Small Craft Advisory 461, NWS Anchorage, AK

686 
FZAK52 PAFC 131210
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
410 AM AKDT Wed Jun 13 2018

Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.

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

PKZ199-140115-
410 AM AKDT Wed Jun 13 2018
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A 981 mb North Pacific low moves to 500 nm South of Nikolski at 
961 mb Thu morning then continues to 410 nm South of Dutch Harbor 
at 969 mb for Fri morning. Its front pushes along the Eastern 
Aleutians and Alaska Peninsula by Fri morning. High pressure 
stretches from the Bering Strait to the Western Aleutians through 
Fri morning. 

$$

PKZ150-140115-
South of the AK Peninsula Sitkinak to Castle Cape-
410 AM AKDT Wed Jun 13 2018

...SMALL CRAFT ADVISORY THURSDAY...

.TODAY...SW wind 15 kt. Seas 5 ft.
.TONIGHT...SW wind 15 kt. Seas 5 ft.
.THU...SE wind 20 kt becoming E 30 kt in the afternoon. Seas 6 ft.
.THU NIGHT...E wind 30 kt. Seas 9 ft.
.FRI THROUGH SAT...S wind 25 kt. Seas 16 ft.
.SUN...SE wind 20 kt. Seas 11 ft.

$$

PKZ155-140115-
South of the AK Peninsula Castle Cape to Cape Sarichef-
410 AM AKDT Wed Jun 13 2018

...GALE WARNING THURSDAY...

.TODAY...Variable wind 10 kt. Seas 4 ft.
.TONIGHT...E wind 20 kt. Seas 5 ft.
.THU...E wind 35 kt. Seas 10 ft. Rain.
.THU NIGHT...E wind 35 kt. Seas 13 ft.
.FRI...SE wind 30 kt. Seas 19 ft.
.SAT...S wind 25 kt. Seas 17 ft.
.SUN...SE wind 20 kt. Seas 12 ft.

$$

PKZ160-140115-
Bristol Bay-
410 AM AKDT Wed Jun 13 2018

.TODAY...SW wind 10 kt increasing to 15 kt in the afternoon. Seas
2 ft. Patchy fog.
.TONIGHT...W wind 15 kt becoming SW after midnight. Seas 2 ft.
.THU...S wind 10 kt. Seas 2 ft.
.THU NIGHT...E wind 25 kt. Seas 4 ft.
.FRI...E wind 30 kt. Seas 5 ft.
.SAT...SE wind 25 kt. Seas 5 ft.
.SUN...SE wind 20 kt. Seas 4 ft.

$$

PKZ165-140115-
Port Heiden to Cape Sarichef-
410 AM AKDT Wed Jun 13 2018

...SMALL CRAFT ADVISORY THURSDAY...

.TODAY...Variable wind 10 kt. Seas 2 ft.
.TONIGHT...E wind 15 kt except variable 10 kt from Port Moller E.
Seas 1 foot.
.THU...NE wind 25 kt. From Port Moller E, variable wind 10 kt
becoming NE 20 kt in the afternoon. Seas 4 ft.
.THU NIGHT...E wind 30 kt. Seas 6 ft.
.FRI...E wind 25 kt. Seas 7 ft.
.SAT THROUGH SUN...SE wind 20 kt. Seas 5 ft.

$$

PKZ170-140115-
Cape Sarichef to Nikolski Bering Side-
410 AM AKDT Wed Jun 13 2018

...SMALL CRAFT ADVISORY THURSDAY...

.TODAY...Variable wind 10 kt. Seas 3 ft.
.TONIGHT...NE wind 20 kt. Seas 3 ft.
.THU...NE wind 30 kt. Seas 6 ft.
.THU NIGHT...NE wind 30 kt. Seas 9 ft.
.FRI...NE wind 25 kt. Seas 8 ft.
.SAT...S wind 15 kt. Seas 7 ft.
.SUN...NW wind 15 kt. Seas 5 ft.

$$

PKZ171-140115-
Unalaska Bay-
410 AM AKDT Wed Jun 13 2018

...SMALL CRAFT ADVISORY THURSDAY...

.TODAY...E wind 10 kt increasing to 15 kt in the afternoon. Seas
2 ft.
.TONIGHT...E wind 10 kt. Seas 2 ft.
.THU...E wind 15 kt becoming NE 25 kt in the afternoon. Seas 2 ft
building to 4 ft in the afternoon.
.THU NIGHT...E wind 25 kt. Seas 5 ft.
.FRI...E wind 20 kt. Seas 3 ft.
.SAT...Variable wind less than 10 kt. Seas 2 ft.
.SUN...Variable wind less than 10 kt. Seas 2 ft.

$$

PKZ172-140115-
Cape Sarichef to Nikolski Pacific Side-
410 AM AKDT Wed Jun 13 2018

...GALE WARNING THURSDAY...

.TODAY...E wind 15 kt. Seas 5 ft.
.TONIGHT...NE wind 25 kt. Seas 6 ft.
.THU...NE wind 40 kt. Seas 13 ft. Rain.
.THU NIGHT...E wind 35 kt. Seas 15 ft.
.FRI...E wind 25 kt. Seas 19 ft.
.SAT...SW wind 20 kt. Seas 15 ft.
.SUN...W wind 20 kt. Seas 10 ft.

$$

PKZ173-140115-
Nikolski to Seguam Island Bering Side-
410 AM AKDT Wed Jun 13 2018

...SMALL CRAFT ADVISORY THURSDAY...

.TODAY...Variable wind 10 kt. Seas 4 ft.
.TONIGHT...NE wind 20 kt. Seas 4 ft.
.THU...NE wind 30 kt. Seas 8 ft.
.THU NIGHT...NE wind 30 kt. Seas 11 ft.
.FRI...N wind 30 kt. Seas 13 ft.
.SAT THROUGH SUN...NW wind 20 kt. Seas 9 ft.

$$

PKZ174-140115-
Nikolski to Seguam Island Pacific Side-
410 AM AKDT Wed Jun 13 2018

...GALE WARNING THURSDAY...

.TODAY...E wind 15 kt. Seas 6 ft.
.TONIGHT...NE wind 25 kt. Seas 7 ft.
.THU...NE wind 40 kt. Seas 15 ft.
.THU NIGHT...NE wind 30 kt. Seas 17 ft.
.FRI...N wind 25 kt. Seas 17 ft.
.SAT...W wind 15 kt. Seas 10 ft.
.SUN...NW wind 20 kt. Seas 7 ft.

$$

PKZ175-140115-
Seguam Island to Adak Bering Side-
410 AM AKDT Wed Jun 13 2018

...SMALL CRAFT ADVISORY THURSDAY...

.TODAY...NE wind 15 kt. Seas 4 ft.
.TONIGHT...NE wind 15 kt. Seas 4 ft.
.THU...N wind 30 kt. Seas 7 ft.
.THU NIGHT...N wind 30 kt. Seas 11 ft.
.FRI...N wind 30 kt. Seas 12 ft.
.SAT THROUGH SUN...N wind 20 kt. Seas 10 ft.

$$

PKZ176-140115-
Seguam Island to Adak Pacific Side-
410 AM AKDT Wed Jun 13 2018

...GALE WARNING THURSDAY...

.TODAY...NE wind 20 kt. Seas 6 ft.
.TONIGHT...NE wind 25 kt. Seas 7 ft.
.THU...N wind 35 kt. Seas 12 ft.
.THU NIGHT...N wind 30 kt. Seas 16 ft.
.FRI...NW wind 30 kt. Seas 16 ft.
.SAT THROUGH SUN...NW wind 20 kt. Seas 8 ft.

$$

PKZ177-140115-
Adak to Kiska-
410 AM AKDT Wed Jun 13 2018

...SMALL CRAFT ADVISORY THURSDAY...

.TODAY...NE wind 15 kt. Seas 6 ft.
.TONIGHT...NE wind 15 kt. Seas 6 ft.
.THU...N wind 25 kt. Seas 8 ft.
.THU NIGHT...N wind 25 kt. Seas 9 ft.
.FRI...N wind 25 kt. Seas 11 ft.
.SAT THROUGH SUN...NW wind 20 kt. Seas 8 ft.

$$

PKZ178-140115-
Kiska to Attu-
410 AM AKDT Wed Jun 13 2018

...SMALL CRAFT ADVISORY TONIGHT AND THURSDAY...

.TODAY...NE wind 15 kt. Seas 6 ft.
.TONIGHT...NE wind 15 kt. Seas 8 ft.
.THU...NE wind 15 kt. Seas 8 ft.
.THU NIGHT...NE wind 20 kt. Seas 7 ft.
.FRI...N wind 20 kt. Seas 7 ft.
.SAT THROUGH SUN...NW wind 15 kt. Seas 7 ft.

$$

PKZ179-140115-
Pribilof Islands Near Shore Waters-
410 AM AKDT Wed Jun 13 2018

.TODAY...NE wind 15 kt. Seas 3 ft.
.TONIGHT...NE wind 15 kt. Seas 3 ft. Patchy fog.
.THU...NE wind 20 kt. Seas 4 ft. Areas of fog.
.THU NIGHT...NE wind 25 kt. Seas 6 ft.
.FRI...NE wind 30 kt. Seas 9 ft.
.SAT...N wind 20 kt. Seas 8 ft.
.SUN...N wind 15 kt. Seas 7 ft.

$$

PKZ180-140115-
Kuskokwim Delta and Etolin Strait-
410 AM AKDT Wed Jun 13 2018

.TODAY...NW wind 10 kt. Seas 2 ft.
.TONIGHT...NW wind 15 kt. Seas 2 ft.
.THU...N wind 10 kt becoming NE in the afternoon. Seas 2 ft.
.THU NIGHT...NE wind 25 kt. Seas 5 ft.
.FRI...E wind 30 kt. Seas 7 ft.
.SAT THROUGH SUN...SE wind 20 kt. Seas 5 ft.

$$

PKZ181-140115-
North and West of Nunivak Island-
410 AM AKDT Wed Jun 13 2018

.TODAY...N wind 15 kt. Seas 3 ft.
.TONIGHT...NW wind 15 kt. Seas 3 ft.
.THU...N wind 15 kt. Seas 3 ft.
.THU NIGHT...NE wind 25 kt. Seas 5 ft.
.FRI...NE wind 30 kt. Seas 8 ft.
.SAT...NE wind 25 kt. Seas 8 ft.
.SUN...NE wind 20 kt. Seas 6 ft.

$$

PKZ185-140115-
Saint Matthew Island Waters-
410 AM AKDT Wed Jun 13 2018

.TODAY...Variable wind 10 kt. Seas 3 ft.
.TONIGHT...W wind 15 kt. Seas 3 ft.
.THU...NW wind 15 kt. Seas 4 ft.
.THU NIGHT...NE wind 25 kt. Seas 5 ft.
.FRI...NE wind 30 kt. Seas 9 ft.
.SAT...NE wind 25 kt. Seas 9 ft.
.SUN...N wind 20 kt. Seas 7 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
433 AM AKDT Tue Jun 12 2018

.ANALYSIS AND UPPER LEVELS...
Most of the action this morning is focused over Southcentral and
eastern portions of the state as a deep upper trough originating
from the Arctic continues to bring unseasonably cool and wet
conditions to the area. This system brought impressive
precipitation amounts to Southcentral yesterday with 1.22 inches
of rain falling in Gulkana, which ranks it as the 2nd highest
precip amount for the whole month of June, which fell over only a
24 hour period! Additionally, 4-5" of rain fell near Cordova and
up to 8 inches of snow fell in Eureka. Currently, the upper trough
axis lies right over Southcentral and is slowly pushing east.
Radar shows a broad area of moderate to heavy rain over the Gulf
Coast being enhanced by persistent southerly on-shore flow.
Showers are beginning to wrap up over the Mat-Su/Anchorage areas,
though some showers do remain across Knik Arm.

High pressure with dry northerly flow dominates the southwest
mainland and Bering Sea with clear skies over land and a
widespread area of low stratus and fog seen over the western half
of the Bering Sea and along the northern side of the Aleutians.

&&

.MODEL DISCUSSION...
Models are in good agreement for most of the forecast period with
good consensus on the exiting arctic trough and the arrival of the
next big system coming up from the North Pacific by Thursday
night.

&&

.AVIATION...
PANC...VFR conditions will persist through the TAF period.
Turnagain Arm winds are expected to redevelop later this evening,
but should have a more south/southwest orientation with decent up
inlet flow today.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2)...

The upper arctic trough which brought abundant rain to
Southcentral Monday continues its slow progress eastward. A
secondary and much weaker upper trough moves south across
Southcentral and merges with arctic trough. The whole system then
heads into the eastern Gulf Wednesday night. These features will
tend to continue the threat of showers and even some isolated
thunderstorms over the Copper River Basin this afternoon and early
evening. Conditions will be more stable with fewer showers on
Wednesday with subsidence on the backside of the trough. At the
surface, generally weak low pressure will continue inland today
with weak ridging along the North Gulf Coast. This will give rise
to gusty easterly  winds across Turnagain Arm and with some
sunshine and heating over the Susitna Valley will draw gusty
southeast winds into south and west Anchorage this afternoon and
early evening. Pressure gradients reverse tonight as low pressure
develops along the North Gulf Coast in response to the upper
trough. This will tend to produce gusty westerly outflow winds
over the eastern Kenai Peninsula/Western Prince William Sound and
gusty north winds across the North Gulf coast tonight into
Wednesday morning. These winds will diminish Wednesday afternoon
with weakening pressure gradients.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 to 3)...

In the wake of the recent frontal passage, southwest Alaska
remains in dry and under the influence of northerly flow. At the
onset of this forecast period, southwest is between high pressure
anchored over eastern Russia and an upper-level trough over
eastern Alaska. The arctic vortex will bring another shortwave
into the region later this week. This will be a positive tilted
piece of energy with the upper level heights decreasing late
Wednesday and Thursday. This shortwave will clip the northern
zones of the southwest including the YK Delta and push eastward
before getting absorbed into the longwave pattern. An occluded
front will push across the AKPEN and into southwest late Thursday
and Friday.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 to 3)...

High pressure continues to influence much of the Bering. The
latest ASCAT/advanced scatterometer pass has the center of the surface
circulation near NE Russia with broad anticyclonic north of the
chain. Expect this high to persist over the Bering the entire
forecast period. By Thursday, a developing low will move towards
the Central Aleutians from the north Pacific. This system will
rapidly intensify and develop an occlusion. This system will bring
gale force winds and rough seas to the area.

&&

.LONG TERM FORECAST (Days 3 through 7...Thu through Mon)...
The long term will start with much of southern AK caught between
two systems. To the north, the cold Arctic trough continues to
hang on, even in mid-June. Meanwhile, to the south, another
feature that is somewhat rare this time of year will move toward
the southern mainland. It is a fairly potent storm system made
stronger by incorporating the remnants of former Tropical Storm
Maliksi. So for sensible weather, Thu will see a fair amount of
sunshine across the area with another round of afternoon shower
and some isolated thunderstorms. But by early Fri, the extra-
tropical system will bring widespread moderate rain to Southwest
AK. This rain will reach Cook Inlet and the eastern half of
southern AK by Fri evening. We will be watching the associated QPF
amounts for any potential impacts to rivers across the region.

This system will be strong enough to reorient the entire synoptic
pattern allowing a broad trough to establish itself over the
Eastern Bering into Western AK. The result of this longwave
pattern is a much cloudier and wetter pattern than what we saw to
start June. Temperatures will remain rather seasonal, but
afternoon highs will certainly stay (and feel) a bit colder
without the sunshine and morning lows will likely be a bit warmer
with some clouds for isolation. Models due start to diverge (as
usual) later in the forecast with the ECMWF being the most bullish
on the Eastern Bering trough. But none of the models are painting
any sign of a strong ridge bringing hot and dry conditions to the
southern mainland through early next week. Thus, expect fire
weather concerns to remain low.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...None.

&&

SYNOPSIS AND MODEL DISCUSSION...KVP
SOUTHCENTRAL ALASKA...RC
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...PS
LONG TERM...MO