Gale Warning 326, NWS Anchorage, AK

042 
FZAK52 PAFC 172332
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
332 PM AKDT Tue Apr 17 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.

PKZ199-181300-
332 PM AKDT Tue Apr 17 2018
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A 972 mb low 120 nm South of St Paul Island loops around the 
Central Bering then slides to 35 nm West of Sand Point at 990 mb 
for Thu afternoon. Its front pushes over the Alaska Peninsula and 
extends South of the Aleutians through Thu afternoon.

$$

PKZ150-181300-
South of the AK Peninsula Sitkinak to Castle Cape-
332 PM AKDT Tue Apr 17 2018

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

.TONIGHT...S wind 30 kt diminishing to 20 kt after midnight. Seas
12 ft. Rain showers.
.WED...S wind 20 kt. Seas 12 ft.
.WED NIGHT...S wind 20 kt. Seas 12 ft.
.THU...S wind 20 kt. Seas 11 ft.
.THU NIGHT...S wind 15 kt. Seas 11 ft.
.FRI...W wind 15 kt. Seas 10 ft.
.SAT...SE wind 20 kt. Seas 7 ft.
.SUN...NW wind 15 kt. Seas 10 ft.

$$

PKZ155-181300-
South of the AK Peninsula Castle Cape to Cape Sarichef-
332 PM AKDT Tue Apr 17 2018

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

.TONIGHT...SW wind 30 kt. Seas 18 ft.
.WED...S wind 30 kt except S 25 kt from the Shumagin Islands E.
Seas 18 ft.
.WED NIGHT...SW wind 25 kt. Seas 16 ft.
.THU...SW wind 20 kt. Seas 14 ft.
.THU NIGHT...W wind 20 kt. Seas 13 ft.
.FRI...SW wind 15 kt. Seas 10 ft.
.SAT...NE wind 20 kt. Seas 10 ft.
.SUN...NW wind 20 kt. Seas 10 ft.

$$

PKZ160-181300-
Bristol Bay-
332 PM AKDT Tue Apr 17 2018

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 35 kt. Seas 8 ft.
.WED...SE wind 20 kt. Seas 5 ft.
.WED NIGHT...SE wind 20 kt. Seas 5 ft.
.THU...E wind 20 kt. Seas 5 ft.
.THU NIGHT...NE wind 15 kt. Seas 3 ft.
.FRI...SW wind 10 kt. Seas 2 ft.
.SAT...E wind 15 kt. Seas 4 ft.
.SUN...NW wind 10 kt. Seas 3 ft.

$$

PKZ165-181300-
Port Heiden to Cape Sarichef-
332 PM AKDT Tue Apr 17 2018

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

.TONIGHT...S wind 25 kt. Seas 10 ft.
.WED...SE wind 25 kt. Seas 11 ft.
.WED NIGHT...SE wind 20 kt. Seas 8 ft.
.THU...NE wind 15 kt. Seas 8 ft.
.THU NIGHT...N wind 15 kt. Seas 8 ft.
.FRI...N wind 15 kt. Seas 6 ft.
.SAT...NE wind 15 kt. Seas 5 ft.
.SUN...NW wind 15 kt. Seas 4 ft.

$$

PKZ170-181300-
Cape Sarichef to Nikolski Bering Side-
332 PM AKDT Tue Apr 17 2018

...GALE WARNING TONIGHT...

.TONIGHT...SW wind 35 kt diminishing to 25 kt after midnight. Seas
16 ft. Rain showers.
.WED...SW wind 25 kt. Seas 13 ft. Rain showers.
.WED NIGHT...W wind 30 kt. Seas 14 ft. Rain showers.
.THU...NW wind 30 kt. Seas 15 ft.
.THU NIGHT...NW wind 20 kt. Seas 10 ft.
.FRI...E wind 20 kt. Seas 6 ft.
.SAT...N wind 20 kt. Seas 6 ft.
.SUN...W wind 15 kt. Seas 5 ft.

$$

PKZ171-181300-
Unalaska Bay-
332 PM AKDT Tue Apr 17 2018

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...SW wind 25 kt. Seas 3 ft.
.WED...SW wind 10 kt. Seas 2 ft. Rain showers.
.WED NIGHT...SW wind 10 kt increasing to 15 kt after midnight.
Seas 2 ft. Rain showers.
.THU AND THU NIGHT...W wind 20 kt. Seas 3 ft.
.FRI...SE wind 15 kt. Seas 2 ft.
.SAT...N wind 15 kt. Seas 4 ft.
.SUN...W wind 15 kt. Seas 3 ft.

$$

PKZ172-181300-
Cape Sarichef to Nikolski Pacific Side-
332 PM AKDT Tue Apr 17 2018

...GALE WARNING TONIGHT AND WEDNESDAY NIGHT...

.TONIGHT...SW wind 40 kt. Seas 25 ft.
.WED...SW wind 30 kt. Seas 21 ft.
.WED NIGHT...W wind 35 kt. Seas 17 ft.
.THU...W wind 35 kt. Seas 17 ft.
.THU NIGHT...W wind 30 kt. Seas 14 ft.
.FRI...SE wind 20 kt. Seas 7 ft.
.SAT...N wind 20 kt. Seas 10 ft.
.SUN...W wind 20 kt. Seas 10 ft.

$$

PKZ173-181300-
Nikloski to Seguam Island Bering Side-
332 PM AKDT Tue Apr 17 2018

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...W wind 40 kt. Seas 20 ft. Rain showers.
.WED...W wind 35 kt. Seas 16 ft. Rain showers.
.WED NIGHT...W wind 35 kt. Seas 18 ft.
.THU...W wind 30 kt. Seas 17 ft.
.THU NIGHT...W wind 20 kt. Seas 9 ft.
.FRI...E wind 25 kt. Seas 6 ft.
.SAT...NW wind 15 kt. Seas 7 ft.
.SUN...SW wind 15 kt. Seas 5 ft.

$$

PKZ174-181300-
Nikolski to Seguam Island Pacific Side-
332 PM AKDT Tue Apr 17 2018

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...W wind 40 kt. Seas 27 ft. Rain showers.
.WED...W wind 40 kt. Seas 22 ft. Rain showers.
.WED NIGHT...W wind 40 kt. Seas 20 ft. Patchy fog.
.THU...W wind 35 kt. Seas 19 ft.
.THU NIGHT...SW wind 20 kt. Seas 11 ft.
.FRI...E wind 25 kt. Seas 9 ft.
.SAT...NW wind 20 kt. Seas 11 ft.
.SUN...SW wind 20 kt. Seas 8 ft.

$$

PKZ175-181300-
Seguam Island to Adak Bering Side-
332 PM AKDT Tue Apr 17 2018

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...W wind 40 kt. Seas 20 ft. Rain showers.
.WED...W wind 40 kt. Seas 18 ft. Rain showers.
.WED NIGHT...NW wind 35 kt. Seas 19 ft. Patchy fog.
.THU...W wind 30 kt. Seas 14 ft.
.THU NIGHT...S wind 15 kt. Seas 7 ft.
.FRI...NE wind 25 kt. Seas 6 ft.
.SAT...NW wind 15 kt. Seas 5 ft.
.SUN...S wind 15 kt. Seas 6 ft.

$$

PKZ176-181300-
Seguam Island to Adak Pacific Side-
332 PM AKDT Tue Apr 17 2018

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...W wind 40 kt. Seas 26 ft.
.WED...W wind 40 kt. Seas 20 ft.
.WED NIGHT...W wind 40 kt. Seas 19 ft. Patchy fog.
.THU...W wind 30 kt. Seas 13 ft.
.THU NIGHT...S wind 20 kt. Seas 8 ft.
.FRI...NE wind 25 kt. Seas 10 ft.
.SAT...NW wind 20 kt. Seas 10 ft.
.SUN...SW wind 20 kt. Seas 11 ft.

$$

PKZ177-181300-
Adak to Kiska-
332 PM AKDT Tue Apr 17 2018

...GALE WARNING THROUGH WEDNESDAY...

.TONIGHT...NW wind 35 kt. Seas 18 ft.
.WED...NW wind 35 kt. Seas 18 ft.
.WED NIGHT...W wind 30 kt. Seas 15 ft. Areas of fog.
.THU...SW wind 20 kt. Seas 9 ft.
.THU NIGHT...SE wind 20 kt. Seas 7 ft.
.FRI...N wind 20 kt. Seas 9 ft.
.SAT...W wind 20 kt. Seas 11 ft.
.SUN...S wind 20 kt. Seas 12 ft.

$$

PKZ178-181300-
Kiska to Attu-
332 PM AKDT Tue Apr 17 2018

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

.TONIGHT...NW wind 30 kt. Seas 15 ft.
.WED...W wind 30 kt. Seas 15 ft.
.WED NIGHT...SW wind 20 kt. Seas 10 ft. Patchy fog.
.THU...SW wind 20 kt. Seas 9 ft.
.THU NIGHT...SW wind 15 kt. Seas 8 ft.
.FRI...NW wind 20 kt. Seas 8 ft.
.SAT...SW wind 15 kt. Seas 12 ft.
.SUN...S wind 15 kt. Seas 18 ft.

$$

PKZ179-181300-
Pribilof Islands Near Shore Waters-
332 PM AKDT Tue Apr 17 2018

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

.TONIGHT...E wind 15 kt. Seas 11 ft.
.WED...NE wind 20 kt. Seas 10 ft.
.WED NIGHT...NE wind 20 kt. Seas 8 ft.
.THU...N wind 20 kt. Seas 8 ft.
.THU NIGHT...Variable wind 10 kt. Seas 6 ft.
.FRI...E wind 15 kt. Seas 6 ft.
.SAT...N wind 15 kt. Seas 6 ft.
.SUN...NW wind 15 kt. Seas 5 ft.

$$

PKZ180-181300-
Kuskokwim Delta and Etolin Strait-
332 PM AKDT Tue Apr 17 2018

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 35 kt. Seas 10 ft.
.WED...SE wind 25 kt. Seas 9 ft.
.WED NIGHT...E wind 25 kt. Seas 8 ft.
.THU...NE wind 20 kt. Seas 6 ft.
.THU NIGHT...N wind 15 kt. Seas 5 ft.
.FRI...NW wind 15 kt. Seas 3 ft.
.SAT THROUGH SUN...N wind 15 kt. Seas 3 ft.

$$

PKZ181-181300-
North and West of Nunivak Island-
332 PM AKDT Tue Apr 17 2018

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

.TONIGHT...E wind 30 kt. Seas 11 ft.
.WED...E wind 25 kt. Seas 9 ft.
.WED NIGHT...NE wind 25 kt. Seas 7 ft.
.THU...NE wind 15 kt. Seas 5 ft.
.THU NIGHT...N wind 15 kt. Seas 4 ft.
.FRI THROUGH SUN...NE wind 20 kt. Seas 5 ft.

$$

PKZ185-181300-
Saint Matthew Island Waters-
332 PM AKDT Tue Apr 17 2018

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

.TONIGHT...NE wind 30 kt. Seas 15 ft.
.WED...NE wind 25 kt. Seas 13 ft.
.WED NIGHT...NE wind 20 kt. Seas 9 ft.
.THU...NE wind 20 kt. Seas 7 ft.
.THU NIGHT...NE wind 15 kt. Seas 6 ft.
.FRI THROUGH SUN...NE wind 20 kt. Seas 7 ft.

$$

661 
FZAK52 PAFC 181146
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
346 AM AKDT Wed Apr 18 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.

PKZ199-190030-
346 AM AKDT Wed Apr 18 2018
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 974 mb low 80 nm southeast of St. Paul will dissipate in the
southwestern Gulf Fri morning. A 997 mb Kamchatka low will move 
near 250 nm northwest of Shemya Thu morning then it will move to 
110 nm west of Shemya Fri morning. A third 983 mb North Pacific low 
will approach the western Aleutians Fri morning.

$$

PKZ150-190030-
South of the AK Peninsula Sitkinak to Castle Cape-
346 AM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...S wind 20 kt. Seas 12 ft.
.TONIGHT...S wind 20 kt. Seas 11 ft.
.THU...S wind 20 kt. Seas 10 ft.
.THU NIGHT...S wind 15 kt. Seas 10 ft.
.FRI...Variable wind 10 kt. Seas 10 ft.
.SAT...SE wind 20 kt. Seas 11 ft.
.SUN...N wind 15 kt. Seas 15 ft.

$$

PKZ155-190030-
South of the AK Peninsula Castle Cape to Cape Sarichef-
346 AM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...S wind 30 kt. Seas 18 ft.
.TONIGHT...S wind 25 kt. Seas 15 ft. Rain showers.
.THU...SW wind 20 kt. Seas 13 ft.
.THU NIGHT...W wind 20 kt. Seas 13 ft.
.FRI...SW wind 20 kt. Seas 11 ft.
.SAT...NE wind 20 kt. Seas 15 ft.
.SUN...W wind 20 kt. Seas 15 ft.

$$

PKZ160-190030-
Bristol Bay-
346 AM AKDT Wed Apr 18 2018

.TODAY...SE wind 20 kt. Seas 5 ft.
.TONIGHT...SE wind 20 kt. Seas 6 ft.
.THU...E wind 20 kt. Seas 5 ft.
.THU NIGHT...N wind 15 kt. Seas 3 ft.
.FRI...W wind 15 kt. Seas 3 ft.
.SAT...E wind 15 kt. Seas 3 ft.
.SUN...W wind 15 kt. Seas 3 ft.

$$

PKZ165-190030-
Port Heiden to Cape Sarichef-
346 AM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...S wind 20 kt. Seas 11 ft.
.TONIGHT...S wind 15 kt except SE 25 kt from Port Moller E. Seas
8 ft.
.THU...SE wind 20 kt becoming N in the afternoon. Seas 8 ft.
.THU NIGHT...N wind 15 kt. Seas 9 ft.
.FRI...NW wind 15 kt. Seas 6 ft.
.SAT...NE wind 20 kt. Seas 5 ft.
.SUN...W wind 20 kt. Seas 6 ft.

$$

PKZ170-190030-
Cape Sarichef to Nikolski Bering Side-
346 AM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...SW wind 20 kt. Seas 13 ft.
.TONIGHT...W wind 30 kt. Seas 12 ft. Rain showers.
.THU...NW wind 30 kt. Seas 14 ft.
.THU NIGHT...NW wind 20 kt. Seas 11 ft.
.FRI...E wind 20 kt. Seas 6 ft.
.SAT...N wind 20 kt. Seas 6 ft.
.SUN...SW wind 20 kt. Seas 7 ft.

$$

PKZ171-190030-
Unalaska Bay-
346 AM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THURSDAY...

.TODAY...SW wind 10 kt. Seas 2 ft. Rain showers.
.TONIGHT...W wind 15 kt. Seas 2 ft. Rain showers.
.THU...W wind 25 kt. Seas 4 ft building to 7 ft in the afternoon.
Widespread rain showers.
.THU NIGHT...W wind 20 kt. Seas 3 ft.
.FRI...E wind 15 kt. Seas 2 ft.
.SAT...N wind 15 kt. Seas 4 ft.
.SUN...W wind 15 kt. Seas 4 ft.

$$

PKZ172-190030-
Cape Sarichef to Nikolski Pacific Side-
346 AM AKDT Wed Apr 18 2018

...GALE WARNING THURSDAY...

.TODAY...SW wind 30 kt. Seas 20 ft.
.TONIGHT...W wind 30 kt. Seas 17 ft.
.THU...W wind 35 kt. Seas 16 ft.
.THU NIGHT...W wind 25 kt. Seas 14 ft.
.FRI...SE wind 25 kt. Seas 9 ft.
.SAT...N wind 25 kt. Seas 15 ft.
.SUN...W wind 25 kt. Seas 12 ft.

$$

PKZ173-190030-
Nikloski to Seguam Island Bering Side-
346 AM AKDT Wed Apr 18 2018

...GALE WARNING TONIGHT...

.TODAY...W wind 30 kt. Seas 15 ft. Rain showers.
.TONIGHT...W wind 35 kt. Seas 17 ft. Rain showers.
.THU...W wind 30 kt. Seas 16 ft.
.THU NIGHT...SW wind 20 kt. Seas 10 ft.
.FRI...E wind 25 kt. Seas 7 ft.
.SAT...N wind 20 kt. Seas 8 ft.
.SUN...SW wind 20 kt. Seas 8 ft.

$$

PKZ174-190030-
Nikolski to Seguam Island Pacific Side-
346 AM AKDT Wed Apr 18 2018

...GALE WARNING THROUGH THURSDAY...

.TODAY...W wind 35 kt. Seas 21 ft. Rain showers.
.TONIGHT...W wind 35 kt. Seas 20 ft. Patchy fog. Rain showers.
.THU...W wind 35 kt. Seas 19 ft. Patchy fog.
.THU NIGHT...SW wind 20 kt. Seas 11 ft.
.FRI...E wind 25 kt. Seas 12 ft.
.SAT...NW wind 25 kt. Seas 15 ft.
.SUN...SW wind 25 kt. Seas 15 ft.

$$

PKZ175-190030-
Seguam Island to Adak Bering Side-
346 AM AKDT Wed Apr 18 2018

...GALE WARNING THROUGH TONIGHT...

.TODAY...W wind 40 kt. Seas 18 ft. Rain showers.
.TONIGHT...NW wind 35 kt. Seas 18 ft. Patchy fog.
.THU...W wind 30 kt diminishing to 20 kt in the afternoon. Seas
14 ft. Areas of fog.
.THU NIGHT...S wind 15 kt. Seas 7 ft.
.FRI...E wind 25 kt. Seas 6 ft.
.SAT...NW wind 15 kt. Seas 6 ft.
.SUN...S wind 20 kt. Seas 7 ft.

$$

PKZ176-190030-
Seguam Island to Adak Pacific Side-
346 AM AKDT Wed Apr 18 2018

...GALE WARNING THROUGH TONIGHT...

.TODAY...W wind 40 kt. Seas 19 ft.
.TONIGHT...W wind 40 kt. Seas 19 ft. Patchy fog.
.THU...W wind 30 kt diminishing to 20 kt in the afternoon. Seas
14 ft. Areas of fog.
.THU NIGHT...S wind 20 kt. Seas 9 ft.
.FRI...NE wind 30 kt. Seas 13 ft.
.SAT...NW wind 20 kt. Seas 14 ft.
.SUN...SW wind 30 kt. Seas 20 ft.

$$

PKZ177-190030-
Adak to Kiska-
346 AM AKDT Wed Apr 18 2018

...GALE WARNING THROUGH TONIGHT...

.TODAY...NW wind 35 kt. Seas 18 ft.
.TONIGHT...W wind 35 kt diminishing to 25 kt after midnight. Seas
16 ft. Areas of fog.
.THU...SW wind 20 kt. Seas 9 ft. Areas of fog.
.THU NIGHT...SE wind 20 kt. Seas 7 ft.
.FRI...N wind 25 kt. Seas 13 ft.
.SAT...W wind 25 kt. Seas 13 ft.
.SUN...S wind 25 kt. Seas 20 ft.

$$

PKZ178-190030-
Kiska to Attu-
346 AM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...W wind 30 kt. Seas 16 ft.
.TONIGHT...SW wind 20 kt. Seas 10 ft. Patchy fog.
.THU...SW wind 20 kt. Seas 10 ft. Patchy fog.
.THU NIGHT...SW wind 15 kt. Seas 8 ft.
.FRI...NW wind 20 kt. Seas 12 ft.
.SAT...SW wind 25 kt. Seas 11 ft.
.SUN...SE wind 25 kt. Seas 16 ft.

$$

PKZ179-190030-
Pribilof Islands Near Shore Waters-
346 AM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...NE wind 20 kt. Seas 11 ft.
.TONIGHT...NE wind 20 kt. Seas 9 ft.
.THU...N wind 15 kt. Seas 8 ft.
.THU NIGHT...Variable wind 10 kt. Seas 6 ft.
.FRI...NE wind 15 kt. Seas 4 ft.
.SAT...N wind 20 kt. Seas 7 ft.
.SUN...N wind 15 kt. Seas 7 ft.

$$

PKZ180-190030-
Kuskokwim Delta and Etolin Strait-
346 AM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...E wind 25 kt. Seas 8 ft.
.TONIGHT...E wind 20 kt. Seas 8 ft.
.THU...E wind 20 kt. Seas 6 ft.
.THU NIGHT...NW wind 15 kt. Seas 4 ft.
.FRI...NW wind 15 kt. Seas 4 ft.
.SAT THROUGH SUN...NW wind 20 kt. Seas 5 ft.

$$

PKZ181-190030-
North and West of Nunivak Island-
346 AM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY TODAY...

.TODAY...E wind 25 kt. Seas 9 ft.
.TONIGHT...E wind 20 kt. Seas 7 ft.
.THU...NE wind 15 kt. Seas 5 ft.
.THU NIGHT...N wind 15 kt. Seas 4 ft.
.FRI...N wind 20 kt. Seas 6 ft.
.SAT THROUGH SUN...NE wind 25 kt. Seas 8 ft.

$$

PKZ185-190030-
Saint Matthew Island Waters-
346 AM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...NE wind 25 kt. Seas 13 ft.
.TONIGHT...NE wind 20 kt. Seas 9 ft.
.THU...NE wind 20 kt. Seas 7 ft.
.THU NIGHT...NE wind 15 kt. Seas 6 ft.
.FRI...NE wind 20 kt. Seas 8 ft.
.SAT THROUGH SUN...NE wind 25 kt. Seas 9 ft.

$$

377 
FZAK52 PAFC 182335
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
335 PM AKDT Wed Apr 18 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.

PKZ199-191230-
335 PM AKDT Wed Apr 18 2018
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 977 mb low 35 nm south of St. George Island will move to 25 nm
north of Sand Point at 988 mb by Thu afternoon and then dissipate
by Thu night. A 983 mb low Thu afternoon 450 nm south of Shemya 
will move to 150 nm southeast of Adak at 981 mb by Fri afternoon.

$$

PKZ150-191230-
South of the AK Peninsula Sitkinak to Castle Cape-
335 PM AKDT Wed Apr 18 2018

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

.TONIGHT...S wind 20 kt. Seas 12 ft.
.THU...S wind 20 kt. Seas 10 ft.
.THU NIGHT...S wind 20 kt. Seas 11 ft.
.FRI AND FRI NIGHT...SW wind 15 kt. Seas 10 ft.
.SAT...SE wind 25 kt. Seas 11 ft.
.SUN...N wind 15 kt. Seas 15 ft.
.MON...S wind 25 kt. Seas 11 ft.

$$

PKZ155-191230-
South of the AK Peninsula Castle Cape to Cape Sarichef-
335 PM AKDT Wed Apr 18 2018

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

.TONIGHT...S wind 25 kt. Seas 15 ft. Rain showers.
.THU...SW wind 20 kt. Seas 14 ft.
.THU NIGHT...W wind 25 kt except SW 15 kt from the Shumagin
Islands E. Seas 13 ft.
.FRI...W wind 20 kt. Seas 11 ft.
.FRI NIGHT...SE wind 20 kt. Seas 7 ft.
.SAT...NE wind 25 kt. Seas 15 ft.
.SUN...W wind 20 kt. Seas 15 ft.
.MON...S wind 25 kt. Seas 12 ft.

$$

PKZ160-191230-
Bristol Bay-
335 PM AKDT Wed Apr 18 2018

.TONIGHT...SE wind 20 kt. Seas 5 ft.
.THU...E wind 20 kt. Seas 5 ft.
.THU NIGHT...NE wind 15 kt becoming N after midnight. Seas 3 ft.
.FRI AND FRI NIGHT...SW wind 15 kt. Seas 3 ft.
.SAT...E wind 15 kt. Seas 3 ft.
.SUN...W wind 15 kt. Seas 3 ft.
.MON...SE wind 25 kt. Seas 6 ft.

$$

PKZ165-191230-
Port Heiden to Cape Sarichef-
335 PM AKDT Wed Apr 18 2018

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

.TONIGHT...SE wind 20 kt. Seas 9 ft.
.THU...SE wind 20 kt. Seas 8 ft.
.THU NIGHT...N wind 15 kt. Seas 8 ft.
.FRI AND FRI NIGHT...NW wind 15 kt. Seas 5 ft.
.SAT...NE wind 20 kt. Seas 5 ft.
.SUN...W wind 20 kt. Seas 6 ft.
.MON...S wind 20 kt. Seas 6 ft.

$$

PKZ170-191230-
Cape Sarichef to Nikolski Bering Side-
335 PM AKDT Wed Apr 18 2018

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

.TONIGHT...W wind 30 kt. Seas 12 ft. Rain showers.
.THU...W wind 30 kt. Seas 13 ft.
.THU NIGHT...NW wind 20 kt. Seas 10 ft. Patchy fog.
.FRI...E wind 15 kt. Seas 6 ft.
.FRI NIGHT...E wind 20 kt. Seas 5 ft.
.SAT...N wind 20 kt. Seas 6 ft.
.SUN...SW wind 20 kt. Seas 7 ft.
.MON...S wind 25 kt. Seas 10 ft.

$$

PKZ171-191230-
Unalaska Bay-
335 PM AKDT Wed Apr 18 2018

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

.TONIGHT...W wind 15 kt. Seas 3 ft. Rain showers.
.THU...W wind 30 kt becoming NW in the afternoon. Seas 5 ft building
to 9 ft in the afternoon. Rain showers.
.THU NIGHT...W wind 25 kt. Seas 5 ft. Patchy fog.
.FRI AND FRI NIGHT...E wind 15 kt. Seas 3 ft.
.SAT...N wind 15 kt. Seas 4 ft.
.SUN...W wind 15 kt. Seas 4 ft.
.MON...S wind 20 kt. Seas 3 ft.

$$

PKZ172-191230-
Cape Sarichef to Nikolski Pacific Side-
335 PM AKDT Wed Apr 18 2018

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

.TONIGHT...W wind 30 kt. Seas 16 ft.
.THU...W wind 30 kt. Seas 16 ft.
.THU NIGHT...W wind 30 kt diminishing to 20 kt after midnight.
Seas 14 ft.
.FRI...S wind 20 kt. Seas 8 ft.
.FRI NIGHT...E wind 30 kt. Seas 7 ft.
.SAT...N wind 25 kt. Seas 15 ft.
.SUN...W wind 25 kt. Seas 12 ft.
.MON...SW wind 30 kt. Seas 19 ft.

$$

PKZ173-191230-
Nikolski to Seguam Island Bering Side-
335 PM AKDT Wed Apr 18 2018

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

.TONIGHT...W wind 30 kt. Seas 15 ft. Rain showers.
.THU...W wind 30 kt. Seas 15 ft.
.THU NIGHT...W wind 20 kt in the evening becoming variable 10 kt.
Seas 10 ft. Patchy fog.
.FRI AND FRI NIGHT...NE wind 25 kt. Seas 6 ft.
.SAT...N wind 20 kt. Seas 8 ft.
.SUN...SW wind 20 kt. Seas 8 ft.
.MON...S wind 25 kt. Seas 13 ft.

$$

PKZ174-191230-
Nikolski to Seguam Island Pacific Side-
335 PM AKDT Wed Apr 18 2018

...GALE WARNING THROUGH THURSDAY...

.TONIGHT...W wind 35 kt. Seas 20 ft. Patchy fog. Rain showers.
.THU...W wind 35 kt. Seas 19 ft. Patchy fog.
.THU NIGHT...W wind 25 kt becoming SW 15 kt after midnight. Seas
12 ft. Patchy fog.
.FRI...E wind 30 kt. Seas 8 ft.
.FRI NIGHT...NE wind 30 kt. Seas 11 ft.
.SAT...N wind 25 kt. Seas 13 ft.
.SUN...SW wind 25 kt. Seas 15 ft.
.MON...SW wind 30 kt. Seas 25 ft.

$$

PKZ175-191230-
Seguam Island to Adak Bering Side-
335 PM AKDT Wed Apr 18 2018

...GALE WARNING TONIGHT...

.TONIGHT...W wind 35 kt. Seas 19 ft. Patchy fog. Rain showers.
.THU...W wind 30 kt. Seas 14 ft. Areas of fog.
.THU NIGHT...SW wind 15 kt. Seas 7 ft. Patchy fog.
.FRI AND FRI NIGHT...NE wind 25 kt. Seas 6 ft.
.SAT...NW wind 20 kt. Seas 5 ft.
.SUN...S wind 20 kt. Seas 7 ft.
.MON...SW wind 25 kt. Seas 9 ft.

$$

PKZ176-191230-
Seguam Island to Adak Pacific Side-
335 PM AKDT Wed Apr 18 2018

...GALE WARNING TONIGHT...

.TONIGHT...W wind 40 kt. Seas 20 ft. Patchy fog.
.THU...W wind 30 kt. Seas 15 ft subsiding to 10 ft in the
afternoon. Areas of fog.
.THU NIGHT...Variable wind 10 kt becoming SE 20 kt after midnight.
Seas 8 ft. Patchy fog.
.FRI...E wind 30 kt. Seas 9 ft.
.FRI NIGHT...NE wind 30 kt. Seas 13 ft.
.SAT...NW wind 20 kt. Seas 13 ft.
.SUN THROUGH MON...SW wind 30 kt. Seas 23 ft.

$$

PKZ177-191230-
Adak to Kiska-
335 PM AKDT Wed Apr 18 2018

...GALE WARNING TONIGHT...

.TONIGHT...W wind 35 kt diminishing to 25 kt after midnight. Seas
16 ft. Areas of fog.
.THU...W wind 20 kt in the morning becoming variable 10 kt. Seas
9 ft. Areas of fog.
.THU NIGHT...E wind 20 kt. Seas 7 ft. Areas of fog.
.FRI...NE wind 25 kt. Seas 8 ft.
.FRI NIGHT...N wind 20 kt. Seas 11 ft.
.SAT...W wind 25 kt. Seas 10 ft.
.SUN...S wind 25 kt. Seas 20 ft.
.MON...W wind 25 kt. Seas 20 ft.

$$

PKZ178-191230-
Kiska to Attu-
335 PM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TONIGHT...W wind 20 kt. Seas 11 ft. Patchy fog.
.THU...SW wind 15 kt. Seas 9 ft. Patchy fog.
.THU NIGHT...Variable wind 10 kt. Seas 7 ft. Patchy fog. Rain and
snow.
.FRI AND FRI NIGHT...W wind 20 kt. Seas 8 ft.
.SAT...S wind 25 kt. Seas 11 ft.
.SUN...SE wind 25 kt. Seas 16 ft.
.MON...N wind 30 kt. Seas 16 ft.

$$

PKZ179-191230-
Pribilof Islands Near Shore Waters-
335 PM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TONIGHT...NE wind 20 kt. Seas 8 ft.
.THU...N wind 20 kt. Seas 8 ft.
.THU NIGHT...Variable wind 10 kt. Seas 6 ft. Patchy fog.
.FRI...Variable wind 10 kt. Seas 4 ft.
.FRI NIGHT...N wind 15 kt. Seas 4 ft.
.SAT...N wind 20 kt. Seas 7 ft.
.SUN...N wind 15 kt. Seas 7 ft.
.MON...SE wind 20 kt. Seas 8 ft.

$$

PKZ180-191230-
Kuskokwim Delta and Etolin Strait-
335 PM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...E wind 20 kt. Seas 8 ft.
.THU...NE wind 20 kt. Seas 5 ft.
.THU NIGHT...N wind 15 kt. Seas 4 ft.
.FRI AND FRI NIGHT...NW wind 15 kt. Seas 4 ft.
.SAT...NE wind 20 kt. Seas 5 ft.
.SUN...NW wind 20 kt. Seas 5 ft.
.MON...SE wind 25 kt. Seas 8 ft.

$$

PKZ181-191230-
North and West of Nunivak Island-
335 PM AKDT Wed Apr 18 2018

.TONIGHT...E wind 20 kt. Seas 7 ft.
.THU...NE wind 15 kt. Seas 5 ft.
.THU NIGHT...N wind 15 kt. Seas 4 ft.
.FRI...N wind 20 kt. Seas 4 ft.
.FRI NIGHT...N wind 25 kt. Seas 7 ft.
.SAT THROUGH SUN...NE wind 25 kt. Seas 8 ft.
.MON...E wind 25 kt. Seas 9 ft.

$$

PKZ185-191230-
Saint Matthew Island Waters-
335 PM AKDT Wed Apr 18 2018

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...NE wind 20 kt. Seas 9 ft.
.THU...NE wind 20 kt. Seas 7 ft.
.THU NIGHT...NE wind 15 kt. Seas 6 ft.
.FRI...NE wind 20 kt. Seas 6 ft.
.FRI NIGHT...NE wind 25 kt. Seas 7 ft.
.SAT THROUGH SUN...NE wind 25 kt. Seas 9 ft.
.MON...E wind 30 kt. Seas 11 ft.

$$

700 
FZAK52 PAFC 191156
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
356 AM AKDT Thu Apr 19 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.

PKZ199-200045-
356 AM AKDT Thu Apr 19 2018
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...A 983 mb low 70 nm
northwest of Dutch Harbor will move into the southwestern Gulf and 
dissipate Fri afternoon. A 995 mb Kamchatka low will move to 240 nm 
west of Shemya tonight then it will move over Shemya at 1000 mb Sat 
morning. A front associated with a North Pacific low will move over 
the central Aleutians Fri morning.

$$

PKZ150-200045-
South of the AK Peninsula Sitkinak to Castle Cape-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...S wind 20 kt. Seas 10 ft.
.TONIGHT...S wind 15 kt. Seas 10 ft.
.FRI...Variable wind 10 kt. Seas 9 ft.
.FRI NIGHT...SW wind 15 kt. Seas 8 ft.
.SAT...SE wind 30 kt. Seas 11 ft.
.SUN...NE wind 20 kt. Seas 15 ft.
.MON...S wind 25 kt. Seas 17 ft.

$$

PKZ155-200045-
South of the AK Peninsula Castle Cape to Cape Sarichef-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...SW wind 20 kt. Seas 13 ft.
.TONIGHT...W wind 20 kt. Seas 12 ft.
.FRI...W wind 15 kt. Seas 11 ft.
.FRI NIGHT...SE wind 20 kt. Seas 6 ft.
.SAT...NE wind 25 kt. Seas 14 ft.
.SUN...W wind 20 kt. Seas 14 ft.
.MON...S wind 30 kt. Seas 18 ft.

$$

PKZ160-200045-
Bristol Bay-
356 AM AKDT Thu Apr 19 2018

.TODAY...E wind 15 kt. Seas 4 ft.
.TONIGHT...NE wind 15 kt becoming N after midnight. Seas 4 ft.
.FRI...W wind 10 kt increasing to 15 kt in the afternoon. Seas 3
ft.
.FRI NIGHT...SW wind 15 kt. Seas 3 ft.
.SAT THROUGH MON...SE wind 25 kt. Seas 5 ft.

$$

PKZ165-200045-
Port Heiden to Cape Sarichef-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY TONIGHT...

.TODAY...Variable wind 10 kt except NE 20 kt from Port Moller E.
Seas 7 ft.
.TONIGHT...N wind 15 kt. Seas 8 ft.
.FRI...NW wind 15 kt. Seas 6 ft.
.FRI NIGHT...Variable wind 10 kt. Seas 4 ft.
.SAT...N wind 15 kt. Seas 4 ft.
.SUN...W wind 20 kt. Seas 6 ft.
.MON...S wind 25 kt. Seas 9 ft.

$$

PKZ170-200045-
Cape Sarichef to Nikolski Bering Side-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...W wind increasing to 25 kt. Seas 13 ft.
.TONIGHT...NW wind 20 kt. Seas 10 ft. Patchy fog.
.FRI...Variable wind 10 kt becoming E 15 kt in the afternoon. Seas
6 ft. Patchy fog.
.FRI NIGHT...NE wind 20 kt. Seas 5 ft.
.SAT...N wind 20 kt. Seas 6 ft.
.SUN...SW wind 25 kt. Seas 8 ft.
.MON...S wind 25 kt. Seas 10 ft.

$$

PKZ171-200045-
Unalaska Bay-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY TODAY...

.TODAY...W wind 10 kt increasing to 25 kt in the afternoon. Seas 3 
ft building to 7 ft in the afternoon. Rain showers.
.TONIGHT...NW wind 20 kt. Seas 7 ft subsiding to 3 ft after
midnight. Patchy fog.
.FRI...Variable wind less than 10 kt becoming E 10 kt in the
afternoon. Seas 3 ft. Patchy fog.
.FRI NIGHT...E wind 10 kt. Seas 2 ft.
.SAT...N wind 15 kt. Seas 4 ft.
.SUN...W wind 15 kt. Seas 4 ft.
.MON...S wind 20 kt. Seas 3 ft.

$$

PKZ172-200045-
Cape Sarichef to Nikolski Pacific Side-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...W wind 30 kt. Seas 15 ft.
.TONIGHT...W wind 25 kt. Seas 14 ft.
.FRI...W wind 15 kt becoming SE in the afternoon. Seas 8 ft.
Patchy fog.
.FRI NIGHT...E wind 25 kt. Seas 7 ft.
.SAT...N wind 25 kt. Seas 14 ft.
.SUN...W wind 25 kt. Seas 13 ft.
.MON...SW wind 30 kt. Seas 17 ft.

$$

PKZ173-200045-
Nikolski to Seguam Island Bering Side-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...W wind 30 kt. Seas 15 ft.
.TONIGHT...W wind 20 kt in the evening becoming variable 10 kt.
Seas 10 ft. Patchy fog.
.FRI...E wind 20 kt. Seas 6 ft. Patchy fog.
.FRI NIGHT...NE wind 25 kt. Seas 6 ft.
.SAT...N wind 15 kt. Seas 8 ft.
.SUN...SW wind 25 kt. Seas 9 ft.
.MON...SW wind 30 kt. Seas 11 ft.

$$

PKZ174-200045-
Nikolski to Seguam Island Pacific Side-
356 AM AKDT Thu Apr 19 2018

...GALE WARNING TODAY...

.TODAY...W wind 35 kt. Seas 18 ft. Patchy fog.
.TONIGHT...W wind 25 kt becoming SW 15 kt after midnight. Seas
12 ft. Patchy fog.
.FRI...SE wind 20 kt becoming E 30 kt in the afternoon. Seas 7 ft.
Patchy fog.
.FRI NIGHT...NE wind 30 kt. Seas 11 ft.
.SAT...NW wind 20 kt. Seas 14 ft.
.SUN...SW wind 25 kt. Seas 15 ft.
.MON...SW wind 30 kt. Seas 17 ft.

$$

PKZ175-200045-
Seguam Island to Adak Bering Side-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY TODAY AND FRIDAY...

.TODAY...W wind 30 kt. Seas 14 ft. Patchy fog.
.TONIGHT...SW wind 15 kt becoming SE after midnight. Seas 7 ft.
Patchy fog.
.FRI...E wind 25 kt. Seas 6 ft. Patchy fog.
.FRI NIGHT...NE wind 25 kt. Seas 6 ft.
.SAT...NW wind 15 kt. Seas 5 ft.
.SUN...S wind 20 kt. Seas 9 ft.
.MON...SW wind 25 kt. Seas 12 ft.

$$

PKZ176-200045-
Seguam Island to Adak Pacific Side-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...W wind 30 kt. Seas 14 ft. Patchy fog.
.TONIGHT...Variable wind 10 kt becoming SE 20 kt after midnight.
Seas 8 ft. Patchy fog.
.FRI...E wind 30 kt. Seas 10 ft. Rain.
.FRI NIGHT...NE wind 30 kt. Seas 14 ft.
.SAT...NW wind 20 kt. Seas 13 ft.
.SUN THROUGH MON...SW wind 30 kt. Seas 16 ft.

$$

PKZ177-200045-
Adak to Kiska-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY TODAY AND FRIDAY...

.TODAY...W wind 20 kt in the morning becoming variable 10 kt. Seas
9 ft. Areas of fog.
.TONIGHT...E wind 20 kt. Seas 7 ft. Areas of fog.
.FRI...E wind 25 kt. Seas 8 ft. Rain.
.FRI NIGHT...N wind 15 kt. Seas 11 ft.
.SAT...SW wind 20 kt. Seas 10 ft.
.SUN...S wind 25 kt. Seas 13 ft.
.MON...W wind 30 kt. Seas 13 ft.

$$

PKZ178-200045-
Kiska to Attu-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...S wind 15 kt. Seas 8 ft. Patchy fog.
.TONIGHT...SE wind 15 kt. Seas 8 ft. Patchy fog. Rain.
.FRI...S wind 15 kt. Seas 7 ft. Rain.
.FRI NIGHT...W wind 20 kt. Seas 9 ft.
.SAT...SE wind 20 kt. Seas 8 ft.
.SUN...E wind 25 kt. Seas 12 ft.
.MON...NW wind 30 kt. Seas 13 ft.

$$

PKZ179-200045-
Pribilof Islands Near Shore Waters-
356 AM AKDT Thu Apr 19 2018

...SMALL CRAFT ADVISORY TODAY...

.TODAY...NE wind 15 kt. Seas 8 ft.
.TONIGHT...Variable wind 10 kt. Seas 6 ft. Patchy fog.
.FRI...Variable wind 10 kt. Seas 4 ft. Patchy fog.
.FRI NIGHT...N wind 15 kt. Seas 4 ft.
.SAT...N wind 20 kt. Seas 8 ft.
.SUN...W wind 20 kt. Seas 7 ft.
.MON...SE wind 20 kt. Seas 7 ft.

$$

PKZ180-200045-
Kuskokwim Delta and Etolin Strait-
356 AM AKDT Thu Apr 19 2018

.TODAY...E wind 20 kt. Seas 5 ft.
.TONIGHT...N wind 15 kt. Seas 4 ft.
.FRI...NW wind 15 kt. Seas 4 ft.
.FRI NIGHT...NW wind 20 kt. Seas 4 ft.
.SAT...NE wind 20 kt. Seas 5 ft.
.SUN...SE wind 20 kt. Seas 4 ft.
.MON...SE wind 25 kt. Seas 6 ft.

$$

PKZ181-200045-
North and West of Nunivak Island-
356 AM AKDT Thu Apr 19 2018

.TODAY...NE wind 15 kt. Seas 4 ft.
.TONIGHT...N wind 15 kt. Seas 4 ft.
.FRI...N wind 20 kt. Seas 4 ft.
.FRI NIGHT...N wind 25 kt. Seas 7 ft.
.SAT...NE wind 25 kt. Seas 8 ft.
.SUN THROUGH MON...E wind 25 kt. Seas 7 ft.

$$

PKZ185-200045-
Saint Matthew Island Waters-
356 AM AKDT Thu Apr 19 2018

.TODAY...NE wind 20 kt. Seas 7 ft.
.TONIGHT...NE wind 15 kt. Seas 6 ft.
.FRI...NE wind 20 kt. Seas 6 ft.
.FRI NIGHT...NE wind 25 kt. Seas 8 ft.
.SAT...NE wind 25 kt. Seas 9 ft.
.SUN THROUGH MON...E wind 30 kt. Seas 16 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
329 PM AKDT Mon Apr 16 2018

.ANALYSIS AND UPPER LEVELS...
The ridge that has been over the mainland part of the state the
past few days is weakening as the center is moving northward into
the Arctic. Enough of a ridge is still over the eastern part of
the forecast area (as far southwest as Anchorage) to keep most of
the clouds at bay today. However, the front in southwest mainland
Alaska and the western Gulf of Alaska is keeping the
precipitation in those areas. This front can be seen on IR
satellite elongating with warming cloud top temperatures
indicating that it is weakening. The 250 mb jet stream is becoming
a bit more zonal running west-to-east over the Aleutian Islands.
The whole jet is edging southward and should be south of the
Aleutian Islands by late tonight. The low near Attu is tracking
steadily eastward as it brings widespread gales and some storm
force winds to marine areas in the Bering Sea and Aleutian
Islands.

&&

.MODEL DISCUSSION...
Models continue to have great agreement through most of the week
with small divergence in low tracks beginning by Friday. Even
these differences are not likely to make major changes in the
forecast. The biggest element of interest where the model
solutions will have the greatest impact will be this weekend as a
cold upper level low digs southwestward from the Yukon Arctic
coast. The 12Z ECMWF has a somewhat stronger 500 mb low moving
over Nunivak Island Saturday afternoon while the GFS is a little
weaker and 400 miles farther east. The existence of the upper
level low and its movement into mainland Alaska looks likely, but
this difference in tracks will have a large impact on the weather
for both Southcentral and Southwest mainland Alaska.

&&

.AVIATION...
PANC...VFR conditions will persist through Tuesday afternoon.
Winds will remain the only real potential impact to the PANC TAF
through Tuesday afternoon. This evening may see a period of
southeast winds but the Turnagain Arm winds will not be very
strong which should limit potential winds to 10 kt this evening.
Late Tuesday afternoon will likely be a different situation as the
Turnagain Arm winds will be stronger and more likely to bend into
the airport late afternoon into the evening with gusts in the 20
kt range.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA...
The front over the western Gulf that extends through Kodiak Island
and out over southwest Alaska has stalled and is bringing rain to
Kodiak Island and southern Kenai Peninsula. It will remain in
place until Tuesday when another approaching system will push it
north. As it approaches the north Gulf coast, easterly winds will
increase along the coast and for east/west oriented gaps such as
the Turnagain Arm area. The front will then bring rain to areas
all along the north Gulf coast with some higher elevations seeing
snow into Wednesday. The front from the new system will follow
close behind the first front making it to the north Gulf coast by
Wednesday afternoon adding another wave of precip to the area.
Precip will continue but diminish through Thursday for areas along
the north Gulf coast.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2)...
Moving into Western Alaska is a decaying occluded front. There
are some isolated showers on the radar at King Salmon but the
Bethel radar is pretty dry. The front will continue to get sheered
apart as it moves towards the interior. The Alaska Range can
still anticipate more QPF from this boundary tonight but otherwise
there is not too much more in store from that system. The next
storm will follow quickly in its wake and expecting the next round
of precipitation as early as tomorrow morning for places like
Kipnuk and Togiak. At this stage it looks like it will start out
as a rain/snow mix and then change over to rain.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2)...
The next in a series of lows has already moved into the Western
Bering/Aleutians, with the occlusion bisecting the chain. This
system will push into the Central Bering with the front holding
together this forecast period. The thickness packing retains its
thermal ridging into Wednesday which implies that the occlusion
will be slow to decay. The latest ASCAT (advanced scatterometer)
pass only sampled the Eastern Bering which was pretty tame at the
time of sampling but the models suggest that widespread gales will
impact the Western/Central Bering tonight and tomorrow.
Additionally, most of the operational runs ping into storm force
winds materializing south of the chain. Once this low gets into
the Central Bering, it really starts to slow down.

&&

.LONG TERM FORECAST (Thursday through Monday)...
Southeast flow and wet weather will continue on Thursday across
the Gulf coastal areas, with persistent cloudcover across interior
areas and parts of Southwest Alaska. On Friday and Saturday, an
upper low will start to dig down from the northeast across the
mainland, which will pull shower activity inland across Cook Inlet
and perhaps even into Southwest Alaska as the upper low drops
into the longwave trough that will be persisting over the eastern
Bering. A storm on Sunday will approach the state and, depending
on the strength of the aforementioned upper low, will start to be
pulled northward toward southern Alaska. There is still quite a
bit of uncertainty with where this low will end up, but its likely
the Gulf Coastal areas will see another round of steady rain
develop on Sunday and continue through the start of next week.
Overall, the forecast for most of the state is fairly cloudy with
near-normal temperatures, which will be a change from the endless
sunshine Southcentral has had recently.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Storm Warning 176 177.
 Gale Warning 119 130 155 160 165 170>175 178>181 185.

&&

SYNOPSIS AND MODEL DISCUSSION...EZ
SOUTHCENTRAL ALASKA...DK
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...PJS
LONG TERM...AD