Small Craft Advisory 260, NWS Juneau, AK

215 
FZAK51 PAJK 062335
CWFAJK

Coastal Waters Forecast for Southeast Alaska
National Weather Service Juneau AK
335 PM AKDT Thu May 6 2021

Southeast Alaska Inside Waters from Dixon Entrance to Skagway

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.

PKZ098-071700-
335 PM AKDT Thu May 6 2021
.SYNOPSIS FOR SOUTHEAST ALASKA INNER CHANNELS COASTAL WATERS...
A low pressure system will move into the Eastern Gulf tonight
and weaken through Friday. As the low weakens, winds and seas
will decrease. Then a front will move north through the area
Saturday. 

$$

PKZ011-071700-
Glacier Bay-
335 PM AKDT Thu May 6 2021

.TONIGHT...NW wind 15 kt becoming SE late. Seas 3 ft. 
.FRI...SE wind 10 kt. Seas 2 ft or less. 
.FRI NIGHT...Light winds. Seas 2 ft or less. Rain showers
late. 
.SAT...SE wind 10 kt. Seas 2 ft or less. Rain showers. 
.SAT NIGHT...Light winds. Seas 2 ft or less. Rain showers. 
.SUN...S wind 15 kt. Seas 3 ft. 
.MON...E wind 10 kt. Seas 2 ft or less. 
.TUE...E wind 10 kt becoming S. Seas building to 3 ft. 

$$

PKZ012-071700-
Northern Lynn Canal-
335 PM AKDT Thu May 6 2021

.TONIGHT...N wind 20 kt becoming SE 10 late. Seas 4 ft in the 
evening then 2 ft or less. 
.FRI...S wind 10 kt. Seas 2 ft or less. Rain showers. 
.FRI NIGHT...Light winds. Seas 2 ft or less. Rain showers. 
.SAT...SE wind 10 kt. Seas 2 ft or less. 
.SAT NIGHT...Light winds. Seas 2 ft or less. Rain showers. 
.SUN...S wind 15 kt. Seas 4 ft. 
.MON...SE wind 15 kt. Seas building to 3 ft. 
.TUE...E wind 10 kt becoming S. Seas building to 3 ft. 

$$

PKZ013-071700-
Southern Lynn Canal-
335 PM AKDT Thu May 6 2021

.TONIGHT...NW wind 20 kt becoming SE 10 late. Seas 4 ft in the 
evening then 2 ft or less. 
.FRI...SE wind 10 kt in the morning becoming light. Seas 2 ft
or less. Showers.
.FRI NIGHT...Light winds becoming SE 10 kt late. Seas 2 ft or
less. 
.SAT...SE wind 10 kt. Seas 2 ft or less. 
.SAT NIGHT...Light winds. Seas 2 ft or less. Showers.
.SUN...Light winds becoming S 10 kt. Seas 4 ft. 
.MON...SE wind 15 kt. Seas building to 3 ft. 
.TUE...SE wind 15 kt. Seas building to 3 ft. 

$$

PKZ021-071700-
Icy Strait-
335 PM AKDT Thu May 6 2021

.TONIGHT...W wind 15 kt becoming E. Seas 3 ft early in the 
evening then 2 ft or less. Showers late. 
.FRI...E wind 10 kt. Seas 2 ft or less. Showers in the
morning. 
.FRI NIGHT...Light winds. Seas 2 ft or less. Rain showers
late. 
.SAT...E wind 10 kt. Seas 2 ft or less. 
.SAT NIGHT...E wind 10 kt. Seas 2 ft or less. Rain showers. 
.SUN...W wind 10 kt. Seas 3 ft. 
.MON...SE wind 10 kt. Seas 2 ft or less. 
.TUE...SE wind 10 kt. Seas 2 ft or less. 

$$

PKZ022-071700-
Cross Sound-
335 PM AKDT Thu May 6 2021

.TONIGHT...E wind 15 kt. Seas 5 ft. Showers late. 
.FRI...E wind 10 kt. Seas 4 ft. Showers in the morning. 
.FRI NIGHT...E wind 10 kt. Seas 5 ft. Showers late. 
.SAT...E wind 10 kt. Seas 5 ft. Showers.
.SAT NIGHT...E wind 10 kt. Seas 5 ft. Showers.
.SUN...SW wind 10 kt. Seas 7 ft. 
.MON...E wind 15 kt. Seas 7 ft. 
.TUE...SE wind 10 kt becoming W. Seas 7 ft. 

$$

PKZ031-071700-
Stephens Passage-
335 PM AKDT Thu May 6 2021

.TONIGHT...N wind 15 kt becoming SE late. Seas 3 ft early in the
evening then 2 ft or less. 
.FRI...Light winds becoming SE 10 kt in the afternoon. Seas
2 ft or less. 
.FRI NIGHT...SE wind 15 kt. Seas building to 3 ft late. 
.SAT...S wind 10 kt. Seas 2 ft or less. 
.SAT NIGHT...S wind 10 kt. Seas 2 ft or less. Showers.
.SUN...S wind 10 kt. Seas 3 ft. 
.MON...S wind 10 kt. Seas 2 ft or less. 
.TUE...S wind 10 kt. Seas 2 ft or less. 

$$

PKZ032-071700-
Northern Chatham Strait-
335 PM AKDT Thu May 6 2021

.TONIGHT...N wind 15 kt. Seas 3 ft. 
.FRI...N wind 15 kt becoming S in the afternoon. Seas 3 ft in
the morning then 2 ft or less. 
.FRI NIGHT...S wind 10 kt. Seas 2 ft or less. 
.SAT...S wind 10 kt. Seas 2 ft or less. 
.SAT NIGHT...S wind 10 kt. Seas 2 ft or less. Rain showers. 
.SUN...S wind 15 kt. Seas 3 ft. 
.MON...S wind 10 kt. Seas 2 ft or less. 
.TUE...S wind 10 kt. Seas 2 ft or less. 

$$

PKZ033-071700-
Southern Chatham Strait-
335 PM AKDT Thu May 6 2021

.TONIGHT...SE wind 15 kt. Seas 3 ft. Near ocean entrances, seas 9
ft. Rain showers. 
.FRI...S wind 10 kt. Seas 3 ft in the morning then 2 ft or
less. Near ocean entrances, seas 7 ft. 
.FRI NIGHT...S wind 10 kt. Seas 2 ft or less, except 6 ft near
ocean entrances. 
.SAT...S wind 10 kt. Seas 2 ft or less, except 6 ft near
ocean entrances. 
.SAT NIGHT...S wind 10 kt. Seas 2 ft or less, except 6 ft
near ocean entrances. Rain showers. 
.SUN...S wind 15 kt. Seas 3 ft. 
.MON...SW wind 10 kt. Seas 2 ft or less. 
.TUE...S wind 10 kt. Seas 2 ft or less. 

$$

PKZ034-071700-
Frederick Sound-
335 PM AKDT Thu May 6 2021

.TONIGHT...E wind 15 kt. Seas 3 ft. Showers in the evening. 
.FRI...E wind 10 kt becoming SW in the afternoon. Seas 2 ft or
less. 
.FRI NIGHT...E wind 10 kt. Seas 2 ft or less. 
.SAT...E wind 10 kt. Seas 2 ft or less. 
.SAT NIGHT...E wind 10 kt. Seas 2 ft or less. Rain showers. 
.SUN...SW wind 15 kt. Seas 3 ft. 
.MON...S wind 10 kt. Seas 2 ft or less. 
.TUE...S wind 10 kt. Seas 2 ft or less. 

$$

PKZ035-071700-
Sumner Strait-
335 PM AKDT Thu May 6 2021

.TONIGHT...E wind 20 kt. Gusts to 35 kt early in the evening.
Seas 4 ft, except 7 ft near ocean entrances. 
.FRI...E wind 15 kt. Seas 3 ft, except 5 ft near ocean
entrances. 
.FRI NIGHT...E wind 10 kt. Seas 2 ft or less, except 5 ft near
ocean entrances. 
.SAT...S wind 15 kt. Seas 3 ft. 
.SAT NIGHT...E wind 10 kt. Seas 2 ft or less. Showers.
.SUN...S wind 10 kt. Seas 2 ft or less. 
.MON...SE wind 10 kt. Seas 2 ft or less. 
.TUE...S wind 10 kt. Seas 2 ft or less. 

$$

PKZ036-071700-
Clarence Strait-
335 PM AKDT Thu May 6 2021

...SMALL CRAFT ADVISORY THROUGH LATE TONIGHT...

.TONIGHT...SE wind 25 kt. Seas 7 ft. Showers late. 
.FRI...SE wind 20 kt. Seas 4 ft, except 7 ft near ocean
entrances. Showers in the morning. 
.FRI NIGHT...SE wind 15 kt. Seas building to 4 ft late. Near
ocean entrances, seas 5 ft. 
.SAT...S wind 20 kt. Seas 5 ft. 
.SAT NIGHT...S wind 10 kt. Seas 3 ft. 
.SUN...S wind 15 kt. Seas 3 ft. 
.MON...SE wind 15 kt. Seas 3 ft. 
.TUE...SE wind 15 kt. Seas 2 ft or less. 

$$

Southeast Alaska Forecast Discussion
National Weather Service Juneau AK
524 AM AKDT Thu May 6 2021

.SHORT TERM...Tonight through Saturday Unsettled weather will
continue through the short term period. A low pressure system will
continue to move northward through the eastern gulf bringing
widespread precipitation to the southern panhandle along with
strong winds and associated waves. Scattered showers are expected
further north as moisture and lift will becomes limited.

Most of the wind and wave impacts will stay to the outside waters
and associated sounds open to the gulf. The tightening
atmospheric pressure gradient associated with the approaching low
will also allow for winds to develop in Lynn Canal creating a
small craft advisory for today. As the low comes closest to the
Southern panhandle strong winds are expected across Prince of
Wales and the southern Inner Channels. This tight gradient will
also cause windy conditions for Downtown Juneau and Douglas.

For precipitation amounts, have kept similar amounts to previous
forecast with the heaviest amounts around a half an inch of liquid
total through Friday.

Have dropped high temperature forecasts for today slightly, with
most locations only going down a few degrees as this system
becomes better represented.

.LONG TERM...Sat through Thu as of 10 PM Wed...Little change in
the forecast reasoning through the extended. Model guidance still
supports an upper low over the Bering Sea persisting into early
next week before weakening, then restrengthening mid to late next
week. This will maintain an active pattern across SE AK through
the extended forecast, but details are difficult to identify as
model solutions diverge in timing and strength of perturbations
ejecting out the parent low and across the gulf.

Current operational runs and ensembles coming into better
agreement with a front moving into the panhandle Sat and again
Mon, but differ slightly in the timing and amount of precip with
these systems. Forecast confidence in active pattern is above
average, but drops in regards to any details into early next week.
Confidence falls to low by mid next week with significant spread
in operational and ensemble guidance.

&&

.AJK WATCHES/WARNINGS/ADVISORIES...
PUBLIC...Strong Wind from 10 AM AKDT this morning through this evening
     for AKZ027.
     Strong Wind until 1 PM AKDT this afternoon for AKZ025.
     Strong Wind from 10 AM AKDT this morning through this evening
     for AKZ028.
MARINE...Small Craft Advisory for PKZ012-013-022-036-041>043.

&&

Suk/BC

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