Alert archive / Alaska / Storm Warnings in 2023

Storm Warning 69, NWS Anchorage, AK

March 23, 2023

NWS Anchorage, AK issued this storm warning at Mar 23, 2023, 4:00 AM AKDT. It was in force for 47 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Mar 23, 2023, 4:00 AM AKDT (12:00 UTC)
Expired
Mar 25, 2023, 3:24 AM AKDT
In force
47 hr
Issued by
NWS Anchorage, AK

The text

As transmitted.

575 
FZAK62 PAFC 231200
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
400 AM AKDT Thu Mar 23 2023

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-240045-
400 AM AKDT Thu Mar 23 2023
.SYNOPSIS FOR CENTRAL BERING SEA...

A 1000 mb low at 60N 172W moves inland Thu evening. Its front 
moves across the Central Bering for Thu night. A front extends off
a Kamchatka low into the western Bering Fri afternoon.

$$

PKZ411-240045-
Bering Sea Offshore West of 180 and East of the International
Dateline-
400 AM AKDT Thu Mar 23 2023

...STORM WARNING FRIDAY...
...HEAVY FREEZING SPRAY WARNING TODAY...

.TODAY...NW wind 15 to 30 kt becoming W up to 20 kt in the
afternoon. Seas 6 to 11 ft. Heavy freezing spray N of 57N in the
morning.
.TONIGHT...SW wind 10 to 25 kt. Seas 5 to 8 ft.
.FRI...S wind 20 to 35 kt increasing to 35 to 50 kt in the
afternoon. Seas 6 to 11 ft building to 9 to 17 ft in the
afternoon.
.FRI NIGHT...S wind 35 to 50 kt. Seas 16 to 24 ft.
.SAT...SW wind 25 to 40 kt. Seas 15 to 23 ft.
.SUN THROUGH MON...S wind 15 to 25 kt. Seas 9 to 17 ft.

$$

PKZ412-240045-
Bering Sea Offshore 171W to 180 and North of 56N-
400 AM AKDT Thu Mar 23 2023

.TODAY...W wind 15 to 30 kt. Seas 9 to 13 ft. Freezing spray.
.TONIGHT...W wind 10 to 25 kt. Seas 7 to 12 ft. Freezing spray N of
57N.
.FRI...S wind 15 to 30 kt. Seas 6 to 10 ft.
.FRI NIGHT...S wind 30 to 45 kt. Seas 10 to 18 ft.
.SAT THROUGH SUN...SW wind 25 to 40 kt. Seas 12 to 20 ft.
.MON...SW wind 15 to 25 kt. Seas 10 ft.

$$

PKZ413-240045-
Bering Sea Offshore 171W to 180 and South of 56N-
400 AM AKDT Thu Mar 23 2023

.TODAY...W wind 10 to 25 kt. Seas 7 to 11 ft.
.TONIGHT...SW wind 10 to 20 kt. Seas 8 ft.
.FRI...SW wind 15 to 30 kt. Seas 7 to 10 ft.
.FRI NIGHT...S wind 25 to 40 kt. Seas 9 to 14 ft.
.SAT THROUGH SUN...SW wind 25 to 40 kt. Seas 9 to 17 ft.
.MON...SW wind 10 to 20 kt. Seas 8 ft.

$$

PKZ414-240045-
Bering Sea Offshore East of 171W-
400 AM AKDT Thu Mar 23 2023

.TODAY...SW wind 15 to 30 kt. Seas 7 to 12 ft. Snow.
.TONIGHT...W wind 10 to 25 kt. Seas 8 to 11 ft. Freezing spray N of
57N.
.FRI...SW wind 10 to 20 kt. Seas 4 to 7 ft.
.FRI NIGHT...S wind 15 to 30 kt. Seas 4 to 8 ft.
.SAT THROUGH SUN...S wind 25 to 40 kt. Seas 8 to 16 ft.
.MON...W wind 10 to 20 kt. Seas 4 to 8 ft.

$$
5 follow-up statements
105 
FZAK62 PAFC 232336
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
336 PM AKDT Thu Mar 23 2023

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-241330-
336 PM AKDT Thu Mar 23 2023
.SYNOPSIS FOR CENTRAL BERING SEA...

A 990 mb Sea of Okhotsk low moves to the North Kamchatka Coast at
957 mb Sat morning, then into the Chukotsk Peninsula at 976 mb 
for Sat afternoon. Its front extends across the Bering and moves to 
the Bering Strait, while the trailing front moves into the Western 
Aleutians by Sat afternoon.

$$

PKZ411-241330-
Bering Sea Offshore West of 180 and East of the International
Dateline-
336 PM AKDT Thu Mar 23 2023

...STORM WARNING FRIDAY NIGHT...

.TONIGHT...SW wind 10 to 25 kt. Seas 5 to 8 ft. Freezing spray.
.FRI...S wind 20 to 30 kt increasing to 30 to 45 kt in the
afternoon. Seas 6 to 11 ft building to 9 to 17 ft in the
afternoon. Freezing spray in the morning. Snow.
.FRI NIGHT...S wind 35 to 50 kt. Seas 15 to 25 ft. Rain and snow.
.SAT...SW wind 20 to 35 kt. Seas 15 to 23 ft.
.SAT NIGHT...SW wind 15 to 30 kt. Seas 14 to 22 ft.
.SUN THROUGH MON...S wind 15 to 25 kt. Seas 9 to 17 ft.
.TUE...SE wind 20 to 35 kt. Seas 8 ft.

$$

PKZ412-241330-
Bering Sea Offshore 171W to 180 and North of 56N-
336 PM AKDT Thu Mar 23 2023

...GALE WARNING FRIDAY NIGHT...

.TONIGHT...W wind 10 to 25 kt. Seas 6 to 11 ft. Freezing spray.
.FRI...S wind 15 to 30 kt. Seas 5 to 10 ft. Freezing spray in the
morning.
.FRI NIGHT...S wind 30 to 45 kt. Seas 11 to 19 ft. Rain.
.SAT...S wind 25 to 40 kt. Seas 14 to 22 ft.
.SAT NIGHT...SW wind 15 to 30 kt. Seas 14 to 18 ft.
.SUN THROUGH MON...SW wind 15 to 30 kt. Seas 10 to 17 ft.
.TUE...SE wind 15 to 30 kt. Seas 8 ft.

$$

PKZ413-241330-
Bering Sea Offshore 171W to 180 and South of 56N-
336 PM AKDT Thu Mar 23 2023

...GALE WARNING FRIDAY NIGHT...

.TONIGHT...SW wind 10 to 20 kt. Seas 8 ft.
.FRI...SW wind 20 to 30 kt. Seas 7 to 10 ft.
.FRI NIGHT...S wind 25 to 40 kt. Seas 9 to 17 ft. Rain.
.SAT...S wind 20 to 35 kt. Seas 11 to 18 ft.
.SAT NIGHT...SW wind 20 to 35 kt. Seas 10 to 16 ft.
.SUN...SW wind 20 to 35 kt. Seas 9 to 16 ft.
.MON...SW wind 10 to 20 kt. Seas 8 ft.
.TUE...SE wind 20 to 35 kt. Seas 7 ft.

$$

PKZ414-241330-
Bering Sea Offshore East of 171W-
336 PM AKDT Thu Mar 23 2023

.TONIGHT...W wind 10 to 25 kt. Seas 8 to 11 ft. Freezing spray.
.FRI...SW wind 10 to 20 kt. Seas 5 to 8 ft.
.FRI NIGHT...SW wind 20 kt becoming S 20 to 30 kt after midnight. 
Seas 5 to 8 ft.
.SAT...S wind 20 to 35 kt. Seas 8 to 13 ft.
.SAT NIGHT...S wind 25 to 35 kt. Seas 8 to 16 ft.
.SUN...S wind 20 to 35 kt. Seas 9 to 16 ft.
.MON...W wind 10 to 20 kt. Seas 4 to 8 ft.
.TUE...SE wind up to 20 kt. Seas 4 to 8 ft.

$$
550 
FZAK62 PAFC 241141
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
341 AM AKDT Fri Mar 24 2023

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-250145-
341 AM AKDT Fri Mar 24 2023
.SYNOPSIS FOR CENTRAL BERING SEA...

A 990 mb Sea of Okhotsk low moves to the north Kamchatka Coast at
957 mb Sat morning, then into the Chukotsk Peninsula at 976 mb 
for Sat afternoon. Its front extends across the Bering and swings 
to the Bering Strait, while the trailing front moves into the 
Western Aleutians by Sat morning.

$$

PKZ411-250145-
Bering Sea Offshore West of 180 and East of the International
Dateline-
341 AM AKDT Fri Mar 24 2023

...STORM WARNING TONIGHT...

.TODAY...S wind 20 to 35 kt increasing to 30 to 45 kt in the
afternoon. Seas 6 to 11 ft building to 9 to 17 ft in the
afternoon.
.TONIGHT...S wind 35 to 50 kt. Seas 15 to 25 ft. Rain and snow.
.SAT...SW wind 25 to 35 kt. Seas 16 to 24 ft.
.SAT NIGHT...SW wind 20 to 30 kt. Seas 15 to 21 ft.
.SUN...W wind 15 to 30 kt. Seas 10 to 18 ft.
.MON THROUGH TUE...S wind 15 to 30 kt. Seas 10 to 18 ft.

$$

PKZ412-250145-
Bering Sea Offshore 171W to 180 and North of 56N-
341 AM AKDT Fri Mar 24 2023

...GALE WARNING TONIGHT AND SATURDAY...

.TODAY...S wind 15 to 30 kt. Seas 6 to 10 ft.
.TONIGHT...S wind 30 to 45 kt. Seas 11 to 19 ft. Rain and snow.
.SAT...S wind 25 to 40 kt. Seas 14 to 22 ft. Rain and snow.
.SAT NIGHT...SW wind 15 to 30 kt. Seas 14 to 20 ft.
.SUN THROUGH MON...W wind 15 to 30 kt. Seas 9 to 17 ft.
.TUE...SE wind 20 to 30 kt. Seas 9 to 14 ft.

$$

PKZ413-250145-
Bering Sea Offshore 171W to 180 and South of 56N-
341 AM AKDT Fri Mar 24 2023

...GALE WARNING TONIGHT AND SATURDAY...

.TODAY...SW wind 20 to 30 kt. Seas 7 to 10 ft.
.TONIGHT...S wind 25 to 40 kt. Seas 9 to 17 ft. Rain.
.SAT...S wind 20 to 35 kt. Seas 12 to 17 ft. Rain.
.SAT NIGHT...SW wind 15 to 30 kt. Seas 10 to 16 ft.
.SUN THROUGH MON...W wind 10 to 25 kt. Seas 8 to 13 ft.
.TUE...S wind 15 to 30 kt. Seas 9 to 17 ft.

$$

PKZ414-250145-
Bering Sea Offshore East of 171W-
341 AM AKDT Fri Mar 24 2023

...GALE WARNING SATURDAY...

.TODAY...SW wind 10 to 20 kt. Seas 5 to 8 ft.
.TONIGHT...S wind 15 to 30 kt. Seas 7 ft.
.SAT...S wind 25 to 40 kt. Seas 8 to 13 ft.
.SAT NIGHT...S wind 20 to 35 kt. Seas 10 to 17 ft.
.SUN...SW wind 20 to 35 kt. Seas 9 to 14 ft.
.MON...W wind 10 to 25 kt. Seas 6 to 11 ft.
.TUE...SE wind 10 to 25 kt. Seas 4 to 7 ft.

$$
795 
FZAK62 PAFC 242337
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
337 PM AKDT Fri Mar 24 2023

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-251315-
337 PM AKDT Fri Mar 24 2023
.SYNOPSIS FOR CENTRAL BERING SEA...

A 996 mb low at 56N 166E moves into the Russian Arctic at 978 mb 
by Sun afternoon. Its front extends across the Central Bering and 
moves to the Chukchi Sea for Sat afternoon, while the trailing 
front slides over the Central Aleutians through Sun afternoon.

$$

PKZ411-251315-
Bering Sea Offshore West of 180 and East of the International
Dateline-
337 PM AKDT Fri Mar 24 2023

...STORM WARNING TONIGHT...

.TONIGHT...S wind 35 to 50 kt. Seas 15 to 25 ft. Rain.
.SAT...SW wind 25 to 35 kt. Seas 16 to 24 ft.
.SAT NIGHT...SW wind 20 to 30 kt. Seas 14 to 21 ft.
.SUN...W wind 30 kt. Seas 13 to 17 ft.
.SUN NIGHT...W wind 15 to 30 kt. Seas 10 to 15 ft.
.MON THROUGH TUE...S wind 15 to 30 kt. Seas 10 to 18 ft.
.WED...SW wind 25 kt. Seas 8 to 13 ft.

$$

PKZ412-251315-
Bering Sea Offshore 171W to 180 and North of 56N-
337 PM AKDT Fri Mar 24 2023

...GALE WARNING THROUGH SATURDAY...

.TONIGHT...S wind 30 to 45 kt. Seas 11 to 19 ft. Rain.
.SAT...S wind 25 to 40 kt. Seas 14 to 22 ft. Rain.
.SAT NIGHT...SW wind 15 to 30 kt. Seas 14 to 19 ft.
.SUN...SW wind 15 to 25 kt. Seas 14 to 18 ft.
.SUN NIGHT...W wind 20 to 30 kt. Seas 12 to 15 ft.
.MON...W wind 15 to 30 kt. Seas 8 to 13 ft.
.TUE...SE wind 20 to 30 kt. Seas 9 to 14 ft.
.WED...SW wind 25 kt. Seas 6 to 11 ft.

$$

PKZ413-251315-
Bering Sea Offshore 171W to 180 and South of 56N-
337 PM AKDT Fri Mar 24 2023

...GALE WARNING THROUGH SATURDAY...

.TONIGHT...S wind 25 to 40 kt. Seas 9 to 17 ft. Rain.
.SAT...S wind 20 to 35 kt. Seas 11 to 17 ft. Rain.
.SAT NIGHT...SW wind 15 to 30 kt. Seas 10 to 15 ft. Rain.
.SUN...W wind 10 to 25 kt. Seas 10 to 14 ft.
.SUN NIGHT...W wind 25 kt. Seas 10 to 13 ft.
.MON...W wind 10 to 25 kt. Seas 7 to 12 ft.
.TUE...S wind 15 to 30 kt. Seas 9 to 17 ft.
.WED...SW wind 25 kt. Seas 7 to 12 ft.

$$

PKZ414-251315-
Bering Sea Offshore East of 171W-
337 PM AKDT Fri Mar 24 2023

...GALE WARNING SATURDAY AND SATURDAY NIGHT...

.TONIGHT...SW wind 20 kt becoming S 20 to 30 kt after midnight. Seas
7 ft.
.SAT...S wind 20 to 35 kt. Seas 8 to 13 ft. Rain.
.SAT NIGHT...S wind 20 to 35 kt. Seas 9 to 16 ft. Rain.
.SUN...SW wind 15 to 30 kt. Seas 10 to 15 ft.
.SUN NIGHT...W wind 10 to 25 kt. Seas 7 to 12 ft.
.MON...W wind 10 to 25 kt. Seas 6 to 11 ft.
.TUE...SE wind 10 to 25 kt. Seas 4 to 7 ft.
.WED...SW wind 25 kt. Seas 5 to 8 ft.

$$
349 
FZAK62 PAFC 251122
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
322 AM AKDT Sat Mar 25 2023

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-260100-
322 AM AKDT Sat Mar 25 2023
.SYNOPSIS FOR CENTRAL BERING SEA...
A 996 mb low at 56N 166E moves into the Russian Arctic at 978 mb 
by Sun afternoon. Its front extends across the Central Bering and 
moves to the Chukchi Sea for Sat afternoon, while the trailing 
front slides over the Central Aleutians through Sun afternoon.

$$

PKZ411-260100-
Bering Sea Offshore West of 180 and East of the International
Dateline-
322 AM AKDT Sat Mar 25 2023

...STORM WARNING TONIGHT...

.TONIGHT...S wind 35 to 50 kt. Seas 15 to 25 ft. Rain.
.SAT...SW wind 25 to 35 kt. Seas 16 to 24 ft.
.SAT NIGHT...SW wind 20 to 30 kt. Seas 14 to 21 ft.
.SUN...W wind 30 kt. Seas 13 to 17 ft.
.SUN NIGHT...W wind 15 to 30 kt. Seas 10 to 15 ft.
.MON THROUGH TUE...S wind 15 to 30 kt. Seas 10 to 18 ft.
.WED...SW wind 25 kt. Seas 8 to 13 ft.

$$

PKZ412-260100-
Bering Sea Offshore 171W to 180 and North of 56N-
322 AM AKDT Sat Mar 25 2023

...GALE WARNING THROUGH SATURDAY...

.TONIGHT...S wind 30 to 45 kt. Seas 11 to 19 ft. Rain.
.SAT...S wind 25 to 40 kt. Seas 14 to 22 ft. Rain.
.SAT NIGHT...SW wind 15 to 30 kt. Seas 14 to 19 ft.
.SUN...SW wind 15 to 25 kt. Seas 14 to 18 ft.
.SUN NIGHT...W wind 20 to 30 kt. Seas 12 to 15 ft.
.MON...W wind 15 to 30 kt. Seas 8 to 13 ft.
.TUE...SE wind 20 to 30 kt. Seas 9 to 14 ft.
.WED...SW wind 25 kt. Seas 6 to 11 ft.

$$

PKZ413-260100-
Bering Sea Offshore 171W to 180 and South of 56N-
322 AM AKDT Sat Mar 25 2023

...GALE WARNING THROUGH SATURDAY...

.TONIGHT...S wind 25 to 40 kt. Seas 9 to 17 ft. Rain.
.SAT...S wind 20 to 35 kt. Seas 11 to 17 ft. Rain.
.SAT NIGHT...SW wind 15 to 30 kt. Seas 10 to 15 ft. Rain.
.SUN...W wind 10 to 25 kt. Seas 10 to 14 ft.
.SUN NIGHT...W wind 25 kt. Seas 10 to 13 ft.
.MON...W wind 10 to 25 kt. Seas 7 to 12 ft.
.TUE...S wind 15 to 30 kt. Seas 9 to 17 ft.
.WED...SW wind 25 kt. Seas 7 to 12 ft.

$$

PKZ414-260100-
Bering Sea Offshore East of 171W-
322 AM AKDT Sat Mar 25 2023

...GALE WARNING SATURDAY AND SATURDAY NIGHT...

.TONIGHT...SW wind 20 kt becoming S 20 to 30 kt after midnight. Seas
7 ft.
.SAT...S wind 20 to 35 kt. Seas 8 to 13 ft. Rain.
.SAT NIGHT...S wind 20 to 35 kt. Seas 9 to 16 ft. Rain.
.SUN...SW wind 15 to 30 kt. Seas 10 to 15 ft.
.SUN NIGHT...W wind 10 to 25 kt. Seas 7 to 12 ft.
.MON...W wind 10 to 25 kt. Seas 6 to 11 ft.
.TUE...SE wind 10 to 25 kt. Seas 4 to 7 ft.
.WED...SW wind 25 kt. Seas 5 to 8 ft.

$$
598 
FZAK62 PAFC 251124
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
324 AM AKDT Sat Mar 25 2023

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-260215-
324 AM AKDT Sat Mar 25 2023
.SYNOPSIS FOR CENTRAL BERING SEA...

A front moves across the Bering Sea through Sun afternoon. High
pressure moves into the western Bering Sun evening. 

$$

PKZ411-260215-
Bering Sea Offshore West of 180 and East of the International
Dateline-
324 AM AKDT Sat Mar 25 2023

...GALE WARNING TODAY...

.TODAY...SW wind 25 to 35 kt. Seas 17 to 24 ft.
.TONIGHT...SW wind 20 to 30 kt. Seas 14 to 21 ft. Snow showers.
.SUN...W wind 25 kt. Seas 14 to 17 ft.
.SUN NIGHT...W wind 10 to 25 kt. Seas 10 to 13 ft.
.MON THROUGH TUE...S wind 30 to 45 kt. Seas 11 to 19 ft.
.WED...W wind 25 to 40 kt. Seas 12 to 17 ft.

$$

PKZ412-260215-
Bering Sea Offshore 171W to 180 and North of 56N-
324 AM AKDT Sat Mar 25 2023

...GALE WARNING TODAY...

.TODAY...S wind 25 to 40 kt. Seas 15 to 23 ft. Rain and light
freezing rain.
.TONIGHT...SW wind 15 to 30 kt. Seas 14 to 19 ft.
.SUN...SW wind 15 to 25 kt. Seas 13 to 17 ft.
.SUN NIGHT...W wind 15 to 25 kt. Seas 11 to 14 ft.
.MON...SW wind 10 to 25 kt. Seas 7 to 12 ft.
.TUE...SE wind 30 to 45 kt. Seas 8 to 16 ft.
.WED...SW wind 15 to 30 kt. Seas 10 to 16 ft.

$$

PKZ413-260215-
Bering Sea Offshore 171W to 180 and South of 56N-
324 AM AKDT Sat Mar 25 2023

...GALE WARNING TODAY...

.TODAY...S wind 20 to 35 kt. Seas 12 to 18 ft. Rain.
.TONIGHT...SW wind 15 to 30 kt. Seas 10 to 15 ft. Rain.
.SUN...W wind 10 to 25 kt. Seas 10 to 13 ft.
.SUN NIGHT...W wind 20 kt. Seas 9 to 12 ft.
.MON...W wind 10 to 25 kt. Seas 5 to 10 ft.
.TUE...S wind 30 to 45 kt. Seas 9 to 17 ft.
.WED...SW wind 30 to 40 kt. Seas 14 to 18 ft.

$$

PKZ414-260215-
Bering Sea Offshore East of 171W-
324 AM AKDT Sat Mar 25 2023

...GALE WARNING THROUGH TONIGHT...

.TODAY...S wind 20 to 35 kt. Seas 8 to 13 ft. Rain and light
freezing rain.
.TONIGHT...S wind 25 to 35 kt diminishing to 15 to 30 kt after
midnight. Seas 9 to 16 ft. Rain and light freezing rain.
.SUN...SW wind 15 to 30 kt. Seas 9 to 14 ft. Rain with snow.
.SUN NIGHT...W wind 10 to 25 kt. Seas 7 to 12 ft.
.MON...N wind up to 15 kt. Seas 5 to 9 ft.
.TUE...E wind 15 to 30 kt. Seas 4 to 7 ft.
.WED...SW wind 15 to 30 kt. Seas 7 to 12 ft.

$$

What forecasters said that day

The local office's own words before this storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Anchorage, AK wrote its last area forecast discussion before this storm warning went out at Mar 22, 5:02 PM AKDT, 10 hours 58 minutes earlier.

Area forecast discussion, Mar 22, 5:02 PM AKDT, 10 hours 58 minutes before
Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
502 PM AKDT Wed Mar 22 2023

.ANALYSIS AND UPPER LEVELS...

A negatively tilted upper level trough extends from the Northern
Bering Sea into the Western Gulf of Alaska. The primary upper
level low and attendant surface low are over Kodiak Island with a
strong front bearing down on the Prince William Sound. With the
slow moving nature of the front hefty snow accumulations can be
seen on webcams and surface observations throughout the Western
Prince William Sound. Blizzard conditions persisted through mid
afternoon along Portage Glacier Road and areas surrounding
Whittier, but have improved slightly since as the precipitation
and winds both begin to diminish. Winds are calmer through the
mountain valleys, but snow is also producing areas of low
visibility throughout the Seward Highway corridor. A deformation
band can also be seen northeast of the low center extending from
Koliganek to southern Bristol Bay. Over the Bering Sea, zonal flow
and cold air aloft continue to stream snow showers into the
eastern Aleutians and Alaska Peninsula.

&&

.MODEL DISCUSSION...

Models are in good agreement in the short term on mesoscale and
synoptic features. Some locational differences exist on a small
but strong low moves into the Y-K delta tomorrow and whether winds
and snow will be coincident and strong enough to produce blowing
snow. The upper level trough associated with this low is expected
to cross the state on Friday, but the north/south location and how
far south the trough is able to dig remains uncertain. This will
impact the precipitation forecast for Southcentral.

&&

.AVIATION...

PANC...VFR conditions will persist. Occasional southerly wind
gusts may move over the terminal; however, southerly winds are
expected to diminish and become light and variable by late
evening. Some light snow may move over the terminal late this
afternoon, which may briefly lower visibility to MVFR, but this is
overall a low probability.

&&

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

An occluded low has pushed just east of Kodiak Island this
evening. Northwest winds downsloping into Kodiak City have been
keeping much of the precipitation as rain, with the bulk of snow
limited to Kodiak Island's western shores. Akhiok has had
persistent snow throughout the day with occasional rain mixing in
with the snow. Subsequent visibilities have been at or below 2
miles for much of the day. As colder temperatures continue to
filter in from the northwest, any lingering rain should change
over to all snow. Off and on snow showers are then expected to
taper off from south to north across Kodiak Island through
midnight as the occluded low gradually lifts further northeast
into the Gulf.

It has also been an active day across Western Prince William
where the occluded low's front continues to lift northward across
the Kenai Peninsula with snow and elevated winds this evening.
Heavy snow and gusty winds did not disappoint with locations from
Whittier into Turnagain Pass experiencing whiteout conditions at
times. The city of Portage had a peak wind gust of 77 mph earlier
in the day, though winds have finally begun to wind down this
evening despite continued snowfall. Heavy snow has been observed
all the way down the Seward Highway corridor as well with the city
of Seward reporting over a foot of snow. Through the rest of the
night snow and winds will eventually come to an end as the
northward moving front gradually weakens and shifts off to the
east through early Thursday morning.

For Friday, a polar trough will skirt the northern fringe of
Southcentral with the resulting thermal gradient to help induce
cyclogenesis over the Susitna Valley. Redeveloping snow showers
will be possible from the Talkeetna's into the Chugach Mountains
as the low dives southward into the Gulf Friday afternoon through
Friday night. Light snow will be possible over the Mat-Valley and
Anchorage Bowl and also into the Copper River Basin and Prince
William Sound areas over the second half of the day into Friday
night. Any low elevation accumulations should be light with
heavier snow confined to the higher elevations. Finally, cold air
advection from the polar trough and developing low over
Southcentral will promote outflow winds late Friday into the
morning hours on Saturday. The usual locations from Seward to
Valdez will be the most susceptible with gusts anywhere from 25 to
35 mph.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (through Saturday morning)...

A band of snow will continue for interior Bristol Bay this
evening, extending up into the Lower Kuskokwim Valley. Further
snowfall amounts should be an inch or less. Colder air filters
back across the southwest Mainland behind the front bringing low
temperatures in the single digits in most areas. Attention quickly
turns to a developing quick-hitting compact low riding along the
ice edge on Thursday which will move toward the Yukon Delta. The
front will spread snow over the Kuskokwim Delta during the morning
hours. As the front passes, winds will turn out of the west and
become gusty as the temperature drops. The combination of falling
snow and winds will create the potential for a short period of
blizzard conditions. The front will move inland quickly Thursday
afternoon and evening bringing the blowing snow threat with it,
and could extend into Aniak in the late evening hours. As the
front progresses eastward snow is possible across the Lower
Kuskokwim Valley through Bristol Bay, mainly along the Alaska
Range. The next active weather will be front from the Bering Sea
bringing southerly winds to the area on Saturday.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (through Saturday
morning)...

Snow showers continue over the central and eastern Bering Sea. A
developing hybrid/polar low will develop quickly in the vicinity
of Saint Matthew Island early Thursday morning. Gale-force winds
will be associated with the front. Cold air filtering down from
the ice pack and gusty winds will create the opportunity for heavy
freezing spray in a narrow corridor closer to the ice edge, with
lighter freezing spray elsewhere. Early Friday, a north Pacific
low and front will bring widespread southerly winds to the Bering
with storm-force winds impacting the western Aleutians and Bering
on Friday.

&&

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

A ridge will build into Southcentral Saturday bringing quieter
weather through Sunday before another Bering Sea front approaches
Sunday into Monday. This creates another problem with possible
precipitation for Southcentral heading into the week due to the
development of a possible surface low in the Gulf. Out west,
northern parts of Bristol Bay into the Kuskokwim Delta region
could get clipped by a Bering low pressure's warm-front Friday
into Saturday. Light precipitation chances would be associated
with the aforementioned front. The cold-front of this Bering low
will track into the Southwest coast by Saturday night into Sunday
morning. Accompanying this front will be gale-force winds with
possible storm-force gusts, especially for the western Aleutians.
As the front progresses eastward throughout the central and
eastern Bering, winds will weaken mostly to low-end gales to high-
end small craft through Sunday morning. Southwest looks to become
unsettled late Saturday night into Monday as the front crosses
southern mainland. There are still a few timing differences
regarding the progression of the front through Southwest during
the week. However, the progressive pattern looks to continue with
no real sustained breaks in activity.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...Blizzard Warning 125.
		 Winter Storm Watch 155.
		 Winter Weather Advisory 171.
MARINE...Storm Warning 734
		 Gale Warning 716 730-733 738 750-753 757 760-762
					  351 352 412.
		 Heavy Freezing Spray Warning 760-762 764 767 412 414.
FIRE WEATHER...NONE.

&&

SYNOPSIS AND MODEL DISCUSSION...CJ
SOUTHCENTRAL ALASKA...BL
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...ML
LONG TERM...NS

The office that day

Everything else NWS Anchorage, AK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 23, 2:39 AM AKDTGale WarningAFC13 hr
Mar 23, 2:39 AM AKDTSmall Craft AdvisoryAFC13 hr
Mar 23, 4:00 AM AKDTHeavy Freezing Spray WarningAFC12 hr
Mar 23, 4:03 AM AKDTBrisk Wind AdvisoryAFC24 hr
Mar 23, 4:03 AM AKDTGale WarningAFC47 hr
Mar 23, 4:03 AM AKDTSmall Craft AdvisoryAFC7 days
Mar 23, 4:03 AM AKDTStorm WarningAFC47 hr
Mar 23, 4:03 AM AKDTHeavy Freezing Spray WarningAFC36 hr
Mar 23, 4:31 AM AKDTWinter Weather AdvisoryAFC17 hr
Mar 23, 3:36 PM AKDTGale WarningAFC47 hr
Mar 23, 3:36 PM AKDTGale WarningAFC47 hr
Mar 23, 3:36 PM AKDTSmall Craft AdvisoryAFC12 days
Mar 23, 3:48 PM AKDTGale WarningAFC24 hr
Mar 23, 3:48 PM AKDTSmall Craft AdvisoryAFC60 hr

Nearby

Storm Warnings in Alaska, 2023Every storm warning in 2023

Sources

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