Small Craft Advisory 641, NWS Anchorage, AK

Issued

Aug 15, 2021, 2:31 PM AKDT (22:31 UTC)

Expired

Aug 16, 2021, 3:30 AM AKDT

In force

13 hr

Issued by

NWS Anchorage, AK

637 
FZAK52 PAFC 152231
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
231 PM AKDT Sun Aug 15 2021

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.

PKZ199-161130-
231 PM AKDT Sun Aug 15 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 999 mb low 330 nm south of Adak strengthens to 995 mb 85 nm 
south of Seguam Island Mon morning. The low shifts to 50 nm east of 
Chignik and weakens to 1005 mb Tues afternoon. Its front crosses the 
Aleutian Islands and spreads into Bristol Bay through Tues 
afternoon. A series of weak lows cross the northern Bering through 
Tues afternoon.

$$

PKZ150-161130-
South of the AK Peninsula Sitkinak to Castle Cape-
231 PM AKDT Sun Aug 15 2021

...SMALL CRAFT ADVISORY MONDAY AND MONDAY NIGHT...

.TONIGHT...W wind 20 kt. Seas 6 ft.
.MON...SW wind 20 kt becoming S 30 kt in the afternoon. Seas 8 ft.
Rain.
.MON NIGHT...S wind 30 kt becoming W 25 kt after midnight. Seas 11 
ft.
.TUE...W wind 25 kt. Seas 9 ft.
.TUE NIGHT...W wind 15 kt. Seas 8 ft.
.WED THROUGH FRI...W wind 15 kt. Seas 7 ft.

$$

PKZ155-161130-
South of the AK Peninsula Castle Cape to Cape Sarichef-
231 PM AKDT Sun Aug 15 2021

...SMALL CRAFT ADVISORY MONDAY AND MONDAY NIGHT...

.TONIGHT...W wind 15 kt becoming S 20 kt after midnight. Seas 5 ft.
.MON...SE wind 30 kt. Seas 9 ft. Rain.
.MON NIGHT...SW wind 25 kt. Seas 9 ft.
.TUE...SW wind 20 kt. Seas 9 ft.
.TUE NIGHT...Variable wind 10 kt. Seas 9 ft.
.WED THROUGH THU...SW wind 15 kt. Seas 7 ft.
.FRI...NW wind 15 kt. Seas 5 ft.

$$

PKZ160-161130-
Bristol Bay-
231 PM AKDT Sun Aug 15 2021

.TONIGHT...W wind 20 kt. Seas 4 ft.
.MON...SW wind 10 kt becoming SE in the afternoon. Seas 3 ft.
.MON NIGHT...E wind 15 kt becoming NE after midnight. Seas 3 ft.
.TUE...N wind 10 kt. Seas 2 ft.
.TUE NIGHT...W wind 15 kt. Seas 2 ft.
.WED...SW wind 10 kt. Seas 2 ft.
.THU...SW wind 15 kt. Seas 3 ft.
.FRI...NW wind 15 kt. Seas 3 ft.

$$

PKZ165-161130-
Port Heiden to Cape Sarichef-
231 PM AKDT Sun Aug 15 2021

...SMALL CRAFT ADVISORY MONDAY...

.TONIGHT...W wind 15 kt becoming S 20 kt after midnight. Seas 5 ft.
.MON...SE wind 25 kt. Seas 5 ft. Rain.
.MON NIGHT...E wind 15 kt. Seas 4 ft.
.TUE AND TUE NIGHT...Variable wind 10 kt. Seas 3 ft.
.WED...SW wind 15 kt. Seas 2 ft.
.THU...SW wind 20 kt. Seas 4 ft.
.FRI...NW wind 15 kt. Seas 4 ft.

$$

PKZ170-161130-
Cape Sarichef to Nikolski Bering Side-
231 PM AKDT Sun Aug 15 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY...

.TONIGHT...SE wind 25 kt. Seas 5 ft.
.MON...SE wind 30 kt. Seas 6 ft. Rain.
.MON NIGHT...E wind 15 kt. Seas 5 ft.
.TUE...N wind 15 kt. Seas 5 ft.
.TUE NIGHT...Variable wind 10 kt. Seas 3 ft.
.WED THROUGH THU...W wind 15 kt. Seas 4 ft.
.FRI...N wind 15 kt. Seas 4 ft.

$$

PKZ171-161130-
Unalaska Bay-
231 PM AKDT Sun Aug 15 2021

...SMALL CRAFT ADVISORY MONDAY...

.TONIGHT...SE wind 20 kt. Seas 3 ft. Rain.
.MON...SE wind 25 kt. Seas 3 ft. Rain.
.MON NIGHT...Variable wind less than 10 kt. Seas 2 ft. Rain.
.TUE AND TUE NIGHT...N wind 10 kt. Seas 2 ft.
.WED...N wind 10 kt. Seas 2 ft.
.THU...SW wind 10 kt. Seas 3 ft.
.FRI...N wind 10 kt. Seas 3 ft.

$$

PKZ172-161130-
Cape Sarichef to Nikolski Pacific Side-
231 PM AKDT Sun Aug 15 2021

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

.TONIGHT...SE wind 25 kt. Seas 7 ft. Rain.
.MON...SE wind 25 kt becoming S in the afternoon. Seas 9 ft.
.MON NIGHT...S wind 20 kt. Seas 10 ft.
.TUE...NW wind 15 kt. Seas 10 ft.
.TUE NIGHT...Variable wind 10 kt. Seas 8 ft.
.WED...NW wind 15 kt. Seas 6 ft.
.THU...W wind 15 kt. Seas 6 ft.
.FRI...Variable wind 10 kt. Seas 5 ft.

$$

PKZ173-161130-
Nikolski to Seguam Island Bering Side-
231 PM AKDT Sun Aug 15 2021

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

.TONIGHT...SE wind 25 kt. Seas 6 ft. Rain.
.MON...E wind 25 kt. Seas 7 ft. Rain.
.MON NIGHT...NE wind 20 kt. Seas 8 ft.
.TUE...N wind 15 kt. Seas 7 ft.
.TUE NIGHT...Variable wind 10 kt. Seas 5 ft.
.WED THROUGH THU...W wind 15 kt. Seas 4 ft.
.FRI...Variable wind 10 kt. Seas 4 ft.

$$

PKZ174-161130-
Nikolski to Seguam Island Pacific Side-
231 PM AKDT Sun Aug 15 2021

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

.TONIGHT...SE wind 20 kt in the evening becoming E 25 kt. Seas 8 ft.
Rain.
.MON...SE wind 25 kt becoming S in the afternoon. Seas 11 ft.
.MON NIGHT...S wind 20 kt in the evening becoming variable 10 kt.
Seas 11 ft.
.TUE...N wind 15 kt. Seas 9 ft.
.TUE NIGHT...Variable wind 10 kt. Seas 6 ft.
.WED...N wind 15 kt. Seas 6 ft.
.THU...W wind 15 kt. Seas 6 ft.
.FRI...NW wind 15 kt. Seas 5 ft.

$$

PKZ175-161130-
Seguam Island to Adak Bering Side-
231 PM AKDT Sun Aug 15 2021

...SMALL CRAFT ADVISORY MONDAY AND MONDAY NIGHT...

.TONIGHT...E wind 20 kt. Seas 5 ft.
.MON...NE wind 25 kt. Seas 7 ft.
.MON NIGHT...N wind 25 kt. Seas 8 ft.
.TUE...N wind 15 kt. Seas 6 ft.
.TUE NIGHT...Variable wind 10 kt. Seas 3 ft.
.WED THROUGH THU...W wind 15 kt. Seas 4 ft.
.FRI...SW wind 15 kt. Seas 4 ft.

$$

PKZ176-161130-
Seguam Island to Adak Pacific Side-
231 PM AKDT Sun Aug 15 2021

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

.TONIGHT...SE wind 15 kt becoming NE 25 kt after midnight. Seas 7 
ft. Rain.
.MON...NE wind 25 kt. Seas 10 ft.
.MON NIGHT...NW wind 25 kt. Seas 10 ft.
.TUE...N wind 20 kt. Seas 7 ft.
.TUE NIGHT...Variable wind 10 kt. Seas 6 ft.
.WED THROUGH FRI...W wind 15 kt. Seas 6 ft.

$$

PKZ177-161130-
Adak to Kiska-
231 PM AKDT Sun Aug 15 2021

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

.TONIGHT...NE wind 25 kt. Seas 6 ft.
.MON...N wind 30 kt. Seas 7 ft.
.MON NIGHT...N wind 25 kt. Seas 7 ft.
.TUE AND TUE NIGHT...W wind 15 kt. Seas 5 ft.
.WED THROUGH THU...W wind 15 kt. Seas 5 ft.
.FRI...SW wind 20 kt. Seas 5 ft.

$$

PKZ178-161130-
Kiska to Attu-
231 PM AKDT Sun Aug 15 2021

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...N wind 25 kt. Seas 6 ft.
.MON...NW wind 20 kt. Seas 5 ft.
.MON NIGHT...NW wind 15 kt. Seas 4 ft.
.TUE...W wind 15 kt. Seas 5 ft.
.TUE NIGHT...W wind 20 kt. Seas 5 ft.
.WED...SW wind 15 kt. Seas 5 ft.
.THU THROUGH FRI...S wind 20 kt. Seas 6 ft.

$$

PKZ179-161130-
Pribilof Islands Near Shore Waters-
231 PM AKDT Sun Aug 15 2021

.TONIGHT...SW wind 20 kt becoming S 15 kt after midnight. Seas 6 ft.
.MON...E wind 15 kt. Seas 5 ft.
.MON NIGHT...NE wind 10 kt. Seas 4 ft.
.TUE...Variable wind 10 kt. Seas 5 ft.
.TUE NIGHT...SW wind 15 kt. Seas 4 ft.
.WED...SW wind 20 kt. Seas 4 ft.
.THU...NW wind 15 kt. Seas 5 ft.
.FRI...Variable wind 10 kt. Seas 4 ft.

$$

PKZ180-161130-
Kuskokwim Delta and Etolin Strait-
231 PM AKDT Sun Aug 15 2021

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...SW wind 25 kt. Seas 7 ft.
.MON...S wind 20 kt. Seas 6 ft.
.MON NIGHT...SE wind 15 kt becoming NE after midnight. Seas 4 ft.
.TUE...NW wind 10 kt. Seas 3 ft.
.TUE NIGHT...W wind 10 kt. Seas 2 ft.
.WED...SW wind 25 kt. Seas 4 ft.
.THU...W wind 20 kt. Seas 4 ft.
.FRI...NW wind 15 kt. Seas 4 ft.

$$

PKZ181-161130-
North and West of Nunivak Island-
231 PM AKDT Sun Aug 15 2021

...SMALL CRAFT ADVISORY THROUGH MONDAY...

.TONIGHT...SW wind 25 kt. Seas 8 ft.
.MON...SW wind 25 kt diminishing to 15 kt in the afternoon. Seas 7 
ft.
.MON NIGHT...SW wind 15 kt in the evening becoming NW. Seas 4 ft.
.TUE...NE wind 15 kt. Seas 4 ft.
.TUE NIGHT...E wind 15 kt. Seas 3 ft.
.WED...S wind 25 kt. Seas 7 ft.
.THU THROUGH FRI...W wind 20 kt. Seas 4 ft.

$$

PKZ185-161130-
Saint Matthew Island Waters-
231 PM AKDT Sun Aug 15 2021

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...SW wind 25 kt. Seas 8 ft.
.MON...E of St Matthew island, SW wind 20 kt. W of St Matthew Island,
N wind 15 kt. Seas 6 ft.
.MON NIGHT...NE wind 15 kt. Seas 5 ft.
.TUE...E wind 20 kt. Seas 4 ft.
.TUE NIGHT...S wind 25 kt. Seas 6 ft.
.WED...NW wind 25 kt. Seas 8 ft.
.THU...W wind 20 kt. Seas 6 ft.
.FRI...S wind 20 kt. Seas 5 ft.

$$

Small Craft Advisories in Alaska, 2021Every small craft advisory in 2021

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.