Storm Warning 79, NWS Anchorage, AK

066 
FZAK52 PAFC 192256
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
256 PM AKDT Sun Mar 19 2023

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.

PKZ199-201130-
256 PM AKDT Sun Mar 19 2023
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A strong 956 mb low 210 nm North of Kiska moves over the Chukotsk 
Peninsula at 980 mb for Tue afternoon. Its front sweeps across the 
Aleutians and Bering into Western Alaska by Tue morning. A 980 mb Sea
of Okhotsk low drives to 135 nm North of Cold Bay at 986 mb for Tue 
afternoon. Its front extends across the Alaska Peninsula by Tue 
afternoon. 

$$

PKZ750-201130-
Sitkinak to Castle Cape out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...SMALL CRAFT ADVISORY MONDAY...

.TONIGHT...NW wind 15 kt becoming S after midnight. Seas 5 ft.
.MON...SW wind 30 kt. Seas 9 ft. Rain and snow.
.MON NIGHT...W wind 20 kt. Seas 7 ft.
.TUE...S wind 20 kt. Seas 6 ft.
.TUE NIGHT...NE wind 30 kt. Seas 11 ft.
.WED...NW wind 35 kt. Seas 13 ft.
.THU...W wind 30 kt. Seas 7 ft.
.FRI...NW wind 20 kt. Seas 6 ft.

$$

PKZ751-201130-
Sitkinak to Castle Cape from 15 to 100 NM-
256 PM AKDT Sun Mar 19 2023

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

.TONIGHT...W wind 20 kt. Seas 8 ft.
.MON...S wind 30 kt. Seas 11 ft. Rain and snow.
.MON NIGHT...W wind 25 kt. Seas 10 ft.
.TUE...S wind 20 kt. Seas 9 ft.
.TUE NIGHT...NW wind 30 kt. Seas 14 ft.
.WED...NW wind 40 kt. Seas 21 ft.
.THU...W wind 35 kt. Seas 16 ft.
.FRI...W wind 25 kt. Seas 10 ft.

$$

PKZ752-201130-
Castle Cape to Cape Tolstoi out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...SMALL CRAFT ADVISORY THROUGH MONDAY...

.TONIGHT...SW wind 15 kt becoming S 25 kt after midnight. Seas 7
ft. Snow and rain.
.MON...SW wind 25 kt. Seas 8 ft.
.MON NIGHT...W wind 20 kt. Seas 6 ft.
.TUE...S wind 20 kt. Seas 6 ft.
.TUE NIGHT...NW wind 30 kt. Seas 9 ft.
.WED...W wind 30 kt. Seas 9 ft.
.THU...W wind 25 kt. Seas 5 ft.
.FRI...W wind 15 kt. Seas 4 ft.

$$

PKZ753-201130-
Castle Cape to Cape Tolstoi from 15 to 100 NM-
256 PM AKDT Sun Mar 19 2023

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

.TONIGHT...SW wind 20 kt becoming S 30 kt after midnight. Seas
10 ft. Snow and rain.
.MON...SW wind 30 kt. Seas 12 ft.
.MON NIGHT...W wind 25 kt. Seas 12 ft.
.TUE...S wind 25 kt. Seas 9 ft.
.TUE NIGHT...W wind 40 kt. Seas 19 ft.
.WED...W wind 35 kt. Seas 19 ft.
.THU...W wind 30 kt. Seas 14 ft.
.FRI...W wind 20 kt. Seas 9 ft.

$$

PKZ754-201130-
Cape Tolstoi to Cape Sarichef out to 15 NM-
256 PM AKDT Sun Mar 19 2023

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

.TONIGHT...SW wind 30 kt. Seas 6 ft building to 11 ft after
midnight. Rain and snow.
.MON...SW wind 30 kt. Seas 10 ft.
.MON NIGHT...W wind 25 kt. Seas 10 ft.
.TUE...S wind 25 kt. Seas 8 ft.
.TUE NIGHT...NW wind 30 kt. Seas 10 ft.
.WED...W wind 30 kt. Seas 10 ft.
.THU...W wind 25 kt. Seas 6 ft.
.FRI...W wind 15 kt. Seas 6 ft.

$$

PKZ755-201130-
Cape Tolstoi to Cape Sarichef from 15 to 100 NM-
256 PM AKDT Sun Mar 19 2023

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

.TONIGHT...SW wind 30 kt. Seas 13 ft. Rain with snow.
.MON...SW wind 30 kt. Seas 14 ft.
.MON NIGHT...W wind 25 kt. Seas 13 ft. Snow.
.TUE...SW wind 30 kt. Seas 13 ft.
.TUE NIGHT...NW wind 40 kt. Seas 18 ft.
.WED...W wind 35 kt. Seas 17 ft.
.THU...W wind 30 kt. Seas 12 ft.
.FRI...W wind 20 kt. Seas 9 ft.

$$

PKZ756-201130-
Port Heiden to Nelson Lagoon out to 15 NM-
256 PM AKDT Sun Mar 19 2023

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

.TONIGHT...S wind 20 kt becoming SE 30 kt after midnight. Seas 7
ft. Snow and rain.
.MON...SW wind 30 kt. Seas 6 ft building to 12 ft in the
afternoon. Snow showers and rain showers.
.MON NIGHT...SW wind 25 kt. Seas 12 ft.
.TUE...SE wind 20 kt. Seas 7 ft.
.TUE NIGHT...N wind 30 kt. Seas 11 ft.
.WED THROUGH THU...W wind 30 kt. Seas 11 ft.
.FRI...W wind 20 kt. Seas 9 ft.

$$

PKZ757-201130-
Port Heiden to Nelson Lagoon from 15 to 60 NM-
256 PM AKDT Sun Mar 19 2023

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

.TONIGHT...S wind 30 kt. Seas 7 ft building to 11 ft after
midnight. Snow and rain.
.MON...SW wind 30 kt. Seas 15 ft. Snow showers.
.MON NIGHT...W wind 25 kt. Seas 15 ft.
.TUE...SE wind 20 kt. Seas 9 ft.
.TUE NIGHT...N wind 30 kt. Seas 12 ft.
.WED THROUGH THU...W wind 30 kt. Seas 13 ft.
.FRI...W wind 20 kt. Seas 10 ft.

$$

PKZ758-201130-
Nelson Lagoon to Cape Sarichef out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING TONIGHT...

.TONIGHT...S wind 35 kt. Seas 9 ft. Rain and snow.
.MON...SW wind 30 kt. Seas 17 ft. Rain showers and snow showers.
.MON NIGHT...W wind 30 kt. Seas 16 ft.
.TUE...S wind 25 kt. Seas 9 ft.
.TUE NIGHT...NW wind 35 kt. Seas 12 ft.
.WED THROUGH THU...W wind 30 kt. Seas 14 ft.
.FRI...W wind 20 kt. Seas 10 ft.

$$

PKZ759-201130-
Nelson Lagoon to Cape Sarichef from 15 to 70 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY...

.TONIGHT...S wind 35 kt. Seas 13 ft. Rain and snow.
.MON...SW wind 35 kt. Seas 20 ft. Snow showers and rain showers.
.MON NIGHT...W wind 30 kt. Seas 17 ft.
.TUE...S wind 25 kt. Seas 11 ft.
.TUE NIGHT...NW wind 35 kt. Seas 13 ft.
.WED THROUGH THU...W wind 30 kt. Seas 14 ft.
.FRI...W wind 20 kt. Seas 11 ft.

$$

PKZ770-201130-
Cape Sarichef to Nikoski Bering Side out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY...

.TONIGHT...S wind 40 kt. Seas 15 ft.
.MON...SW wind 35 kt. Seas 19 ft.
.MON NIGHT...S wind 30 kt. Seas 15 ft. Widespread snow showers.
.TUE AND TUE NIGHT...W wind 35 kt. Seas 16 ft.
.WED...W wind 35 kt. Seas 17 ft.
.THU...W wind 30 kt. Seas 10 ft.
.FRI...SW wind 20 kt. Seas 9 ft.

$$

PKZ772-201130-
Cape Sarichef to Nikoski Bering Side from 15 to 85 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY...

.TONIGHT...S wind 40 kt. Seas 20 ft.
.MON...SW wind 40 kt. Seas 23 ft.
.MON NIGHT...SW wind 30 kt. Seas 17 ft. Widespread snow and rain
showers.
.TUE AND TUE NIGHT...W wind 35 kt. Seas 17 ft.
.WED...W wind 35 kt. Seas 17 ft.
.THU...W wind 30 kt. Seas 12 ft.
.FRI...SW wind 25 kt. Seas 9 ft.

$$

PKZ771-201130-
Unalaska Bay-
256 PM AKDT Sun Mar 19 2023

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

.TONIGHT...S wind 25 kt. Seas 3 ft. Rain.
.MON...W wind 25 kt. Seas 4 ft.
.MON NIGHT...SW wind 25 kt. Seas 4 ft. Widespread snow showers.
.TUE AND TUE NIGHT...W wind 35 kt. Seas 12 ft.
.WED...W wind 30 kt. Seas 5 ft.
.THU...W wind 20 kt. Seas 3 ft.
.FRI...SW wind 15 kt. Seas 2 ft.

$$

PKZ773-201130-
Cape Sarichef to Nikoski Pacific Side out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING TONIGHT...

.TONIGHT...S wind 35 kt. Seas 15 ft. Rain.
.MON...SW wind 30 kt. Seas 14 ft.
.MON NIGHT...S wind 30 kt. Seas 11 ft. Widespread snow and rain
showers.
.TUE AND TUE NIGHT...W wind 40 kt. Seas 14 ft.
.WED...W wind 30 kt. Seas 13 ft.
.THU...W wind 30 kt. Seas 7 ft.
.FRI...SW wind 20 kt. Seas 8 ft.

$$

PKZ774-201130-
Cape Sarichef to Nikoski Pacific Side from 15 to 85 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING TONIGHT...

.TONIGHT...SW wind 35 kt. Seas 16 ft.
.MON...W wind 30 kt. Seas 16 ft.
.MON NIGHT...SW wind 30 kt. Seas 15 ft. Widespread rain and snow
showers.
.TUE AND TUE NIGHT...W wind 40 kt. Seas 19 ft.
.WED...W wind 35 kt. Seas 16 ft.
.THU...W wind 30 kt. Seas 11 ft.
.FRI...W wind 20 kt. Seas 9 ft.

$$

PKZ775-201130-
Nikolski to Seguam Bering Side out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY...

.TONIGHT...SW wind 45 kt. Seas 19 ft.
.MON...W wind 35 kt. Seas 20 ft. Rain showers.
.MON NIGHT...SW wind 30 kt. Seas 14 ft. Widespread rain and snow
showers.
.TUE...W wind 40 kt. Seas 19 ft.
.TUE NIGHT THROUGH WED...W wind 35 kt. Seas 16 ft.
.THU...W wind 25 kt. Seas 9 ft.
.FRI...SW wind 20 kt. Seas 9 ft.

$$

PKZ776-201130-
Nikolski to Seguam Bering Side from 15 to 85 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY...

.TONIGHT...SW wind 45 kt. Seas 23 ft.
.MON...W wind 40 kt diminishing to 30 kt in the afternoon. Seas
24 ft.
.MON NIGHT...SW wind 30 kt. Seas 15 ft. Widespread rain and snow
showers.
.TUE...NW wind 40 kt. Seas 19 ft.
.TUE NIGHT THROUGH WED...W wind 35 kt. Seas 17 ft.
.THU...W wind 30 kt. Seas 11 ft.
.FRI...S wind 25 kt. Seas 9 ft.

$$

PKZ777-201130-
Nikolski to Seguam Pacfic Side out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING TONIGHT AND MONDAY NIGHT...

.TONIGHT...SW wind 45 kt. Seas 19 ft. Rain.
.MON...W wind 30 kt. Seas 18 ft.
.MON NIGHT...SW wind 35 kt. Seas 15 ft. Widespread rain and snow
showers.
.TUE...W wind 40 kt. Seas 20 ft.
.TUE NIGHT...W wind 35 kt. Seas 15 ft.
.WED...W wind 30 kt. Seas 15 ft.
.THU...W wind 25 kt. Seas 10 ft.
.FRI...SW wind 20 kt. Seas 10 ft.

$$

PKZ778-201130-
Nikolski to Seguam Pacific Side from 15 to 75 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING TONIGHT AND MONDAY NIGHT...

.TONIGHT...SW wind 40 kt. Seas 19 ft. Rain.
.MON...W wind 30 kt. Seas 19 ft.
.MON NIGHT...SW wind 25 kt increasing to 35 kt after midnight.
Seas 16 ft. Widespread rain and snow showers.
.TUE...W wind 40 kt. Seas 21 ft.
.TUE NIGHT...W wind 35 kt. Seas 17 ft.
.WED...W wind 30 kt. Seas 16 ft.
.THU...SW wind 25 kt. Seas 10 ft.
.FRI...S wind 20 kt. Seas 10 ft.

$$

PKZ780-201130-
Seguam to Adak Bering Side out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...STORM WARNING TONIGHT...

.TONIGHT...SW wind 50 kt becoming W 40 kt after midnight. Seas
20 ft. Snow showers.
.MON...W wind 35 kt. Seas 16 ft.
.MON NIGHT...SW wind 35 kt. Seas 14 ft. Widespread rain and snow
showers.
.TUE AND TUE NIGHT...W wind 35 kt. Seas 15 ft.
.WED...SW wind 30 kt. Seas 13 ft.
.THU...W wind 25 kt. Seas 7 ft.
.FRI...S wind 25 kt. Seas 6 ft.

$$

PKZ781-201130-
Seguam to Adak Bering Side from 15 to 85 NM-
256 PM AKDT Sun Mar 19 2023

...STORM WARNING TONIGHT...

.TONIGHT...SW wind 55 kt becoming W 45 kt after midnight. Seas
29 ft.
.MON...W wind 35 kt. Seas 20 ft.
.MON NIGHT...SW wind 35 kt. Seas 16 ft. Widespread rain and snow
showers.
.TUE AND TUE NIGHT...W wind 35 kt. Seas 17 ft.
.WED...SW wind 30 kt. Seas 14 ft.
.THU...W wind 25 kt. Seas 10 ft.
.FRI...S wind 30 kt. Seas 8 ft.

$$

PKZ782-201130-
Seguam to Adak Pacific Side out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...SW wind 45 kt. Seas 22 ft. Snow showers.
.MON...W wind 35 kt. Seas 18 ft.
.MON NIGHT...SW wind 35 kt. Seas 17 ft. Widespread rain and snow
showers.
.TUE AND TUE NIGHT...W wind 35 kt. Seas 16 ft.
.WED...SW wind 25 kt. Seas 11 ft.
.THU...W wind 20 kt. Seas 8 ft.
.FRI...S wind 25 kt. Seas 7 ft.

$$

PKZ783-201130-
Seguam to Adak Pacific Side from 15 to 75 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...SW wind 45 kt becoming W 35 kt after midnight. Seas
23 ft.
.MON...W wind 35 kt. Seas 20 ft.
.MON NIGHT...W wind 40 kt. Seas 20 ft. Widespread rain and snow
showers.
.TUE...NW wind 35 kt. Seas 20 ft.
.TUE NIGHT...W wind 30 kt. Seas 16 ft.
.WED...SW wind 25 kt. Seas 13 ft.
.THU...W wind 20 kt. Seas 9 ft.
.FRI...S wind 25 kt. Seas 8 ft.

$$

PKZ784-201130-
Adak to Kiska Bering Side-
256 PM AKDT Sun Mar 19 2023

...STORM WARNING TONIGHT...

.TONIGHT...W wind 60 kt diminishing to 40 kt after midnight. Gusts to
65 kt before midnight. Seas 35 ft subsiding to 22 ft after midnight.
Snow showers.
.MON...SW wind 35 kt. Seas 17 ft. Widespread snow and rain
showers.
.MON NIGHT...SW wind 35 kt. Seas 16 ft. Widespread rain showers.
.TUE AND TUE NIGHT...W wind 35 kt. Seas 15 ft.
.WED...SW wind 25 kt. Seas 13 ft.
.THU...SW wind 20 kt. Seas 7 ft.
.FRI...S wind 35 kt. Seas 11 ft.

$$

PKZ785-201130-
Adak to Kiska Pacific Side-
256 PM AKDT Sun Mar 19 2023

...STORM WARNING TONIGHT...

.TONIGHT...W wind 50 kt diminishing to 35 kt after midnight. Gusts to
65 kt before midnight. Seas 29 ft subsiding to 21 ft after midnight.
Snow showers.
.MON...SW wind 30 kt increasing to 40 kt in the afternoon. Seas
20 ft. Widespread rain showers.
.MON NIGHT...SW wind 40 kt. Seas 21 ft. Widespread rain showers.
.TUE AND TUE NIGHT...W wind 30 kt. Seas 16 ft.
.WED...SW wind 25 kt. Seas 11 ft.
.THU...W wind 15 kt. Seas 7 ft.
.FRI...S wind 30 kt. Seas 9 ft.

$$

PKZ786-201130-
Kiska to Attu Bering Side-
256 PM AKDT Sun Mar 19 2023

...STORM WARNING TONIGHT...

.TONIGHT...W wind 50 kt diminishing to 30 kt after midnight. Seas
29 ft subsiding to 17 ft after midnight.
.MON...SW wind 30 kt. Seas 15 ft. Widespread snow and rain
showers.
.MON NIGHT...NW wind 30 kt. Seas 14 ft.  and rain showers.
.TUE...W wind 35 kt. Seas 15 ft.
.TUE NIGHT...SW wind 25 kt. Seas 13 ft.
.WED...SW wind 25 kt. Seas 12 ft.
.THU...SW wind 30 kt. Seas 7 ft.
.FRI...S wind 40 kt. Seas 17 ft.

$$

PKZ787-201130-
Kiska to Attu Pacific Side-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...W wind 45 kt diminishing to 35 kt after midnight. Seas
28 ft subsiding to 20 ft after midnight. Snow showers.
.MON...SW wind 40 kt. Seas 20 ft. Widespread rain and snow
showers.
.MON NIGHT...NW wind 40 kt diminishing to 30 kt after midnight.
Seas 21 ft subsiding to 15 ft after midnight.
.TUE...W wind 30 kt. Seas 15 ft.
.TUE NIGHT...SW wind 25 kt. Seas 12 ft.
.WED...SW wind 25 kt. Seas 11 ft.
.THU...SW wind 30 kt. Seas 8 ft.
.FRI...S wind 35 kt. Seas 16 ft.

$$

PKZ766-201130-
Pribilof Islands Nearshore Waters-
256 PM AKDT Sun Mar 19 2023

...STORM WARNING THROUGH MONDAY...

.TONIGHT...SW wind 50 kt. Seas 19 ft building to 28 ft after
midnight. Rain with snow.
.MON...SW wind 50 kt becoming W 40 kt in the afternoon. Seas 31 ft
subsiding to 23 ft in the afternoon.  and rain showers.
.MON NIGHT...SW wind 30 kt diminishing to 20 kt after midnight.
Seas
17 ft subsiding to 12 ft after midnight. Snow and rain showers.
.TUE...NW wind 25 kt. Seas 10 ft.
.TUE NIGHT...W wind 30 kt. Seas 14 ft.
.WED THROUGH THU...W wind 30 kt. Seas 13 ft.
.FRI...SW wind 25 kt. Seas 9 ft.

$$

PKZ760-201130-
Bristol Bay greater than 15 NM-
256 PM AKDT Sun Mar 19 2023

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

.TONIGHT...SW wind 15 kt becoming SE 30 kt after midnight. Seas in
ice free waters 3 ft building to 6 ft after midnight. Snow.
.MON...S wind 30 kt. Seas in ice free waters 8 ft. Snow.
.MON NIGHT...SW wind 25 kt. Seas in ice free waters 10 ft.
.TUE...SE wind 20 kt. Seas in ice free waters 6 ft.
.TUE NIGHT...N wind 20 kt. Seas in ice free waters 6 ft.
.WED...NW wind 30 kt. Seas in ice free waters 10 ft.
.THU...W wind 25 kt. Seas in ice free waters 10 ft.
.FRI...W wind 20 kt. Seas in ice free waters 8 ft.

$$

PKZ761-201130-
Bristol Bay from Port Heiden to Cape Chichagof out to 15 NM-
256 PM AKDT Sun Mar 19 2023

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

.TONIGHT...SW wind 15 kt becoming SE 25 kt after midnight. Seas in
ice free waters 2 ft.
.MON...SE wind 25 kt. Seas in ice free waters 3 ft. Snow.
.MON NIGHT...SW wind 25 kt. Seas in ice free waters 4 ft.
.TUE...SE wind 15 kt. Seas in ice free waters 2 ft.
.TUE NIGHT...N wind 20 kt. Seas in ice free waters 3 ft.
.WED THROUGH THU...W wind 30 kt. Seas in ice free waters 5 ft.
.FRI...W wind 20 kt. Seas in ice free waters 4 ft.

$$

PKZ762-201130-
Bristol Bay from Cape Chichagof to Cape Pierce out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...BRISK WIND ADVISORY THROUGH MONDAY...

.TONIGHT...S wind 15 kt becoming SE 30 kt after midnight.  Snow.
.MON...SE wind 30 kt. Snow.
.MON NIGHT...SW wind 20 kt.
.TUE...SE wind 15 kt.
.TUE NIGHT...N wind 15 kt.
.WED...NW wind 25 kt.
.THU...SW wind 20 kt.
.FRI...W wind 15 kt.

$$

PKZ763-201130-
Kuskokwim Delta and Etolin Strait out to 15 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY...

.TONIGHT...SE wind 30 kt increasing to 45 kt after midnight.
Snow.
.MON...S wind 40 kt. Widespread snow showers.
.MON NIGHT...SW wind 30 kt becoming S 20 kt after midnight.
.TUE...S wind 20 kt.
.TUE NIGHT...W wind 15 kt.
.WED...W wind 20 kt.
.THU...SW wind 25 kt.
.FRI...SW wind 20 kt.

$$

PKZ764-201130-
Kuskokwim Delta from 15 to 80 NM-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY...

.TONIGHT...S wind 40 kt. Seas in ice free waters 5 ft building to
11 ft after midnight. Snow.
.MON...S wind 40 kt. Seas in ice free waters 11 ft. Snow.
.MON NIGHT...SW wind 30 kt diminishing to 20 kt after midnight.
Seas in ice free waters 11 ft.
.TUE...S wind 20 kt. Seas in ice free waters 7 ft.
.TUE NIGHT...NW wind 25 kt. Seas in ice free waters 6 ft.
.WED THROUGH THU...W wind 25 kt. Seas in ice free waters 8 ft.
.FRI...W wind 20 kt. Seas in ice free waters 5 ft.

$$

PKZ765-201130-
North and West of Nunivak Island-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...SE wind 45 kt. Snow.
.MON...S wind 40 kt. Snow.
.MON NIGHT...SW wind 35 kt diminishing to 25 kt after midnight.
.TUE...SW wind 20 kt.
.TUE NIGHT...W wind 15 kt.
.WED...W wind 15 kt.
.THU...W wind 25 kt.
.FRI...SW wind 25 kt.

$$

PKZ767-201130-
Saint Matthew Island Waters-
256 PM AKDT Sun Mar 19 2023

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...SE wind 45 kt. Seas in ice free waters 2 ft E of Saint
Matthew Island...17 ft W of Saint Matthew Island. Widespread snow
showers.
.MON...W wind 45 kt. Seas in ice free waters 2 ft E of Saint
Matthew Island...23 ft W of Saint Matthew Island. Freezing spray. 
Snow.
.MON NIGHT...W wind 35 kt. Seas in ice free waters 2 ft E of Saint
Matthew Island...16 ft W of Saint Matthew Island. Freezing spray.
.TUE AND TUE NIGHT...W wind 30 kt. Seas in ice free waters 12 ft.
.WED...W wind 25 kt. Seas in ice free waters 12 ft.
.THU...W wind 25 kt. Seas in ice free waters 8 ft.
.FRI...S wind 30 kt. Seas in ice free waters 20 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
513 PM AKDT Sat Mar 18 2023

.ANALYSIS AND UPPER LEVELS...

The main weather feature is a strong low pressure system tracking
through the Gulf of Alaska from southeast to northwest. Radar
shows moderate and heavy precipitation across Prince William Sound
and the Kenai Peninsula. Gusty, easterly winds are also
strengthening as a result of a tightening pressure gradient
between a mainland high and Gulf low. Out west, a low centered
along the Alaska Peninsula is bringing northerly winds and light
snow showers over the eastern Aleutians and Bristol Bay coast. A
weak front is pushing into the Bering Sea, while a deep low in the
North Pacific approaches the western Aleutians.

&&

.MODEL DISCUSSION...

Model guidance is in decent agreement with the placement and
intensity of synoptic scale features at both the surface and in
the upper levels. The current forecast is on track for heavy snow
and gusty winds for interior locations of the eastern Kenai
Peninsula today. There is some uncertainty with precipitation type
for coastal and near- coastal areas such as Seward and Portage
Valley due to the timing of the warmer air intrusion.

&&

.AVIATION...
PANC... A chance for light snow this afternoon before changing
over to a rain/snow mix in the evening. Ceiling and visibility
will lower to MVFR conditions, with increased northerly winds.
Conditions are expected improve through the overnight hours, with
increasing winds out of the south.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 through 3:
Tonight through Tuesday)...

The second of two very similar east-to-west tracking lows is now
making its approach on the Kenai Peninsula this afternoon.
Widespread moderate to heavy snowfall has overspread much of the
Kenai Peninsula on schedule to the north of the center as a deep
stream of moisture fires into the Prince William Sound region.
Most of the heaviest rates have been observed over the Portage
Valley and Whittier so far, although a developing east wind will
help push temperatures above freezing and result in mixing with or
changeover to rain at lower elevations between Whittier and the
Turnagain Arm this evening. Farther west, it's looking more likely
downsloping associated with developing cross- barrier flow north
of the low as it moves quickly towards the Barren Islands will end
up limiting snowfall totals, with the best chance for a few
inches of accumulating snow focused down towards Homer. Similarly,
downslope drying will be a limiting factor over the Mat Valley
and Anchorage area, with the best potential for accumulating wet
snow focused over the upper hillside through this evening. A
Winter Weather Advisory and Winter Storm Warning remain in effect
for the western and eastern Kenai Peninsula respectively for the
combination of falling and blowing snow this evening.

By early Sunday, the rapidly west-bound low will move out of the
picture as it heads out over Bristol Bay, with a colder air mass
expected to be pulled into Southcentral as it wraps in from the
Gulf behind the low. This will leave much of the region in a
showery, onshore flow pattern, with lingering snow showers focused
primarily along the coast between the western Prince William Sound
and eastern Kenai Peninsula. The upper level low in the southwest
Gulf will stretch out into an upper trough that will lift
northeast across Southcentral late Sunday into Monday, but drier
air in place by this point will prevent this system from spurring
off any renewed precipitation for most of Southcentral. A front
associated with a large low moving over the Bering will reach
Kodiak Island by Monday afternoon, then continue north into the
Kenai Peninsula as a triple-point low attempts to form along it
and move towards Prince William Sound. This will bring in our next
potential for light snowfall shifting from Kodiak Island on
Monday and up towards the Kenai Peninsula once again by Tuesday.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 through 3: Tonight
through Tuesday)...

Remnants of a Gulf low are now tracking into interior Bristol Bay
this evening with increasing cloud cover and somewhat elevated
northwesterly winds of 15 to 20 mph. Saturday started off with
largely clear skies across Southwest and pleasant conditions
through the afternoon hours. Through tonight, however, clouds will
continue to spread westward, eventually encompassing all of
Southwest. A winter weather advisory remains in effect later
tonight for expected blowing snow through the early morning hours
on Sunday across interior Bristol Bay. Light snow with
accumulations of 1 to 2 inches are forecast from Dillingham and
northward. Increasing winds with gusts to 40 mph will promote
reduced visibility down to one half mile at times due to blowing
snow. This will be the primary concern through Sunday. By Monday a
strong Bering front is forecast to overspread the Kuskokwim coast
with enhanced southeasterly winds and renewed snow showers. While
accumulations will likely be light, winds gusting to as high as
50 mph will promote a threat for blowing snow and reduced
visibility from Nunivak Island to the Kuskokwim coast through the
morning hours on Monday. Impacts could potentially spread further
inland as well, though some uncertainty remains in the finer
details. Thus, a high wind watch is in effect for the region
Sunday morning, which will be fine tuned over the next 24 hours.

A low centered along the Alaska Peninsula will slowly track out
into the north Pacific today before a second system moves into
Southwest Alaska tonight. The vertically tilted first low extends
its influence northward across Bristol Bay this morning, with
light snow showers ongoing along the coast. These will diminish in
intensity through the morning as the low exits southward slowly,
leaving partly cloudy skies in its wake. Solar heating will bring
high temperatures into the 20s and 30s for much of the region.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 through 3:
Tonight through Tuesday)...

The Bering Sea remains wedged between a broad trough over the
Gulf of Alaska and the next North Pacific low on its way to the
Western Aleutians. A high wind warning has been issued for the
Western Aleutians in anticipation of winds gusting up to 85 mph.
Strong cold air advection wrapping around the deepening low will
support continued strengthening through the morning hours on
Sunday. This should coincide with the low's passage over the
Western Aleutians. Hurricane force southwesterly winds will
precede the low followed by another round of hurricane force
southwesterly winds behind the low as it lifts northward into the
western Bering. Widespread high wind gusts are likely with the
low's passage and resultant seas could build to as high as 40
feet. The Bering low is then forecast to continue across the
central Bering through Monday. Its front will traverse the Central
and Eastern Aleutians Sunday night through Monday afternoon,
reaching the Alaska Peninsula and Southwest Alaska by Monday
evening. All in all, an unsettled weather pattern is forecast
through early next week and widespread gales, storm force winds,
as well as elevated seas, are expected to encompass much of the
Bering late Sunday into Monday. Tuesday will see conditions begin
to relax somewhat, but models are hinting at a Kamchatka low
dropping southward into the western Bering late Tuesday afternoon.

&&

.LONG TERM FORECAST (Days 4 through 7: Wednesday through Saturday)

Active weather looks to continue through the Gulf of Alaska and
coastal Southcentral Alaska through the long-term period. A deep
negatively tilted trough extends southeastward from Siberia,
through Southwest Alaska and the Alaska Peninsula, and into the
North Pacific. Guidance is still in disagreement with strength and
positioning regarding the resultant surface low in the Gulf. The
12z GFS is the strongest of the guidance and the most south with
positioning in the extreme southwestern Gulf on Wednesday. The 12z
Canadian is a middle-ground between the stronger GFS and the
weaker 12z ECMWF. the Canadian and ECMWF guidance have the low in
the vicinity of Kodiak Island. Regardless, it appears that Kodiak
Island, as well as the eastern Kenai Peninsula, Prince William
Sound, and the northern Gulf Coast will see the best chance at
amplified precipitation both from the direct influence of the low
and from its front as it moves north to coast Wednesday through
Thursday. Gale-force winds with potentially storm-force gusts will
be a good bet for the southwestern to south-central Gulf as the
system pulls away to the east Thursday. Another shortwave looks to
approach Southcentral and the Gulf from northwest Friday into
Saturday. However, confidence during this timeframe is extremely
low due to many disagreements in strength and positioning/track of
a potential low pressure system that could develop in the
vicinity of Prince William Sound Friday. However, with north to
northwesterly flow over Southcentral as the upper trough axis
moves into the Gulf, a turn to a colder and potentially drier
pattern could take shape for the beginning of the weekend.

Out west, conditions look to remain unsettled for interior
locations of Southwest Alaska Wednesday as the area contends with
weak shortwaves pivoting back to the west from the upper low in
the Gulf. Meanwhile, another shortwave looks to dig southward from
the from the northern Bering Sea and cause a weak low pressure to
spin up near the Southwest coast/eastern Bering Thursday bringing
another chance at precipitation for coastal locations in the
morning and working into interior Southwest during the evening and
overnight Thursday. Conditions then quiet down for Friday and
Saturday.

The western and central Bering Sea/Aleutian Chain remain relatively
benign in the weather department for most of the long-term period
while the eastern Bering/Aleutian Chain contends with continued
gusty northerly flow through Thursday. However, there is some
uncertainty and questions whether a storm will form in the North
Pacific Wednesday evening; and if it forms, how far north does it
make it. The GFS is the most aggressive with the warm front
skirting the central and eastern Aleutian Chain Thursday and
Friday. Meanwhile, other guidance does not show a storm forming at
all. Guidance is beginning to key in on a Kamchatka low sending
its front eastward towards the western Bering/Aleutian Chain
Friday into Saturday. This will provide increased chances at
precipitation and gusty conditions. Winds look to be only gales at
this time.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...Winter Storm Warning: 125.
         Winter Storm Watch: 155.
         Winter Weather Advisory: 121 161.
         High Wind Warning: 191.
MARINE...Hurricane Force Wind Warning: Central and Western Aleutians.
         Storm Warning: Northern Gulf of Alaska, Central Aleutians,
         Pribilofs.
         Gale Warning: Prince William Sound, Passage Canal,
         Barren Islands, Western Gulf of Alaska, Cook Inlet,
         Eastern Aleutians, Kuskokwim Delta Coast, Saint Matthew Island.
FIRE WEATHER...NONE.

&&

SYNOPSIS AND MODEL DISCUSSION...MF
SOUTHCENTRAL ALASKA...AS
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...BL
LONG TERM...DAN