Gale Warning 250, NWS Anchorage, AK

324 
FZAK61 PAFC 020001
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
401 PM AKDT SAT APR 1 2017

OFFSHORE WATERS FORECAST FOR THE GULF OF ALASKA WEST OF 144W

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.

PKZ399-021315-
401 PM AKDT SAT APR 1 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A 991 MB LOW NEAR 59N 150W WILL MOVE INTO PRINCE WILLIAM SOUND
LATE SUN MORNING BEFORE MOVING INLAND AND DISSIPATING SUN
AFTERNOON. THE ASSOCIATED FRONT WILL MOVE ACROSS THE GULF OF
ALASKA THROUGH MON MORNING. A 975 MB NORTH PACIFIC LOW MOVES TO 
53N 150W LATE MON.

$$

PKZ351-021315-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W-
401 PM AKDT SAT APR 1 2017

...GALE WARNING TONIGHT...

.TONIGHT...SW WIND 25 TO 35 KT. SEAS 16 TO 21 FT. SNOW SHOWERS.
.SUN...SW WIND 15 TO 30 KT BECOMING S 10 TO 20 KT IN THE AFTERNOON. 
SEAS 9 TO 17 FT.
.SUN NIGHT...E WIND 15 TO 25 KT. SEAS 6 TO 9 FT.
.MON...E WIND 30 TO 45 KT. SEAS 10 TO 18 FT.
.MON NIGHT...SE WIND 30 TO 45 KT. SEAS 15 TO 21 FT.
.TUE THROUGH WED...SE WIND 20 TO 35 KT. SEAS 12 TO 18 FT.
.THU...S WIND 15 TO 25 KT. SEAS 9 TO 14 FT.

$$

PKZ352-021315-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W-
401 PM AKDT SAT APR 1 2017

...GALE WARNING TONIGHT AND SUNDAY NIGHT...

.TONIGHT...SW WIND 25 TO 35 KT DIMINISHING TO 20 TO 30 KT AFTER
MIDNIGHT. SEAS 13 TO 21 FT.
.SUN...S WIND 10 TO 20 KT. SEAS 9 TO 14 FT.
.SUN NIGHT...SE WIND 10 TO 25 KT BECOMING E 20 TO 35 KT AFTER
MIDNIGHT. SEAS 6 TO 10 FT. RAIN.
.MON...E WIND 25 TO 40 KT. SEAS 11 TO 17 FT.
.MON NIGHT...SE WIND 20 TO 30 KT. SEAS 14 TO 20 FT.
.TUE THROUGH THU...SW WIND 15 TO 30 KT. SEAS 10 TO 18 FT.

$$

819 
FZAK61 PAFC 021120
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
320 AM AKDT SUN APR 2 2017

OFFSHORE WATERS FORECAST FOR THE GULF OF ALASKA WEST OF 144W

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.

PKZ399-030130-
320 AM AKDT SUN APR 2 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A 1003 MB LOW AT 59N 146W MOVES INLAND THROUGH PRINCE WILLIAM
SOUND AND DISSIPATES SUN AFTERNOON. THE ASSOCIATED FRONT MOVES
ACROSS THE GULF OF ALASKA THROUGH MON AFTERNOON. A 981 MB NORTH 
PACIFIC LOW MOVES TO 56N 150W AT 973 MB BY TUE MORNING. THE 
ASSOCIATED FRONT SPREADS OVER THE WESTERN GULF BY TUE MORNING.

$$

PKZ351-030130-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W-
320 AM AKDT SUN APR 2 2017

...GALE WARNING MONDAY...

.TODAY...SW WIND 15 TO 30 KT BECOMING S UP TO 20 KT IN THE
AFTERNOON. SEAS 9 TO 17 FT.
.TONIGHT...E WIND UP TO 20 KT INCREASING TO 15 TO 25 KT AFTER
MIDNIGHT. SEAS 7 TO 10 FT.
.MON...E WIND 25 TO 40 KT INCREASING TO 35 TO 45 KT IN THE
AFTERNOON. SEAS 7 TO 12 FT BUILDING TO 13 TO 18 FT IN THE
AFTERNOON. RAIN.
.MON NIGHT...E WIND 30 TO 45 KT. SEAS 16 TO 21 FT.
.TUE THROUGH WED...SE WIND 25 TO 40 KT. SEAS 16 TO 24 FT.
.THU...SE WIND 25 KT. SEAS 11 TO 15 FT.

$$

PKZ352-030130-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W-
320 AM AKDT SUN APR 2 2017

...GALE WARNING TONIGHT AND MONDAY...

.TODAY...S WIND 10 TO 25 KT. SEAS 10 TO 18 FT.
.TONIGHT...SE WIND 10 TO 25 KT BECOMING E 20 TO 35 KT AFTER
MIDNIGHT. SEAS 7 TO 11 FT.
.MON...SE WIND 30 TO 45 KT. SEAS 10 TO 17 FT. RAIN.
.MON NIGHT...E WIND 15 TO 30 KT. SEAS 14 TO 19 FT.
.TUE...E WIND 15 TO 30 KT. SEAS 10 TO 18 FT.
.WED THROUGH THU...S WIND 15 TO 30 KT. SEAS 11 TO 19 FT.

$$

356 
FZAK61 PAFC 022351
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
351 PM AKDT SUN APR 2 2017

OFFSHORE WATERS FORECAST FOR THE GULF OF ALASKA WEST OF 144W

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.

PKZ399-031330-
351 PM AKDT SUN APR 2 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A STRONG FRONT ENTERING THE SOUTHERN GULF MON MORNING WILL STALL 
ALONG THE NORTH GULF COAST MON EVENING THROUGH TUE. THE ASSOCIATED 
970 MB LOW NEAR 51N 152W MON MORNING WILL MOVE TO 54N 154W MON NIGHT 
AT 974 MB...THEN REMAIN NEARLY STATIONARY THROUGH TUE.

$$

PKZ351-031330-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W-
351 PM AKDT SUN APR 2 2017

...STORM WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...SE WIND 10 TO 20 KT BECOMING E 15 TO 30 KT AFTER
MIDNIGHT. SEAS 8 FT.
.MON...E WIND 25 TO 40 KT INCREASING TO 35 TO 50 KT IN THE
AFTERNOON. SEAS 8 TO 12 FT BUILDING TO 15 TO 20 FT IN THE AFTERNOON.
RAIN.
.MON NIGHT...SE WIND 35 TO 50 KT DIMINISHING TO 30 KT AFTER
MIDNIGHT. SEAS 15 TO 21 FT. RAIN.
.TUE...E WIND 20 TO 35 KT. SEAS 13 TO 18 FT.
.TUE NIGHT...E WIND 25 TO 40 KT. SEAS 14 TO 22 FT.
.WED...SE WIND 25 TO 40 KT. SEAS 17 TO 24 FT.
.THU...SE WIND 25 KT. SEAS 11 TO 15 FT.
.FRI...SE WIND UP TO 15 KT. SEAS 8 FT.

$$

PKZ352-031330-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W-
351 PM AKDT SUN APR 2 2017

...GALE WARNING THROUGH MONDAY...

.TONIGHT...E WIND 10 TO 25 KT INCREASING TO 25 TO 40 KT AFTER
MIDNIGHT. SEAS 8 TO 11 FT. RAIN.
.MON...SE WIND 30 TO 45 KT. SEAS 12 TO 18 FT. RAIN.
.MON NIGHT...SE WIND 20 TO 30 KT. SEAS 14 TO 19 FT. RAIN.
.TUE...E WIND 15 TO 30 KT. SEAS 11 TO 19 FT.
.TUE NIGHT...NE WIND 15 TO 30 KT. SEAS 10 TO 18 FT.
.WED THROUGH THU...S WIND 15 TO 25 KT. SEAS 10 TO 18 FT.
.FRI...S WIND 15 KT. SEAS 8 FT.

$$

787 
FZAK61 PAFC 031147
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
347 AM AKDT MON APR 3 2017

OFFSHORE WATERS FORECAST FOR THE GULF OF ALASKA WEST OF 144W

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.

PKZ399-040130-
347 AM AKDT MON APR 3 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A STRONG FRONT WILL ENTER THE SOUTHERN GULF THIS MORNING AND MOVE
TO THE NORTHERN GULF THIS AFTERNOON...THEN STALL ALONG THE NORTH 
GULF COAST THROUGH TUE AFTERNOON. THE ASSOCIATED 970 MB NORTH 
PACIFIC LOW WILL MOVE TO 55N 152W AT 974 MB TONIGHT...THEN STALL 
AND DISSIPATE TUE AFTERNOON. ANOTHER NORTH PACIFIC LOW WILL MOVE 
TO 56N 145W AT 968 MB TUE NIGHT.

$$

PKZ351-040130-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W-
347 AM AKDT MON APR 3 2017

...STORM WARNING THROUGH TONIGHT...

.TODAY...E WIND 25 TO 40 KT INCREASING TO 35 TO 50 KT IN THE
AFTERNOON. SEAS 11 TO 19 FT. RAIN.
.TONIGHT...SE WIND 35 TO 50 KT DIMINISHING TO 20 TO 30 KT AFTER
MIDNIGHT. SEAS 15 TO 23 FT. RAIN SHOWERS.
.TUE...E WIND 20 TO 30 KT INCREASING TO 25 TO 40 KT IN THE
AFTERNOON. SEAS 14 TO 19 FT. RAIN.
.TUE NIGHT...E WIND 25 TO 40 KT. SEAS 13 TO 21 FT.
.WED...SE WIND 25 TO 40 KT. SEAS 13 TO 21 FT.
.THU...SE WIND 15 TO 25 KT. SEAS 10 TO 15 FT.
.FRI...SE WIND UP TO 15 KT. SEAS 5 TO 8 FT.

$$

PKZ352-040130-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W-
347 AM AKDT MON APR 3 2017

...GALE WARNING TODAY...

.TODAY...SE WIND 30 TO 45 KT. SEAS 11 TO 19 FT. RAIN.
.TONIGHT...SE WIND 20 TO 30 KT. SEAS 13 TO 20 FT. RAIN SHOWERS.
.TUE...E WIND 15 TO 30 KT. SEAS 12 TO 19 FT. RAIN.
.TUE NIGHT...NE WIND 15 TO 30 KT. SEAS 9 TO 16 FT.
.WED THROUGH THU...S WIND 10 TO 25 KT. SEAS 10 TO 16 FT.
.FRI...S WIND UP TO 15 KT. SEAS 6 TO 9 FT.

$$

298 
FZAK61 PAFC 032335
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
335 PM AKDT MON APR 3 2017

OFFSHORE WATERS FORECAST FOR THE GULF OF ALASKA WEST OF 144W

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.

PKZ399-041315-
335 PM AKDT MON APR 3 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A STRONG WEATHER FRONT WILL STALL ALONG THE NORTH GULF COAST TONIGHT
THEN WEAKEN TUE. A 968 MB LOW NEAR 53N 151W WILL MOVE TO 55N 154W AT
976 MB TUE. THIS LOW WILL THEN GET ABSORBED INTO A NORTH PACIFIC LOW
THAT WILL MOVE TO 56N 150W AT 969 MB WED AFTERNOON. 

$$

PKZ351-041315-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W-
335 PM AKDT MON APR 3 2017

...GALE WARNING THROUGH TUESDAY NIGHT...

.TONIGHT...SE WIND 30 TO 45 KT DIMINISHING TO 20 TO 30 KT AFTER
MIDNIGHT. SEAS 14 TO 21 FT. RAIN.
.TUE...E WIND 20 TO 35 KT. SEAS 14 TO 19 FT. RAIN.
.TUE NIGHT...E WIND 25 TO 40 KT. SEAS 13 TO 21 FT. RAIN.
.WED...SE WIND 20 TO 35 KT. SEAS 14 TO 19 FT.
.WED NIGHT...SE WIND 20 TO 30 KT. SEAS 13 TO 17 FT.
.THU...SE WIND 15 TO 30 KT. SEAS 10 TO 14 FT.
.FRI THROUGH SAT...W WIND UP TO 15 KT. SEAS 5 TO 8 FT.

$$

PKZ352-041315-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W-
335 PM AKDT MON APR 3 2017

...GALE WARNING TONIGHT...

.TONIGHT...SE WIND 25 TO 35 KT. SEAS 14 TO 20 FT. RAIN.
.TUE...E WIND 15 TO 30 KT. SEAS 12 TO 19 FT. RAIN.
.TUE NIGHT...N WIND 15 TO 30 KT. SEAS 9 TO 15 FT. RAIN.
.WED...SW WIND 15 TO 30 KT. SEAS 10 TO 15 FT.
.WED NIGHT...S WIND 15 TO 25 KT. SEAS 14 FT.
.THU...S WIND 15 TO 25 KT. SEAS 10 TO 14 FT.
.FRI THROUGH SAT...W WIND UP TO 15 KT. SEAS 6 TO 9 FT.

$$

514 
FZAK61 PAFC 041153
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
353 AM AKDT TUE APR 4 2017

OFFSHORE WATERS FORECAST FOR THE GULF OF ALASKA WEST OF 144W

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.

PKZ399-050045-
353 AM AKDT TUE APR 4 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A FRONT ALONG THE NORTH GULF COAST WILL WEAKEN LATER TODAY. A 973
MB LOW NEAR 53N 153W WILL DISSIPATE IN PLACE TONIGHT. A NORTH
PACIFIC LOW WILL MOVE TO 56N 145W AT 970 MB TONIGHT...THEN WILL MOVE
TO 56N 152W AT 975 MB WED NIGHT. 

$$

PKZ351-050045-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W-
353 AM AKDT TUE APR 4 2017

...GALE WARNING THROUGH WEDNESDAY...

.TODAY...E WIND 20 TO 30 KT INCREASING TO 30 TO 45 KT IN THE 
AFTERNOON. SEAS 13 TO 20 FT. RAIN.
.TONIGHT...E WIND 25 TO 40 KT. SEAS 14 TO 22 FT. RAIN.
.WED...E WIND 20 TO 35 KT. SEAS 14 TO 20 FT. RAIN SHOWERS.
.WED NIGHT...SE WIND 20 TO 30 KT. SEAS 12 TO 17 FT.
.THU THROUGH FRI...SE WIND 15 TO 30 KT. SEAS 9 TO 14 FT.
.SAT...S WIND 10 KT. SEAS 4 TO 7 FT.

$$

PKZ352-050045-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W-
353 AM AKDT TUE APR 4 2017

.TODAY...SE WIND 20 TO 30 KT. SEAS 12 TO 18 FT. RAIN.
.TONIGHT...N WIND 10 TO 25 KT. SEAS 8 TO 16 FT. RAIN.
.WED...SW WIND 10 TO 25 KT. SEAS 11 TO 14 FT. RAIN.
.WED NIGHT...S WIND 15 TO 30 KT. SEAS 11 TO 15 FT.
.THU THROUGH FRI...S WIND 15 TO 30 KT. SEAS 9 TO 16 FT.
.SAT...SW WIND 10 KT. SEAS 5 TO 8 FT.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
508 PM AKDT Fri Mar 31 2017

.ANALYSIS AND UPPER LEVELS...

An upper level trough over the eastern Bering and western Gulf of
Alaska continues to dig eastward across the Alaska Peninsula.
While the main associated upper level low is centered just east of
the Pribilof Islands, one potent upper level wave has been pushing
across the Kenai Peninsula this morning. The Anchorage overnight sounding
indicated steep lapse rates from about 700 mb to 300mb, and near
saturation. As a result, a wide swath of precipitation has been
occurring across the north Gulf coast this morning. Initially,
snow fell across typically downsloped areas of the Chugach. While
southeasterly downslope flow occurred from the surface to
mountain height, lapse rates remained steep at mountain level.
This allowed for the transportation of moisture across the Chugach
and countered the typical downslope hole. However, by mid-morning
a more stable layer became established at mountain layer, which
is supporting the current downslope hole across the Kenai
Peninsula and western Anchorage Bowl. Meanwhile, a 975 mb surface
low is located southeast of Sand Point and supporting widespread
showers across the southwest mainland. However, with some dry air
at lower levels, precipitation amounts generally have been
limited. &&

.MODEL DISCUSSION...
Models are in generally good agreement in the short term
synoptically as the low south of Sand Point weakens and drifts
towards the Kenai Peninsula. There is some uncertainty in the
models in the trajectory and intensity of the low towards
Saturday, so the more middle ground GFS was favored.

&&

.AVIATION...
PANC...With deep southeasterly flow and a stable layer at mountain
height, downsloping should keep conditions mainly in the VFR
category. However, local showers are possible along the Chugach
Mountains.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2)...
Moist onshore flow and several embedded disturbances will maintain
a wet and cloudy pattern through the weekend. Most of the
precipitation will remain confined to the north gulf coast, with
strong cross barrier flow over the coastal mountain ranges
limiting inland areas to just a few showers. Coastal precipitation
will be mostly rain at sea level through Saturday, with a few
inches of heavy, wet snow through the mountain passes.
Southwesterly cold air advection associated with an upper low
migrating into the gulf will help to drag snow levels back down
towards sea level Saturday night into Sunday, but precipitation
amounts should be light enough that any accumulations will be
limited. Farther inland, the strong downslope flow will help
daytime temperatures climb into the 40s this weekend from the Cook
Inlet region into the Mat-Su, as well as the Copper River Basin.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2)...
A frontal system currently extending from a surface low to the
southwest of Kodiak Island extends across Southwest Alaska.
Relatively warmer air in the Bristol Bay area is bringing a mix of
rain and snow, while colder air over the Kuskokwim Delta is
resulting in moderately heavy snow out of the deformation band
stretched across the delta. The deformation band will shift
further west this evening to stall along the coast tonight. Snow
amounts will be dependent on where this band stalls and updates
later in the evening may be possible. Troughing will remain over
stretched over Southwest Alaska Saturday and gradually weaken
Sunday.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2)...
Strong northwesterly winds blowing across the Alaska Peninsula
will turn more westerly as the surface low southwest of Kodiak
Island tracks northeast into the western Gulf. An upper low in
the eastern Bering with accompanying cold air aloft will cross the
Alaska Peninsula tonight. Ridging will build into the western
Bering Saturday and the central Bering Sunday, keeping the storm
track well south of the Aleutians.

&&

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

The weather next week looks fairly similar to the current weather
pattern, insofar as unsettled weather is expected to continue
across the Gulf of Alaska and southern Mainland. This will result
in the most persistent periods of precipitation along the
coastlines of the Gulf of Alaska, with interior areas such as
Anchorage seeing more showery or occasional rounds of rain and
snow. Temperatures will be closer to normal than in recent weeks,
with cloud-cover on any given day playing the biggest role in how
much melting can occur. The southwest mainland looks to stay a bit
more on the cool side of this pattern, but even these parts of the
state will see a trend toward more typical temperatures.

Meanwhile, the Bering Sea/Aleutians will spend the first half of
the week in continued cool and showery northerly flow, with a
weather front bringing in stormier and a bit warmer weather for
the latter half of the week.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Gale warning 130 131 132 150 155 351 352.
Heavy freezing spray 179.

&&

SYNOPSIS AND MODEL DISCUSSION... EN
SOUTHCENTRAL ALASKA...CB
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...JR
LONG TERM...AD