Small Craft Advisory 596, NWS Juneau, AK

078 
FZAK51 PAJK 272333
CWFAJK

COASTAL WATERS FORECAST FOR SOUTHEAST ALASKA
NATIONAL WEATHER SERVICE JUNEAU AK
400 PM AKDT TUE SEP 27 2016 

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.

PKZ098-281400-
400 PM AKDT TUE SEP 27 2016 
.SYNOPSIS FOR SOUTHEAST ALASKA INNER CHANNELS COASTAL WATERS...
LOW PRESSURE OVER THE SOUTH CENTRAL GULF WILL MOVE SOUTHEAST
TOWARD THE PACIFIC NORTHWEST THROUGH WEDNESDAY. HIGH PRESSURE
WILL BEGIN BUILDING OVER THE YUKON WEDNESDAY NIGHT.  

$$

PKZ011-281400-
GLACIER BAY-
400 PM AKDT TUE SEP 27 2016 

.TONIGHT...SE WIND 15 KT BECOMING N IN THE EVENING. SEAS 3 FT. 
.WED...NW WIND 15 KT DIMINISHING IN THE AFTERNOON. SEAS 3 FT.
.WED NIGHT...NW WIND 10 KT. SEAS 3 FT. 
.THU...NW WIND 20 KT. SEAS 4 FT. 
.THU NIGHT...NW WIND 25 KT. SEAS 5 FT. 
.FRI...NW WIND 30 KT. SEAS 6 FT. 
.SAT...N WIND 30 KT DIMINISHING TO 20 KT. SEAS 6 FT SUBSIDING TO
4 FT.
.SUN...N WIND 15 KT. SEAS 3 FT. 

$$

PKZ012-281400-
NORTHERN LYNN CANAL-
400 PM AKDT TUE SEP 27 2016 

.TONIGHT...S WIND 20 KT BECOMING N 15 KT LATE. SEAS 4 FT. SHOWERS
IN THE EVENING.
.WED...N WIND 20 KT DIMINISHING IN THE AFTERNOON. SEAS 4 FT.
.WED NIGHT...N WIND 15 KT INCREASING TO 20 KT LATE. SEAS
4 FT. 
.THU...N WIND 20 KT INCREASING TO 25 KT IN THE AFTERNOON. 
SEAS BUILDING TO 5 FT. 
.THU NIGHT...N WIND 30 KT. SEAS 6 FT. 
.FRI...N GALE TO 35 KT. SEAS 7 FT. 
.SAT...N GALE TO 40 KT DIMINISHING TO 25 KT. SEAS 8 FT
SUBSIDING TO 5 FT. 
.SUN...N WIND 20 KT. SEAS 4 FT. 

$$

PKZ013-281400-
SOUTHERN LYNN CANAL-
400 PM AKDT TUE SEP 27 2016 

.TONIGHT...SE WIND 15 KT BECOMING N LATE. SEAS 3 FT. SHOWERS.
.WED...N WIND 15 KT DIMINISHING IN THE AFTERNOON. SEAS 3 FT.
.WED NIGHT...N WIND 20 KT. SEAS 4 FT. 
.THU...N WIND 20 KT. SEAS 4 FT. 
.THU NIGHT...N WIND 25 KT. SEAS 5 FT. 
.FRI...N WIND 30 KT. SEAS 6 FT. 
.SAT...N GALE TO 35 KT DIMINISHING TO 20 KT. SEAS 7 FT
SUBSIDING TO 4 FT. 
.SUN...N WIND 20 KT. SEAS 4 FT. 

$$

PKZ021-281400-
ICY STRAIT-
400 PM AKDT TUE SEP 27 2016 

.TONIGHT...E WIND INCREASING TO 20 KT LATE...MAINLY WEST OF POINT
ADOLPHUS. SEAS 4 FT. SHOWERS.
.WED...NE WIND 15 KT BECOMING NW 10 KT IN THE AFTERNOON. SEAS 3
FT.
.WED NIGHT...NW WIND 10 KT. SEAS 2 FT OR LESS. 
.THU...NW WIND 15 KT. SEAS 3 FT. 
.THU NIGHT...NW WIND 20 KT. SEAS 4 FT. 
.FRI...NW WIND 30 KT. SEAS 6 FT. 
.SAT...NW WIND 25 KT BECOMING E 15 KT. SEAS 4 FT. 
.SUN...SE WIND 15 KT BECOMING SW. SEAS 3 FT. 

$$

PKZ022-281400-
CROSS SOUND-
400 PM AKDT TUE SEP 27 2016 

...SMALL CRAFT ADVISORY LATE TONIGHT...

.TONIGHT...E WIND 15 KT INCREASING TO 25 KT LATE. SEAS 5 FT.
SHOWERS.
.WED...NE WIND 20 KT DIMINISHING IN THE AFTERNOON. SEAS 5 FT.
.WED NIGHT...NE WIND 10 KT. SEAS 4 FT. 
.THU...NE WIND 20 KT. SEAS 4 FT. 
.THU NIGHT...NE WIND 25 KT. SEAS 5 FT. 
.FRI...NE WIND 30 KT. SEAS 6 FT. 
.SAT...NE WIND 30 KT BECOMING E 20 KT. SEAS 6 FT. 
.SUN...SE WIND 15 KT. SEAS 6 FT. 

$$

PKZ031-281400-
STEPHENS PASSAGE-
400 PM AKDT TUE SEP 27 2016 

.TONIGHT...SE WIND 15 KT. SEAS 3 FT. SHOWERS.
.WED...NE WIND 15 KT BECOMING NW IN THE AFTERNOON. SEAS 3 FT.
.WED NIGHT...N WIND 15 KT. SEAS 3 FT. 
.THU...N WIND 20 KT. SEAS 4 FT. 
.THU NIGHT...N WIND 25 KT. SEAS 5 FT. 
.FRI...N WIND 30 KT. SEAS 6 FT. 
.SAT...N WIND 25 KT. SEAS 5 FT. 
.SUN...N WIND 20 KT. SEAS 4 FT. 

$$

PKZ032-281400-
NORTHERN CHATHAM STRAIT-
400 PM AKDT TUE SEP 27 2016 

.TONIGHT...SE WIND 15 KT. SEAS 3 FT. SHOWERS.
.WED...NE WIND 15 KT BECOMING NW IN THE AFTERNOON. SEAS 3 FT.
.WED NIGHT...N WIND 10 KT. SEAS 2 FT OR LESS. 
.THU...N WIND 15 KT. SEAS 3 FT. 
.THU NIGHT...N WIND 20 KT. SEAS 4 FT. 
.FRI...N WIND 25 KT. SEAS 5 FT. 
.SAT...N WIND 20 KT. SEAS 4 FT. 
.SUN...N WIND 20 KT. SEAS 4 FT. 

$$

PKZ033-281400-
SOUTHERN CHATHAM STRAIT-
400 PM AKDT TUE SEP 27 2016 

.TONIGHT...SE WIND 20 KT. SEAS 4 FT. SHOWERS.
.WED...NE WIND 20 KT DIMINISHING IN THE AFTERNOON. SEAS 4 FT.
SHOWERS IN THE MORNING.
.WED NIGHT...N WIND 15 KT. SEAS 3 FT. 
.THU...N WIND 10 KT. SEAS 2 FT OR LESS. 
.THU NIGHT...N WIND 15 KT. SEAS 3 FT. 
.FRI...N WIND 25 KT. SEAS 5 FT. 
.SAT...NE WIND 25 KT BECOMING N 15 KT. SEAS 4 FT. 
.SUN...SE WIND 15 KT BECOMING N. SEAS 3 FT. 

$$

PKZ034-281400-
FREDERICK SOUND-
400 PM AKDT TUE SEP 27 2016 

.TONIGHT...SE WIND 15 KT. SEAS 3 FT. SHOWERS.
.WED...NE WIND 15 KT BECOMING NW IN THE AFTERNOON. SEAS 3 FT.
.WED NIGHT...N WIND 15 KT. SEAS 3 FT. 
.THU...N WIND 15 KT. SEAS 3 FT. 
.THU NIGHT...NE WIND 20 KT. SEAS 4 FT. 
.FRI...NE WIND 25 KT. SEAS 5 FT. 
.SAT...NE WIND 30 KT BECOMING N 20 KT. SEAS 5 FT. 
.SUN...SE WIND 20 KT BECOMING SW. SEAS 4 FT. 

$$

PKZ035-281400-
SUMNER STRAIT-
400 PM AKDT TUE SEP 27 2016 

.TONIGHT...E WIND INCREASING TO 20 KT LATE. SEAS 4 FT. SHOWERS.
.WED...E WIND 20 KT BECOMING NW 15 KT IN THE AFTERNOON. SEAS 4
FT.
.WED NIGHT...NW WIND 15 KT. SEAS 3 FT. 
.THU...NW WIND 15 KT. SEAS 3 FT. 
.THU NIGHT...NW WIND 20 KT. SEAS 4 FT. 
.FRI...NE WIND 25 KT. SEAS 5 FT. 
.SAT...NE WIND 25 KT DIMINISHING TO 15 KT. SEAS 4 FT. 
.SUN...E WIND 15 KT BECOMING SW. SEAS 3 FT. 

$$

PKZ036-281400-
CLARENCE STRAIT-
400 PM AKDT TUE SEP 27 2016 

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...SE WIND INCREASING TO 25 KT IN THE LATE EVENING. SEAS
5 FT. SHOWERS EARLY IN THE EVENING.
.WED...SE WIND 20 KT BECOMING N 10 KT IN THE AFTERNOON.
SEAS 4 FT.
.WED NIGHT...N WIND 15 KT. SEAS 4 FT. 
.THU...N WIND 20 KT. SEAS 4 FT. 
.THU NIGHT...N WIND 20 KT. SEAS 4 FT. 
.FRI...NW WIND 15 KT. SEAS 4 FT. 
.SAT...NW WIND 15 KT. SEAS 3 FT. 
.SUN...SE WIND 10 KT BECOMING NW. SEAS 3 FT. 

$$

540 
FZAK51 PAJK 281127
CWFAJK

COASTAL WATERS FORECAST FOR SOUTHEAST ALASKA
NATIONAL WEATHER SERVICE JUNEAU AK
327 AM AKDT WED SEP 28 2016

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.

PKZ098-290245-
327 AM AKDT WED SEP 28 2016
.SYNOPSIS FOR SOUTHEAST ALASKA INNER CHANNELS COASTAL WATERS...
LOW PRESSURE OVER THE SOUTH CENTRAL GULF WILL MOVE SOUTHEAST
TOWARD THE PACIFIC NORTHWEST THROUGH WEDNESDAY. HIGH PRESSURE
WILL BEGIN BUILDING OVER THE YUKON WEDNESDAY NIGHT.  

$$

PKZ011-290245-
GLACIER BAY-
327 AM AKDT WED SEP 28 2016

.TODAY...NW WIND 10 KT. SEAS 2 FT OR LESS. 
.TONIGHT...NW WIND 10 KT. SEAS 2 FT OR LESS. 
.THU...N WIND 15 KT. SEAS 4 FT. 
.THU NIGHT...NW WIND 25 KT. SEAS 5 FT. 
.FRI...NW WIND 30 KT. SEAS 6 FT. 
.SAT...N WIND 30 KT DIMINISHING TO 20 KT. SEAS 5 FT. 
.SUN...N WIND 15 KT. SEAS 3 FT. 

$$

PKZ012-290245-
NORTHERN LYNN CANAL-
327 AM AKDT WED SEP 28 2016

.TODAY...N WIND 15 KT. SEAS 3 FT. 
.TONIGHT...N WIND 15 KT. SEAS 3 FT. 
.THU...N WIND 25 KT. SEAS 5 FT. 
.THU NIGHT...N WIND 30 KT. GUSTS TO 45 KT. SEAS 6 FT. 
.FRI...N GALE TO 35 KT. SEAS 7 FT. 
.SAT...N GALE TO 40 KT DIMINISHING TO 25 KT. SEAS 8 FT
SUBSIDING TO 5 FT. 
.SUN...N WIND 20 KT. SEAS 4 FT. 

$$

PKZ013-290245-
SOUTHERN LYNN CANAL-
327 AM AKDT WED SEP 28 2016

.TODAY...N WIND 15 KT. SEAS 3 FT. 
.TONIGHT...N WIND 15 KT. SEAS 3 FT. 
.THU...N WIND 20 KT. SEAS 4 FT. 
.THU NIGHT...N WIND 30 KT. SEAS 6 FT. 
.FRI...N WIND 30 KT. SEAS 6 FT. 
.SAT...N GALE TO 35 KT DIMINISHING TO 20 KT. SEAS 7 FT
SUBSIDING TO 4 FT. 
.SUN...N WIND 20 KT. SEAS 4 FT. 

$$

PKZ021-290245-
ICY STRAIT-
327 AM AKDT WED SEP 28 2016

.TODAY...NE WIND 20 KT BECOMING NW 10 KT IN THE AFTERNOON. SEAS 4
FT.
.TONIGHT...NW WIND 10 KT. SEAS 2 FT OR LESS. 
.THU...NW WIND 15 KT. SEAS 3 FT. 
.THU NIGHT...NW WIND 25 KT. SEAS 5 FT. 
.FRI...NW WIND 30 KT. SEAS 6 FT. 
.SAT...NW WIND 25 KT BECOMING E 15 KT. SEAS 4 FT. 
.SUN...SE WIND 15 KT BECOMING SW. SEAS 3 FT. 

$$

PKZ022-290245-
CROSS SOUND-
327 AM AKDT WED SEP 28 2016

.TODAY...NE WIND 15 KT. SEAS 5 FT. 
.TONIGHT...N WIND 10 KT. SEAS 4 FT.
.THU...NE WIND 15 KT. SEAS 4 FT. 
.THU NIGHT...NE WIND 25 KT. SEAS 5 FT. 
.FRI...NE WIND 30 KT. SEAS 6 FT. 
.SAT...NE WIND 30 KT BECOMING E 20 KT. SEAS 6 FT. 
.SUN...SE WIND 15 KT. SEAS 7 FT. 

$$

PKZ031-290245-
STEPHENS PASSAGE-
327 AM AKDT WED SEP 28 2016

.TODAY...E WIND 15 KT BECOMING N IN THE MORNING. SEAS 3 FT.
.TONIGHT...N WIND 15 KT. SEAS 3 FT. 
.THU...N WIND 20 KT. SEAS 4 FT. 
.THU NIGHT...N WIND 25 KT. SEAS 5 FT. 
.FRI...N WIND 30 KT. SEAS 6 FT. 
.SAT...N WIND 25 KT. SEAS 5 FT. 
.SUN...N WIND 20 KT. SEAS 4 FT. 

$$

PKZ032-290245-
NORTHERN CHATHAM STRAIT-
327 AM AKDT WED SEP 28 2016

.TODAY...E WIND 15 KT BECOMING N IN THE AFTERNOON. SEAS 3 FT.
SHOWERS EARLY IN THE MORNING. 
.TONIGHT...N WIND 10 KT. SEAS 2 FT OR LESS. 
.THU...N WIND 15 KT. SEAS 3 FT. 
.THU NIGHT...N WIND 25 KT. SEAS 5 FT. 
.FRI...N WIND 25 KT. SEAS 5 FT. 
.SAT...N WIND 20 KT. SEAS 4 FT. 
.SUN...N WIND 20 KT. SEAS 4 FT. 

$$

PKZ033-290245-
SOUTHERN CHATHAM STRAIT-
327 AM AKDT WED SEP 28 2016

.TODAY...E WIND 20 KT BECOMING N 15 KT IN THE AFTERNOON. SEAS 4
FT. SHOWERS IN THE MORNING.
.TONIGHT...N WIND 15 KT. SEAS 3 FT. 
.THU...N WIND 10 KT. SEAS 2 FT OR LESS. 
.THU NIGHT...N WIND 20 KT. SEAS 4 FT. 
.FRI...N WIND 25 KT. SEAS 5 FT. 
.SAT...NE WIND 25 KT BECOMING N 15 KT. SEAS 4 FT. 
.SUN...SE WIND 15 KT BECOMING N. SEAS 3 FT. 

$$

PKZ034-290245-
FREDERICK SOUND-
327 AM AKDT WED SEP 28 2016

.TODAY...E WIND 15 KT BECOMING N IN THE AFTERNOON. SEAS 3 FT.
SHOWERS IN THE MORNING.
.TONIGHT...N WIND 15 KT. SEAS 3 FT. 
.THU...NE WIND 15 KT. SEAS 3 FT. 
.THU NIGHT...NE WIND 25 KT. SEAS 5 FT. 
.FRI...NE WIND 25 KT. SEAS 5 FT. 
.SAT...NE WIND 30 KT BECOMING N 20 KT. SEAS 5 FT. 
.SUN...SE WIND 20 KT BECOMING SW. SEAS 4 FT. 

$$

PKZ035-290245-
SUMNER STRAIT-
327 AM AKDT WED SEP 28 2016

.TODAY...NE WIND 20 KT BECOMING N 15 KT IN THE AFTERNOON. SEAS 4
FT. SHOWERS IN THE MORNING.
.TONIGHT...N WIND 15 KT. SEAS 3 FT. 
.THU...NW WIND 15 KT. SEAS 3 FT. 
.THU NIGHT...NW WIND 20 KT. SEAS 4 FT. 
.FRI...NE WIND 25 KT. SEAS 5 FT. 
.SAT...NE WIND 25 KT DIMINISHING TO 15 KT. SEAS 4 FT. 
.SUN...E WIND 15 KT BECOMING SW. SEAS 3 FT. 

$$

PKZ036-290245-
CLARENCE STRAIT-
327 AM AKDT WED SEP 28 2016

.TODAY...E WIND 20 KT BECOMING N 10 KT IN THE AFTERNOON. SEAS
3 FT. 
.TONIGHT...N WIND 15 KT. SEAS 4 FT. 
.THU...N WIND 20 KT. SEAS 4 FT. 
.THU NIGHT...N WIND 20 KT. SEAS 4 FT. 
.FRI...NW WIND 20 KT. SEAS 4 FT. 
.SAT...NW WIND 15 KT. SEAS 3 FT. 
.SUN...SE WIND 10 KT BECOMING NW. SEAS 3 FT. 

$$

Southeast Alaska Forecast Discussion
National Weather Service Juneau AK
414 PM AKDT MON SEP 26 2016

.SHORT TERM...Surface analysis and satellite imagery indicate a
weakening low over the NE gulf this afternoon with another low
moving into the SW gulf. A trough with the dissipating low
continues to generate convection as it slowly pushes east.
Although thunderstorm activity is much less than previous days, a
few lightning strikes have been detected just outside of Cross
Sound and off Prince of Wales. Modeled convective indices
continue to support TSTM development as this trough pushes inland
tonight, so continued mention of SCHC TSTMs through this evening.

Next forecast challenge is potential for fog development overnight
into Tue. Areas that experienced clearing Sun night had fog
develop this morning with PAYA seeing the best clearing and
thickest fog. Best chance for clearing will again be along the
north gulf coast, but with dissipating low sliding SE, a weak
offshore gradient is expected to develop inhibiting fog
development. Elsewhere, sky cover is expected to remain mostly
cloudy which will inhibit development, so kept mention out of
forecast at this time, but confidence is below average. Plenty of
open cell cumulus stretching across the gulf with continued
onshore flow Tue, so expect scattered showers to persist Tue as
well.

.LONG TERM...Low tracking across the southern gulf will keep
showers in the forecast for most of the panhandle into Wednesday.
The orientation of the pressure pattern will shift the winds
through the inside waters from SE to N-NE Tuesday night. Showers will
tapper off from north to south as flow turns more offshore and the
low settles south of Haida Gwaii through Wed night. On Thursday
high pressure will build over the Yukon and increase the northerly
pressure gradient with the inverted trough over the inside waters.
As a result have winds increasing to small craft level over the
northern inner channels. The pressure packing increases further
on Friday as low pressure pushes back into Hecate Strait and
deepens. Expect strongest northerly outflow winds to occur Friday
night with northern Lynn Canal reaching gale force of 35kt.
Meanwhile an upper level low will drop south across the area
during the day Friday. Will have to watch for Taku wind
ingredients during this timeframe. The upper level low in
conjunction with the surface low over Hecate Strait/Dixon Entrance
will increase the cloud cover and potential for precip as well
over the southern panhandle on Friday. Will need to watch for
weather coming in from the East on this day as well, but dry
northerly outflow should limit precip from making it over the
Coastal Mountains over the northern areas.

Other big story of the week will be temperatures. 850mb temperatures
early Wednesday morning will be around -3C over the northern
panhandle which will make for lows in the low to mid 30s along the
Canadian borders and some places could see frost. The low
pressure moving up from the south looks to bring up warmer
temperatures over the southern panhandle on Thursday, increasing a
thermal gradient along the Coast Mtns. Then Thursday night into
Friday the cold air from Canada pushes south in a big way with the
upper level low. Early Friday morning 850mb temps drop to around
-5C across the north then the below freezing airmass pushes south
into the gulf through the day.

Used an ensemble approach for changes today as models were in good
agreement, but with an emphasis on the 12Z GFS and ECMWF. Forecast
confidence on drying trend with a switch to north winds is above
average.

&&

.AJK Watches/Warnings/Advisories...
PUBLIC...None.
MARINE...Small Craft Advisory due to Seas for PKZ041-042.
&&

BC/Ferrin

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