Gale Warning 387, NWS Anchorage, AK

680 
FZAK62 PAFC 241149
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
349 AM AKDT TUE MAY 24 2016

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.

PKZ499-250200-
349 AM AKDT TUE MAY 24 2016
.SYNOPSIS FOR CENTRAL BERING SEA...
A 991 MB LOW NEAR 50N 166E WILL MOVE TO 52N 175E AT 995 MB WED
NIGHT.

$$

PKZ411-250200-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
349 AM AKDT TUE MAY 24 2016

...GALE WARNING THROUGH TONIGHT...

.TODAY...S WIND 20 TO 35 KT. SEAS 7 TO 12 FT. RAIN.
.TONIGHT...SE WIND 20 TO 35 KT. SEAS 9 TO 15 FT. RAIN.
.WED...SE WIND 15 TO 30 KT. SEAS 10 TO 15 FT.
.WED NIGHT...SE WIND 15 TO 25 KT. SEAS 9 TO 12 FT.
.THU THROUGH SAT...SE WIND 10 TO 25 KT. SEAS 6 TO 11 FT.

$$

PKZ412-250200-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
349 AM AKDT TUE MAY 24 2016

.TODAY...S WIND 20 KT. SEAS 7 FT. PATCHY FOG.
.TONIGHT...S WIND 20 TO 30 KT. SEAS 5 TO 10 FT.
.WED...S WIND 20 TO 30 KT. SEAS 8 TO 13 FT.
.WED NIGHT...SE WIND 25 KT. SEAS 10 TO 13 FT.
.THU...SE WIND 15 TO 30 KT. SEAS 7 TO 12 FT.
.FRI THROUGH SAT...E WIND UP TO 15 KT. SEAS 3 TO 6 FT.

$$

PKZ413-250200-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
349 AM AKDT TUE MAY 24 2016

...GALE WARNING TONIGHT AND WEDNESDAY...

.TODAY...SW WIND 10 TO 20 KT BECOMING S 15 TO 30 KT IN THE
AFTERNOON. SEAS 5 TO 8 FT. PATCHY FOG.
.TONIGHT...S WIND 20 TO 35 KT. SEAS 7 TO 12 FT. PATCHY FOG.
.WED...SE WIND 25 TO 35 KT. SEAS 9 TO 15 FT. RAIN.
.WED NIGHT...SE WIND 30 KT. SEAS 10 TO 14 FT.
.THU...SE WIND 15 TO 30 KT. SEAS 7 TO 12 FT.
.FRI THROUGH SAT...E WIND UP TO 15 KT. SEAS 4 TO 7 FT.

$$

PKZ414-250200-
BERING SEA OFFSHORE EAST OF 171W-
349 AM AKDT TUE MAY 24 2016

.TODAY...SW WIND 15 KT. SEAS 5 FT. PATCHY FOG.
.TONIGHT...S WIND 20 KT. SEAS 5 FT. PATCHY FOG.
.WED...S WIND 15 TO 25 KT. SEAS 4 TO 8 FT. PATCHY FOG.
.WED NIGHT...S WIND 10 TO 25 KT. SEAS 4 TO 9 FT.
.THU...SE WIND 10 TO 20 KT. SEAS 3 TO 8 FT.
.FRI THROUGH SAT...N WIND 10 TO 20 KT. SEAS 4 FT.

$$

981 
FZAK62 PAFC 242306
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
306 PM AKDT TUE MAY 24 2016

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.

PKZ499-251345-
306 PM AKDT TUE MAY 24 2016
.SYNOPSIS FOR CENTRAL BERING SEA...

A 988 MB LOW NEAR 51N 168E WILL MOVE TO 54N 174E AT 998 MB THU
AFTERNOON.

$$

PKZ411-251345-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
306 PM AKDT TUE MAY 24 2016

...GALE WARNING TONIGHT...

.TONIGHT...SE WIND 20 TO 35 KT. SEAS 9 TO 16 FT. RAIN.
.WED...SE WIND 15 TO 30 KT. SEAS 10 TO 15 FT.
.WED NIGHT...E WIND 10 TO 25 KT. SEAS 9 TO 12 FT.
.THU...E WIND 10 TO 25 KT. SEAS 8 TO 11 FT.
.THU NIGHT...SE WIND 10 TO 25 KT. SEAS 7 TO 11 FT.
.FRI THROUGH SUN...SE WIND 10 TO 20 KT. SEAS 4 TO 9 FT.

$$

PKZ412-251345-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
306 PM AKDT TUE MAY 24 2016

.TONIGHT...S WIND 15 TO 30 KT. SEAS 6 TO 11 FT. RAIN.
.WED...S WIND 20 TO 30 KT. SEAS 9 TO 14 FT. PATCHY FOG. RAIN.
.WED NIGHT...SE WIND KT 20 TO 30. SEAS 12 FT. PATCHY FOG.
.THU...SE WIND 20 TO 30 KT. SEAS 11 FT.
.THU NIGHT...SE WIND 15 TO 25 KT. SEAS 8 TO 12 FT.
.FRI THROUGH SUN...SE WIND 10 TO 25 KT. SEAS 4 TO 9 FT.

$$

PKZ413-251345-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
306 PM AKDT TUE MAY 24 2016

...GALE WARNING TONIGHT...

.TONIGHT...S WIND 20 TO 35 KT. SEAS 7 TO 12 FT. RAIN.
.WED...SE WIND 30 KT. SEAS 9 TO 15 FT. PATCHY FOG. RAIN.
.WED NIGHT...SE WIND 30 KT. SEAS 11 TO 14 FT. PATCHY FOG.
.THU...SE WIND 30 KT. SEAS 9 TO 12 FT.
.THU NIGHT...SE WIND 15 TO 25 KT. SEAS 6 TO 11 FT.
.FRI THROUGH SAT...E WIND UP TO 15 KT. SEAS 3 TO 7 FT.
.SUN...SE WIND 10 TO 25 KT. SEAS 4 TO 9 FT.

$$

PKZ414-251345-
BERING SEA OFFSHORE EAST OF 171W-
306 PM AKDT TUE MAY 24 2016

.TONIGHT...S WIND 20 KT. SEAS 5 FT. PATCHY FOG.
.WED...S WIND 15 TO 25 KT. SEAS 4 TO 8 FT. PATCHY FOG.
.WED NIGHT...SE WIND 10 TO 25 KT. SEAS 4 TO 9 FT. PATCHY FOG.
.THU...SE WIND 10 TO 20 KT. SEAS 5 TO 9 FT.
.THU NIGHT...E WIND 10 TO 20 KT. SEAS 3 TO 8 FT.
.FRI THROUGH SAT...NE WIND UP TO 15 KT. SEAS 4 FT.
.SUN...SE WIND UP TO 20 KT. SEAS 3 TO 4 FT.

$$

710 
FZAK62 PAFC 251153
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
353 AM AKDT WED MAY 25 2016

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.

PKZ499-260130-
353 AM AKDT WED MAY 25 2016
.SYNOPSIS FOR CENTRAL BERING SEA...
A 988 MB LOW NEAR 52N 170E WILL MOVE TO 56N 174E AT 1001 MB THU
NIGHT.

$$

PKZ411-260130-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
353 AM AKDT WED MAY 25 2016

.TODAY...SE WIND 20 TO 30 KT. SEAS 10 TO 15 FT.
.TONIGHT...S TO E WIND 20 KT. SEAS 8 TO 12 FT.
.THU...SE WIND 10 TO 25 KT. SEAS 7 TO 12 FT. RAIN.
.THU NIGHT...S WIND 10 TO 25 KT. SEAS 7 TO 12 FT.
.FRI...S WIND UP TO 20 KT. SEAS 5 TO 10 FT.
.SAT THROUGH SUN...SE WIND 10 TO 20 KT. SEAS 4 TO 9 FT.

$$

PKZ412-260130-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
353 AM AKDT WED MAY 25 2016

.TODAY...S WIND 20 TO 30 KT. SEAS 9 TO 14 FT. PATCHY FOG. RAIN.
.TONIGHT...SE WIND 20 TO 30 KT. SEAS 11 TO 14 FT. PATCHY FOG.
.THU...SE WIND 20 TO 30 KT. SEAS 10 TO 13 FT. AREAS OF FOG.
.THU NIGHT...SE WIND 15 TO 25 KT. SEAS 8 TO 12 FT.
.FRI THROUGH SUN...SE WIND 10 TO 25 KT. SEAS 4 TO 9 FT.

$$

PKZ413-260130-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
353 AM AKDT WED MAY 25 2016

...GALE WARNING TODAY...

.TODAY...SE WIND 25 TO 35 KT. SEAS 9 TO 15 FT. PATCHY FOG. RAIN.
.TONIGHT...SE WIND 20 TO 30 KT. SEAS 11 TO 14 FT. PATCHY FOG.
.THU...SE WIND 30 KT. SEAS 9 TO 13 FT. PATCHY FOG.
.THU NIGHT...SE WIND 15 TO 25 KT. SEAS 6 TO 11 FT.
.FRI...S WIND UP TO 15 KT. SEAS 3 TO 8 FT.
.SAT...E WIND UP TO 15 KT. SEAS 3 FT.
.SUN...SE WIND 10 TO 25 KT. SEAS 4 TO 9 FT.

$$

PKZ414-260130-
BERING SEA OFFSHORE EAST OF 171W-
353 AM AKDT WED MAY 25 2016

.TODAY...S WIND 15 TO 25 KT. SEAS 5 TO 8 FT. PATCHY FOG.
.TONIGHT...SE WIND 10 TO 25 KT. SEAS 5 TO 9 FT. PATCHY FOG.
.THU...SE WIND 10 TO 25 KT. SEAS 5 TO 9 FT. AREAS OF FOG.
.THU NIGHT...E WIND 10 TO 20 KT. SEAS 4 TO 8 FT.
.FRI THROUGH SAT...NE WIND UP TO 15 KT. SEAS 4 FT.
.SUN...SE WIND UP TO 20 KT. SEAS 3 TO 4 FT.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
502 AM AKDT MON MAY 23 2016

.ANALYSIS AND UPPER LEVELS...
A zonal pattern is present over the area with a couple of
shortwaves moving through. The first is pushing through the
Southcentral from the west and bringing light rain to the area.
The second is over the Central Bering and is also producing rain
as it moves east. In between the two shortwaves, weak ridging
is moving in over southwest Alaska.

&&

.MODEL DISCUSSION...
The models are in good agreement through the mid term with the
exception of the low approaching the Western Aleutians Tuesday.
The GEM and EC keep a more northern track than do the GFS and NAM.
The more southern track of the GFS and NAM was preferred.

&&

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

Rain continues to develop along a weak frontal boundary through
the morning from the Talkeetna Mountains south toward the eastern
Kenai and Western Prince William Sound. The boundary will shift
slowly east by this afternoon keeping most of the rain activity
along the northeast Gulf coast and the higher terrain of the
Copper River Valley. A thermal trough across the Yukon extends
across the eastern Alaska Range in the afternoon bringing a focus
for heavier shower activity. Thunderstorms are not expected to
develop as cloud cover should limit instability; however, an
isolated strike or two cannot be ruled out as the upper low pushes
a strong shortwave across the eastern range late this afternoon
and early evening.

Most areas behind the upper low will experience breaks in the
clouds this afternoon and late evening as transient ridging aloft
moves in from the west. At the surface...weak low pressure
becomes stationary along the northeast Gulf tonight as a ridge
builds across the southwest mainland. This regime sets up offshore
flow across the southern mainland with gusty conditions expected
along channeled terrain. Another upper wave moves in from the
southwest at a fast pace without an associated surface
front...therefore only light showers are expected into Tuesday
morning with a greater chance to see accumulations across the
eastern Alaska Range as the thermal trough remains along the
Alcan border.

&&

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

One more good shot of rainfall is expected across Southwest Alaska
during the day today as an upper level trough swings through the
region. Rainfall should quickly taper off from west to east with
this quick moving trough with most locations seeing an end of
rainfall by midnight tonight. Weak surface high pressure will
begin to build across the Bristol Bay area late this morning and
continue to build across the Y-K Delta and Kuskokwim Valley by
Tuesday afternoon. This high pressure will help keep the weather
on the dry side through Wednesday after nearly a week of on and
off rainfall. The high pressure overall is rather unimpressive
which will allow some rainfall associated with weak shortwaves
traversing the zonal flow over the Bering Sea to return to the
Kuskokwim Delta and Kuskokwim Valley Wednesday night into
Thursday.

Temperatures have been slower to warm up than expected because a
tap into the arctic air mass over the Beaufort and Chukchi Seas
continues. This feed of cooler air should get cut off Tuesday
afternoon which will allow temperatures to warm back to near
normal temperatures by Wednesday.

&&

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

Zonal flow will continue across the Bering Sea through Tuesday
afternoon before a deepening upper level low moves near Shemya.
Rain chances through Tuesday morning will be largely suppressed by
weak high pressure building across the region from the North
Pacific. This high pressure will act as a double-edged sword as it
should allow some pretty nice fog development with subsidence
keeping moisture trapped at the lowest levels of the atmosphere.
An approaching upper level and surface low on Tuesday will help
displace this fog as mixing will become more readily available
with the departure of the high pressure system.

Models have been in pretty solid agreement in both timing and
location of the low near Shemya Tuesday morning which leads to
high confidence that gale force winds will be seen across the
western Aleutians on Tuesday and a few gale force gusts could be
seen over the central Aleutians on Wednesday. Based on the PASY
RAOB and forecast soundings, it appears an unseasonably moist air
mass will be advected into the Bering Sea which will help bring
heavy rain to the Western and Central Aleutians on Tuesday and
Wednesday.

&&

.LONG TERM FORECAST (Days 3 through 7)...
The Southcentral mainland, and the southwest Alaska regions will
have drier conditions as high pressure builds into the region by
Tuesday afternoon through Thursday morning. While the northern
Gulf of Alaska will have a weak low by Tuesday resulting in
moisture along the coastal communities before tracking to the
lower southwestern Gulf by Thursday. Then an upper level shortwave
drops down from the north, and tracks along the Alaska Range
before a secondary shortwave digs farther south into the base of
the trough over the Southwest Alaska region by Thursday morning.
This synoptic feature will develop into a closed low along the
Alaska Peninsula by Saturday. Therefore, the southwest Alaska
region, Gulf of Alaska, and the northern coastal communities will
see slightly cooler temperatures with increased cloud cover going
into next weekend. On the Bering Sea side, they will be under the
influence of an amplified ridge of high pressure heading into the
midweek. This synoptic feature will gradually move eastward before
developing into a strong closed high pressure over the eastern
Aleutians by Thursday. This upper level closed high will further
strengthen, extend through the western Bering Sea into the eastern
Siberian region heading into next weekend. Look for marine layer
stratus and fog to develop throughout next week for the Bering
Sea and the Aleutians. This high pressure will keep systems out
of the Bering Sea except for the western Aleutians being affected
slightly as systems track by into the northern Pacific Ocean. The
forecast confidence remains average as the models have become
better aligned for next week.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Gales...177 178.

&&

SYNOPSIS AND MODEL DISCUSSION...dk
SOUTHCENTRAL ALASKA...kh
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...mc
LONG TERM...pd