Gale Warning 6, NWS Anchorage, AK

572 
FZAK62 PAFC 121301
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
401 AM AKST THU JAN 12 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.

PKZ499-130215-
401 AM AKST THU JAN 12 2017
.SYNOPSIS FOR CENTRAL BERING SEA...

BOGOSLOF VOLCANO AT 54N 168W REMAINS ACTIVE. HIGH PRESSURE WILL
REMAIN OVER THE WESTERN BERING SEA THROUGH FRI NIGHT. A 976 MB LOW
NEAR 51N 158W FRI MORNING WILL MOVE INTO THE GULF OF ALASKA AT 973
MB FRI AFTERNOON. AN ASSOCIATED FRONT WILL REMAIN SOUTH OF THE
ALEUTIANS AND ALASKA PENINSULA THROUGH FRI AFTERNOON.

$$

PKZ411-130215-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
401 AM AKST THU JAN 12 2017

...GALE WARNING TONIGHT AND FRIDAY...

.TODAY...NE WIND 30 KT. SEAS 10 FT.
.TONIGHT...NE WIND 25 TO 35 KT. SEAS 13 FT.
.FRI...NE WIND 25 TO 35 KT. SEAS 13 TO 16 FT.
.FRI NIGHT...NE WIND 20 TO 30 KT. SEAS 12 TO 15 FT.
.SAT THROUGH MON...NE WIND 15 TO 25 KT. SEAS 8 TO 13 FT.

$$

PKZ412-130215-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
401 AM AKST THU JAN 12 2017

...GALE WARNING TONIGHT...

.TODAY...NE WIND 20 TO 30 KT. SEAS 6 TO 10 FT.
.TONIGHT...NE WIND 25 TO 35 KT. SEAS 8 TO 13 FT. SNOW SHOWERS.
.FRI...N WIND 30 KT. SEAS 11 TO 14 FT. SNOW SHOWERS.
.FRI NIGHT...N WIND 20 TO 30 KT. SEAS 12 FT.
.SAT THROUGH MON...NE WIND 15 TO 25 KT. SEAS 7 TO 12 FT.

$$

PKZ413-130215-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
401 AM AKST THU JAN 12 2017

...GALE WARNING TONIGHT AND FRIDAY...

.TODAY...NE WIND 30 KT. SEAS 11 FT.
.TONIGHT...NE WIND 35 KT. SEAS 13 TO 16 FT.
.FRI...NE WIND 20 TO 35 KT. SEAS 15 FT. SNOW SHOWERS.
.FRI NIGHT...NE WIND 15 TO 25 KT. SEAS 11 TO 15 FT.
.SAT THROUGH MON...NE WIND 10 TO 25 KT. SEAS 7 TO 12 FT.

$$

PKZ414-130215-
BERING SEA OFFSHORE EAST OF 171W-
401 AM AKST THU JAN 12 2017

...GALE WARNING TONIGHT AND FRIDAY...

.TODAY...NE WIND 20 TO 30 KT. SEAS 6 TO 11 FT.
.TONIGHT...NE WIND 35 KT. SEAS 9 TO 14 FT.
.FRI...N WIND 35 KT. SEAS 11 TO 16 FT.
.FRI NIGHT...N WIND 15 TO 30 KT. SEAS 9 TO 13 FT.
.SAT THROUGH MON...NE WIND 10 TO 20 KT. SEAS 5 TO 10 FT.

$$

062 
FZAK62 PAFC 130000
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
300 PM AKST THU JAN 12 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.

PKZ499-131445-
300 PM AKST THU JAN 12 2017
.SYNOPSIS FOR CENTRAL BERING SEA...

BOGOSLOF VOLCANO AT 54N 168W REMAINS ACTIVE. SIBERIAN HIGH
PRESSURE STRETCHES OVER THE BERING SEA THROUGH SAT AFTERNOON. A
975 MB AT 53N 157W FRI MORNING MOVES THROUGH THE WESTERN GULF OF
ALASKA THROUGH FRI NIGHT. THE ASSOCIATED FRONT REMAINS SOUTH OF
THE ALEUTIAN ISLANDS THROUGH SAT AFTERNOON.

$$

PKZ411-131445-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
300 PM AKST THU JAN 12 2017

...GALE WARNING THROUGH FRIDAY...

.TONIGHT...NE WIND 35 KT. SEAS 14 FT.
.FRI...NE WIND 35 KT. SEAS 14 TO 17 FT.
.FRI NIGHT...NE WIND 30 KT. SEAS 14 FT.
.SAT...NE WIND 25 KT. SEAS 10 TO 13 FT.
.SAT NIGHT...NE WIND 20 KT. SEAS 9 FT.
.SUN THROUGH TUE...N WIND 20 KT. SEAS 7 TO 10 FT.

$$

PKZ412-131445-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
300 PM AKST THU JAN 12 2017

...GALE WARNING TONIGHT...

.TONIGHT...NE WIND 25 TO 35 KT. SEAS 9 TO 15 FT. SNOW SHOWERS.
.FRI...N WIND 30 KT. SEAS 14 FT. WIDESPREAD SNOW SHOWERS.
.FRI NIGHT...N WIND 20 TO 30 KT. SEAS 13 FT. WIDESPREAD SNOW
SHOWERS.
.SAT...N WIND 15 TO 25 KT. SEAS 9 TO 13 FT.
.SAT NIGHT...N WIND 10 TO 20 KT. SEAS 7 TO 10 FT.
.SUN THROUGH TUE...N WIND 10 TO 20 KT. SEAS 5 TO 9 FT.

$$

PKZ413-131445-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
300 PM AKST THU JAN 12 2017

...GALE WARNING THROUGH FRIDAY...

.TONIGHT...NE WIND 35 KT. SEAS 14 TO 17 FT.
.FRI...NE WIND 35 KT. SEAS 16 FT. SNOW SHOWERS.
.FRI NIGHT...N WIND 15 TO 25 KT. SEAS 12 TO 15 FT. SNOW SHOWERS.
.SAT...N WIND 10 TO 25 KT. SEAS 9 TO 12 FT.
.SAT NIGHT...NE WIND 10 TO 20 KT. SEAS 7 TO 10 FT.
.SUN THROUGH TUE...N WIND 20 KT. SEAS 5 TO 8 FT.

$$

PKZ414-131445-
BERING SEA OFFSHORE EAST OF 171W-
300 PM AKST THU JAN 12 2017

...GALE WARNING THROUGH FRIDAY...

.TONIGHT...NE WIND 35 KT. SEAS 9 TO 16 FT.
.FRI...N WIND 35 KT. SEAS 12 TO 16 FT. SNOW SHOWERS.
.FRI NIGHT...N WIND 30 KT DIMINISHING TO 15 TO 25 KT AFTER
MIDNIGHT. SEAS 10 TO 14 FT. SNOW SHOWERS.
.SAT...N WIND 10 TO 20 KT. SEAS 7 TO 10 FT.
.SAT NIGHT...N WIND 15 KT. SEAS 5 TO 8 FT.
.SUN THROUGH TUE...N WIND 10 TO 25 KT. SEAS 5 TO 9 FT.

$$

697 
FZAK62 PAFC 131240
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
340 AM AKST FRI JAN 13 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.

PKZ499-140230-
340 AM AKST FRI JAN 13 2017
.SYNOPSIS FOR CENTRAL BERING SEA...

BOGOSLOF VOLCANO AT 54N 168W REMAINS ACTIVE. SIBERIAN HIGH
PRESSURE STRETCHES OVER THE BERING SEA THROUGH SAT AFTERNOON.

$$

PKZ411-140230-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
340 AM AKST FRI JAN 13 2017

...GALE WARNING TODAY...

.TODAY...NE WIND 35 KT. SEAS 14 TO 17 FT. FREEZING SPRAY N OF 56N.
.TONIGHT...NE WIND 25 KT. SEAS 14 FT. FREEZING SPRAY.
.SAT...NE WIND 25 KT. SEAS 11 FT. FREEZING SPRAY.
.SAT NIGHT...NE WIND 20 KT. SEAS 9 FT.
.SUN THROUGH TUE...N WIND 15 TO 25 KT. SEAS 8 FT.

$$

PKZ412-140230-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
340 AM AKST FRI JAN 13 2017

.TODAY...N WIND 30 KT. SEAS 12 TO 15 FT. WIDESPREAD SNOW SHOWERS.
FREEZING SPRAY.
.TONIGHT...N WIND 20 TO 30 KT. SEAS 12 FT. WIDESPREAD SNOW
SHOWERS. FREEZING SPRAY.
.SAT...N WIND 15 TO 25 KT. SEAS 11 FT. SNOW SHOWERS. FREEZING
SPRAY.
.SAT NIGHT...N WIND 10 TO 20 KT. SEAS 7 TO 10 FT.
.SUN THROUGH TUE...N WIND 10 TO 20 KT. SEAS 5 TO 8 FT.

$$

PKZ413-140230-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
340 AM AKST FRI JAN 13 2017

...GALE WARNING TODAY...

.TODAY...NE WIND 35 KT. SEAS 16 FT. FREEZING SPRAY IN THE
AFTERNOON.
.TONIGHT...N WIND 25 KT. SEAS 11 TO 15 FT. SNOW SHOWERS. FREEZING
SPRAY.
.SAT...N WIND 20 KT. SEAS 10 FT. FREEZING SPRAY.
.SAT NIGHT...NE WIND 10 TO 20 KT. SEAS 8 FT.
.SUN THROUGH MON...NE WIND 10 TO 20 KT. SEAS 7 FT.
.TUE...N WIND 15 KT. SEAS 5 TO 8 FT.

$$

PKZ414-140230-
BERING SEA OFFSHORE EAST OF 171W-
340 AM AKST FRI JAN 13 2017

...GALE WARNING TODAY...
...HEAVY FREEZING SPRAY WARNING THROUGH TONIGHT...

.TODAY...N WIND 25 TO 35 KT. SEAS 11 TO 17 FT. SNOW SHOWERS. HEAVY
FREEZING SPRAY N OF 56N AND E OF 168W.
.TONIGHT...N WIND 30 KT DIMINISHING TO 15 TO 25 KT AFTER MIDNIGHT.
SEAS 11 FT. SNOW SHOWERS. HEAVY FREEZING SPRAY N OF 56N.
.SAT...N WIND 20 KT. SEAS 6 TO 10 FT. FREEZING SPRAY.
.SAT NIGHT...N WIND 10 TO 20 KT. SEAS 7 FT.
.SUN THROUGH TUE...N WIND 10 TO 25 KT. SEAS 5 TO 8 FT.

$$

518 
FZAK62 PAFC 140011
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
311 PM AKST FRI JAN 13 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.

PKZ499-141530-
311 PM AKST FRI JAN 13 2017
.SYNOPSIS FOR CENTRAL BERING SEA...
BOGOSLOF VOLCANO AT 54N 168W REMAINS ACTIVE. SIBERIAN HIGH
PRESSURE CONTINUES SPREADING OVER THE BERING SEA AND RIDGES
ACROSS THE CENTRAL ALEUTIANS THROUGH SUN AFTERNOON. A FRONT
REMAINS SOUTH OF THE ALEUTIANS THROUGH SUN AFTERNOON.

$$

PKZ411-141530-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
311 PM AKST FRI JAN 13 2017

.TONIGHT...NE WIND 25 KT. SEAS 13 TO 17 FT. FREEZING SPRAY.
.SAT...NE WIND 25 KT. SEAS 10 TO 13 FT. FREEZING SPRAY.
.SAT NIGHT...NE WIND 20 KT. SEAS 9 TO 11 FT. FREEZING SPRAY.
.SUN...NE WIND 15 KT. SEAS 6 TO 9 FT.
.SUN NIGHT...NE WIND 20 KT. SEAS 7 FT.
.MON THROUGH WED...N WIND 15 TO 25 KT. SEAS 8 FT.

$$

PKZ412-141530-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
311 PM AKST FRI JAN 13 2017

...HEAVY FREEZING SPRAY WARNING THROUGH SATURDAY...

.TONIGHT...N WIND 20 TO 30 KT. SEAS 11 TO 14 FT. SNOW SHOWERS.
HEAVY FREEZING SPRAY N OF 58N.
.SAT...N WIND 15 TO 25 KT. SEAS 9 TO 12 FT. SNOW SHOWERS. HEAVY
FREEZING SPRAY N OF 58N.
.SAT NIGHT...N WIND 20 KT. SEAS 9 FT. SNOW SHOWERS. FREEZING
SPRAY.
.SUN...N WIND 10 TO 20 KT. SEAS 7 FT.
.SUN NIGHT...NE WIND 10 TO 20 KT. SEAS 7 FT.
.MON THROUGH WED...N WIND 10 TO 20 KT. SEAS 5 TO 8 FT.

$$

PKZ413-141530-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
311 PM AKST FRI JAN 13 2017

.TONIGHT...N WIND 15 TO 25 KT. SEAS 10 TO 15 FT. SNOW SHOWERS.
FREEZING SPRAY.
.SAT...N WIND 10 TO 20 KT. SEAS 9 TO 12 FT. FREEZING SPRAY.
.SAT NIGHT...NE WIND 10 TO 20 KT. SEAS 9 FT. FREEZING SPRAY.
.SUN...NE WIND 15 KT. SEAS 7 FT.
.SUN NIGHT...NE WIND 15 KT. SEAS 6 FT.
.MON...NE WIND 10 TO 20 KT. SEAS 6 FT.
.TUE THROUGH WED...NW WIND 20 KT. SEAS 5 TO 8 FT.

$$

PKZ414-141530-
BERING SEA OFFSHORE EAST OF 171W-
311 PM AKST FRI JAN 13 2017

...HEAVY FREEZING SPRAY WARNING THROUGH SATURDAY...

.TONIGHT...N WIND 15 TO 30 KT. SEAS 10 TO 13 FT. SNOW SHOWERS.
HEAVY FREEZING SPRAY.
.SAT...NW WIND 10 TO 20 KT. SEAS 6 TO 10 FT. HEAVY FREEZING SPRAY
N OF 57N.
.SAT NIGHT...N WIND 10 TO 20 KT. SEAS 6 TO 9 FT. FREEZING SPRAY.
.SUN...N WIND 10 TO 20 KT. SEAS 6 FT.
.SUN NIGHT...N WIND 10 TO 25 KT. SEAS 5 TO 8 FT.
.MON THROUGH TUE...N WIND 10 TO 25 KT. SEAS 5 TO 8 FT.
.WED...NW WIND 20 KT. SEAS 6 FT.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
511 AM AKST Wed Jan 11 2017

.ANALYSIS AND UPPER LEVELS...
A large blocking ridge continues over mainland Alaska. Generally
fair skies were observed over much of the mainland. However, some
areas of low stratus and fog persist across parts of the Cook
Inlet region, including the Anchorage Bowl. Areas of low stratus
and fog continue to be observed along the southwest Alaska Coast
this morning as well. Cloudy conditions prevail across much of
the Bering Sea and Western ALeutians. With the exception of weak
outflow conditions across the eastern Kenai Pen and North Gulf
Coast, light winds continue to be observed across much of the
mainland. A weak frontal boundary along the central and western
Aleutians continues to bring gusty easterly winds to those areas.

&&

.MODEL DISCUSSION...
Models overall continue to be in good synoptic agreement. Some
minor differences arise in snow potential for the North Gulf Coast
Thursday afternoon, and more so for the Anchorage area in the
Friday to Saturday time frame. Models have started to converge on
a solution showing accumulating snowfall over the Anchorage area
and much of Southcentral within the Friday to Saturday time
period. However, timing and amounts vary depending on which model
you look at. Therefore, forecast confidence is high with regards
to seeing some accumulating snowfall by the end of the week and
into the weekend for Southcentral. Forecast confidence is still
low though with regards to amounts and timing of the snowfall due
to varying model solutions.

&&

.AVIATION...
PANC...Some breaks in the fog are expected this morning. However,
IFR/LIFR ceilings and visibilities will be the general rule
through this afternoon.

&&

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

Southcentral Alaska will remain under high pressure with mostly
clear skies and areas of fog near Cook Inlet the near two days.
In short, no real changes in the weather until Thursday night
and Friday when there will be a pattern change that will bring in
a chance for snow around Southcentral.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2)...
An advancing upper level trough will begin to usher in increasing
northerly winds today as the closed high which had been entrenched
over the region departs into the Gulf of Alaska. This will help to
scour out any lingering fog or low stratus across Bristol Bay and
the Kuskokwim Delta by this evening as the stout low level
temperature inversions begin to erode with the arrival of colder
air aloft. After a slight warm up today, temperatures will plummet
once again by Thursday as 850 mb temperatures drop by as much as
15-20 degrees C from today. This will yield afternoon highs
struggling to reach double digits on Thursday, with overnight lows
falling well below zero area-wide on Thursday night as skies
remain mostly clear.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2)...
Easterly winds will gradually shift to the northeast and
strengthen to Small Craft Advisory level across much of the Bering
through Thursday night as the pressure gradient tightens in
response to the digging mainland trough. This will also generate
more widespread shower activity as colder air filters into the
region.

&&

.LONG TERM FORECAST (Days 3 through 7)...
Since Monday, the models have made a relatively small but very
important change. The arctic trough that will dig through the
Southwest Mainland on Friday has trended further west, with
improving agreement that this will bring the surface trough
towards the north gulf coast. As a result the chance of
precipitation for the North Gulf from Whittier-Cordova was
increased significantly on Friday night, mostly likely falling in
the form of snow. Over Southcentral, confidence is much lower in
the snow forecast, but chances are increasing in at least a brief
period of snow. This is due to significant model spread in the
amount of snowfall reaching into Cook Inlet. The GFS has been by
far the most aggressive in bringing snow into Cook Inlet. On the
other side of the spectrum, EC and NAM are much further to the
east in bringing only a brief period of light snow but are
beginning to trend slowly west.

Once the chance for snow moves out of the area late Saturday-
Sunday, there is good confidence that this arctic trough will
bring in a deep layer of extremely cold air throughout most of
the area. Since this is coming from a trough there remains some
uncertainty as to how much cloud cover will be associated with it.
If enough clearing occurs over interior areas to create strong
inversions this system has the potential to bring some of the
coldest temperatures in recent years, especially to the lower
elevations of the Southwest Mainland. Once the cold air sets up
there is good agreement that it will continue through the middle
of next week.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Heavy Freezing Spray 180 181.

&&