Gale Warning 342, NWS Anchorage, AK

258 
FZAK61 PAFC 050002
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
402 PM AKDT SUN JUN 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.

PKZ399-051315-
402 PM AKDT SUN JUN 4 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
HIGH PRESSURE LINGERS OVER THE NORTHERN GULF COAST AND 
SOUTHEASTERN ALASKA THROUGH TUESDAY. A 985 MB LOW WILL TRACK TO 
53N 147W MONDAY MORNING THEN TO 53N 151W AT 988 MB BY TUESDAY 
EVENING.

$$

PKZ351-051315-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W-
402 PM AKDT SUN JUN 4 2017

...GALE WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...E WIND 15 TO 25 KT. SEAS 5 TO 8 FT.
.MON...NE WIND 30 TO 40 KT. SEAS 8 TO 13 FT.
.MON NIGHT...E WIND 25 TO 40 KT BECOMING 30 KT AFTER MIDNIGHT.
SEAS 14 FT. RAIN.
.TUE...E WIND 15 TO 30 KT. SEAS 10 TO 14 FT.
.TUE NIGHT...E WIND 15 TO 25 KT. SEAS 8 TO 11 FT.
.WED THROUGH FRI...S WIND 10 TO 25 KT. SEAS 5 TO 10 FT.

$$

PKZ352-051315-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W-
402 PM AKDT SUN JUN 4 2017

...GALE WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...E WIND 20 TO 30 KT. SEAS 6 TO 10 FT.
.MON...NE WIND 25 TO 35 KT. SEAS 8 TO 12 FT. RAIN.
.MON NIGHT...E WIND 25 TO 35 KT. SEAS 14 FT. RAIN.
.TUE...E WIND 20 TO 30 KT. SEAS 10 TO 15 FT.
.TUE NIGHT...E WIND 10 TO 20 KT. SEAS 7 TO 10 FT.
.WED THROUGH FRI...SE WIND UP TO 20 KT. SEAS 4 TO 9 FT.

$$

081 
FZAK61 PAFC 051114
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
314 AM AKDT MON JUN 5 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.

PKZ399-060115-
314 AM AKDT MON JUN 5 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A FRONT ENTERS THE EASTERN GULF THIS MORNING BEFORE MOVING INTO THE 
WEST/NORTHERN GULF BY THIS AFTERNOON. THIS FRONT MOVES WESTWARD 
BEFORE EXITING THE REGION BY TUE AFTERNOON. A 991 MB LOW TRACKS NEAR 
56N 143W TUE EVENING MOVES TO 58N 150W AT 992 MB WED MORNING BEFORE 
MOVING TO 55N 154W AT 1000 MB WED AFTERNOON.

$$

PKZ351-060115-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W-
314 AM AKDT MON JUN 5 2017

...GALE WARNING THROUGH TONIGHT...

.TODAY...NE WIND 30 TO 40 KT. SEAS 8 TO 13 FT.
.TONIGHT...E WIND 25 TO 40 KT BECOMING 30 KT AFTER MIDNIGHT. SEAS
14 FT. RAIN.
.TUE...E WIND 30 KT DIMINISHING TO 15 TO 25 KT IN THE AFTERNOON.
SEAS 12 FT. RAIN.
.TUE NIGHT...E WIND 15 TO 25 KT. SEAS 9 TO 14 FT.
.WED...E WIND 10 TO 25 KT. SEAS 8 TO 13 FT.
.THU THROUGH FRI...SW WIND UP TO 15 KT. SEAS 3 TO 7 FT.

$$

PKZ352-060115-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W-
314 AM AKDT MON JUN 5 2017

...GALE WARNING THROUGH TONIGHT...

.TODAY...NE WIND 25 TO 35 KT. SEAS 11 FT.
.TONIGHT...E WIND 25 TO 35 KT. SEAS 14 FT.
.TUE...E WIND 30 KT. SEAS 11 TO 15 FT.
.TUE NIGHT...E WIND 10 TO 20 KT. SEAS 7 TO 11 FT.
.WED...NE WIND UP TO 20 KT. SEAS 5 TO 10 FT.
.THU THROUGH FRI...S WIND UP TO 15 KT. SEAS 5 FT.

$$

668 
FZAK61 PAFC 052358
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
358 PM AKDT MON JUN 5 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.

PKZ399-061330-
358 PM AKDT MON JUN 5 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A FRONT PUSHES ONSHORE OVER THE EASTERN GULF BY TUE AFTERNOON. A 
993 MB LOW ENTERS THE EASTERN GULF NEAR 56N 141W FOR MIDDAY TUE.
THIS LOW ARCHES NEAR THE NORTH GULF COAST THEN SHIFTS TO 55N 154W
AT 999 MB BY WED AFTERNOON. 

$$

PKZ351-061330-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W-
358 PM AKDT MON JUN 5 2017

...GALE WARNING TONIGHT...

.TONIGHT...E WIND 25 TO 40 KT. SEAS 13 TO 16 FT. RAIN.
.TUE...E WIND 25 KT. SEAS 9 TO 13 FT. RAIN.
.TUE NIGHT...E WIND 15 TO 30 KT. SEAS 9 TO 15 FT. RAIN.
.WED...E WIND 10 TO 25 KT. SEAS 8 TO 12 FT.
.WED NIGHT...NE WIND 10 TO 20 KT. SEAS 6 TO 9 FT.
.THU THROUGH SAT...SE WIND UP TO 15 KT. SEAS 3 TO 7 FT.

$$

PKZ352-061330-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W-
358 PM AKDT MON JUN 5 2017

...GALE WARNING TONIGHT...

.TONIGHT...E WIND 25 TO 35 KT. SEAS 14 FT.
.TUE...E WIND 15 TO 30 KT. SEAS 10 TO 13 FT.
.TUE NIGHT...E WIND 10 TO 20 KT. SEAS 6 TO 10 FT. RAIN.
.WED...E WIND UP TO 20 KT. SEAS 6 TO 10 FT.
.WED NIGHT...N WIND UP TO 15 KT. SEAS 5 TO 8 FT.
.THU THROUGH SAT...SE WIND UP TO 15 KT. SEAS 3 TO 8 FT.

$$

663 
FZAK61 PAFC 061110
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
310 AM AKDT TUE JUN 6 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.

PKZ399-070100-
310 AM AKDT TUE JUN 6 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A FRONT PUSHES ONSHORE OVER THE EASTERN GULF BY TUE AFTERNOON. A 
994 MB LOW ENTERS THE EASTERN GULF NEAR 56N 140W TUE AFTERNOON
BEFORE MOVING TO 57N 155W AT 995 MB WED MORNING. THIS SYSTEM MOVES
NEAR 53N 152W AT 1001 MB EARLY THU MORNING. A 999 MB LOW ENTERS 
THE EASTERN GULF NEAR 56N 142W THU AFTERNOON.

$$

PKZ351-070100-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W-
310 AM AKDT TUE JUN 6 2017

...GALE WARNING THROUGH TONIGHT...

.TODAY...E WIND 25 KT BECOMING 20 TO 35 KT IN THE AFTERNOON. SEAS
12 FT. RAIN.
.TONIGHT...SE WIND 25 TO 40 KT. SEAS 10 TO 17 FT. RAIN.
.WED...E WIND 10 TO 20 KT. SEAS 9 TO 12 FT.
.WED NIGHT...NE WIND UP TO 15 KT. SEAS 7 FT.
.THU...NE WIND UP TO 15 KT. SEAS 5 FT.
.FRI THROUGH SAT...SE WIND 10 KT. SEAS 4 FT.

$$

PKZ352-070100-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W-
310 AM AKDT TUE JUN 6 2017

...GALE WARNING TODAY...

.TODAY...E WIND 25 TO 35 KT DIMINISHING TO 10 TO 25 KT IN THE 
AFTERNOON. SEAS 9 TO 15 FT. RAIN.
.TONIGHT...SE WIND 10 TO 25 KT. SEAS 7 TO 11 FT. RAIN.
.WED...E WIND 10 TO 20 KT. SEAS 7 TO 11 FT.
.WED NIGHT...NE WIND 15 KT. SEAS 7 FT.
.THU...NW WIND UP TO 15 KT. SEAS 5 FT.
.FRI THROUGH SAT...SE WIND UP TO 15 KT. SEAS 5 TO 10 FT.

$$

959 
FZAK61 PAFC 062344
OFFAER

Offshore Waters Forecast
National Weather Service Anchorage AK
344 PM AKDT Tue Jun 6 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.

PKZ399-071345-
344 PM AKDT Tue Jun 6 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A 991 mb low near 56N 143W will strengthen to 989 mb as it moves 
to 57N 151W late tonight. This low will then gradually weaken to 
994 mb as it moves to 55N 154W Wed afternoon before moving south 
into the Pacific Ocean Wed evening.

$$

PKZ351-071345-
Gulf of Alaska Offshore North of 57N and West of 144W-
344 PM AKDT Tue Jun 6 2017

...GALE WARNING TONIGHT...

.TONIGHT...E wind 25 to 40 kt. Seas 10 to 17 ft. Rain.
.WED...E wind 10 to 25 kt. Seas 9 to 12 ft.
.WED NIGHT...NE wind 15 kt. Seas 8 ft. Rain.
.THU...NE wind 10 to 20 kt. Seas 5 ft.
.THU NIGHT...E wind 10 kt. Seas 5 ft.
.FRI THROUGH SAT...SE wind up to 20 kt. Seas 4 ft.
.SUN...S wind 15 kt. Seas 7 to 10 ft.

$$

PKZ352-071345-
Gulf of Alaska Offshore South of 57N North of 55N and West of
144W-
344 PM AKDT Tue Jun 6 2017

.TONIGHT...NE wind 10 to 25 kt becoming SE after midnight. Seas 7
to 11 ft. Rain.
.WED...E wind 10 to 20 kt. Seas 7 to 11 ft.
.WED NIGHT...NE wind 15 kt. Seas 7 ft.
.THU...NW wind 10 to 20 kt. Seas 6 ft.
.THU NIGHT...N wind up to 15 kt. Seas 5 ft.
.FRI THROUGH SUN...S wind 10 to 25 kt. Seas 5 to 10 ft.

$$

098 
FZAK61 PAFC 071130
OFFAER

Offshore Waters Forecast
National Weather Service Anchorage AK
330 AM AKDT Wed Jun 7 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.

PKZ399-080145-
330 AM AKDT Wed Jun 7 2017
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A 990 mb low near 56N 152W moves to 54N 154W at 997 mb this
afternoon...then moves into the North Pacific. A trough of low
pressure develops over the central Gulf tonight and persists
through Thu night.

$$

PKZ351-080145-
Gulf of Alaska Offshore North of 57N and West of 144W-
330 AM AKDT Wed Jun 7 2017

.TODAY...E wind 10 to 25 kt. Seas 9 to 12 ft.
.TONIGHT...NE wind 15 kt. Seas 7 ft. Rain.
.THU...NE wind 10 to 20 kt. Seas 4 to 7 ft.
.THU NIGHT...E wind 10 kt. Seas 3 to 6 ft.
.FRI THROUGH SAT...SE wind up to 15 kt. Seas 4 ft.
.SUN...S wind 15 kt. Seas 7 to 10 ft.

$$

PKZ352-080145-
Gulf of Alaska Offshore South of 57N North of 55N and West of
144W-
330 AM AKDT Wed Jun 7 2017

.TODAY...E wind 10 to 20 kt. Seas 7 to 10 ft.
.TONIGHT...NE wind 15 kt. Seas 8 ft.
.THU...NW wind 10 to 20 kt. Seas 6 ft.
.THU NIGHT...N wind up to 15 kt. Seas 4 ft.
.FRI THROUGH SUN...S wind up to 15 kt. Seas 5 to 10 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
450 PM AKDT Sat Jun 3 2017

.ANALYSIS AND UPPER LEVELS...

Satellite imagery indicates a wide swath of stratus and fog
across the Bristol Bay area and into the Kuskokwim Valley that has
gradually eroded this morning due to diurnal heating and mixing.
Meanwhile in Southcentral a stubborn stratus and fog layer has
lingered over much of Cook Inlet, however diurnal heating is
beginning to mix out this stable layer as well. The Anchorage
sounding this morning is convectively favorable with steep lapse
rates through much of the troposphere and a fairly moist
atmosphere. Already convection is beginning to fire off across the
western half of the Copper River Basin, indicating that the
atmosphere is favorable for convection in areas of steep terrain. Currently,
radar and satellite imagery show showers developing along the
foothills of the Alaska Range and the Kilbuck Mountains around
Aniak, with a few lightning strikes showing up as well.

Two upper level lows dominate the synoptic map this morning, with
one low in the southeast Gulf, and another just south of the
eastern Bering. A ridge covers the Alaska mainland. With no strong
upper level forcing, the convection across both Southcentral and
Southwest mainland areas will be heavily dependent on diurnal
forcing and form mainly along the mountains. While the steering
flow is from the west and would favor for showers to drift off the
mountains, with no upper level support in place, showers will
likely weaken as they drift away towards the valleys and more
populated areas.

&&

.MODEL DISCUSSION...
Models are in generally good agreement in the short term
synoptically as the upper level low south of the Bering gradually
drifts to the east, and the southeast Gulf of Alaska low
gradually weakens and then is pushed towards the north gulf coast.
Models disagree much more strongly on the intensity of shower
development and convective indices such as CAPE, with the NAM
favoring much higher values consistently. As a result, a middle
ground approach was chosen.

&&

.AVIATION...
PANC...VFR conditions and light winds will persist. Showers will
form along the mountains during the afternoon and evening hours.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2)...
An easterly wave currently pushing from the Yukon Territory into
the eastern Copper River Basin will spread rain to that area with
showers and isolated to scattered thunderstorms further west. The
strongest instability looks to be centered over the Talkeetna
Mountains and north and eastern Copper Basin, however isolated
thunderstorms are also possible along the Kenai Mountains and
Alaska Range. A similarly unstable pattern will develop again
Sunday afternoon and evening as another easterly wave moves
through bringing more showers and thunderstorms before conditions
stabilize early next week.

A gale force frontal system will lift northwest across the Gulf
on Monday reaching the northern Gulf coast Monday night. Another
frontal wave will lift from the eastern Gulf to northern Gulf
Tuesday.

&&

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

No major change in the overall pattern as high pressure building
in from the East continues to promote warm summer-like weather
over most of Southwest Alaska for the next couple of days. Strong
surface heating, with interior locations warming up well into the
70's, will lead to instability in the afternoon hours with pop-up
showers with some isolated thunderstorms possible over the higher
terrain. A weak pulse of energy rotating around the base of the
ridge will provide some forcing and moisture to increase chances
and coverage of shower and thunderstorm activity Sunday afternoon,
which will be focused along the Alaska Range and North through
the middle Kuskokwim Valley. Upper level steering flow from the
East will may push these storms West over the Kuskokwim Valley
Sunday evening.

On Tuesday, the ridge axis moves to the West and moisture wrapping
along the top of a low in the Gulf will lead to increased cloud
cover and continued chances of showers along the mountains and
foothills, though thunderstorm development will be limited.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2)...

The primary concern for the Aleutians will be a low pressure
system tracking South of the island chain, bringing soaking rains
and gale force winds out ahead of the center to places like Dutch
Harbor, Cold Bay, and Sand Point overnight. The low weakens and
shifts off to the Southeast by Sunday evening with a ridge of high
pressure building in behind it. The next system moves East over
the Western Aleutians by Monday evening.

&&

.LONG TERM FORECAST (Days 3 through 7)...
The pattern moving into the long term has a blocking high over
northwest Alaska with a relatively stationary low south of the
Gulf of Alaska. An elongated area of low pressure will be over the
far western Bering and that low will consolidate and track east
staying just south of the Aleutians through the week. The main
high and low will mostly stay in place into late next week
bringing moist, southeast flow to the southern mainland. Most of
the rain will stay along the coast with afternoon showers for
inland locations. On Thursday this pattern will break down making
way for the western low to move near the Alaska Peninsula Friday.
However, there is disagreement with where this low will end up
with some models bringing it north towards Bristol Bay and others
pushing it off into the North Pacific.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...NONE.
MARINE...Gale 150, 155.
FIRE WEATHER...NONE.

&&

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