Small Craft Advisory 231, NWS Juneau, AK

724 
FZAK52 PAJK 171156
CWFAEG

Coastal Waters Forecast for Southeast Alaska
National Weather Service Juneau AK
356 AM AKDT Sat Apr 17 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.

PKZ099-180600-
356 AM AKDT Sat Apr 17 2021
.SYNOPSIS FOR OUTSIDE WATERS...
High pressure over the interior and Yukon will  generate a
strong northerly pressure gradient along the Coast  Mountains
through the weekend. The high will slowly start  shifting to the
east on Sunday.  

$$

PKZ041-180600-
Dixon Entrance to Cape Decision-
356 AM AKDT Sat Apr 17 2021

.TODAY...NE wind 10 kt. Seas 6 ft. 
.TONIGHT...E wind 15 kt. Seas 4 ft. 
.SUN...E wind 15 kt increasing to 25 kt in the afternoon. Seas
6 ft. 
.SUN NIGHT...E wind 20 kt. Seas 8 ft. 
.MON...NW wind 10 kt. Seas 8 ft. 
.TUE...NW wind 20 kt. Seas 8 ft. 
.WED...NW wind 20 kt. Seas 8 ft. 

$$

PKZ042-180600-
Cape Decision to Cape Edgecumbe-
356 AM AKDT Sat Apr 17 2021

.TODAY...N wind 15 kt becoming E in the afternoon. Seas 6 ft. 
.TONIGHT...E wind 20 kt. Seas 5 ft. 
.SUN...E wind 25 kt. Seas 7 ft. 
.SUN NIGHT...E wind 20 kt. Seas 7 ft. 
.MON...S wind 15 kt becoming NW. Seas 8 ft. 
.TUE...NW wind 20 kt. Seas 8 ft. 
.WED...N wind 15 kt. Seas 8 ft. 

$$

PKZ043-180600-
Cape Edgecumbe to Cape Fairweather-
356 AM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY THIS AFTERNOON THROUGH LATE TONIGHT...

.TODAY...NE wind 25 kt. Seas 7 ft. 
.TONIGHT...NE wind 30 kt. Seas 8 ft. 
.SUN...E wind 25 kt. Seas 7 ft. 
.SUN NIGHT...E wind 20 kt. Seas 7 ft. 
.MON...S wind 15 kt becoming W. Seas 8 ft. 
.TUE...W wind 15 kt. Seas 8 ft. 
.WED...NW wind 15 kt. Seas 7 ft. 

$$

PKZ051-180600-
Cape Fairweather to Icy Cape-
356 AM AKDT Sat Apr 17 2021

.TODAY...N wind 10 kt. Seas 5 ft. 
.TONIGHT...E wind 15 kt. Seas 5 ft. 
.SUN...E wind 20 kt. Seas 6 ft. 
.SUN NIGHT...E wind 20 kt. Seas 6 ft. 
.MON...SE wind 15 kt becoming W. Seas 8 ft. 
.TUE...NW wind 10 kt. Seas 7 ft. 
.WED...NW wind 15 kt becoming NE. Seas 7 ft. 

$$

PKZ052-180600-
Icy Cape to Cape Suckling-
356 AM AKDT Sat Apr 17 2021

.TODAY...NW wind 10 kt. Seas 4 ft. 
.TONIGHT...E wind 20 kt. Seas 6 ft. 
.SUN...E wind 20 kt. Seas 7 ft. 
.SUN NIGHT...E wind 20 kt. Seas 7 ft. 
.MON...E wind 20 kt becoming light. Seas 8 ft. 
.TUE...W wind 10 kt. Seas 8 ft. 
.WED...W wind 10 kt becoming light. Seas 6 ft. 

$$

181 
FZAK52 PAJK 172334
CWFAEG

Coastal Waters Forecast for Southeast Alaska
National Weather Service Juneau AK
334 PM AKDT Sat Apr 17 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.

PKZ099-181745-
334 PM AKDT Sat Apr 17 2021
.SYNOPSIS FOR OUTSIDE WATERS...
High pressure over the interior and Yukon will generate a strong 
northerly pressure gradient along the Coast Mountains through the 
weekend. The high will slowly start shifting to the east on 
Sunday. 

$$

PKZ041-181745-
Dixon Entrance to Cape Decision-
334 PM AKDT Sat Apr 17 2021

.TONIGHT...E wind 10 kt early in the evening becoming light. Seas
4 ft. 
.SUN...E wind increasing to 20 kt in the afternoon. Seas 6 ft.
.SUN NIGHT...SE wind 20 kt. Seas 8 ft. 
.MON...SE wind 15 kt. Seas 8 ft. S swell. 
.MON NIGHT...W wind 15 kt. Seas 9 ft. SW swell. 
.TUE...NW wind 20 kt. Seas 9 ft. 
.WED...NW wind 20 kt. Seas 7 ft. 
.THU...NE wind 15 kt. Seas 6 ft. 

$$

PKZ042-181745-
Cape Decision to Cape Edgecumbe-
334 PM AKDT Sat Apr 17 2021

.TONIGHT...E wind 10 kt increasing to 20 kt. Seas 4 ft. 
.SUN...E wind 20 kt. Seas 6 ft. 
.SUN NIGHT...E wind 20 kt. Seas 7 ft. 
.MON...SE wind 15 kt. Seas 8 ft. S swell. 
.MON NIGHT...W wind 15 kt. Seas 9 ft. S swell. 
.TUE...NW wind 20 kt. Seas 9 ft. 
.WED...NW wind 20 kt. Seas 7 ft. 
.THU...NE wind 10 kt. Seas 6 ft. 

$$

PKZ043-181745-
Cape Edgecumbe to Cape Fairweather-
334 PM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY LATE TONIGHT...

.TONIGHT...E wind 20 kt increasing to 25 kt late. Seas 6 ft. 
.SUN...E wind 20 kt. Seas 6 ft. 
.SUN NIGHT...E wind 20 kt. Seas 7 ft. 
.MON...SE wind 20 kt. Seas 8 ft. S swell. 
.MON NIGHT...W wind 10 kt. Seas 9 ft. S swell. 
.TUE...W wind 15 kt. Seas 8 ft. 
.WED...N wind 15 kt. Seas 7 ft. 
.THU...NE wind 15 kt. Seas 7 ft. 

$$

PKZ051-181745-
Cape Fairweather to Icy Cape-
334 PM AKDT Sat Apr 17 2021

.TONIGHT...E wind 15 kt. Seas 4 ft. 
.SUN...E wind 20 kt. Seas 5 ft. 
.SUN NIGHT...E wind 20 kt. Seas 7 ft. 
.MON...E wind 20 kt. Seas 8 ft. 
.MON NIGHT...S wind 10 kt. Seas 9 ft. S swell. 
.TUE...W wind 15 kt. Seas 8 ft. 
.WED...N wind 15 kt. Seas 6 ft. 
.THU...NE wind 10 kt. Seas 7 ft. 

$$

PKZ052-181745-
Icy Cape to Cape Suckling-
334 PM AKDT Sat Apr 17 2021

.TONIGHT...NE wind 10 kt becoming E 20 kt. Seas 3 ft building to
5 ft. 
.SUN...E wind 20 kt. Seas 6 ft. 
.SUN NIGHT...E wind 20 kt. Seas 7 ft. 
.MON...E wind 20 kt. Seas 8 ft. 
.MON NIGHT...S wind 10 kt. Seas 9 ft. S swell. 
.TUE...W wind 10 kt. Seas 8 ft. 
.WED...E wind 10 kt. Seas 6 ft. 
.THU...NE wind 10 kt. Seas 7 ft. 

$$

214 
FZAK52 PAJK 181150
CWFAEG

Coastal Waters Forecast for Southeast Alaska
National Weather Service Juneau AK
350 AM AKDT Sun Apr 18 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.

PKZ099-190600-
350 AM AKDT Sun Apr 18 2021
.SYNOPSIS FOR OUTSIDE WATERS...
High pressure over the interior and Yukon will  slowly start
shifting to the east on Sunday. A front moves into  the central
gulf on Monday. 

$$

PKZ041-190600-
Dixon Entrance to Cape Decision-
350 AM AKDT Sun Apr 18 2021

.TODAY...E wind 20 kt. Seas 6 ft. 
.TONIGHT...E wind 20 kt becoming S late. Seas 6 ft. 
.MON...S wind 15 kt becoming W in the afternoon. Seas 8 ft. SW
swell in the afternoon. 
.MON NIGHT...W wind 15 kt. Seas 9 ft. SW swell. 
.TUE...NW wind 20 kt. Seas 9 ft. 
.WED...NW wind 15 kt. Seas 7 ft. 
.THU...E wind 10 kt. Seas 7 ft. 

$$

PKZ042-190600-
Cape Decision to Cape Edgecumbe-
350 AM AKDT Sun Apr 18 2021

.TODAY...E wind 20 kt. Seas 6 ft. 
.TONIGHT...E wind 20 kt. Seas 7 ft. 
.MON...S wind 15 kt. Seas 8 ft. S swell in the afternoon. 
.MON NIGHT...W wind 15 kt. Seas 9 ft. S swell. 
.TUE...NW wind 20 kt. Seas 9 ft. 
.WED...N wind 20 kt. Seas 7 ft. 
.THU...E wind 10 kt. Seas 7 ft. 

$$

PKZ043-190600-
Cape Edgecumbe to Cape Fairweather-
350 AM AKDT Sun Apr 18 2021

.TODAY...E wind 20 kt. Seas 6 ft. 
.TONIGHT...E wind 20 kt. Seas 6 ft. 
.MON...S wind 15 kt. Seas 8 ft. 
.MON NIGHT...W wind 10 kt. Seas 9 ft. S swell. 
.TUE...W wind 15 kt. Seas 8 ft. 
.WED...NW wind 15 kt. Seas 7 ft. 
.THU...NE wind 15 kt. Seas 7 ft. 

$$

PKZ051-190600-
Cape Fairweather to Icy Cape-
350 AM AKDT Sun Apr 18 2021

.TODAY...E wind 15 kt. Seas 6 ft. 
.TONIGHT...E wind 20 kt. Seas 6 ft. 
.MON...SE wind 15 kt. Seas 7 ft. S swell in the afternoon. 
.MON NIGHT...S wind 10 kt. Seas 9 ft. S swell. 
.TUE...W wind 15 kt. Seas 8 ft. 
.WED...N wind 10 kt. Seas 6 ft. 
.THU...NE wind 10 kt. Seas 7 ft. 

$$

PKZ052-190600-
Icy Cape to Cape Suckling-
350 AM AKDT Sun Apr 18 2021

.TODAY...E wind 20 kt. Seas 6 ft. 
.TONIGHT...E wind 20 kt. Seas 7 ft. 
.MON...SE wind 15 kt. Seas 8 ft. 
.MON NIGHT...SE wind 15 kt. Seas 9 ft. S swell. 
.TUE...W wind 10 kt. Seas 8 ft. 
.WED...W wind 10 kt becoming E. Seas 6 ft. 
.THU...NE wind 10 kt. Seas 7 ft. 

$$

Southeast Alaska Forecast Discussion
National Weather Service Juneau AK
240 PM AKDT Fri Apr 16 2021

.SHORT TERM...Across much of the panhandle today, if you had a
chance to look out a window, or better yet, get outside, you might
have realized that it's an absolutely beautiful day. Furthermore,
in the good news department, these conditions are expected to
continue through the weekend. Ridging over the region will persist
for the next couple of days maintaining sunny skies and a precip
free next couple of days. Even Yakutat, which has been the lone
area today that has seen overcast skies and even a trace of
precip early in the afternoon, should get in on the clearing
Friday evening. High temperatures will continue to be amongst the
warmest in quite a while over the next couple of days this
weekend as well. A couple areas of the southern panhandle may even
challenge for 70 degrees, however the air aloft appears to be
somewhat cooler than thought during previous iterations of the
forecast, limiting, but not eliminating the chances for a few
areas of the north to reach 60. The converse of this and what may
actually aid in keeping the day time highs lower than previously
thought will be that the clear skies at night will allow for ample
radiative cooling. Depending on just how cold the night time lows
become could have an impact on the high the temperatures would
need to rebound to reach those currently in the forecast.

The wind will become a bit of an issue this weekend as high
pressure in Canada will impose a strong pressure gradient over the
northern panhandle. These gusty winds will be mostly noticeable
through Lynn Canal, Haines, Skagway and in downtown Juneau where
a weak mountain wave event will set up. At this point, it does
not appear to be more than a strong wind event, however, gusts to
50 mph may very well be possible. Given the fact that we will be
drying out and melting snow, any material (sand/gravel) from snow
mitigation measures may get blown around, resulting in localized
blowing dust.

.LONG TERM....../Sunday through Friday/...Looking ahead to the
long range forecast time frame, something to keep in mind is the
climate average highs. During the third week of April, climate
average highs around the panhandle range from the upper 40s to
lower 50s. I say this because the long range forecast has a slight
cooling trend, when compared to the upcoming weekend warmth. But
even with the slight cooling trend, the forecast is still calling
for warmer than climate average highs.

Finishing out the weekend in SE AK, Sunday will still have high
pressure in Canada so skies will remain clear and dry over the
panhandle. Highs on Sunday will reach the 60s to near 70 in the
south with 50s to low 60s expected for the central and northern
regions.

Going into next week, model ensemble guidance is showing high
pressure over the panhandle will weaken with hints of a low moving
in from the gulf beyond the 7 day forecast. As high pressure
weakens, high temps will dip a little bit but will still be at or
above the climate averages. Beginning Monday, and lasting through
the weekend, highs will mostly be in the 50s with lows within a
couple degrees of 40.

Precipitation chances are pretty slim overall but there are hints
of a trough that could bring some light precip Monday night to
areas along the coast. But the confidence is low on this due to
low agreement among the models.

&&

.AJK WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Small Craft Advisory for PKZ012-013.

&&

JDR/GJS

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