Alert archive / Alaska / Storm Warnings in 2024

Storm Warning 77, NWS Anchorage, AK

April 8, 2024

NWS Anchorage, AK issued this storm warning at Apr 8, 2024, 3:43 PM AKDT. It was in force for 60 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
Apr 8, 2024, 3:43 PM AKDT (23:43 UTC)
Expired
Apr 11, 2024, 3:46 AM AKDT
In force
60 hr
Issued by
NWS Anchorage, AK

The text

As transmitted.

450 
FZAK62 PAFC 082343
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
343 PM AKDT Mon Apr 8 2024

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.

PKZ499-091245-
343 PM AKDT Mon Apr 8 2024
.SYNOPSIS FOR CENTRAL BERING SEA...

High pressure will prevail over the Aleutians and Bering through 
Tue morning. An trough moves into the Western Aleutians by Tue 
morning, moving slowly east to the Eastern Bering through the 
AKPEN by Wed afternoon.

$$

PKZ411-091245-
Bering Sea Offshore West of 180 and East of the International
Dateline-
343 PM AKDT Mon Apr 8 2024

...STORM WARNING TUESDAY NIGHT...

.TONIGHT...SW wind 15 to 30 kt. Seas 5 to 9 ft.
.TUE...SW wind 20 to 35 kt. Seas 8 to 13 ft.
.TUE NIGHT...S wind 40 to 55 kt. Seas 11 to 18 ft building to 17
to 22 ft after midnight. Rain and snow.
.WED...SW wind 30 to 45 kt. Seas 18 to 22 ft.
.WED NIGHT...SW wind 30 to 45 kt. Seas 16 to 27 ft.
.THU...W wind 25 to 40 kt. Seas 15 to 23 ft.
.FRI THROUGH SAT...W wind up to 20 kt. Seas 5 to 10 ft.

$$

PKZ412-091245-
Bering Sea Offshore 171W to 180 and North of 56N-
343 PM AKDT Mon Apr 8 2024

...STORM WARNING TUESDAY NIGHT...

.TONIGHT...NW wind up to 15 kt becoming W 10 to 25 kt after
midnight. Seas 5 ft.
.TUE...SW wind 15 to 30 kt. Seas 5 to 10 ft.
.TUE NIGHT...SW wind 25 to 35 kt increasing to 35 to 50 kt
after midnight. Seas 10 to 18 ft. Rain and snow.
.WED...SW wind 30 to 45 kt. Seas 14 to 22 ft.
.WED NIGHT...SW wind 20 to 35 kt. Seas 17 to 23 ft.
.THU...W wind 20 to 35 kt. Seas 15 to 25 ft.
.FRI...W wind 15 to 25 kt. Seas 9 to 14 ft.
.SAT...SW wind 10 to 20 kt. Seas 4 to 7 ft.

$$

PKZ413-091245-
Bering Sea Offshore 171W to 180 and South of 56N-
343 PM AKDT Mon Apr 8 2024

...STORM WARNING TUESDAY NIGHT...

.TONIGHT...NW wind 20 kt. Seas 5 to 8 ft.
.TUE...W wind 15 to 25 kt. Seas 6 to 9 ft.
.TUE NIGHT...SW wind 30 kt increasing to 35 to 50 kt after
midnight. Seas 7 to 11 ft building to 10 to 18 ft after
midnight. Rain.
.WED...SW wind 35 to 50 kt. Seas 14 to 22 ft.
.WED NIGHT...SW wind 30 to 45 kt. Seas 18 to 25 ft.
.THU...SW wind 30 to 45 kt. Seas 16 to 24 ft.
.FRI...W wind 15 to 25 kt. Seas 8 to 13 ft.
.SAT...S wind 15 kt. Seas 3 to 7 ft.

$$

PKZ414-091245-
Bering Sea Offshore East of 171W-
343 PM AKDT Mon Apr 8 2024

...HEAVY FREEZING SPRAY WARNING TONIGHT...

.TONIGHT...NW wind 15 to 30 kt. Seas 6 to 11 ft. Extreme freezing spray at a rate 
of 4 cm per hour or greater may rapidly accumulate on vessels.
.TUE...W wind 15 to 30 kt. Seas 4 to 9 ft. Freezing spray.
.TUE NIGHT...W wind 10 to 25 kt. Seas 3 to 8 ft. Snow.
.WED...SW wind 30 to 45 kt. Seas 8 to 13 ft.
.WED NIGHT...SW wind 25 to 35 kt. Seas 12 to 20 ft.
.THU...SW wind 25 to 35 kt. Seas 13 to 21 ft.
.FRI THROUGH SAT...W wind 10 to 25 kt. Seas 6 to 11 ft.

$$
5 follow-up statements
481 
FZAK62 PAFC 091136
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
336 AM AKDT Tue Apr 9 2024

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.

PKZ499-100215-
336 AM AKDT Tue Apr 9 2024
.SYNOPSIS FOR CENTRAL BERING SEA...

A 999 mb South Kamchatka low moves to 59N 180 at 976 mb for Thu 
morning. Its front moves across the Aleutians and Bering and 
trails west to Kamchatka by Thu morning. A 996 mb North Kamchatka 
low moves over the Northern Bering through Thu morning.

$$

PKZ411-100215-
Bering Sea Offshore West of 180 and East of the International
Dateline-
336 AM AKDT Tue Apr 9 2024

...STORM WARNING TONIGHT...

.TODAY...SW wind 20 to 35 kt. Seas 9 to 14 ft.
.TONIGHT...S wind 40 to 55 kt. Seas 11 to 18 ft building to 17 to
22 ft after midnight. Rain and snow.
.WED...SW wind 30 to 45 kt. Seas 19 to 27 ft.
.WED NIGHT...SW wind 35 to 50 kt. Seas 23 to 32 ft.
.THU...NW wind 25 to 40 kt. Seas 14 to 22 ft.
.FRI...SW wind 10 to 20 kt. Seas 6 to 11 ft.
.SAT...S wind up to 15 kt. Seas 5 ft.

$$

PKZ412-100215-
Bering Sea Offshore 171W to 180 and North of 56N-
336 AM AKDT Tue Apr 9 2024

...STORM WARNING TONIGHT...

.TODAY...SW wind 15 to 30 kt. Seas 5 to 10 ft.
.TONIGHT...SW wind 25 to 35 kt increasing to 35 to 50 kt after
midnight. Seas 10 to 18 ft. Rain and snow.
.WED...SW wind 30 to 45 kt. Seas 15 to 22 ft.
.WED NIGHT...SW wind 30 to 45 kt. Seas 19 to 28 ft.
.THU...NW wind 25 to 40 kt. Seas 13 to 28 ft.
.FRI THROUGH SAT...SW wind 10 to 20 kt. Seas 7 to 12 ft.

$$

PKZ413-100215-
Bering Sea Offshore 171W to 180 and South of 56N-
336 AM AKDT Tue Apr 9 2024

...STORM WARNING TONIGHT AND WEDNESDAY...

.TODAY...W wind 15 to 25 kt. Seas 7 ft.
.TONIGHT...SW wind 30 kt increasing to 35 to 50 kt after midnight.
Seas 7 to 11 ft building to 10 to 18 ft after midnight.
.WED...SW wind 35 to 50 kt becoming 45 kt in the afternoon. Seas
14 to 22 ft.
.WED NIGHT...SW wind 35 to 45 kt. Seas 20 to 28 ft.
.THU...W wind 25 to 40 kt. Seas 16 to 24 ft.
.FRI...W wind 10 to 20 kt. Seas 8 to 13 ft.
.SAT...S wind up to 15 kt. Seas 5 ft.

$$

PKZ414-100215-
Bering Sea Offshore East of 171W-
336 AM AKDT Tue Apr 9 2024

...GALE WARNING WEDNESDAY...
...HEAVY FREEZING SPRAY WARNING TODAY... 

.TODAY...W wind 15 to 30 kt. Seas 4 to 9 ft. Heavy freezing spray.
.TONIGHT...W wind 10 to 25 kt. Seas 4 to 9 ft.
.WED...SW wind 25 to 40 kt. Seas 6 to 11 ft building to 9 to 17 ft
in the afternoon. Rain and snow.
.WED NIGHT...SW wind 25 to 35 kt. Seas 12 to 20 ft.
.THU...W wind 25 to 40 kt. Seas 16 to 24 ft.
.FRI...NW wind 10 to 25 kt. Seas 9 to 14 ft.
.SAT...W wind 10 to 20 kt. Seas 6 ft.

$$
696 
FZAK62 PAFC 092207
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
207 PM AKDT Tue Apr 9 2024

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.

PKZ499-101330-
207 PM AKDT Tue Apr 9 2024
.SYNOPSIS FOR CENTRAL BERING SEA...

A Kamchatka low will move to 57N 165E at 965 mb by Wed afternoon, 
and cross to 63N 170W at 979 mb by Thu afternoon, draping a front 
across the western Aleutians by the end of the period. 

$$

PKZ411-101330-
Bering Sea Offshore West of 180 and East of the International
Dateline-
207 PM AKDT Tue Apr 9 2024

...STORM WARNING TONIGHT AND WEDNESDAY NIGHT...

.TONIGHT...S wind 40 to 55 kt. Seas 11 to 18 ft building to 17 to
22 ft after midnight. Rain and snow.
.WED...SW wind 30 to 45 kt. Seas 19 to 27 ft.
.WED NIGHT...SW wind 35 to 50 kt. Seas 23 to 32 ft.
.THU...NW wind 25 to 40 kt. Seas 15 to 26 ft.
.THU NIGHT...NW wind 10 to 20 kt. Seas 10 to 16 ft.
.FRI...SW wind 10 to 20 kt. Seas 6 to 11 ft.
.SAT...S wind up to 15 kt. Seas 5 ft.
.SUN...S wind 15 to 30 kt. Seas 5 to 10 ft.

$$

PKZ412-101330-
Bering Sea Offshore 171W to 180 and North of 56N-
207 PM AKDT Tue Apr 9 2024

...STORM WARNING TONIGHT...

.TONIGHT...SW wind 25 to 35 kt increasing to 35 to 50 kt after
midnight. Seas 10 to 18 ft. Rain and snow.
.WED...SW wind 30 to 45 kt. Seas 15 to 22 ft.
.WED NIGHT...SW wind 30 to 45 kt. Seas 19 to 28 ft. Snow showers.
.THU...W wind 25 to 40 kt. Seas 19 to 29 ft.
.THU NIGHT...NW wind 15 to 30 kt. Seas 12 to 20 ft.
.FRI THROUGH SUN...SW wind 10 to 25 kt. Seas 7 to 12 ft.

$$

PKZ413-101330-
Bering Sea Offshore 171W to 180 and South of 56N-
207 PM AKDT Tue Apr 9 2024

...STORM WARNING THROUGH WEDNESDAY...

.TONIGHT...SW wind 30 kt increasing to 35 to 50 kt after midnight.
Seas 7 to 11 ft building to 10 to 18 ft after midnight.
.WED...SW wind 35 to 50 kt becoming 45 kt in the afternoon. Seas
14 to 22 ft.
.WED NIGHT...SW wind 35 to 45 kt. Seas 20 to 28 ft.
.THU...W wind 25 to 40 kt. Seas 18 to 28 ft.
.THU NIGHT...NW wind 15 to 30 kt. Seas 13 to 21 ft.
.FRI...W wind 10 to 20 kt. Seas 8 to 13 ft.
.SAT THROUGH SUN...S wind up to 20 kt. Seas 5 ft.

$$

PKZ414-101330-
Bering Sea Offshore East of 171W-
207 PM AKDT Tue Apr 9 2024

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

.TONIGHT...W wind 10 to 25 kt. Seas 4 to 9 ft.
.WED...SW wind 25 to 40 kt. Seas 6 to 11 ft building to 9 to 17 ft
in the afternoon. Rain and snow. Freezing spray.
.WED NIGHT...SW wind 25 to 35 kt. Seas 12 to 20 ft.
.THU...SW wind 25 to 40 kt. Seas 14 to 26 ft.
.THU NIGHT...W wind 20 to 35 kt. Seas 15 to 23 ft.
.FRI...NW wind 10 to 25 kt. Seas 9 to 14 ft.
.SAT THROUGH SUN...SW wind 10 to 20 kt. Seas 6 ft.

$$
260 
FZAK62 PAFC 101201
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
401 AM AKDT Wed Apr 10 2024

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.

PKZ499-110030-
401 AM AKDT Wed Apr 10 2024
.SYNOPSIS FOR CENTRAL BERING SEA...

A 980 mb Gulf of Anadyr low dissipates midday Wed. Its front moves 
into Western Alaska for Wed night. A 974 mb Central Kamchatka low 
moves to 65N 161W at 985 mb by Fri morning. Its front sweeps the 
Bering through Fri morning.

$$

PKZ411-110030-
Bering Sea Offshore West of 180 and East of the International
Dateline-
401 AM AKDT Wed Apr 10 2024

...STORM WARNING THROUGH TONIGHT...

.TODAY...SW wind 35 to 50 kt. Seas 19 to 26 ft.
.TONIGHT...SW wind 35 to 50 kt. Seas 21 to 30 ft. Snow showers.
.THU...W wind 25 to 40 kt becoming NW 15 to 30 kt in the
afternoon.
Seas 15 to 26 ft.
.THU NIGHT...NW wind 10 to 25 kt. Seas 10 to 15 ft.
.FRI THROUGH SUN...S wind 20 to 35 kt. Seas 5 to 10 ft.

$$

PKZ412-110030-
Bering Sea Offshore 171W to 180 and North of 56N-
401 AM AKDT Wed Apr 10 2024

...GALE WARNING THROUGH THURSDAY...

.TODAY...SW wind 30 to 45 kt. Seas 15 to 22 ft. Rain.
.TONIGHT...SW wind 35 to 45 kt. Seas 19 to 28 ft. Widespread snow
showers.
.THU...W wind 30 to 45 kt. Seas 19 to 29 ft. Snow showers.
Freezing spray.
.THU NIGHT...NW wind 15 to 30 kt. Seas 12 to 20 ft.
.FRI THROUGH SUN...SW wind 15 to 30 kt. Seas 6 to 11 ft.

$$

PKZ413-110030-
Bering Sea Offshore 171W to 180 and South of 56N-
401 AM AKDT Wed Apr 10 2024

...STORM WARNING TODAY...

.TODAY...SW wind 35 to 50 kt becoming 40 kt in the afternoon. Seas
15 to 23 ft building to 21 ft in the afternoon. Rain.
.TONIGHT...SW wind 35 to 45 kt. Seas 19 to 28 ft.
.THU...W wind 30 to 45 kt. Seas 19 to 28 ft. Snow showers.
.THU NIGHT...NW wind 15 to 30 kt. Seas 13 to 21 ft.
.FRI...W wind 10 to 20 kt. Seas 8 to 13 ft.
.SAT THROUGH SUN...S wind 10 to 25 kt. Seas 4 to 7 ft.

$$

PKZ414-110030-
Bering Sea Offshore East of 171W-
401 AM AKDT Wed Apr 10 2024

...GALE WARNING THROUGH THURSDAY...

.TODAY...SW wind 25 to 40 kt. Seas 6 to 11 ft. Rain and snow.
.TONIGHT...SW wind 25 to 35 kt. Seas 8 to 13 ft.
.THU...SW wind 25 to 40 kt increasing to 35 to 45 kt in the
afternoon. Seas 8 to 16 ft. Snow showers.
.THU NIGHT...W wind 25 to 40 kt. Seas 8 to 16 ft.
.FRI THROUGH SUN...SW wind 10 to 25 kt. Seas 3 to 8 ft.

$$
962 
FZAK62 PAFC 102211
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
211 PM AKDT Wed Apr 10 2024

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.

PKZ499-111245-
211 PM AKDT Wed Apr 10 2024
.SYNOPSIS FOR CENTRAL BERING SEA...

A 964 mb East Pacific low will move east across the Bering to 59N
179W at 975mb by Thu afternoon. A front will extend from the low,
moving across the western and central Aleutians on Thu. The low 
will move inland on Fri with the front sweeping across the eastern
Aleutians and AKPEN by Fri afternoon.


$$

PKZ411-111245-
Bering Sea Offshore West of 180 and East of the International
Dateline-
211 PM AKDT Wed Apr 10 2024

...STORM WARNING TONIGHT...

.TONIGHT...SW wind 35 to 50 kt. Seas 21 to 30 ft. Snow showers.
.THU...W wind 25 to 40 kt becoming NW 15 to 30 kt in the
afternoon. Seas 15 to 26 ft.
.THU NIGHT...NW wind 10 to 25 kt. Seas 10 to 15 ft.
.FRI...W wind 10 to 20 kt. Seas 7 to 11 ft.
.FRI NIGHT...S wind 15 to 25 kt. Seas 7 ft.
.SAT THROUGH MON...SE wind 20 to 35 kt. Seas 5 to 10 ft.

$$

PKZ412-111245-
Bering Sea Offshore 171W to 180 and North of 56N-
211 PM AKDT Wed Apr 10 2024

...GALE WARNING THROUGH THURSDAY...

.TONIGHT...SW wind 35 to 45 kt. Seas 19 to 28 ft. Widespread snow
showers.
.THU...W wind 30 to 45 kt. Seas 19 to 29 ft. Snow showers.
.THU NIGHT...NW wind 15 to 30 kt. Seas 12 to 20 ft. Freezing
spray.
.FRI...W wind 10 to 20 kt. Seas 9 to 14 ft.
.FRI NIGHT...SW wind 15 to 25 kt. Seas 8 ft.
.SAT THROUGH MON...S wind 15 to 30 kt. Seas 6 to 11 ft.

$$

PKZ413-111245-
Bering Sea Offshore 171W to 180 and South of 56N-
211 PM AKDT Wed Apr 10 2024

...GALE WARNING THROUGH THURSDAY...

.TONIGHT...SW wind 35 to 45 kt. Seas 19 to 28 ft.
.THU...W wind 30 to 45 kt. Seas 19 to 28 ft. Snow showers and rain
showers.
.THU NIGHT...NW wind 15 to 30 kt. Seas 13 to 21 ft.
.FRI...NW wind 10 to 20 kt. Seas 9 to 14 ft.
.FRI NIGHT...W wind 15 kt. Seas 6 to 9 ft.
.SAT THROUGH MON...SE wind 15 to 30 kt. Seas 5 to 10 ft.

$$

PKZ414-111245-
Bering Sea Offshore East of 171W-
211 PM AKDT Wed Apr 10 2024

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...SW wind 25 to 35 kt. Seas 8 to 13 ft.
.THU...SW wind 25 to 40 kt increasing to 35 to 45 kt in the
afternoon. Seas 8 to 16 ft. Snow showers.
.THU NIGHT...W wind 30 to 40 kt. Seas 9 to 14 ft. Freezing spray.
.FRI...NW wind 15 to 25 kt. Seas 6 to 11 ft.
.FRI NIGHT...W wind 10 to 25 kt. Seas 3 to 8 ft.
.SAT THROUGH SUN...SW wind 10 to 25 kt. Seas 3 to 6 ft.
.MON...S wind up to 20 kt. Seas 3 to 7 ft.

$$
026 
FZAK62 PAFC 111146
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
346 AM AKDT Thu Apr 11 2024

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.

PKZ499-120130-
346 AM AKDT Thu Apr 11 2024
.SYNOPSIS FOR CENTRAL BERING SEA...

A 973 mb low complex at 62N 176W moves inland near 64N 160W at 
989 mb Fri morning. Its front moves over Western Alaska for Fri 
morning. A ridge moves across the Bering through Sat morning. A 
1019 mb low and front approach the Western Aleutians Sat morning.


$$

PKZ411-120130-
Bering Sea Offshore West of 180 and East of the International
Dateline-
346 AM AKDT Thu Apr 11 2024

...GALE WARNING TODAY...

.TODAY...W wind 25 to 40 kt becoming NW 15 to 30 kt in the
afternoon. Seas 14 to 27 ft.
.TONIGHT...NW wind 10 to 25 kt. Seas 9 to 15 ft.
.FRI...W wind 10 to 20 kt. Seas 9 ft.
.FRI NIGHT...SW wind 10 to 20 kt. Seas 6 ft.
.SAT THROUGH MON...SE wind up to 20 kt. Seas 7 to 12 ft.

$$

PKZ412-120130-
Bering Sea Offshore 171W to 180 and North of 56N-
346 AM AKDT Thu Apr 11 2024

...STORM WARNING TODAY...

.TODAY...SW wind 35 to 50 kt becoming W 25 to 40 kt in the
afternoon. Seas 18 to 30 ft. Snow showers. Freezing spray.
.TONIGHT...NW wind 15 to 30 kt. Seas 13 to 21 ft. Freezing spray.
.FRI...NW wind 10 to 20 kt. Seas 9 to 13 ft. Freezing spray.
.FRI NIGHT...W wind 10 to 25 kt. Seas 8 ft.
.SAT THROUGH SUN...S wind 10 to 25 kt. Seas 3 to 8 ft.
.MON...SE wind up to 15 kt. Seas 11 to 19 ft.

$$

PKZ413-120130-
Bering Sea Offshore 171W to 180 and South of 56N-
346 AM AKDT Thu Apr 11 2024

...STORM WARNING TODAY...

.TODAY...SW wind 40 to 50 kt becoming W 25 to 40 kt in the
afternoon. Seas 18 to 29 ft. Widespread snow showers.
.TONIGHT...W wind 20 to 35 kt becoming NW 15 to 25 kt after
midnight. Seas 13 to 21 ft.
.FRI...NW wind 20 kt. Seas 7 to 12 ft.
.FRI NIGHT...W wind 15 kt. Seas 7 ft.
.SAT...S wind up to 15 kt. Seas 3 to 6 ft.
.SUN...SE wind up to 15 kt. Seas 3 to 8 ft.
.MON...E wind 10 to 20 kt. Seas 9 to 17 ft.

$$

PKZ414-120130-
Bering Sea Offshore East of 171W-
346 AM AKDT Thu Apr 11 2024

...GALE WARNING THROUGH TONIGHT...

.TODAY...SW wind 25 to 40 kt increasing to 35 to 45 kt in the
afternoon. Seas 9 to 17 ft. Snow showers.
.TONIGHT...W wind 30 to 40 kt diminishing to 20 to 30 kt after
midnight. Seas 9 to 14 ft. Freezing spray.
.FRI...NW wind 25 kt. Seas 5 to 10 ft. Freezing spray.
.FRI NIGHT...NW wind 20 kt. Seas 3 to 8 ft.
.SAT THROUGH SUN...SW wind 10 to 25 kt. Seas 3 to 6 ft.
.MON...E wind up to 20 kt. Seas 3 to 8 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 Apr 8, 4:50 AM AKDT, 10 hours 53 minutes earlier.

Area forecast discussion, Apr 8, 4:50 AM AKDT, 10 hours 53 minutes before
Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
450 AM AKDT Mon Apr 8 2024

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

Conditions are generally quiet across Southcentral this morning.
Mostly clear skies dominate from Cook Inlet north into the
Susitna Valley along with scattered cloud cover across the Copper
River Basin associated with the remnants of a weak upper-level
wave moving into the Yukon. A surface low and attendant upper-
level low are situated southwest of Yakutat this morning. These
features are producing scattered showers around the entrance of
Prince William Sound. A weaker upper-level wave is moving
southeast over the Kenai Peninsula and is ushering in some drier
air to its north and west.

As the aforementioned Kenai wave moves southeast, it will slow
and help draw the low in the Gulf back west, making landfall near
Kayak Island. The upper-level low will open into a wave, with a
vorticity lobe moving northwest over the Copper River Basin by
afternoon. Snow showers will become more likely through the day
for Cordova/Valdez, and over the western half of the Copper river
Basin, by Monday afternoon as the wave moves through the region.
Interior areas such as Anchorage and the Mat-Su Valleys will
likely be sheltered from the easterly moving waves, providing for
another nice day. With southwesterly low level flow developing
from Cook Inlet north to the Mat-Su Valleys, though, it is
possible that areas along the foothills of the Chugach and
Talkeetna Mountains see another round of shower activity much like
yesterday afternoon, with rimed snow and/or graupel.

By Tuesday morning, an upper-level Arctic Trough will dive into
Southwest Alaska, building a low pressure system that will cross
the Alaska Peninsula near the Barren Island. this low will be
broad due to the stout upper-level support and will envelop the
low to the northeast, amplifying the conditions across coastal
Southcentral. As such, a return to widespread snowfall will come
to the coast from Seward to Cordova. By this time, cold air will
begin to wrap all the way around the low, ushering a colder air
mass into the Kenai Peninsula up into the Mat-Su from the
southeast. Very cold temperatures aloft (below -40C at 500 mb)
coupled with diurnal heating at the surface will yield a very
unstable atmospheric profile developing near the low towards the
afternoon on Tuesday. This will help fuel vigorous bands of
convective snow showers streaming into the coast, especially along
the eastern Kenai Peninsula and across the Prince William Sound.
Some of this activity will likely spill over the mountains into
interior Southcentral from Tuesday afternoon into Tuesday night,
potentially affecting parts of the Mat Valley, Anchorage and the
eastern parts of the Kenai Peninsula at times. Snowfall
accumulation could vary wildly depending on exactly where bands of
showers train over the same areas, with the best chance for
several inches of accumulation on Tuesday focused near Seward,
Whittier, Valdez and Cordova.

-TM/CL

&&

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

Snow showers chances across the Alaska Peninsula and Eastern
Aleutians will continue into Tuesday morning. There may be brief
periods of reduced visibilities due to blowing snow during snow
showers. Cold air continues to pull southwards over over the
Bering Sea (primarily eastern portions) and Southwest Alaska.
Strong gap winds south of the Alaska Peninsula will reach as high
to 65 knots (75 mph) in some areas. Extreme freezing spray along
the ice edge will continue through tonight for most areas, and
through Tuesday in Bristol Bay. Some areas of heavy freezing spray
could be possible through gaps south of the AKPen.

Conditions will be mostly cold and dry over Southwest until
Wednesday as a low pushes its front west to east across the
Bering Sea towards the Southwest Coast. Models have been trending
the associated front faster over the last few days and seem to be
coming into better agreement with the most recent model runs.
There is a chance for blowing snow or blizzard conditions across
the Kuskokwim Delta and Nunivak Island and the Western Capes of
Bristol Bay as the front moves in. There is a lesser chance for
impactful blowing snow across the Aleutians as warm air quickly
follows the front, however, there may be a quick shot of
snow/winds ahead of the warm air. Additionally, storm force winds
and widespread gales are expected in the western/central Bering
Sea along the front.

-KM

&&

.LONG TERM FORECAST (Days 4 through 7) Thursday through
Sunday...

Long term models are in relatively good agreement with the
amplification of a large upper low over the Bering on Thursday.
Several shortwaves digging around the low will bring it across
Southwest and into Southcentral into early Friday. A cold air mass
will remain in place across the Bering with gusty conditions
persisting along the Aleutian Chain and the potential for a winter
storm to push across the Kuskokwim Delta, the Lower Kuskokwim
Valley, and the Greater Bristol Bay regions during the same time
frame. This system will be the primary focus and concern during
the long term period as cold air over the Bering wraps around the
low into the Gulf and across Southcentral as well. With Anchorage
still in the running to have the snowiest winter on record,
Thursday could prove fruitful with a round of accumulating snow,
with widespread snow showers spreading across Southcentral. Due to
the nature of the expected airmass, lapse rates will be quite
steep, further supporting the notion of numerous snow showers
spilling over from Southwest Alaska into Southcentral. The
Canadian forecast model is the most bullish with the strength of
the trough moving into interior Alaska, with the GFS not far
behind. Still, it remains just far enough out in time that
forecast confidence will remain low until further run-to-run
consistency within model guidance is observed.

BL

&&

.AVIATION...

PANC...VFR conditions and light will persist. Isolated showers may
develop along the Anchorage Hillside and foothills of the Chugach
Mountains Tuesday afternoon and evening. However, any shower
activity should stay along the higher terrain and away from the
terminal.

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 8, 3:21 AM AKDTGale WarningAFC11 hr
Apr 8, 3:21 AM AKDTSmall Craft AdvisoryAFC72 hr
Apr 8, 3:50 AM AKDTBrisk Wind AdvisoryAFC24 hr
Apr 8, 3:50 AM AKDTGale WarningAFC12 hr
Apr 8, 3:50 AM AKDTSmall Craft AdvisoryAFC47 hr
Apr 8, 3:50 AM AKDTHeavy Freezing Spray WarningAFC24 hr
Apr 8, 3:54 AM AKDTGale WarningAFC12 hr
Apr 8, 2:22 PM AKDTSmall Craft AdvisoryAFC12 hr
Apr 8, 3:55 PM AKDTGale WarningAFC35 hr
Apr 8, 3:55 PM AKDTStorm WarningAFC35 hr
Apr 8, 3:55 PM AKDTHeavy Freezing Spray WarningAFC12 hr
Apr 8, 3:59 PM AKDTWinter Storm WatchAFC12 hr

Nearby

Storm Warnings in Alaska, 2024Every storm warning in 2024

Sources

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