drier). A leading upper
level wave combined with instability in the lower to mid levels
is bringing showers to some areas this afternoon, particularly
south to west facing slopes which are benefiting from low level
upslope flow. A neutrally tilted short-wave trough over the
eastern Bering Sea will become negatively tilted as it enters the
western Gulf tonight, leading to development of widespread steady
rain. The mean low level flow will gradually back toward the
southeast and strengthen out ahead of a surface frontal system.
This often results in downslope drying from the western Kenai to
Anchorage and the Mat Valley. However, with strong upward vertical
motion, a more southerly component to mid level flow, and a bit
of remaining instability expect rain to fall in all of these
areas.

As the front makes its way toward the north Gulf coast a barrier
jet will form, bringing high end gale force winds to the immediate
coast. The northward progression of the front will rapidly stall
on Thursday as the upper-level short-wave trough rotates back
westward toward a new upper level low dropping into Bristol Bay.
Thus, expect the strongest winds to remain over southern Prince
William Sound (near interface with the Gulf). The approaching
front will also kick up wind through Turnagain Arm. Ageostrophic
flow will favor stronger winds in western Turnagain Arm tonight
while geostrophic flow will favor stronger winds through Portage
Valley/Eastern Turnagain Arm as the front arrives Thursday
afternoon.

The heaviest rain will fall in western Prince William Sound thanks
to persistent strong east to southeast low level flow, with 3 to 6
inches of rain possible through Friday afternoon. Do not expect
any flooding problems, though there will be some decent rises in
small streams of the eastern Kenai Peninsula. Rain will break up
into showers for inland areas Thursday afternoon as a now
vertically stacked low moves from Bristol Bay into the Gulf and
upper level flow becomes more easterly. The bulk of rain will then
remain along the Gulf coastal areas through Friday, with a chance
of showers over the rest of the area as weak upper waves head
inland.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2)...
Fairly straightforward with rain moving in with the low entering
Bristol Bay. The rain will being to turn more showery Friday into
Friday night with the low moving farther east in bringing in
northerly flow on Saturday. This northerly flow will not be
sufficient to dry out the area and the upper level trough
remaining over Southwest mainland Alaska will keep showers in the
area into the weekend.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2)...
The Western and Central Bering Sea will have high pressure
building over them Thursday and then another low will enter the
Western Bering leaving the ridge over the Central Bering. This
will bring areas of low clouds and fog in the these areas under
the ridge as typically happens. The Eastern Bering Sea will see
marine Gale force winds develop between the low in Bristol Bay and
the ridge in the Central Bering Sea.

&&

.LONG TERM FORECAST (Days 4 through 7)...

Beginning the extended period forecast Saturday night, there will
be a small upper level low somewhere in the vicinity of eastern
Bristol Bay and the Alaska Peninsula with a departing weak
shortwave trough moving east toward the Yukon. There will be weak
upper level ridging over the northwest Bering Sea with an
undercutting Pacific jet stream crossing the Aleutian Chain.
Showers will mainly be impacting the Southcentral region with
drier air filtering over Southwest Alaska. A very brief drier
period will develop Monday as upper level heights build over
Alaska ahead of a deepening North Pacific low. Complex wave
mergers throw quite a bit of uncertainty in the overall forecast
of the low track, but it looks like a rather impressive surface
low will eventually develop and move north toward Kodiak Island
and the Alaska Peninsula region Monday night into Tuesday. With a
strong Northeast Pacific ridge axis in place, this low will have a
lot of potential for amplification along with heavy coastal rain
and strong winds. Expect rain to also impact most interior
locations Tuesday and Wednesday given the amount of moisture most
of the global models are progging. A lot of details remain
uncertain at this time, but the general idea is to expect a
dramatic uptick in wet weather along with potential higher impacts
to coastal regions. Stay tuned.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...NONE.
MARINE...NONE.
FIRE WEATHER...NONE.

&&

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