Small Craft Advisory 238, NWS Juneau, AK

599 
FZAK52 PAJK 231128
CWFAEG

Coastal Waters Forecast for Southeast Alaska
National Weather Service Juneau AK
328 AM AKDT Fri Apr 23 2021

Southeast Alaska Coastal Waters from Dixon Entrance to
Cape Suckling out 100 NM

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

PKZ099-240530-
328 AM AKDT Fri Apr 23 2021
.SYNOPSIS FOR OUTSIDE WATERS...
Low pressure over the Gulf of Alaska and Southeast Alaska will
persist through today. High pressure over northwestern Canada 
will weaken through Saturday night. 

$$

PKZ041-240530-
Dixon Entrance to Cape Decision-
328 AM AKDT Fri Apr 23 2021

.TODAY...NW wind 10 kt becoming E. Seas 6 ft. 
.TONIGHT...E wind 15 kt. Seas 6 ft. 
.SAT...NE wind 15 kt. Seas 5 ft. 
.SAT NIGHT...N wind 15 kt. Seas 6 ft. 
.SUN...N wind 10 kt. Seas 6 ft. 
.MON...W wind 10 kt becoming S. Seas 6 ft. 
.TUE...S wind 20 kt. Seas 9 ft. 

$$

PKZ042-240530-
Cape Decision to Cape Edgecumbe-
328 AM AKDT Fri Apr 23 2021

.TODAY...E wind 15 kt. Seas 7 ft. 
.TONIGHT...E wind 15 kt. Seas 6 ft. 
.SAT...NE wind 15 kt. Seas 6 ft. 
.SAT NIGHT...N wind 15 kt. Seas 6 ft. 
.SUN...N wind 15 kt. Seas 6 ft. 
.MON...NW wind 15 kt becoming S. Seas 6 ft. 
.TUE...SE wind 20 kt. Seas 9 ft. 

$$

PKZ043-240530-
Cape Edgecumbe to Cape Fairweather-
328 AM AKDT Fri Apr 23 2021

...SMALL CRAFT ADVISORY THIS MORNING THROUGH THIS AFTERNOON...

.TODAY...E wind 20 kt. Seas 8 ft. 
.TONIGHT...NE wind 20 kt. Seas 7 ft. 
.SAT...NE wind 15 kt. Seas 6 ft. 
.SAT NIGHT...N wind 15 kt. Seas 6 ft. 
.SUN...NW wind 15 kt. Seas 6 ft. 
.MON...NW wind 15 kt becoming SE. Seas 6 ft. 
.TUE...E wind 20 kt. Seas 9 ft. 

$$

PKZ051-240530-
Cape Fairweather to Icy Cape-
328 AM AKDT Fri Apr 23 2021

.TODAY...E wind 10 kt. Seas 7 ft. 
.TONIGHT...N wind 10 kt. Seas 6 ft. 
.SAT...N wind 10 kt. Seas 5 ft. 
.SAT NIGHT...N wind 10 kt. Seas 5 ft. 
.SUN...NW wind 15 kt. Seas 6 ft. 
.MON...NW wind 10 kt becoming SE. Seas 6 ft. 
.TUE...E wind 20 kt. Seas 9 ft. 

$$

PKZ052-240530-
Icy Cape to Cape Suckling-
328 AM AKDT Fri Apr 23 2021

.TODAY...E wind 10 kt. Seas 7 ft. 
.TONIGHT...Light winds becoming N 10 kt late. Seas 6 ft. 
.SAT...Light winds becoming NW 10 kt in the afternoon. Seas
5 ft. 
.SAT NIGHT...NW wind 10 kt. Seas 5 ft. 
.SUN...W wind 15 kt. Seas 5 ft. 
.MON...W wind 15 kt becoming E. Seas 6 ft. 
.TUE...E wind 20 kt. Seas 8 ft. 

$$

515 
FZAK52 PAJK 240009
CWFAEG

Coastal Waters Forecast for Southeast Alaska
National Weather Service Juneau AK
409 PM AKDT Fri Apr 23 2021

Southeast Alaska Coastal Waters from Dixon Entrance to
Cape Suckling out 100 NM

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

PKZ099-241815-
409 PM AKDT Fri Apr 23 2021
.SYNOPSIS FOR OUTSIDE WATERS...
Low pressure over the Gulf and Southeast Alaska will persist as 
high pressure over northwestern Canada weakens through Saturday 
night. A ridge of high pressure will form over the western Gulf 
Friday night and shift slowly to the east through the weekend. 

$$

PKZ041-241815-
Dixon Entrance to Cape Decision-
409 PM AKDT Fri Apr 23 2021

.TONIGHT...E wind 10 kt. Seas 5 ft. SW swell in the evening. 
.SAT...NE wind 15 kt. Seas 6 ft. 
.SAT NIGHT...N wind 20 kt. Seas 6 ft. SW swell. 
.SUN...N wind 15 kt. Seas 6 ft. SW swell. 
.SUN NIGHT...NW wind 10 kt. Seas 5 ft. W swell. 
.MON...W wind 10 kt becoming S. Seas 6 ft. 
.TUE...S wind 20 kt. Seas 9 ft. 
.WED...S wind 20 kt. Seas 11 ft. 

$$

PKZ042-241815-
Cape Decision to Cape Edgecumbe-
409 PM AKDT Fri Apr 23 2021

.TONIGHT...NE wind 10 kt. Seas 5 ft. S swell in the evening. 
.SAT...N wind 15 kt. Seas 6 ft. 
.SAT NIGHT...N wind 20 kt. Seas 7 ft. SW swell. 
.SUN...NE wind 15 kt. Seas 6 ft. SW swell. 
.SUN NIGHT...NW wind 10 kt. Seas 5 ft. SW swell. 
.MON...NW wind 10 kt becoming S. Seas 6 ft. 
.TUE...SE wind 20 kt. Seas 9 ft. 
.WED...SE wind 20 kt. Seas 12 ft. 

$$

PKZ043-241815-
Cape Edgecumbe to Cape Fairweather-
409 PM AKDT Fri Apr 23 2021

.TONIGHT...NE wind 20 kt. Seas 7 ft. S swell. 
.SAT...N wind 15 kt. Seas 7 ft. 
.SAT NIGHT...N wind 20 kt. Seas 6 ft. SW swell late. 
.SUN...N wind 15 kt. Seas 6 ft. SW swell. 
.SUN NIGHT...NW wind 15 kt. Seas 5 ft. SW swell. 
.MON...NW wind 10 kt becoming SE. Seas 6 ft. 
.TUE...E wind 20 kt. Seas 9 ft. 
.WED...E wind 20 kt. Seas 12 ft. 

$$

PKZ051-241815-
Cape Fairweather to Icy Cape-
409 PM AKDT Fri Apr 23 2021

.TONIGHT...N wind 15 kt. Seas 6 ft. S swell. 
.SAT...NE wind 10 kt. Seas 5 ft. 
.SAT NIGHT...NW wind 10 kt. Seas 5 ft. 
.SUN...NW wind 10 kt. Seas 5 ft. SW swell. 
.SUN NIGHT...NW wind 10 kt. Seas 4 ft. 
.MON...NW wind 10 kt becoming SE. Seas 6 ft. 
.TUE...E wind 20 kt. Seas 9 ft. 
.WED...E wind 15 kt. Seas 11 ft. 

$$

PKZ052-241815-
Icy Cape to Cape Suckling-
409 PM AKDT Fri Apr 23 2021

.TONIGHT...NE wind 10 kt. Seas 6 ft. S swell. 
.SAT...N wind 10 kt in the morning becoming light. Seas
subsiding to 4 ft in the morning. 
.SAT NIGHT...W wind 10 kt. Seas building to 5 ft late. 
.SUN...W wind 10 kt. Seas 5 ft. 
.SUN NIGHT...Light winds. Seas 4 ft. 
.MON...W wind 10 kt becoming E. Seas 6 ft. 
.TUE...E wind 20 kt. Seas 8 ft. 
.WED...E wind 15 kt. Seas 11 ft. 

$$

Southeast Alaska Forecast Discussion
National Weather Service Juneau AK
223 PM AKDT Thu Apr 22 2021

.SHORT TERM.../Through Friday night/...Virtually no change to the
short term forecast from the previous issuance...and no change to
the weather Southeast Alaska is currently experiencing either.
Clear skies will once again result in slightly warmer than normal
daytime highs and somewhat cooler than normal overnight lows. So
even though numerous sites will go below freezing tonight and
Friday night, there is no risk of snow. No rain either, by the
way. But anyone having new plants outdoors will definitely want
to cover them or bring them indoors. Relative humidity values are
quite low - into the upper teens in some spots. This plus the
(relatively) warm daytime highs will aide in continuing to melt
the remaining snow at lower elevations. The ridge that has been
over the eastern Gulf for the past few days will weaken and shift
east during this short range forecast period, but the strong high
pressure over northwest Canada will remain in place for one more
day. Thus, the northerly pressure gradient will last into the
weekend with 10 to 20 mph winds in Haines and Skagway as well as
small craft winds over Lynn Canal at times.

Overnight lows for Thursday and Friday nigh were reduced a few
degrees. Included a slight warming trend to daytime highs going
into the weekend. No other impactful changes. Forecast confidence
is above average.

.LONG TERM.../Sat through Thu as of 10 pm Wed/The upper level
scenario has not changed all that much from yesterday. A strong
upper ridge is still forecast to linger above central Alaska for
the first part of the extended before weakening and getting
replaced by two upper lows that results in general troughing over
Alaska by mid next week. The main changes to this scenario is the
upper ridge persisting about a day more into early next week and
the upper low from the Canadian arctic not moving as far west as
previously depicted. Timing of when the weakening ridge gets
replaced by the upper lows continues to shift and currently favors
a trend toward later in the week so the forecast past Mon remains
at average to low confidence.

For the panhandle, confidence continues to increase that the dry
weather will last likely into Mon now with most operational and
ensemble mean guidance favoring increasing pops for Tue and
beyond. During this dry weather, skies will be mostly clear and
temps will be near, to a little above, normal due to persistent
offshore flow (some of which may get to 15 to 25 kt Sat into Sun
in Lynn Canal, Taku Inlet, and other areas of the northern inner
channels). Little in the way of forecast changes through Sun.

For Mon and beyond, confidence is starting to increase for a
front to impact the areas from the south Tue into Wed. Timing is
still an issue, but there is enough confidence across operational
and ensemble models to start an increase in pops (up to 60 to 70
percent) and winds (up to 25 to 30 kt in the gulf and 15 to 25 kt
for the inner channels) for next Wed. There is still the
possibility of the timing of this front getting pushed later as we
get closer to the event as the forecast upper level pattern
change is still evolving so forecast confidence is still around
average to low.

&&

.AJK WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Small Craft Advisory for PKZ012-022-043-051-052.

&&

FCF/BFL/EAL

Visit us at http://www.weather.gov/Juneau