Gale Warning 195, NWS Anchorage, AK

112 
FZAK62 PAFC 232336
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
336 PM AKDT THU MAR 23 2017

OFFSHORE WATERS FORECAST FOR THE BERING SEA

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.

PKZ499-241345-
336 PM AKDT THU MAR 23 2017
.SYNOPSIS FOR CENTRAL BERING SEA...
BOGOSLOF VOLCANO AT 54N 168W REMAINS ACTIVE. A FRONT OVER THE
NORTH PACIFIC WILL LIFT NORTHWARD TOWARD THE ALEUTIAN CHAIN 
THROUGH FRI NIGHT THEN BEGIN TO WEAKEN JUST SOUTH OF THE CHAIN 
ON SAT.

$$

PKZ411-241345-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
336 PM AKDT THU MAR 23 2017

...GALE WARNING FRIDAY AND FRIDAY NIGHT...

.TONIGHT...E WIND 15 TO 30 KT. SEAS 6 TO 11 FT.
.FRI...E WIND 25 TO 35 KT. SEAS 9 TO 17 FT.
.FRI NIGHT...E WIND 25 TO 35 KT. SEAS 12 TO 18 FT. SNOW AND RAIN.
.SAT...E WIND 25 TO 35 KT. SEAS 15 TO 18 FT.
.SAT NIGHT...E WIND 25 TO 35 KT. SEAS 14 TO 18 FT.
.SUN THROUGH TUE...E WIND 20 TO 30 KT. SEAS 9 TO 17 FT.

$$

PKZ412-241345-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
336 PM AKDT THU MAR 23 2017

.TONIGHT...E WIND 15 TO 25 KT. SEAS 4 TO 7 FT. FREEZING SPRAY.
.FRI...E WIND 20 TO 30 KT. SEAS 6 TO 11 FT. FREEZING SPRAY.
.FRI NIGHT...E WIND 30 KT. SEAS 9 TO 15 FT. FREEZING SPRAY.
.SAT...E WIND 30 KT. SEAS 10 TO 15 FT.
.SAT NIGHT...E WIND 30 KT. SEAS 10 TO 15 FT.
.SUN THROUGH TUE...NE WIND 30 KT. SEAS 8 TO 13 FT.

$$

PKZ413-241345-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
336 PM AKDT THU MAR 23 2017

...GALE WARNING FRIDAY AND FRIDAY NIGHT...

.TONIGHT...E WIND 20 TO 30 KT. SEAS 5 TO 10 FT.
.FRI...E WIND 30 TO 40 KT. SEAS 9 TO 17 FT.
.FRI NIGHT...E WIND 35 KT. SEAS 13 TO 18 FT.
.SAT...E WIND 35 KT. SEAS 13 TO 18 FT.
.SAT NIGHT...E WIND 35 KT. SEAS 13 TO 18 FT.
.SUN THROUGH TUE...NE WIND 25 TO 35 KT. SEAS 9 TO 17 FT.

$$

PKZ414-241345-
BERING SEA OFFSHORE EAST OF 171W-
336 PM AKDT THU MAR 23 2017

.TONIGHT...E WIND 10 TO 25 KT. SEAS IN ICE FREE WATERS 1 TO 6 FT.
FREEZING SPRAY.
.FRI...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 7 FT.
FREEZING SPRAY.
.FRI NIGHT...E WIND 20 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8
FT. FREEZING SPRAY.
.SAT...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
.SAT NIGHT...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8
FT.
.SUN THROUGH TUE...N WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 4
TO 9 FT.

$$

270 
FZAK62 PAFC 241123
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
323 AM AKDT FRI MAR 24 2017

OFFSHORE WATERS FORECAST FOR THE BERING SEA

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.

PKZ499-250245-
323 AM AKDT FRI MAR 24 2017
.SYNOPSIS FOR CENTRAL BERING SEA...
BOGOSLOF VOLCANO AT 54N 168W REMAINS ACTIVE. A FRONT OVER THE
NORTH PACIFIC WILL LIFT NORTHWARD TOWARD THE ALEUTIAN CHAIN 
THROUGH TONIGHT THEN BEGIN TO WEAKEN OVER THE CHAIN ON SAT.

$$

PKZ411-250245-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
323 AM AKDT FRI MAR 24 2017

...GALE WARNING THROUGH SATURDAY...

.TODAY...E WIND 20 TO 35 KT. SEAS 10 TO 18 FT. RAIN.
.TONIGHT...E WIND 25 TO 35 KT. SEAS 12 TO 19 FT. RAIN.
.SAT...E WIND 25 TO 35 KT. SEAS 15 TO 18 FT. RAIN AND SNOW.
.SAT NIGHT...E WIND 30 KT. SEAS 14 TO 17 FT.
.SUN THROUGH TUE...E WIND 20 TO 30 KT. SEAS 9 TO 14 FT.

$$

PKZ412-250245-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
323 AM AKDT FRI MAR 24 2017

.TODAY...E WIND 20 TO 30 KT. SEAS 6 TO 11 FT.
.TONIGHT...E WIND 30 KT. SEAS 9 TO 15 FT. FREEZING SPRAY.
.SAT...E WIND 30 KT. SEAS 10 TO 15 FT. FREEZING SPRAY.
.SAT NIGHT...E WIND 30 KT. SEAS 9 TO 15 FT.
.SUN THROUGH TUE...NE WIND 20 TO 30 KT. SEAS 8 TO 13 FT.

$$

PKZ413-250245-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
323 AM AKDT FRI MAR 24 2017

...GALE WARNING THROUGH SATURDAY...

.TODAY...E WIND 30 TO 40 KT. SEAS 9 TO 17 FT. RAIN.
.TONIGHT...E WIND 35 KT. SEAS 13 TO 18 FT.
.SAT...E WIND 35 KT. SEAS 13 TO 18 FT.
.SAT NIGHT...E WIND 35 KT. SEAS 13 TO 17 FT.
.SUN THROUGH TUE...NE WIND 25 TO 35 KT. SEAS 9 TO 14 FT.

$$

PKZ414-250245-
BERING SEA OFFSHORE EAST OF 171W-
323 AM AKDT FRI MAR 24 2017

.TODAY...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 7 FT.
.TONIGHT...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
FREEZING SPRAY.
.SAT...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
.SAT NIGHT...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
.SUN THROUGH TUE...NE WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3
TO 8 FT.

$$

265 
FZAK62 PAFC 242335
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
335 PM AKDT FRI MAR 24 2017

OFFSHORE WATERS FORECAST FOR THE BERING SEA

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.

PKZ499-251445-
335 PM AKDT FRI MAR 24 2017
.SYNOPSIS FOR CENTRAL BERING SEA...
BOGOSLOF VOLCANO AT 54N 168W REMAINS ACTIVE. A FRONT WILL STALL
SOUTH OF THE ALEUTIAN CHAIN FRI NIGHT THEN THEN GRADUALLY WEAKEN 
THROUGH SUN. 

$$

PKZ411-251445-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
335 PM AKDT FRI MAR 24 2017

...GALE WARNING THROUGH SATURDAY NIGHT...

.TONIGHT...E WIND 25 TO 35 KT. SEAS 12 TO 18 FT. RAIN.
.SAT...E WIND 25 TO 35 KT. SEAS 15 TO 18 FT. SNOW AND RAIN.
.SAT NIGHT...E WIND 25 TO 35 KT. SEAS 14 TO 17 FT. RAIN AND SNOW.
.SUN...E WIND 30 KT. SEAS 13 TO 16 FT.
.SUN NIGHT...E WIND 20 TO 30 KT. SEAS 11 TO 14 FT.
.MON THROUGH WED...E WIND 25 KT. SEAS 7 TO 12 FT.

$$

PKZ412-251445-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
335 PM AKDT FRI MAR 24 2017

.TONIGHT...E WIND 30 KT. SEAS 9 TO 15 FT. FREEZING SPRAY.
.SAT...E WIND 20 TO 30 KT. SEAS 9 TO 15 FT. FREEZING SPRAY.
.SAT NIGHT...E WIND 20 TO 30 KT. SEAS 9 TO 14 FT. FREEZING SPRAY.
.SUN...E WIND 30 KT. SEAS 9 TO 13 FT.
.SUN NIGHT...E WIND 25 KT. SEAS 7 TO 12 FT.
.MON THROUGH WED...NE WIND 25 KT. SEAS 6 TO 10 FT.

$$

PKZ413-251445-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
335 PM AKDT FRI MAR 24 2017

...GALE WARNING THROUGH SATURDAY NIGHT...

.TONIGHT...E WIND 35 KT. SEAS 13 TO 18 FT. RAIN.
.SAT...E WIND 35 KT. SEAS 13 TO 18 FT. RAIN.
.SAT NIGHT...E WIND 35 KT. SEAS 12 TO 17 FT. RAIN.
.SUN...E WIND 30 KT. SEAS 11 TO 15 FT.
.SUN NIGHT...E WIND 30 KT. SEAS 10 TO 13 FT.
.MON THROUGH WED...NE WIND 20 TO 30 KT. SEAS 7 TO 11 FT.

$$

PKZ414-251445-
BERING SEA OFFSHORE EAST OF 171W-
335 PM AKDT FRI MAR 24 2017

.TONIGHT...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
FREEZING SPRAY.
.SAT...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
FREEZING SPRAY.
.SAT NIGHT...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8
FT. FREEZING SPRAY.
.SUN...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
.SUN NIGHT...NE WIND 15 TO 25 KT. SEAS IN ICE FREE WATERS 3 TO 8
FT.
.MON THROUGH WED...NE WIND 15 TO 25 KT. SEAS IN ICE FREE WATERS 3
TO 7 FT.

$$

108 
FZAK62 PAFC 251123
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
323 AM AKDT SAT MAR 25 2017

OFFSHORE WATERS FORECAST FOR THE BERING SEA

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.

PKZ499-260115-
323 AM AKDT SAT MAR 25 2017
.SYNOPSIS FOR CENTRAL BERING SEA...
BOGOSLOF VOLCANO AT 54N 168W REMAINS ACTIVE. A FRONT HAS STALLED
OVER THE ALEUTIAN CHAIN AND WILL GRADUALLY WEAKEN THROUGH SUN. 

$$

PKZ411-260115-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
323 AM AKDT SAT MAR 25 2017

...GALE WARNING THROUGH TONIGHT...

.TODAY...E WIND 25 TO 35 KT. SEAS 14 TO 18 FT. SNOW AND RAIN.
.TONIGHT...E WIND 25 TO 35 KT. SEAS 14 TO 17 FT. RAIN.
.SUN...E WIND 30 KT. SEAS 12 TO 17 FT. RAIN.
.SUN NIGHT...E WIND 20 TO 30 KT. SEAS 10 TO 14 FT.
.MON THROUGH WED...NE WIND 15 TO 25 KT. SEAS 7 TO 11 FT.

$$

PKZ412-260115-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
323 AM AKDT SAT MAR 25 2017

.TODAY...E WIND 20 TO 30 KT. SEAS 9 TO 14 FT. FREEZING SPRAY AND
PATCHY FOG.
.TONIGHT...E WIND 20 TO 30 KT. SEAS 9 TO 14 FT. FREEZING SPRAY.
.SUN...E WIND 30 KT. SEAS 8 TO 12 FT. FREEZING SPRAY AND PATCHY
FREEZING FOG.
.SUN NIGHT...E WIND 25 KT. SEAS 7 TO 11 FT.
.MON THROUGH WED...NE WIND 15 TO 25 KT. SEAS 5 TO 9 FT.

$$

PKZ413-260115-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
323 AM AKDT SAT MAR 25 2017

...GALE WARNING THROUGH TONIGHT...

.TODAY...E WIND 35 KT. SEAS 12 TO 17 FT. PATCHY FOG. RAIN SHOWERS.
.TONIGHT...E WIND 35 KT. SEAS 11 TO 17 FT. PATCHY FOG.
.SUN...E WIND 30 KT. SEAS 11 TO 15 FT. PATCHY FOG.
.SUN NIGHT...E WIND 25 KT. SEAS 9 TO 12 FT.
.MON THROUGH WED...NE WIND 15 TO 25 KT. SEAS 7 TO 10 FT.

$$

PKZ414-260115-
BERING SEA OFFSHORE EAST OF 171W-
323 AM AKDT SAT MAR 25 2017

.TODAY...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
PATCHY FOG.
.TONIGHT...E WIND 15 TO 25 KT. SEAS IN ICE FREE WATERS 3 TO 7 FT.
FREEZING SPRAY AND PATCHY FREEZING FOG.
.SUN...E WIND 15 TO 25 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
FREEZING SPRAY AND PATCHY FREEZING FOG.
.SUN NIGHT...NE WIND 15 TO 25 KT. SEAS IN ICE FREE WATERS 3 TO 7 FT.
.MON THROUGH WED...NE WIND 15 TO 25 KT. SEAS IN ICE FREE WATERS 3
TO 7 FT.

$$

322 
FZAK62 PAFC 252343
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
343 PM AKDT SAT MAR 25 2017

OFFSHORE WATERS FORECAST FOR THE BERING SEA

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.

PKZ499-261345-
343 PM AKDT SAT MAR 25 2017
.SYNOPSIS FOR CENTRAL BERING SEA...
BOGOSLOF VOLCANO AT 54N 168W REMAINS ACTIVE. A 973 MB LOW AT 49N
172E EXTENDS A FRONT SOUTH OF THE ALEUTIANS. A 982 MB LOW FORMS
NEAR 51N 180 SUN MORNING AND MOVES WEST ALONG THE FRONT. A 980 MB
NORTH PACIFIC LOW MOVES TO 51N 164W MON MORNING THEN RETREATS TO
THE NORTH PACIFIC BY MON AFTERNOON.

$$

PKZ411-261345-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
343 PM AKDT SAT MAR 25 2017

...GALE WARNING TONIGHT...

.TONIGHT...E WIND 25 TO 35 KT. SEAS 14 TO 17 FT. RAIN.
.SUN...E WIND 30 KT. SEAS 12 TO 16 FT. RAIN.
.SUN NIGHT...E WIND 30 KT. SEAS 10 TO 15 FT.
.MON...E WIND 15 TO 25 KT. SEAS 8 TO 11 FT.
.MON NIGHT...E WIND 20 KT. SEAS 7 FT.
.TUE THROUGH THU...NE WIND 15 TO 25 KT. SEAS 5 TO 10 FT.

$$

PKZ412-261345-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
343 PM AKDT SAT MAR 25 2017

.TONIGHT...E WIND 20 TO 30 KT. SEAS 9 TO 14 FT. FREEZING SPRAY.
.SUN...E WIND 30 KT. SEAS 8 TO 13 FT. FREEZING SPRAY.
.SUN NIGHT...NE WIND 25 KT. SEAS 9 FT. FREEZING SPRAY.
.MON...NE WIND 20 KT. SEAS 7 FT.
.MON NIGHT...NE WIND 20 KT. SEAS 5 TO 8 FT.
.TUE THROUGH THU...NE WIND 10 TO 25 KT. SEAS 4 TO 9 FT.

$$

PKZ413-261345-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
343 PM AKDT SAT MAR 25 2017

...GALE WARNING TONIGHT...

.TONIGHT...E WIND 35 KT. SEAS 12 TO 16 FT.
.SUN...E WIND 30 KT. SEAS 11 TO 16 FT.
.SUN NIGHT...E WIND 25 KT. SEAS 11 FT.
.MON...NE WIND 15 TO 25 KT. SEAS 9 FT.
.MON NIGHT...NE WIND 20 KT. SEAS 8 FT.
.TUE THROUGH THU...NE WIND 10 TO 25 KT. SEAS 7 TO 11 FT.

$$

PKZ414-261345-
BERING SEA OFFSHORE EAST OF 171W-
343 PM AKDT SAT MAR 25 2017

...HEAVY FREEZING SPRAY TONIGHT AND SUNDAY NIGHT...

.TONIGHT...E WIND 15 TO 25 KT. SEAS IN ICE FREE WATERS 3 TO 7 FT.
HEAVY FREEZING SPRAY NEAR THE ICE EDGE.
.SUN...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
FREEZING SPRAY.
.SUN NIGHT...NE WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8
FT. HEAVY FREEZING SPRAY NEAR THE ICE EDGE.
.MON...NE WIND 15 TO 25 KT. SEAS IN ICE FREE WATERS 3 TO 7 FT.
.MON NIGHT...NE WIND 20 KT. SEAS IN ICE FREE WATERS 3 TO 7 FT.
.TUE THROUGH THU...NE WIND 10 TO 25 KT. SEAS IN ICE FREE WATERS 3
TO 8 FT.

$$

539 
FZAK62 PAFC 261125
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
325 AM AKDT SUN MAR 26 2017

OFFSHORE WATERS FORECAST FOR THE BERING SEA

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.

PKZ499-270145-
325 AM AKDT SUN MAR 26 2017
.SYNOPSIS FOR CENTRAL BERING SEA...
BOGOSLOF VOLCANO AT 54N 168W REMAINS ACTIVE. A STALLED FRONT WILL
REMAIN OVER THE WESTERN AND CENTRAL ALEUTIANS INTO MONDAY THEN
DISSIPATES.

$$

PKZ411-270145-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
325 AM AKDT SUN MAR 26 2017

.TODAY...E WIND 30 KT. SEAS 12 TO 16 FT. RAIN.
.TONIGHT...E WIND 25 KT. SEAS 12 FT.
.MON...E WIND 20 KT. SEAS 10 FT.
.MON NIGHT...E WIND 20 KT. SEAS 8 FT.
.TUE THROUGH THU...NE WIND 15 TO 25 KT. SEAS 5 TO 10 FT.

$$

PKZ412-270145-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
325 AM AKDT SUN MAR 26 2017

.TODAY...E WIND 20 TO 30 KT. SEAS 8 TO 12 FT. FREEZING SPRAY.
.TONIGHT...E WIND 25 KT. SEAS 7 TO 11 FT. FREEZING SPRAY.
.MON...NE WIND 25 KT. SEAS 6 TO 9 FT. FREEZING SPRAY.
.MON NIGHT...NE WIND 20 KT. SEAS 5 TO 8 FT.
.TUE THROUGH THU...NE WIND 10 TO 25 KT. SEAS 4 TO 9 FT.

$$

PKZ413-270145-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
325 AM AKDT SUN MAR 26 2017

.TODAY...E WIND 30 KT. SEAS 11 TO 15 FT.
.TONIGHT...E WIND 30 KT. SEAS 11 FT.
.MON...NE WIND 25 KT. SEAS 10 FT.
.MON NIGHT...NE WIND 20 KT. SEAS 8 FT.
.TUE THROUGH THU...NE WIND 10 TO 25 KT. SEAS 6 TO 11 FT.

$$

PKZ414-270145-
BERING SEA OFFSHORE EAST OF 171W-
325 AM AKDT SUN MAR 26 2017

.TODAY...E WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
.TONIGHT...NE WIND 15 TO 30 KT. SEAS IN ICE FREE WATERS 3 TO 8 FT.
FREEZING SPRAY.
.MON...NE WIND 15 TO 25 KT. SEAS IN ICE FREE WATERS 3 TO 7 FT.
FREEZING SPRAY.
.MON NIGHT...NE WIND 20 KT. SEAS IN ICE FREE WATERS 3 TO 7 FT.
.TUE THROUGH THU...N WIND 10 TO 25 KT. SEAS IN ICE FREE WATERS 3
TO 8 FT.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
419 PM AKDT Wed Mar 22 2017

.ANALYSIS AND UPPER LEVELS...
An upper trough which has been stationary over Southcentral has
developed into a closed low and is now beginning to sink southward
as a short-wave over northern Alaska drops into the back side of
the long-wave trough. With continued low level offshore flow and
the lack of any organized system over the Gulf, the only impact of
the upper low is a few clouds and isolated snow showers over the
mountains of eastern Prince William Sound on up into the Copper
River Basin. Otherwise, dry and cool conditions with locally gusty
winds (primarily along the coast) continue across Southcentral and
all the way west to the eastern half of the Bering Sea under the
influence of the blocking high.

Conditions out west along the Aleutians are quite benign as well
with a weak low passing to the west across the far western Bering
Sea. Meanwhile, a very large deep low over the northwest Pacific
is slowly tracking toward the Aleutians. This will be the first
major storm system to affect the region in quite some time and
will be the lead-in to what will become a significant pattern
change for all of Alaska.

&&

.MODEL DISCUSSION...
Models remain in good agreement over the next couple days and
forecast confidence is high.

&&

.AVIATION...
PANC...VFR conditions and light winds will persist.

&&

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

A weakening low pressure center in the Gulf will send more clouds
and isolated snow showers across eastern Prince William Sound
tonight into Thu. Otherwise sunny and slowly warming days with
clear and cold nights will continue through Fri. Locally gusty
north winds through channeled terrain are also expected during the
period.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2)...
Northerly flow and generally sunny skies will continue over the
region into late in the work week as a ridge of high pressure
remains over the Eastern Bering. One exception to this will be
over the Kuskokwim Valley which will see a slight increase in
cloudcover and a chance of flurries as a shortwave descending
from the western interior clips the area on Thursday. This feature
is both drier and weaker than initially expected, so any flurries
that do develop should be brief. Northerly flow will then increase
on Saturday as a weakening gale force front spreads into the
Bering, but with otherwise sunny and dry weather.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2)...
Most of the Bering Sea will see one more day of benign weather on
Thursday in advance of the next frontal system that will move into
the Western Bering beginning late Thursday. This system will
spread gale force winds and rain throughout much of the Bering and
Aleutians to the west of the Pribilof Islands for Friday and
Saturday.

&&

.LONG TERM FORECAST (Days 3 through 7)...

Northwest upper level flow and ridging over the Bering will remain
dominant as the extended period forecast begins Friday evening.
At the same time a sprawling low over the North Pacific extending
into the southwest Bering Sea will be slowly moving east. This
means the sensible weather pattern of mostly dry and offshore flow
over Southern Alaska will still be dominant before larger changes
begin to develop Sunday and into next week. After weeks of
dominant ridging over the Bering Sea, this feature will begin to
weaken and retrograde northwest, allowing for a pattern change as
the arctic trough over Southern Alaska merges with a series of
weak North Pacific lows. Right now, there is uncertainty of
exactly where the arctic trough stalls, but it is most likely that
the trough stalls near the Alaska Range with most of the
precipitation (rain and snow along the coast) remaining east of
the Alaska Range. By midweek and beyond, uncertainty grows with
the details, but it seems quite likely, based on the shifting
blocking high, that storminess will be on the increase as the NPAC
jet strengthens and amplifies.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Heavy Freezing Spray 121 126 127 129.
Gale 174 175 176 177 178

&&

SYNOPSIS AND MODEL DISCUSSION...SEB
SOUTHCENTRAL ALASKA...DS
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...DEK
LONG TERM...JA