Storm Warning 51, NWS Anchorage, AK

673 
FZAK52 PAFC 260018
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
318 PM AKST Sun Feb 25 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.

PKZ199-261300-
318 PM AKST Sun Feb 25 2018
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A 980 mb low 310 nm West of St Paul Island moves inland 35 nm
Southeast of Hooper Bay at 981 mb Mon morning with its front into
Western Alaska by Midday Monday. A 1004 mb low and front 420 nm 
Southwest of Attu moves across Bristol Bay into the Gulf of 
Alaska for Tue Afternoon. A 963 mb North Pacific low moves to 260 
nm Southwest of Attu at 949 mb Tue afternoon.

$$

PKZ150-261300-
South of the AK Peninsula Sitkinak to Castle Cape-
318 PM AKST Sun Feb 25 2018

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...SW wind 30 kt becoming W 45 kt after midnight. Seas
14 ft.
.MON...W wind 45 kt with gusts to 60 kt. Seas 19 ft.
.MON NIGHT...W wind 40 kt diminishing to 30 kt after midnight.
Seas 17 ft subsiding to 12 ft after midnight. Rain showers.
.TUE...NW wind 35 kt. Seas 15 ft.
.TUE NIGHT...NW wind 30 kt. Seas 13 ft.
.WED...NW wind 30 kt. Seas 10 ft.
.THU...S wind 15 kt. Seas 7 ft.
.FRI...E wind 15 kt. Seas 7 ft.

$$

PKZ155-261300-
South of the AK Peninsula Castle Cape to Cape Sarichef-
318 PM AKST Sun Feb 25 2018

...GALE WARNING THROUGH MONDAY...

.TONIGHT...W wind 35 kt increasing to 45 kt after midnight. Seas
16 ft.
.MON...W wind 45 kt. Seas 17 ft.
.MON NIGHT...W wind 30 kt. Seas 13 ft.
.TUE...NW wind 30 kt. Seas 14 ft.
.TUE NIGHT...NW wind 25 kt. Seas 8 ft.
.WED...SW wind 25 kt. Seas 9 ft.
.THU...S wind 25 kt. Seas 10 ft.
.FRI...N wind 15 kt. Seas 8 ft.

$$

PKZ160-261300-
Bristol Bay-
318 PM AKST Sun Feb 25 2018

...STORM WARNING MONDAY...

.TONIGHT...SW wind 35 kt increasing to 45 kt after midnight. Seas
10 ft building to 16 ft after midnight. Widespread snow showers.
.MON...SW wind 50 kt. Seas 23 ft.
.MON NIGHT...W wind 35 kt diminishing to 15 kt after midnight.
Seas 16 ft subsiding to 8 ft after midnight. Freezing spray.
.TUE...NW wind 30 kt. Seas 9 ft.
.TUE NIGHT...NW wind 25 kt. Seas 9 ft.
.WED...NE wind 20 kt. Seas 7 ft.
.THU...E wind 20 kt. Seas 4 ft.
.FRI...NE wind 15 kt. Seas 4 ft.

$$

PKZ165-261300-
Port Heiden to Cape Sarichef-
318 PM AKST Sun Feb 25 2018

...STORM WARNING THROUGH MONDAY...

.TONIGHT...SW wind 50 kt. Gusts to 65 kt after midnight. Seas 20 ft 
building to 32 ft after midnight. From Port Moller E, seas 15 ft 
building to 24 ft after midnight.
.MON...W wind 50 kt diminishing to 35 kt in the afternoon. From
Port Moller E, W wind 50 kt. Seas 33 ft subsiding to 27 ft in the 
afternoon.
.MON NIGHT...W wind 30 kt. Seas 17 ft. Widespread snow and rain 
showers.
.TUE...NW wind 30 kt. Seas 13 ft.
.TUE NIGHT...W wind 25 kt. Seas 11 ft.
.WED THROUGH THU...SE wind 25 kt. Seas 8 ft.
.FRI...NW wind 15 kt. Seas 7 ft.

$$

PKZ170-261300-
Cape Sarichef to Nikolski Bering Side-
318 PM AKST Sun Feb 25 2018

...GALE WARNING THROUGH MONDAY...

.TONIGHT...W wind 45 kt. Gusts to 60 kt after midnight. Seas 27 ft 
building to 33 ft after midnight.
.MON...W wind 45 kt becoming SW 30 kt in the afternoon. Seas 32 ft
subsiding to 24 ft in the afternoon. Rain and snow.
.MON NIGHT...SW wind 30 kt. Seas 16 ft. Rain and snow showers.
.TUE...NW wind 25 kt. Seas 12 ft.
.TUE NIGHT...S wind 30 kt. Seas 8 ft.
.WED...SE wind 30 kt. Seas 10 ft.
.THU...SW wind 30 kt. Seas 10 ft.
.FRI...NW wind 15 kt. Seas 9 ft.

$$

PKZ171-261300-
Unalaska Bay-
318 PM AKST Sun Feb 25 2018

...GALE WARNING THROUGH MONDAY...

.TONIGHT...SW wind 30 kt becoming W 40 kt after midnight. Seas 5
ft.
.MON...W wind 35 kt becoming SW 20 kt in the afternoon. Seas 5 ft
subsiding to 3 ft in the afternoon.
.MON NIGHT...SW wind 25 kt. Seas 4 ft. Snow and rain.
.TUE...NW wind 20 kt. Seas 5 ft.
.TUE NIGHT...S wind 20 kt. Seas 2 ft.
.WED...SE wind 20 kt. Seas 3 ft.
.THU...W wind 15 kt. Seas 3 ft.
.FRI...NW wind 15 kt. Seas 5 ft.

$$

PKZ172-261300-
Cape Sarichef to Nikolski Pacific Side-
318 PM AKST Sun Feb 25 2018

...GALE WARNING THROUGH MONDAY...

.TONIGHT...W wind 40 kt. Seas 17 ft.
.MON...W wind 35 kt becoming SW 25 kt in the afternoon. Seas 16
ft.
.MON NIGHT...SW wind 30 kt. Seas 12 ft.
.TUE...NW wind 25 kt. Seas 11 ft.
.TUE NIGHT...S wind 25 kt. Seas 8 ft.
.WED...S wind 30 kt. Seas 12 ft.
.THU...W wind 25 kt. Seas 12 ft.
.FRI...NW wind 20 kt. Seas 7 ft.

$$

PKZ173-261300-
Nikloski to Seguam Island Bering Side-
318 PM AKST Sun Feb 25 2018

...GALE WARNING TONIGHT...

.TONIGHT...W wind 45 kt. Seas 29 ft.
.MON...SW wind 30 kt. Seas 24 ft subsiding to 16 ft in the
afternoon. Rain.
.MON NIGHT...W wind 30 kt. Seas 14 ft.
.TUE...E wind 20 kt. Seas 12 ft.
.TUE NIGHT...SE wind 35 kt. Seas 11 ft.
.WED...S wind 35 kt. Seas 14 ft.
.THU THROUGH FRI...W wind 20 kt. Seas 11 ft.

$$

PKZ174-261300-
Nikolski to Seguam Island Pacific Side-
318 PM AKST Sun Feb 25 2018

...GALE WARNING TONIGHT...

.TONIGHT...W wind 35 kt. Seas 19 ft.
.MON...SW wind 30 kt. Seas 17 ft.
.MON NIGHT...SW wind 30 kt. Seas 13 ft.
.TUE...SW wind 20 kt. Seas 11 ft.
.TUE NIGHT...SE wind 30 kt. Seas 11 ft.
.WED...S wind 30 kt. Seas 16 ft.
.THU...W wind 20 kt. Seas 13 ft.
.FRI...NW wind 20 kt. Seas 9 ft.

$$

PKZ175-261300-
Seguam Island to Adak Bering Side-
318 PM AKST Sun Feb 25 2018

...STORM WARNING TONIGHT...

.TONIGHT...W wind 50 kt becoming SW 40 kt after midnight. Seas
28 ft.
.MON...SW wind 30 kt. Seas 17 ft. Rain.
.MON NIGHT...SW wind 30 kt. Seas 15 ft.
.TUE...SE wind 30 kt. Seas 9 ft.
.TUE NIGHT...SE wind 45 kt. Seas 13 ft.
.WED...S wind 35 kt. Seas 13 ft.
.THU...SW wind 25 kt. Seas 12 ft.
.FRI...W wind 20 kt. Seas 10 ft.

$$

PKZ176-261300-
Seguam Island to Adak Pacific Side-
318 PM AKST Sun Feb 25 2018

...GALE WARNING TONIGHT...

.TONIGHT...W wind 35 kt. Seas 20 ft.
.MON...SW wind 30 kt. Seas 14 ft.
.MON NIGHT...W wind 30 kt. Seas 14 ft.
.TUE...S wind 30 kt. Seas 11 ft.
.TUE NIGHT...SE wind 40 kt. Seas 16 ft.
.WED...S wind 35 kt. Seas 18 ft.
.THU...W wind 20 kt. Seas 15 ft.
.FRI...W wind 20 kt. Seas 9 ft.

$$

PKZ177-261300-
Adak to Kiska-
318 PM AKST Sun Feb 25 2018

...GALE WARNING THROUGH MONDAY...

.TONIGHT...SW wind 40 kt diminishing to 30 kt after midnight. Seas
22 ft subsiding to 15 ft after midnight. Rain and snow.
.MON...SW wind 35 kt. Seas 17 ft. Snow and rain.
.MON NIGHT...W wind 30 kt diminishing to 20 kt after midnight.
Seas 16 ft.
.TUE...SE wind 45 kt. Seas 18 ft.
.TUE NIGHT...S wind 45 kt. Seas 24 ft.
.WED...SW wind 35 kt. Seas 23 ft.
.THU...SW wind 25 kt. Seas 17 ft.
.FRI...SW wind 30 kt. Seas 14 ft.

$$

PKZ178-261300-
Kiska to Attu-
318 PM AKST Sun Feb 25 2018

...GALE WARNING MONDAY...

.TONIGHT...SW wind 30 kt. Seas 17 ft. Snow and rain.
.MON...W wind 35 kt. Seas 18 ft. Snow.
.MON NIGHT...W wind 25 kt becoming S after midnight. Seas 16 ft
subsiding to 11 ft after midnight.
.TUE...E wind 50 kt. Seas 25 ft.
.TUE NIGHT...S wind 55 kt. Seas 45 ft.
.WED...SW wind 50 kt. Seas 35 ft.
.THU...SW wind 30 kt. Seas 18 ft.
.FRI...S wind 30 kt. Seas 22 ft.

$$

PKZ179-261300-
Pribilof Islands Near Shore Waters-
318 PM AKST Sun Feb 25 2018

...STORM WARNING TONIGHT...

.TONIGHT...SW wind 50 kt. Seas 36 ft. Widespread snow and rain
showers.
.MON...W wind 35 kt diminishing to 25 kt in the afternoon. Seas
31 ft subsiding to 18 ft in the afternoon. Snow.
.MON NIGHT...NW wind 20 kt. Seas 12 ft.
.TUE...W wind 25 kt. Seas 11 ft.
.TUE NIGHT...S wind 25 kt. Seas 10 ft.
.WED...SE wind 30 kt. Seas 14 ft.
.THU...SW wind 25 kt. Seas 12 ft.
.FRI...W wind 15 kt. Seas 10 ft.

$$

PKZ180-261300-
Kuskokwim Delta and Etolin Strait-
318 PM AKST Sun Feb 25 2018

...GALE WARNING THROUGH MONDAY...

.TONIGHT...SW wind 45 kt. Gusts to 60 kt after midnight south of 
Cape Newenham. Seas 15 ft building to 21 ft after midnight. Freezing 
spray. Widespread snow showers.
.MON...W wind 45 kt. Gusts to 60 kt in the morning south of Cape 
Newenham. Seas 24 ft.
.MON NIGHT...W wind 25 kt. Seas 14 ft subsiding to 9 ft after
midnight. Freezing spray.
.TUE...NW wind 30 kt. Seas 10 ft.
.TUE NIGHT...W wind 25 kt. Seas 10 ft.
.WED THROUGH THU...SE wind 30 kt. Seas 11 ft.
.FRI...NE wind 15 kt. Seas 6 ft.

$$

PKZ181-261300-
North and West of Nunivak Island-
318 PM AKST Sun Feb 25 2018

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...SE wind 30 kt becoming NW after midnight. Seas in ice
free waters 13 ft. Freezing spray. Snow.
.MON...NW wind 30 kt. Seas in ice free waters 13 ft. Freezing
spray.
.MON NIGHT...W wind 25 kt. Seas in ice free waters 8 ft. Freezing
spray.
.TUE...NW wind 25 kt. Seas in ice free waters 8 ft.
.TUE NIGHT...W wind 20 kt. Seas in ice free waters 7 ft.
.WED THROUGH THU...SE wind 30 kt. Seas in ice free waters 12 ft.
.FRI...SE wind 15 kt. Seas in ice free waters 6 ft.

$$

PKZ185-261300-
Saint Matthew Island Waters-
318 PM AKST Sun Feb 25 2018

...GALE WARNING TONIGHT...

.TONIGHT...NE wind 35 kt. Seas 19 ft. Freezing spray. Snow.
.MON...NW wind 30 kt E of Saint Matthew Island... NW 20 kt W of
Saint Matthew Island. Seas 18 ft subsiding to 13 ft in the
afternoon. Freezing spray.
.MON NIGHT...W wind 25 kt. Seas 10 ft. Freezing spray.
.TUE...W wind 25 kt. Seas 10 ft.
.TUE NIGHT...S wind 35 kt. Seas 10 ft.
.WED...SE wind 35 kt. Seas 22 ft.
.THU...S wind 30 kt. Seas 21 ft.
.FRI...SW wind 20 kt. Seas 14 ft.

$$

253 
FZAK52 PAFC 261250
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
350 AM AKST Mon Feb 26 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.

PKZ199-270145-
350 AM AKST Mon Feb 26 2018
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 1004 mb low 160 nm west of Shemya moves inland near Egegik at 
999 mb by Tue morning. A 954 mb low 390 nm southwest of Shemya Tue 
morning moves to 230 nm northwest of Shemya at 950 mb by Wed morning.

$$

PKZ150-270145-
South of the AK Peninsula Sitkinak to Castle Cape-
350 AM AKST Mon Feb 26 2018

...GALE WARNING THROUGH TUESDAY...

.TODAY...W wind 45 kt. Seas 20 ft.
.TONIGHT...W wind 40 kt becoming SW 30 kt after midnight. Seas 17
ft subsiding to 12 ft after midnight.
.TUE...NW wind 40 kt. Seas 16 ft.
.TUE NIGHT...NW wind 35 kt. Seas 14 ft.
.WED...NW wind 30 kt. Seas 10 ft.
.THU...SW wind 15 kt. Seas 7 ft.
.FRI...E wind 15 kt. Seas 7 ft.

$$

PKZ155-270145-
South of the AK Peninsula Castle Cape to Cape Sarichef-
350 AM AKST Mon Feb 26 2018

...GALE WARNING THROUGH TUESDAY...

.TODAY...W wind 45 kt. Seas 17 ft.
.TONIGHT...W wind 35 kt. Seas 13 ft.
.TUE...NW wind 35 kt. Seas 14 ft.
.TUE NIGHT...NW wind 25 kt. Seas 9 ft.
.WED...S wind 30 kt. Seas 8 ft.
.THU...SE wind 30 kt. Seas 10 ft.
.FRI...N wind 30 kt. Seas 8 ft.

$$

PKZ160-270145-
Bristol Bay-
350 AM AKST Mon Feb 26 2018

...STORM WARNING TODAY...

.TODAY...SW wind increasing to 50 kt. Seas 23 ft.
.TONIGHT...W wind 30 kt becoming SW 20 kt after midnight. Seas 14
ft subsiding to 8 ft after midnight. Freezing spray.
.TUE...NW wind 30 kt. Seas 11 ft. Freezing spray.
.TUE NIGHT...NW wind 25 kt. Seas 9 ft.
.WED...NE wind 20 kt. Seas 6 ft.
.THU...E wind 20 kt. Seas 4 ft.
.FRI...N wind 10 kt. Seas 4 ft.

$$

PKZ165-270145-
Port Heiden to Cape Sarichef-
350 AM AKST Mon Feb 26 2018

...STORM WARNING TODAY...

.TODAY...W wind 50 kt with gusts to 65 kt diminishing to 35 kt in 
the afternoon. Seas 33 ft subsiding to 24 ft in the afternoon.
.TONIGHT...SW wind 30 kt. Seas 17 ft. Snow.
.TUE...NW wind 30 kt. Seas 14 ft.
.TUE NIGHT...NW wind 25 kt. Seas 11 ft.
.WED THROUGH THU...SE wind 30 kt. Seas 7 ft.
.FRI...N wind 20 kt. Seas 8 ft.

$$

PKZ170-270145-
Cape Sarichef to Nikolski Bering Side-
350 AM AKST Mon Feb 26 2018

...GALE WARNING TODAY...

.TODAY...W wind 45 kt with gusts to 60 kt becoming SW 30 kt in the 
afternoon. Seas 32 ft subsiding to 22 ft in the afternoon. Rain.
.TONIGHT...SW wind 30 kt. Seas 16 ft. Snow and rain.
.TUE...NW wind 20 kt. Seas 12 ft.
.TUE NIGHT...S wind 25 kt. Seas 9 ft.
.WED...SE wind 35 kt. Seas 11 ft.
.THU...W wind 35 kt. Seas 11 ft.
.FRI...NW wind 25 kt. Seas 9 ft.

$$

PKZ171-270145-
Unalaska Bay-
350 AM AKST Mon Feb 26 2018

...GALE WARNING TODAY...

.TODAY...W wind 35 kt becoming SW 20 kt in the afternoon. Seas 5
ft subsiding to 2 ft in the afternoon.
.TONIGHT...SW wind 25 kt. Seas 4 ft.  and rain showers.
.TUE...NW wind 20 kt diminishing to 10 kt in the afternoon. Seas
5 ft subsiding to 3 ft in the afternoon.
.TUE NIGHT...SE wind 15 kt. Seas 3 ft.
.WED...SE wind 25 kt. Seas 4 ft.
.THU...NW wind 20 kt. Seas 3 ft.
.FRI...NW wind 15 kt. Seas 5 ft.

$$

PKZ172-270145-
Cape Sarichef to Nikolski Pacific Side-
350 AM AKST Mon Feb 26 2018

...GALE WARNING TODAY...

.TODAY...W wind 35 kt becoming SW 25 kt in the afternoon. Seas
16 ft.
.TONIGHT...SW wind 30 kt. Seas 13 ft.
.TUE...NW wind 25 kt diminishing to 15 kt in the afternoon. Seas
11 ft.
.TUE NIGHT...SE wind 25 kt. Seas 7 ft.
.WED...SE wind 30 kt. Seas 15 ft.
.THU...NW wind 30 kt. Seas 15 ft.
.FRI...NW wind 25 kt. Seas 7 ft.

$$

PKZ173-270145-
Nikloski to Seguam Island Bering Side-
350 AM AKST Mon Feb 26 2018

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 30 kt. Seas 22 ft subsiding to 16 ft in the
afternoon.
.TONIGHT...W wind 30 kt. Seas 14 ft.
.TUE...NW wind 15 kt becoming SE in the afternoon. Seas 11 ft.
.TUE NIGHT...SE wind 35 kt. Seas 10 ft.
.WED...S wind 35 kt. Seas 15 ft.
.THU THROUGH FRI...W wind 25 kt. Seas 11 ft.

$$

PKZ174-270145-
Nikolski to Seguam Island Pacific Side-
350 AM AKST Mon Feb 26 2018

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 30 kt. Seas 17 ft.
.TONIGHT...SW wind 30 kt. Seas 13 ft.
.TUE...NW wind 20 kt becoming SE in the afternoon. Seas 11 ft.
.TUE NIGHT...SE wind 30 kt. Seas 11 ft.
.WED...S wind 30 kt. Seas 15 ft.
.THU...W wind 25 kt. Seas 14 ft.
.FRI...W wind 25 kt. Seas 9 ft.

$$

PKZ175-270145-
Seguam Island to Adak Bering Side-
350 AM AKST Mon Feb 26 2018

...GALE WARNING TONIGHT...

.TODAY...SW wind 30 kt. Seas 16 ft.
.TONIGHT...SW wind 35 kt becoming W 25 kt after midnight. Seas
14 ft.
.TUE...SE wind 15 kt increasing to 30 kt in the afternoon. Seas
9 ft.
.TUE NIGHT...SE wind 40 kt. Seas 12 ft.
.WED...SW wind 35 kt. Seas 13 ft.
.THU...SW wind 25 kt. Seas 12 ft.
.FRI...SW wind 35 kt. Seas 11 ft.

$$

PKZ176-270145-
Seguam Island to Adak Pacific Side-
350 AM AKST Mon Feb 26 2018

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 30 kt. Seas 14 ft.
.TONIGHT...W wind 30 kt. Seas 14 ft.
.TUE...S wind 20 kt becoming SE 30 kt in the afternoon. Seas 11
ft.
.TUE NIGHT...SE wind 40 kt. Seas 16 ft.
.WED...SW wind 35 kt. Seas 17 ft.
.THU...SW wind 25 kt. Seas 16 ft.
.FRI...SW wind 30 kt. Seas 15 ft.

$$

PKZ177-270145-
Adak to Kiska-
350 AM AKST Mon Feb 26 2018

...GALE WARNING TODAY AND TUESDAY...

.TODAY...SW wind 35 kt. Seas 17 ft. Snow and rain.
.TONIGHT...W wind 30 kt diminishing to 15 kt after midnight. Seas
17 ft.
.TUE...SE wind 35 kt increasing to 45 kt in the afternoon. Seas 9
ft building to 16 ft in the afternoon. Rain.
.TUE NIGHT...S wind 40 kt. Seas 20 ft.
.WED THROUGH THU...SW wind 30 kt. Seas 20 ft.
.FRI...S wind 45 kt. Seas 18 ft.

$$

PKZ178-270145-
Kiska to Attu-
350 AM AKST Mon Feb 26 2018

...STORM WARNING TUESDAY...

.TODAY...NW wind 40 kt Pacific side. Bering side, E wind 20 kt 
becoming NW in the afternoon. Seas 19 ft.
.TONIGHT...W wind 25 kt becoming SE 20 kt after midnight. Seas 15 
ft.
.TUE...E wind 40 kt becoming SE 55 kt in the afternoon. Seas 13 ft
building to 24 ft in the afternoon. Snow with rain.
.TUE NIGHT...S wind 55 kt. Seas 41 ft.
.WED...SW wind 55 kt. Seas 35 ft.
.THU...SW wind 30 kt. Seas 19 ft.
.FRI...S wind 45 kt. Seas 27 ft.

$$

PKZ179-270145-
Pribilof Islands Near Shore Waters-
350 AM AKST Mon Feb 26 2018

...GALE WARNING TODAY...

.TODAY...W wind 35 kt with gusts to 50 kt becoming SW 20 kt in the 
afternoon. Seas 28 ft subsiding to 18 ft in the afternoon. Snow.
.TONIGHT...NW wind 25 kt. Seas 12 ft.
.TUE...W wind 30 kt diminishing to 20 kt in the afternoon. Seas
11 ft.
.TUE NIGHT...S wind 25 kt. Seas 9 ft.
.WED...SE wind 35 kt. Seas 16 ft.
.THU...SW wind 30 kt. Seas 14 ft.
.FRI...SW wind 25 kt. Seas 10 ft.

$$

PKZ180-270145-
Kuskokwim Delta and Etolin Strait-
350 AM AKST Mon Feb 26 2018

...STORM WARNING TODAY...
...HEAVY FREEZING SPRAY WARNING TUESDAY...

.TODAY...W wind 50 kt diminishing to 40 kt in the afternoon. N of
Cape Newenham, NW wind 35 kt. Seas 24 ft. Freezing spray N of
Cape Newenham in the morning.
.TONIGHT...W wind 25 kt. Seas 13 ft. Freezing spray.
.TUE...W wind 30 kt. Seas 11 ft. Heavy freezing spray N of Cape
Newenham in the morning.
.TUE NIGHT...NW wind 25 kt. Seas 9 ft.
.WED THROUGH THU...S wind 35 kt. Seas 11 ft.
.FRI...W wind 15 kt. Seas 6 ft.

$$

PKZ181-270145-
North and West of Nunivak Island-
350 AM AKST Mon Feb 26 2018

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

.TODAY...NW wind 30 kt. Seas in ice free waters 13 ft. Freezing
spray.
.TONIGHT...W wind 25 kt. Seas in ice free waters 9 ft. Heavy
freezing spray.
.TUE...NW wind 25 kt. Seas in ice free waters 8 ft. Heavy freezing
spray in the morning.
.TUE NIGHT...W wind 20 kt. Seas in ice free waters 6 ft.
.WED...SE wind 40 kt. Seas in ice free waters 12 ft.
.THU...S wind 35 kt. Seas in ice free waters 12 ft.
.FRI...S wind 20 kt. Seas in ice free waters 6 ft.

$$

PKZ185-270145-
Saint Matthew Island Waters-
350 AM AKST Mon Feb 26 2018

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

.TODAY...NW wind 30 kt E of Saint Matthew Island...W 25 kt W of
Saint Matthew Island. Seas 18 ft subsiding to 13 ft in the
afternoon. Heavy freezing spray N of Saint Matthew Island.
.TONIGHT...W wind 25 kt. Seas 10 ft. Heavy freezing spray N of Saint
Matthew Island.
.TUE...W wind 25 kt diminishing to 15 kt in the afternoon. Seas 10 
ft. Heavy freezing spray N of Saint Matthew Island. 
.TUE NIGHT...S wind 35 kt. Seas 9 ft.
.WED...SE wind 40 kt. Seas 21 ft.
.THU...S wind 35 kt. Seas 21 ft.
.FRI...S wind 30 kt. Seas 14 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
425 PM AKST Sat Feb 24 2018

.ANALYSIS AND UPPER LEVELS...
The upper level short-wave and associated surface low which
brought another round of light snow to most of Southcentral
last night through this morning is exiting eastward across the
Gulf. Cold air advection is leading to strengthening gap winds
along the Gulf coast. Winds are particularly strong across the
western Gulf/Kodiak Island thanks to steep low level lapse rates
(7 to 8 degrees C/km on the 12Z Kodiak sounding), with stronger
winds mixing down from aloft. This unstable airmass extends back
westward into the eastern Bering Sea, Bristol Bay, and along the
Alaska Peninsula, where gusty winds and snow showers prevail.
Weak troughing persists across the rest of Southwest Alaska,
with a few lingering showers.

The next in a series of progressive storm systems is approaching
the Aleutians. A leading warm front is leading to quickly warming
low level temperatures, with rain overspreading the western and
central Aleutians.

&&

.MODEL DISCUSSION...
Models remain in good agreement and forecast confidence is
generally high over the next couple days.

&&

.AVIATION...
PANC...In the wake of today's snow, there may be some localized
areas of fog or stratus (IFR conditions) in the vicinity of the
terminal. However, with increasing low level flow this evening it
does not look favorable for anything widespread or long-lived to
develop. Thus, have trended toward VFR conditions this evening.
The low level winds will weaken by Sunday morning, so will have
to watch for fog formation if we begin to cool down under clear
skies. For now, that is a low probability possibility and have
stuck with VFR conditions through Sunday afternoon.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2)...
A drying trend will continue overnight as leftover snow flurries
and showers come to an end. This will be in response to increasing
weak cold air advection and dry northwesterly offshore flow. A
strong upper jet will also continue to support strong westerly
offshore through southern Cook Inlet into Homer and Kodiak Island.
Sunday will be dry and quiet with attention quickly turning to
another low which will move into Cook Inlet from the west. This
will bring another shot of snow to Southcentral Sunday night
through Monday night. Currently, this snow event is looking to be
a more typical distribution which will favor the west facing
slopes of all the high mountain ranges. With rather high snow
ratios and favorable dynamics, this snow event may reach close to
advisory level snow amounts (although over a 24 hour period) for
some locations from Anchorage north to the Matanuska Valley. Snow
will quickly taper off Monday night, lingering longest near the
mountains.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2: Sunday and
Monday)...
Quiet weather is returning to Southwest Alaska for another brief
time between systems as weak high pressure moves over the area.
With onshore flow over portions of Bristol Bay, especially from
King Salmon south and through the Kuskokwim Delta, patchy dense
fog is possible in some areas tonight. Then on Sunday, the next
system moves into Southwest Alaska, as a portion occluded front to
the north, and warm front to the south, with the parent low
remaining over the Bering. This will bring yet another round of a
few inches of snow to all of Southwest Alaska overnight Sunday
night. For the upslope mountains, which will be the west sides of
the Kuskokwim and Alaska Ranges, amounts closer to a foot are
expected with this latest round of snow. Colder air moves in on
increasingly strong west to northwest flow during the day Monday,
resulting in an anti-diurnal temperature trend with the high
temperatures for the day expected early in the morning, then
falling throughout the day into Monday night. Because of the
strong northwest flow, snow showers will continue in the mountains
through much of the day, potentially continuing through much of
Monday night, since the flow off the Bering is expected to be
well-modified with moisture.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2: Sunday
and Monday)...
A strong area of low pressure is moving into the western
Aleutians this afternoon. It is bringing another round of warm air
east of the low's center. The most hazardous weather associated
with the low will be after the center passes and the colder south
and west side of the low moves into the area. Very strong winds on
cold advection are expected tonight across the western and
central Aleutians. Fortunately, the low itself is not expected to
get very strong, only getting to about 980 mb at it's strongest
point during the day Sunday. Thus, only occasional gusts to
hurricane force are expected along the Aleutians late tonight into
Sunday, though sustained winds to storm force (50 kt) will be
more widespread. The low will track generally eastward into the
Kuskokwim Delta Sunday night. With dynamic fetch (waves moving in
the same direction as the storm's center for a long period of
time) expected on the south side of the low with the stronger
winds, look for seas exceeding 30 feet between the Aleutians and
the Pribilofs into Sunday night.

Once the low moves into Southwest Alaska, conditions will calm
down somewhat, with a much weaker low moving into the western
Aleutians late Sunday night into Monday morning. This weak low
will slowly track eastward through the central Bering through
Monday night, but no hazardous weather is expected from it.

&&

.LONG TERM FORECAST (Days 3 through 7)...
The progressive pattern with zonal westerly flow will continue
Monday night into Tuesday with a couple more cold troughs tracking
across southern Alaska. West to northwesterly outflow will
increase across Southcentral Alaska and the western Gulf Monday
night following the passage of one trough. The next trough,
bringing additional cold air aloft with it, will swing into
Southwest Alaska Monday night and continue into Southcentral and
the Gulf Tuesday with another small shortwave following through
the northwesterly flow aloft late Tuesday night through Wednesday
morning.

Further out to the west, a rapidly deepening north Pacific low
will track north towards the western Aleutians on Tuesday and
then cross into the western Bering Tuesday night and Wednesday.
With the low still strengthening as it passes not far to the west
of Shemya, storm force or stronger winds are likely. In response
to the deepening storm, a strong upper level ridge will build over
the central Bering Tuesday and then continue to amplify as it
shifts east over the eastern Bering Tuesday Night and west coast
of Alaska Wednesday.

Forecast confidence decreases rapidly Friday through the weekend
due to uncertainty in how fast the large ridge will push east and
in what manner it will break down. Models, however, do agree on
general trend back towards active zonal flow for the first half of
next week.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Storm Warning 130 131 136 137 165 170 173 175 177 178.
 Gale Warning 120 132 138 139 141 150 155 160 171 172 174 176 179
180 185.
 Heavy Freezing Spray 181.

&&

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