Alert archive / Alaska / Gale Warnings in 2018

Gale Warning 111, NWS Anchorage, AK

February 10, 2018

NWS Anchorage, AK issued this gale warning at Feb 10, 2018, 3:43 PM AKST. It was in force for 60 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 10, 2018, 3:43 PM AKST (00:43 UTC)
Expired
Feb 13, 2018, 3:25 AM AKST
In force
60 hr
Issued by
NWS Anchorage, AK

The text

As transmitted.

544 
FZAK62 PAFC 110043
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
343 PM AKST Sat Feb 10 2018

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.

PKZ499-111415-
343 PM AKST Sat Feb 10 2018
.SYNOPSIS FOR CENTRAL BERING SEA...

A 993 mb low at 56N 166W moves into the Gulf of Anadyr Sun 
afternoon at 998 mb. A 995 mb low at 51N 164W Sun afternoon moves
over Bristol Bay Sun evening at 997 mb and then moves inland Sun
night. A strong front moves over the western Bering Mon 
afternoon.

$$

PKZ411-111415-
Bering Sea Offshore West of 180 and East of the International
Dateline-
343 PM AKST Sat Feb 10 2018

...GALE WARNING SUNDAY NIGHT...

.TONIGHT...W wind 10 to 15 kt. Seas 7 ft.
.SUN...W wind 10 to 20 kt. Seas 6 ft.
.SUN NIGHT...S wind 15 to 30 kt increasing to 25 to 40 kt after
midnight. Seas 7 to 12 ft. Snow and rain.
.MON...S wind 30 to 45 kt. Seas 12 to 20 ft.
.MON NIGHT...SW wind 20 to 30 kt. Seas 19 to 23 ft.
.TUE...SW wind 20 to 30 kt. Seas 19 to 25 ft.
.WED...S wind 15 kt. Seas 9 to 13 ft.
.THU...SE wind up to 20 kt. Seas 8 ft.

$$

PKZ412-111415-
Bering Sea Offshore 171W to 180 and North of 56N-
343 PM AKST Sat Feb 10 2018

.TONIGHT...NW wind 10 to 25 kt. Seas 6 to 9 ft.
.SUN...W wind 10 to 25 kt. Seas 8 ft.
.SUN NIGHT...W wind 15 to 25 kt. Seas 6 to 10 ft.
.MON...S wind 25 to 40 kt. Seas 9 to 14 ft.
.MON NIGHT...S wind 25 to 40 kt. Seas 12 to 20 ft.
.TUE THROUGH THU...SE wind 15 to 30 kt. Seas 11 to 19 ft.

$$

PKZ413-111415-
Bering Sea Offshore 171W to 180 and South of 56N-
343 PM AKST Sat Feb 10 2018

.TONIGHT...W wind 15 to 25 kt. Seas 7 to 10 ft.
.SUN...NW wind 20 kt. Seas 6 to 9 ft.
.SUN NIGHT...W to S wind 15 to 30 kt. Seas 7 ft.
.MON...S wind 30 to 45 kt. Seas 11 to 19 ft.
.MON NIGHT...SW wind 30 to 45 kt. Seas 14 to 22 ft.
.TUE THROUGH THU...S wind 10 to 25 kt. Seas 11 to 19 ft.

$$

PKZ414-111415-
Bering Sea Offshore East of 171W-
343 PM AKST Sat Feb 10 2018

.TONIGHT...S wind 10 to 25 kt. Seas 7 ft.
.SUN...SW wind 10 to 20 kt. Seas 7 ft.
.SUN NIGHT...NW wind 15 to 30 kt. Seas 5 to 10 ft.
.MON...W wind 15 to 25 kt. Seas 7 to 11 ft.
.MON NIGHT...S wind 25 to 40 kt. Seas 9 to 17 ft.
.TUE...SW wind 20 to 35 kt. Seas 11 to 19 ft.
.WED THROUGH THU...SE wind 10 to 25 kt. Seas 8 to 13 ft.

$$
5 follow-up statements
408 
FZAK62 PAFC 111226
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
326 AM AKST Sun Feb 11 2018

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.

PKZ499-120215-
326 AM AKST Sun Feb 11 2018
.SYNOPSIS FOR CENTRAL BERING SEA...
A 998 mb low at 59N 175W moves to 68N 167W at 1000 mb Mon 
afternoon. A 985 mb low near 45N 167W moves to 60N 163W at 995 mb
by Midnight Sunday. The associated front sweeps across the Gulf 
of Alaska through Tue morning. A 956 mb Kamchatka low pushes a 
front over the Western Aleutians for Tue morning.


$$

PKZ411-120215-
Bering Sea Offshore West of 180 and East of the International
Dateline-
326 AM AKST Sun Feb 11 2018

...GALE WARNING TONIGHT AND MONDAY...

.TODAY...W wind 10 to 20 kt. Seas 6 ft.
.TONIGHT...S wind 15 to 30 kt increasing to 25 to 40 kt after
midnight. Seas 7 to 12 ft. Snow and rain.
.MON...S wind 30 to 45 kt. Seas 13 to 21 ft. Rain and snow.
.MON NIGHT...SW wind 30 kt. Seas 18 to 21 ft.
.TUE THROUGH WED...S wind 15 to 30 kt. Seas 13 to 21 ft.
.THU...SE wind up to 15 kt. Seas 8 to 13 ft.

$$

PKZ412-120215-
Bering Sea Offshore 171W to 180 and North of 56N-
326 AM AKST Sun Feb 11 2018

...GALE WARNING MONDAY...

.TODAY...W wind 10 to 25 kt. Seas 8 ft.
.TONIGHT...W wind 15 to 25 kt. Seas 6 to 10 ft.
.MON...SW wind 15 to 30 kt becoming S 25 to 40 kt in the
afternoon. Seas 6 to 9 ft building to 9 to 17 ft in the afternoon. 
Rain.
.MON NIGHT...S wind 25 to 40 kt. Seas 13 to 21 ft.
.TUE...SW wind 15 to 30 kt. Seas 15 to 22 ft.
.WED THROUGH THU...SE wind 10 to 20 kt. Seas 11 to 19 ft.

$$

PKZ413-120215-
Bering Sea Offshore 171W to 180 and South of 56N-
326 AM AKST Sun Feb 11 2018

...GALE WARNING MONDAY...

.TODAY...NW wind 15 to 25 kt. Seas 7 ft.
.TONIGHT...W wind 15 to 30 kt. Seas 5 to 9 ft.
.MON...S wind 30 to 45 kt. Seas 11 to 19 ft. Rain.
.MON NIGHT...SW wind 30 to 45 kt. Seas 15 to 23 ft.
.TUE...SW wind 15 to 30 kt. Seas 12 to 20 ft.
.WED THROUGH THU...S wind up to 15 kt. Seas 8 to 16 ft.

$$

PKZ414-120215-
Bering Sea Offshore East of 171W-
326 AM AKST Sun Feb 11 2018

.TODAY...SW wind 10 to 20 kt. Seas 7 ft.
.TONIGHT...NW wind 15 to 30 kt. Seas 6 to 11 ft.
.MON...W wind 15 to 25 kt. Seas 7 to 11 ft.
.MON NIGHT...S wind 25 to 40 kt. Seas 9 to 17 ft.
.TUE...SW wind 25 to 40 kt. Seas 11 to 19 ft.
.WED THROUGH THU...SE wind up to 15 kt. Seas 8 to 13 ft.

$$
002 
FZAK62 PAFC 120000
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
300 PM AKST Sun Feb 11 2018

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.

PKZ499-121500-
300 PM AKST Sun Feb 11 2018
.SYNOPSIS FOR CENTRAL BERING SEA...

A 994 mb low at 54N 164W moves over Bristol Bay this evening and 
then moves inland. A front associated with a Kamchatka low enters the
western Bering tonight. The front moves over the central Bering Mon 
night and reaches the eastern Bering Tue afternoon.

$$

PKZ411-121500-
Bering Sea Offshore West of 180 and East of the International
Dateline-
300 PM AKST Sun Feb 11 2018

...GALE WARNING THROUGH MONDAY...

.TONIGHT...S wind 15 to 30 kt increasing to 25 to 40 kt after
midnight. Seas 7 to 12 ft. Snow and rain.
.MON...S wind 25 to 40 kt. Seas 12 to 20 ft. Rain.
.MON NIGHT...SW wind 20 to 30 kt. Seas 17 to 21 ft. Rain showers
and snow showers.
.TUE...SW wind 30 kt. Seas 19 to 22 ft.
.TUE NIGHT...S wind 20 to 30 kt. Seas 17 to 21 ft.
.WED...SE wind 10 to 25 kt. Seas 12 to 20 ft.
.THU THROUGH FRI...SE wind up to 15 kt. Seas 9 to 17 ft.

$$

PKZ412-121500-
Bering Sea Offshore 171W to 180 and North of 56N-
300 PM AKST Sun Feb 11 2018

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

.TONIGHT...W wind 15 to 30 kt. Seas 6 to 10 ft.
.MON...S wind 15 to 30 kt increasing to 25 to 40 kt in the
afternoon. Seas 6 to 9 ft building to 8 to 16 ft in the afternoon.
Rain.
.MON NIGHT...S wind 25 to 40 kt. Seas 15 to 23 ft. Rain.
.TUE...SW wind 20 to 30 kt. Seas 18 to 25 ft.
.TUE NIGHT...SW wind 15 to 30 kt. Seas 15 to 20 ft.
.WED THROUGH FRI...SE wind 10 to 25 kt. Seas 10 to 18 ft.

$$

PKZ413-121500-
Bering Sea Offshore 171W to 180 and South of 56N-
300 PM AKST Sun Feb 11 2018

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

.TONIGHT...SW wind 15 to 30 kt. Seas 6 to 9 ft.
.MON...S wind 30 to 45 kt. Seas 11 to 19 ft. Rain.
.MON NIGHT...S wind 30 to 45 kt. Seas 16 to 24 ft. Rain.
.TUE...SW wind 15 to 30 kt. Seas 14 to 22 ft.
.TUE NIGHT...S wind 10 to 25 kt. Seas 11 to 19 ft.
.WED...SE wind 10 to 25 kt. Seas 10 to 16 ft.
.THU THROUGH FRI...S wind up to 20 kt. Seas 9 to 16 ft.

$$

PKZ414-121500-
Bering Sea Offshore East of 171W-
300 PM AKST Sun Feb 11 2018

...GALE WARNING MONDAY NIGHT...

.TONIGHT...W wind 15 to 30 kt. Seas 6 to 11 ft.
.MON...W wind 20 to 30 kt. Seas 7 to 12 ft.
.MON NIGHT...S wind 25 to 40 kt. Seas 9 to 17 ft.
.TUE...S wind 25 to 40 kt. Seas 13 to 21 ft.
.TUE NIGHT...SW wind 10 to 25 kt. Seas 10 to 18 ft.
.WED THROUGH FRI...S wind up to 20 kt. Seas 8 to 13 ft.

$$
685 
FZAK62 PAFC 121221
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
321 AM AKST Mon Feb 12 2018

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.

PKZ499-130230-
321 AM AKST Mon Feb 12 2018
.SYNOPSIS FOR CENTRAL BERING SEA...
A front over the Alaska Peninsula enters the Gulf of Alaska Mon
afternoon. A 956 mb Kamchatka low extends a front that pushes into 
the Eastern Aleutians by Wed morning. A 987 mb North Pacific low 
moves to 46N 173E for Wed morning.

$$

PKZ411-130230-
Bering Sea Offshore West of 180 and East of the International
Dateline-
321 AM AKST Mon Feb 12 2018

...GALE WARNING THROUGH TUESDAY...

.TODAY...S wind 25 to 40 kt. Seas 11 to 19 ft. Rain and snow.
.TONIGHT...SW wind 25 to 40 kt. Seas 17 to 23 ft. Snow showers and
rain showers.
.TUE...SW wind 25 to 35 kt. Seas 19 to 22 ft.
.TUE NIGHT...SW wind 30 kt. Seas 17 to 23 ft.
.WED...SE wind 20 to 35 kt. Seas 12 to 20 ft.
.THU THROUGH FRI...S wind 20 to 35 kt. Seas 12 to 20 ft.

$$

PKZ412-130230-
Bering Sea Offshore 171W to 180 and North of 56N-
321 AM AKST Mon Feb 12 2018

...GALE WARNING THROUGH TUESDAY...

.TODAY...S wind 15 to 30 kt increasing to 25 to 40 kt in the
afternoon. Seas 6 to 9 ft building to 8 to 16 ft in the afternoon.
Snow and rain.
.TONIGHT...S wind 30 to 45 kt. Seas 14 to 22 ft building to 21 to
28 ft after midnight. Rain and snow.
.TUE...SW wind 25 to 40 kt becoming 30 kt in the afternoon. Seas
19 to 26 ft.
.TUE NIGHT...SW wind 15 to 30 kt. Seas 16 to 21 ft.
.WED THROUGH FRI...S wind 20 to 35 kt. Seas 11 to 19 ft.

$$

PKZ413-130230-
Bering Sea Offshore 171W to 180 and South of 56N-
321 AM AKST Mon Feb 12 2018

...STORM WARNING TONIGHT...

.TODAY...S wind 30 to 45 kt. Seas 11 to 19 ft. Rain.
.TONIGHT...S wind 35 to 50 kt. Seas 15 to 22 ft building to 22 to 27
ft after midnight. Rain.
.TUE...SW wind 30 to 45 kt diminishing to 15 to 30 kt in the
afternoon. Seas 15 to 25 ft. Rain.
.TUE NIGHT...SW wind 15 to 30 kt. Seas 13 to 19 ft.
.WED...SE wind 20 to 35 kt. Seas 12 to 16 ft.
.THU THROUGH FRI...S wind 20 to 35 kt. Seas 12 to 19 ft.

$$

PKZ414-130230-
Bering Sea Offshore East of 171W-
321 AM AKST Mon Feb 12 2018

...GALE WARNING TONIGHT AND TUESDAY...

.TODAY...W wind 20 to 30 kt. Seas 7 to 11 ft.
.TONIGHT...S wind 30 to 45 kt. Seas 8 to 13 ft building to 11 to
19 ft after midnight.
.TUE...S wind 30 to 45 kt. Seas 15 to 23 ft. Rain.
.TUE NIGHT...SW wind 15 to 30 kt. Seas 12 to 18 ft.
.WED THROUGH FRI...S wind 15 to 30 kt. Seas 9 to 17 ft.

$$
766 
FZAK62 PAFC 130005
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
305 PM AKST Mon Feb 12 2018

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.

PKZ499-131400-
305 PM AKST Mon Feb 12 2018
.SYNOPSIS FOR CENTRAL BERING SEA...

A front extending from a 962 mb Kamchatka low will move east
across the Bering and Aleutian chain through Wed morning. A 987 
mb North Pacific low will move to near 49N 179W by Wed afternoon.

$$

PKZ411-131400-
Bering Sea Offshore West of 180 and East of the International
Dateline-
305 PM AKST Mon Feb 12 2018

...GALE WARNING TONIGHT...

.TONIGHT...SW wind 25 to 40 kt. Seas 17 to 23 ft. Rain and snow
showers.
.TUE...SW wind 30 kt. Seas 19 to 22 ft. Snow showers.
.TUE NIGHT...SW wind 20 to 30 kt. Seas 16 to 21 ft.
.WED...S wind 10 to 25 kt. Seas 12 to 19 ft.
.WED NIGHT...NE wind 15 to 30 kt. Seas 9 to 15 ft.
.THU...SW wind 20 to 35 kt. Seas 9 to 14 ft.
.FRI THROUGH SAT...SW wind 15 to 30 kt. Seas 14 to 21 ft.

$$

PKZ412-131400-
Bering Sea Offshore 171W to 180 and North of 56N-
305 PM AKST Mon Feb 12 2018

...GALE WARNING THROUGH TUESDAY...

.TONIGHT...S wind 30 to 45 kt. Seas 14 to 22 ft building to 21 to
26 ft after midnight. Rain and snow.
.TUE...SW wind 25 to 35 kt. Seas 20 to 25 ft.
.TUE NIGHT...SW wind 20 to 30 kt. Seas 16 to 20 ft.
.WED...S wind 10 to 25 kt. Seas 13 to 17 ft.
.WED NIGHT...E wind 20 to 35 kt. Seas 12 to 16 ft.
.THU THROUGH FRI...S wind 20 to 35 kt. Seas 11 to 19 ft.
.SAT...S wind 10 to 25 kt. Seas 15 to 19 ft.

$$

PKZ413-131400-
Bering Sea Offshore 171W to 180 and South of 56N-
305 PM AKST Mon Feb 12 2018

...STORM WARNING TONIGHT...

.TONIGHT...S wind 35 to 50 kt. Seas 15 to 26 ft. Rain.
.TUE...SW wind 20 to 35 kt. Seas 15 to 23 ft.
.TUE NIGHT...SW wind 15 to 30 kt. Seas 12 to 19 ft.
.WED...SE wind 15 to 30 kt. Seas 12 to 15 ft.
.WED NIGHT...E wind 20 to 35 kt. Seas 9 to 14 ft.
.THU THROUGH FRI...S wind 25 to 40 kt. Seas 13 to 21 ft.
.SAT...S wind 10 to 20 kt. Seas 13 to 20 ft.

$$

PKZ414-131400-
Bering Sea Offshore East of 171W-
305 PM AKST Mon Feb 12 2018

...GALE WARNING THROUGH TUESDAY...

.TONIGHT...S wind 30 to 45 kt. Seas 9 to 17 ft. Rain.
.TUE...S wind 30 to 45 kt becoming SW 20 to 35 kt in the
afternoon. Seas 14 to 22 ft. Rain.
.TUE NIGHT...SW wind 15 to 30 kt diminishing to 10 to 20 kt after
midnight. Seas 11 to 18 ft. Rain.
.WED...S wind up to 20 kt. Seas 8 to 12 ft.
.WED NIGHT...E wind 15 to 30 kt. Seas 8 to 12 ft.
.THU THROUGH SAT...S wind 15 to 30 kt. Seas 9 to 17 ft.

$$
006 
FZAK62 PAFC 131225
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
325 AM AKST Tue Feb 13 2018

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.

PKZ499-140200-
325 AM AKST Tue Feb 13 2018
.SYNOPSIS FOR CENTRAL BERING SEA...

A 963 mb Kamchatka low brings a front through the Central Aleutians.
The front moves into Western Alaska by Wed afternoon. A 997 mb North
Pacific low moves to 50N 179W at 987 mb Wed afternoon and continues 
to 55N 177W at 988 mb by Thu morning. Its associated front pushes 
into the Eastern Aleutians by Thu morning.

$$

PKZ411-140200-
Bering Sea Offshore West of 180 and East of the International
Dateline-
325 AM AKST Tue Feb 13 2018

.TODAY...SW wind 30 kt. Seas 19 to 22 ft. Snow showers.
.TONIGHT...SW wind 20 to 30 kt. Seas 16 to 22 ft.
.WED...S wind 10 to 25 kt. Seas 13 to 19 ft.
.WED NIGHT...NE wind 15 to 30 kt. Seas 9 to 14 ft.
.THU THROUGH SAT...SW wind 15 to 30 kt. Seas 11 to 19 ft.

$$

PKZ412-140200-
Bering Sea Offshore 171W to 180 and North of 56N-
325 AM AKST Tue Feb 13 2018

...GALE WARNING TODAY...

.TODAY...SW wind 25 to 35 kt. Seas 20 to 25 ft.
.TONIGHT...SW wind 20 to 30 kt. Seas 17 to 21 ft.
.WED...S wind 10 to 25 kt. Seas 11 to 18 ft.
.WED NIGHT...E wind 20 to 35 kt. Seas 11 to 18 ft.
.THU THROUGH SAT...S wind 20 to 35 kt. Seas 11 to 19 ft.

$$

PKZ413-140200-
Bering Sea Offshore 171W to 180 and South of 56N-
325 AM AKST Tue Feb 13 2018

...GALE WARNING TODAY...

.TODAY...SW wind 20 to 35 kt. Seas 15 to 23 ft.
.TONIGHT...SW wind 15 to 30 kt. Seas 13 to 20 ft.
.WED...S wind 10 to 20 kt becoming SE 15 to 30 kt in the
afternoon. Seas 10 to 16 ft.
.WED NIGHT...E wind 20 to 35 kt. Seas 10 to 17 ft.
.THU THROUGH FRI...S wind 25 to 40 kt. Seas 12 to 20 ft.
.SAT...S wind 10 to 20 kt. Seas 13 to 20 ft.

$$

PKZ414-140200-
Bering Sea Offshore East of 171W-
325 AM AKST Tue Feb 13 2018

...GALE WARNING TODAY...

.TODAY...S wind 30 to 45 kt becoming SW 20 to 35 kt in the
afternoon. Seas 13 to 21 ft. Rain and snow.
.TONIGHT...SW wind 15 to 30 kt diminishing to 10 to 20 kt after
midnight. Seas 13 to 17 ft. Rain.
.WED...S wind 10 to 20 kt. Seas 8 to 13 ft.
.WED NIGHT...E wind 15 to 30 kt. Seas 8 to 13 ft.
.THU THROUGH SAT...S wind 20 to 35 kt. Seas 11 to 19 ft.

$$

What forecasters said that day

The local office's own words before this gale warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Anchorage, AK wrote its last area forecast discussion before this gale warning went out at Feb 10, 4:50 AM AKST, 10 hours 53 minutes earlier.

Area forecast discussion, Feb 10, 4:50 AM AKST, 10 hours 53 minutes before
Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
450 AM AKST Sat Feb 10 2018

.ANALYSIS AND UPPER LEVELS...
A stacked low pressure system located just south of the eastern
Aleutians is slowly tracking north early this morning. The
associated occluded surface front is spreading rain from the
central Aleutians to the northern Bering. This front extends
eastward across the southern mainland to the central Gulf with
light rain and snow developing across the Southwest and light rain
over the Gulf. Winds along the frontal boundary tapered down
significantly overnight across the Bering with the strongest gusts
now mainly across the Southwest. Ahead of the front, a cold air
mass remains in place over the Copper River Basin with 33 below
reported in Glennallen this morning. Elsewhere across Southcentral,
temperatures have moderated slightly warmer than previous mornings
as cloud cover streams overhead and the trough edges further east.

&&

.MODEL DISCUSSION...
Models are generally in good agreement with the synoptic pattern
through the start of next week, however there is still some
uncertainty in how they handle the surface low that tracks into
the Bering today. The GFS and ECMWF track this feature slightly
faster north than the NAM, but the main details that bring
forecast uncertainty is how far north the warm air mass is pulled.
The GFS was mainly used to update the Southwest and Bering with a
combined model approach across Southcentral and the Gulf.

&&

.AVIATION...
PANC...VFR conditions are expected today with increasing cloud
cover through the evening as a front moves up from the Southwest.
MVFR ceilings were introduced after midnight as the boundary
moves up from the Kenai. Light snow is expected to develop along
this boundary; visibilities may need to be adjusted if the system
remains better organized than currently expected. Light winds
today increase out of the southeast Sunday morning with the
pressure gradient shifting in response to the surface low lifting
north.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2)...
A gale force front over the southwest Gulf will continue to slowly
weaken as it lifts northward today, with light precipitation
spreading to the Kenai Peninsula coastal areas and clouds moving
inland across the remainder of Southcentral. An approaching upper
level trough will split into two, with one short-wave shooting
eastward across the northeast Pacific (just south of the Gulf of
Alaska) and the other short-wave tracking northward across the
southern mainland of Alaska tonight through Sunday. This will
really serve to elongate and weaken the surface front as it
approaches the north Gulf coast tonight. The upper trough does
look a little stronger than previous guidance indicated, so have
upped the forecast to likely to categorical probability of snow
tonight for everywhere but the Copper River Basin. Vertical motion
will be weak, so generally expect an inch or less of snow.

There will be very little break between this system and the next,
with an amplifying pattern over the North Pacific leading
development of a strong southerly jet which will head right for
the Alaska Peninsula Sunday then curve northeastward into
Southcentral Alaska on Monday. This jet will ultimately steer
a weakening low northward to Southwest Alaska Sunday night.
However, isentropic lift will spread way out ahead of the low
center, with precipitation spreading northward across the western
Gulf Sunday afternoon and up to Southcentral Sunday evening. It
looks cold enough for precipitation to start as mostly snow across
Southcentral, with the exception of the Gulf coast, but much
warmer air will advect northward Sunday night into Monday, leading
to a transition to all rain for areas near the coast. Precipitation
intensity will begin to increase Sunday night as the upper jet
arrives and the upper trough and surface low make northward
progress.

A low track to the west of Southcentral often leads to downslope
winds and drying along the west side of mountain ranges. However,
in this case, the southeast flow will be fairly shallow, with
south to southwest flow through most of the atmosphere. In addition,
the dynamic lift and abundance of moisture with this system are
impressive. Thus, have forecasted high PoPs area-wide. Though the
southeast flow will not lead to complete drying in the lee of the
mountains, it will serve to cut down on precipitation amounts in
these areas.

&&

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

A highly progressive pattern is on tap for this forecast period. The
remnants of an occluded front will continue to push into
Southwest Alaska. Generally expecting rain along the coast with
the possibility of transitioning over to snow for interior
locations. As of 12z or 3 AM AKST, the radar at Bethel (PABC) has
showers from Russian Mission to Bethel and Eek. The models
continue to lift this moisture north-northeastward as the
attendant shortwave pushes through the area. All the while,
another low will be churning near the Central Aleutians and
rapidly move into Southwest. The leading edge of the
precipitation shield will be in Bristol Bay Sunday morning. This
second system looks to be even warmer. The way the models are
depicting the thickness values and the jet placement, it looks as
though the actual warm front, not just the occlusion will move
across the AKPEN. A few locations can expect a max temp of 40F or
better if the models stay on track. This will be a stratiform
event.

&&

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

A very active pattern is anticipated this forecast period. The
synoptic pattern features troughing from Kamchatka to the North
Pacific along with surface lows near the Central Aleutians and
southwest at 35N/175W. While one front is currently pushing away
from the area and into the Southwest Mainland today, the next
storm will rapidly follow in its wake. This second system will
have a strong jet driving it and will continue to monitor the wind
potential at the surface. Generally expecting the seas to swell.
There is a good sub-tropical moisture fetch associated with this
second system but the most notable sensible weather high light
might actually be the warm temperatures along the Chain. A third
system will rear its head near the end of this forecast period.
The models have been struggling to get in sync with the exact
track of the low but all of them are pinging into a mature cyclone
for the Western and Central Bering.

&&

.LONG TERM FORECAST (Days 3 through 7)...
A change to a warmer pattern remains in store for the beginning
of next week. On Monday, a low pressure system approaches the AK
Pen from the North Pacific and then moves into the eastern Bering
Sea. This system is accompanied by a lot of warm air, which makes
precipitation type a challenge for Monday's forecast. Models have
been somewhat inconsistent with the track of this low as well,
finally coming into some agreement with this morning's 18Z run.
Current forecast keeps a more southerly flow aloft, which
indicates a greater chance for precip reaching the lee side of the
mountains. This will also prevent a true snow-eater Chinook in
Southcentral, but some liquid precipitation is expected with
temperatures rising into the 30s at the surface.

On Tuesday and Wednesday, a short wave ridge will move through the
region, temporarily clearing skies first in the eastern Bering,
then over the mainland. This ridge is followed by a series of low
pressure systems that move into the central and western Bering.
Models forecasts have been very inconsistent on these next
systems, so there is little confidence in specific storm tracks
and timing past Wednesday. Overall though, an active pattern
looks to persist over the Bering and Western AK while high
pressure builds over Southcentral leading to quieter weather by
the middle of next week.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Gales 120 130 131 139 155 178.

&&

SYNOPSIS AND MODEL DISCUSSION...KH
SOUTHCENTRAL ALASKA...SEB
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...PJS
LONG TERM...LF

The office that day

Everything else NWS Anchorage, AK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 10, 3:47 PM AKSTGale WarningAFC12 hr
Feb 10, 3:47 PM AKSTSmall Craft AdvisoryAFC36 hr
Feb 10, 3:55 PM AKSTSmall Craft AdvisoryAFC71 hr
Feb 10, 4:03 PM AKSTWinter Weather AdvisoryAFC53 hr
Feb 11, 3:00 AM AKSTGale WarningAFC60 hr
Feb 11, 3:26 AM AKSTGale WarningAFC7 days
Feb 11, 3:31 AM AKSTGale WarningAFC60 hr
Feb 11, 3:31 AM AKSTStorm WarningAFC48 hr
Feb 11, 3:36 AM AKSTGale WarningAFC59 hr
Feb 11, 3:36 AM AKSTSmall Craft AdvisoryAFC24 hr

Nearby

Gale Warnings in Alaska, 2018Every gale warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.