Storm Warning 21, NWS Juneau, AK

350 
FZAK67 PAJK 200017
OFFAJK

Offshore Waters Forecast
National Weather Service Juneau AK
317 PM AKST Sun Nov 19 2023

Offshore waters forecast for Gulf of Alaska east of 144W

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent the average of the highest
one-third of the combined windwave and swell height.

PKZ398-201830-
317 PM AKST Sun Nov 19 2023
.SYNOPSIS FOR THE EASTERN GULF OF ALASKA...
Northerly outflow winds in the northern Panhandle and northeast
Gulf will intensify on Monday as a strong front moves into the
gulf and panhandle from the south. 

$$

PKZ311-201830-
Gulf of Alaska North of 57 Degrees North and East of 144 W-
317 PM AKST Sun Nov 19 2023

...STORM WARNING MONDAY...

.TONIGHT...Winds light increasing to E 20 kt in the evening, then
increasing to 40 kt late. Seas 6 ft building to 10 ft late. 
.MON...E wind 50 kt. Seas 25 ft. Rain.
.MON NIGHT...E storm force wind to 50 kt. Seas 33 ft. Rain.
.TUE...S gale to 40 kt. Seas 24 ft. 
.TUE NIGHT...S gale to 35 kt diminishing to 25 kt late. Seas
19 ft subsiding to 15 ft late. 
.WED...SE wind 25 kt. Seas 13 ft. 
.THU...S wind 25 kt. Seas 15 ft. 
.FRI...SE wind 20 kt. Seas 15 ft. 

$$

PKZ312-201830-
Gulf of Alaska South of 57 Degrees North and East of 144 W-
317 PM AKST Sun Nov 19 2023

...STORM WARNING TONIGHT THROUGH MONDAY...

.TONIGHT...Winds light increasing to E 30 kt in the evening, then
increasing to 50 kt late. Seas 6 ft building to 12 ft late.
Rain...heavy at times late. 
.MON...E wind 55 kt diminishing to 45 kt in the afternoon.
Seas 27 ft. Rain...heavy at times. 
.MON NIGHT...S gale to 40 kt. Seas 28 ft. Rain.
.TUE...SW gale to 35 kt. Seas 23 ft. 
.TUE NIGHT...S wind 30 kt. Seas 16 ft. 
.WED...SE wind 25 kt. Seas 13 ft. 
.THU...S wind 25 kt. Seas 15 ft. 
.FRI...S wind 20 kt. Seas 16 ft. 

$$

305 
FZAK67 PAJK 201213
OFFAJK

Offshore Waters Forecast
National Weather Service Juneau AK
313 AM AKST Mon Nov 20 2023

Offshore waters forecast for Gulf of Alaska east of 144W

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent the average of the highest
one-third of the combined windwave and swell height.

PKZ398-210615-
313 AM AKST Mon Nov 20 2023
.SYNOPSIS FOR THE EASTERN GULF OF ALASKA...
Very strong Northerly outflow winds in the northern Panhandle
and northeast Gulf will persist through Monday night as a storm
force front moves into the gulf and panhandle from the south.
Winds and seas start to diminish Tuesday as the gulf storm
weakens and moves into the NW gulf. 

$$

PKZ311-210615-
Gulf of Alaska North of 57 Degrees North and East of 144 W-
313 AM AKST Mon Nov 20 2023

...STORM WARNING TODAY THROUGH TONIGHT...

.TODAY...NE wind 40 kt becoming E 50 kt. Seas 12 ft building to
25 ft. Rain.
.TONIGHT...E wind 50 kt. Seas 33 ft. Rain.
.TUE...S gale to 40 kt. Seas 24 ft. 
.TUE NIGHT...S gale to 35 kt diminishing to 25 kt late. Seas
19 ft subsiding to 15 ft late. 
.WED...SE wind 25 kt. Seas 13 ft. 
.THU...S wind 25 kt. Seas 15 ft. 
.FRI...SE wind 20 kt. Seas 15 ft. 

$$

PKZ312-210615-
Gulf of Alaska South of 57 Degrees North and East of 144 W-
313 AM AKST Mon Nov 20 2023

...STORM WARNING THROUGH TODAY...

.TODAY...E wind 55 kt diminishing to 45 kt in the afternoon. Seas
14 ft building to 27 ft. Rain...heavy at times. 
.TONIGHT...S wind 40 kt. Seas 28 ft. Rain.
.TUE...SW gale to 35 kt. Seas 23 ft. 
.TUE NIGHT...S wind 30 kt. Seas 16 ft. 
.WED...SE wind 25 kt. Seas 13 ft. 
.THU...S wind 25 kt. Seas 15 ft. 
.FRI...S wind 20 kt. Seas 16 ft. 

$$

500 
FZAK67 PAJK 210035
OFFAJK

Offshore Waters Forecast
National Weather Service Juneau AK
335 PM AKST Mon Nov 20 2023

Offshore waters forecast for Gulf of Alaska east of 144W

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent the average of the highest
one-third of the combined windwave and swell height.

PKZ398-211845-
335 PM AKST Mon Nov 20 2023
.SYNOPSIS FOR THE EASTERN GULF OF ALASKA...
Storm force front tracking over the AK Gulf and panhandle keeps
very strong northerly and outflow winds through Monday night.
Winds and seas start to diminish Tuesday as the gulf storm
weakens and moves into the NW Gulf. 

$$

PKZ311-211845-
Gulf of Alaska North of 57 Degrees North and East of 144 W-
335 PM AKST Mon Nov 20 2023

...STORM WARNING THROUGH TONIGHT...

.TONIGHT...E wind 50 kt. Seas 32 ft. Rain showers and isolated
thunderstorms. 
.TUE...S wind 40 kt. Seas 24 ft. 
.TUE NIGHT...S gale to 35 kt diminishing to 25 kt late. Seas
19 ft subsiding to 15 ft late. 
.WED...SE wind 30 kt. Seas 11 ft. 
.WED NIGHT...S wind 30 kt. Seas 13 ft. Rain.
.THU...S wind 20 kt. Seas 16 ft. 
.FRI...SE wind 20 kt. Seas 14 ft. 
.SAT...SE wind 20 kt. Seas 10 ft. 

$$

PKZ312-211845-
Gulf of Alaska South of 57 Degrees North and East of 144 W-
335 PM AKST Mon Nov 20 2023

...GALE WARNING THROUGH TUESDAY...

.TONIGHT...SE wind 40 kt. Seas 29 ft. Rain showers and isolated 
thunderstorms.
.TUE...SW wind 35 kt. Seas 23 ft. 
.TUE NIGHT...SW wind 30 kt becoming S 20 kt late. Seas 16 ft.
.WED...S wind 25 kt. Seas 12 ft. Rain in the afternoon. 
.WED NIGHT...S wind 25 kt. Seas 15 ft. Rain.
.THU...S wind 20 kt. Seas 16 ft. 
.FRI...S wind 20 kt. Seas 15 ft. 
.SAT...S wind 20 kt. Seas 10 ft. 

$$

Southeast Alaska Forecast Discussion
National Weather Service Juneau AK
402 PM AKST Sat Nov 18 2023

.SHORT TERM.../Through Monday night/...Showers associated with a
low west of Vancouver Island will shift east into Canada
overnight. As this happens, a significantly colder low level
airmass will move over Southeast Alaska from the west. Evidence of
this already beginning can be seen in temperatures beginning to
slowly fall. At this same time, a strong northerly pressure
gradient will set up over the northern inner channels and aide in
making the near surface airmass even colder. By late Sunday night,
a storm force low will be entering the south central Gulf. A
strong front extending east across the Gulf and over the southern
Panhandle by Monday morning. In this classic overrunning scenario,
Precip will begin as snow and the front will move north over the
Panhandle through Monday night. Snowfall will be heavy at times
and a winter weather watch was issued with the afternoon Forecast.
Snow totals for this 27 hour period of time may reach 10 to 16
inches with the highest totals north of Sumner Strait and south of
the Chilkat Peninsula.

In addition to the expected winter weather, the strength of this
front has prompted a high wind watch for Prince of Wales Island
Monday and Monday night with wind gusts to 60 mph. Apart from
winds associated with the front, the northerly pressure gradient
may result in a mountain wave event for downtown Juneau with gusts
to 50 mph possible.

.LONG TERM.../Tuesday through Friday morning/ As mentioned in the
short range, the storm force low in the Gulf will be moving north
and is expected to turn northwest on Tuesday. Outflow winds will
continue through Tuesday, and combined with the storm force low in
the Gulf, will result in continued gales for most of the inside
waters. For more information on see the Marine Section below. As
the low in the gulf eventually pushes off to the west, rain and
snow showers will continue across the panhandle for the majority
of the week with persistent southerly onshore flow. Overall
looking to be progressively warmer from south to north for most of
the panhandle for the second half of the week as well.

&&

.AVIATION...Across the northern half of the panhandle, skies have
already begun to clear as a system begins moving off to the E.
This trend will continue, with the central and southern panhandle
seeing rising ceilings and widespread MVFR and VFR conditions by
Sunday morning. LLWS associated with the system will depart the
southern panhandle through Saturday night.

The major concern going forward will be a significant northerly
outflow event. Winds will initially begin to increase Saturday
night - reaching small craft conditions in some of the inner
channels - before briefly diminishing in intensity somewhat
during the day on Sunday. The winds will then ramp up again Sunday
night, reaching storm force in Lynn Canal and gale force across
many of the other inner channels on Monday while a storm force
system approaches from the S. Widespread mountain wave activity,
including in Juneau, is anticipated with this northerly outflow
event. Between the advancing system, and the northerly outflow
event, anticipate widespread LLWS will return Monday and Tuesday.

&&

.MARINE...Strong northerly outflow winds will develop in Lynn
Canal beginning late Sunday night building to sustained winds of
up to 50 kt by Monday morning. Winds to gale force are expected
out of the Taku inlet as well as to N Chatham Strait, and blowing
out of Cross Cross Sound. With the location of the storm force
low in the Gulf, similarly strong outflow winds of up to 50 kt are
expected out of Yakutat Bay by Monday morning and gales
persisting through most of Tuesday.

&&

.AJK WATCHES/WARNINGS/ADVISORIES...
PUBLIC...Winter Storm Watch from Monday afternoon through late Monday
     night for AKZ318-319.
     Winter Storm Watch from late Sunday night through late Monday
     night for AKZ320>322-324-325.
     Winter Storm Watch from late Sunday night through Monday morning
     for AKZ326-327.
     High Wind Watch from late Sunday night through late Monday night
     for AKZ328.
MARINE...Small Craft Advisory for PKZ012-013-036-641>644-651-652-661>664-
     671.

&&

SHORT TERM...Fritsch/STJ
LONG TERM....STJ
AVIATION...GFS
MARINE...STJ

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