Gale Warning 124, NWS Anchorage, AK

124 
FZAK62 PAFC 220012
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
312 PM AKST Wed Feb 21 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.

PKZ499-221400-
312 PM AKST Wed Feb 21 2018
.SYNOPSIS FOR CENTRAL BERING SEA...
A 997 mb low at 64N 176W moves 
inland near 68N 164W at 1000 mb with its front pushing into Western 
Alaska by Midday Thu. A 1006 mb low near 52N 177E Thu afternoon will 
move to 60N 178W at 993 mb Fri afternoon. The associated front will 
move across the Bering Sea Thu night and Fri.

$$

PKZ411-221400-
Bering Sea Offshore West of 180 and East of the International
Dateline-
312 PM AKST Wed Feb 21 2018

...GALE WARNING THURSDAY AND THURSDAY NIGHT...

.TONIGHT...S wind 10 to 25 kt. Seas 7 to 11 ft.
.THU...SE wind 20 to 35 kt. Seas 8 to 13 ft. Snow and rain.
.THU NIGHT...S wind 20 to 35 kt. Seas 11 to 16 ft. Snow with rain.
.FRI...SW wind 20 to 30 kt. Seas 14 to 22 ft.
.FRI NIGHT...W wind 30 kt. Seas 20 to 24 ft.
.SAT...SW wind 15 to 30 kt. Seas 10 to 18 ft.
.SUN...S wind up to 15 kt. Seas 15 to 23 ft.
.MON...W wind 15 to 25 kt. Seas 13 to 21 ft.

$$

PKZ412-221400-
Bering Sea Offshore 171W to 180 and North of 56N-
312 PM AKST Wed Feb 21 2018

...GALE WARNING THURSDAY NIGHT...

.TONIGHT...W wind 15 to 30 kt. Seas 9 to 16 ft.
.THU...W wind up to 20 kt becoming SE 10 to 25 kt in the
afternoon. Seas 7 to 12 ft.
.THU NIGHT...E wind 25 to 40 kt. Seas 9 to 14 ft. Snow and rain.
.FRI...SW wind 25 to 40 kt. Seas 11 to 18 ft.
.FRI NIGHT...W wind 25 to 35 kt. Seas 15 to 22 ft.
.SAT...W wind 20 to 35 kt. Seas 13 to 21 ft.
.SUN...S wind 15 to 25 kt. Seas 14 to 22 ft.
.MON...SW wind 25 kt. Seas 17 to 26 ft.

$$

PKZ413-221400-
Bering Sea Offshore 171W to 180 and South of 56N-
312 PM AKST Wed Feb 21 2018

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...W wind 20 to 35 kt diminishing to up to 20 kt after
midnight. Seas 9 to 17 ft.
.THU...SE wind 10 to 25 kt increasing to 20 to 35 kt in the
afternoon. Seas 7 to 10 ft.
.THU NIGHT...S wind 20 to 35 kt. Seas 9 to 14 ft. Rain.
.FRI...W wind 20 to 30 kt. Seas 10 to 18 ft.
.FRI NIGHT...W wind 35 kt. Seas 15 to 23 ft.
.SAT...SW wind 20 to 35 kt. Seas 12 to 20 ft.
.SUN...S wind 20 to 30 kt. Seas 14 to 22 ft.
.MON...SW wind 20 to 30 kt. Seas 13 to 21 ft.

$$

PKZ414-221400-
Bering Sea Offshore East of 171W-
312 PM AKST Wed Feb 21 2018

...GALE WARNING TONIGHT...

.TONIGHT...W wind 20 to 35 kt. Seas 9 to 16 ft.
.THU...W wind 15 to 30 kt diminishing to up to 15 kt in the
afternoon. Seas 8 to 13 ft.
.THU NIGHT...SE wind 15 to 30 kt. Seas 6 to 11 ft. Rain.
.FRI...S wind 20 to 35 kt. Seas 7 to 12 ft.
.FRI NIGHT...W wind 20 to 35 kt. Seas 11 to 19 ft.
.SAT...W wind 25 to 35 kt. Seas 14 to 22 ft.
.SUN THROUGH MON...SW wind 15 to 30 kt. Seas 11 to 19 ft.

$$

512 
FZAK62 PAFC 221254
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
354 AM AKST Thu Feb 22 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.

PKZ499-230145-
354 AM AKST Thu Feb 22 2018
.SYNOPSIS FOR CENTRAL BERING SEA...

A 1005 mb low at 49N 173E moves to 58N 177E at 996 mb by Fri
morning and then to 58N 173E at 1000 mb by Sat morning. A 1000 mb
low Fri afternoon at 60N 174W moves inland near 61N 165W by Sat
morning. The associated front will move across the Bering Sea 
through Fri afternoon.


$$

PKZ411-230145-
Bering Sea Offshore West of 180 and East of the International
Dateline-
354 AM AKST Thu Feb 22 2018

...GALE WARNING THROUGH FRIDAY...

.TODAY...SE wind 20 to 35 kt. Seas 8 to 13 ft. Snow and rain.
.TONIGHT...S wind 25 to 35 kt. S of 56N...W wind 25 kt. Seas 11 to 
16 ft. Snow and rain.
.FRI...W wind 20 to 35 kt. Seas 14 to 20 ft.
.FRI NIGHT...W wind 25 to 40 kt. Seas 19 to 23 ft.
.SAT THROUGH MON...SW wind 25 to 40 kt. Seas 11 to 19 ft.

$$

PKZ412-230145-
Bering Sea Offshore 171W to 180 and North of 56N-
354 AM AKST Thu Feb 22 2018

...GALE WARNING TONIGHT AND FRIDAY...

.TODAY...W wind up to 20 kt becoming SE 10 to 25 kt in the
afternoon. Seas 6 to 11 ft.
.TONIGHT...E wind 25 to 40 kt. Seas 9 to 14 ft. Snow and rain.
.FRI...SW wind 25 to 40 kt. Seas 11 to 18 ft. Rain.
.FRI NIGHT...W wind 30 to 45 kt. Seas 16 to 21 ft.
.SAT...SW wind 20 to 35 kt. Seas 13 to 21 ft.
.SUN...S wind 20 to 35 kt. Seas 10 to 18 ft.
.MON...SW wind 25 to 40 kt. Seas 13 to 28 ft.

$$

PKZ413-230145-
Bering Sea Offshore 171W to 180 and South of 56N-
354 AM AKST Thu Feb 22 2018

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE wind 10 to 25 kt increasing to 20 to 35 kt in the
afternoon. Seas 6 to 11 ft. Rain.
.TONIGHT...SE wind 20 to 35 kt becoming W 20 to 30 kt after 
midnight. Seas 9 to 14 ft. Rain.
.FRI...W wind 20 to 30 kt. Seas 10 to 18 ft.
.FRI NIGHT...W wind 30 to 40 kt. Seas 16 to 21 ft.
.SAT THROUGH MON...SW wind 25 to 40 kt. Seas 15 to 23 ft.

$$

PKZ414-230145-
Bering Sea Offshore East of 171W-
354 AM AKST Thu Feb 22 2018

...GALE WARNING TONIGHT AND FRIDAY...

.TODAY...W wind 15 to 30 kt diminishing to up to 15 kt in the
afternoon. Seas 7 to 11 ft.
.TONIGHT...SE wind 20 to 35 kt. Seas 7 to 12 ft. Snow and rain.
.FRI...SE wind 20 to 35 kt. Seas 8 to 13 ft.
.FRI NIGHT...W wind 25 to 35 kt. Seas 11 to 19 ft.
.SAT...W wind 20 to 35 kt. Seas 13 to 21 ft.
.SUN...S wind 20 to 35 kt. Seas 8 to 16 ft.
.MON...SW wind 20 to 35 kt. Seas 16 to 27 ft.

$$

849 
FZAK62 PAFC 230032
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
332 PM AKST Thu Feb 22 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.

PKZ499-231415-
332 PM AKST Thu Feb 22 2018
.SYNOPSIS FOR CENTRAL BERING SEA...

A 1002 mb low at 52N 176E this afternoon will move to 60N 177W 
and strengthen to 996 mb Fri afternoon while sending a front 
eastward through the Bering and Aleutians. This low moves out of 
the area on Sunday. A 994 mb low develops at 52N 171E Saturday 
afternoon.

$$

PKZ411-231415-
Bering Sea Offshore West of 180 and East of the International
Dateline-
332 PM AKST Thu Feb 22 2018

...GALE WARNING THROUGH FRIDAY NIGHT...

.TONIGHT...SE wind 20 to 35 kt becoming SW after midnight. Seas
11 to 17 ft. Snow and rain.
.FRI...SW wind 25 to 35 kt. Seas 15 to 21 ft.
.FRI NIGHT...SW wind 25 to 35 kt. Seas 18 to 22 ft.
.SAT...SW wind 15 to 30 kt. Seas 12 to 20 ft.
.SAT NIGHT...SE wind 25 to 40 kt. Seas 8 to 16 ft.
.SUN THROUGH MON...SW wind 25 to 40 kt. Seas 12 to 20 ft.
.TUE...SW wind 10 to 25 kt. Seas 9 to 14 ft.

$$

PKZ412-231415-
Bering Sea Offshore 171W to 180 and North of 56N-
332 PM AKST Thu Feb 22 2018

...GALE WARNING THROUGH FRIDAY NIGHT...

.TONIGHT...E wind 25 to 40 kt. Seas 9 to 14 ft. Snow and rain.
.FRI...SW wind 25 to 40 kt. Seas 12 to 19 ft. Snow and rain showers.
.FRI NIGHT...W wind 25 to 40 kt. Seas 16 to 21 ft.
.SAT...W wind 20 to 35 kt. Seas 17 to 22 ft.
.SAT NIGHT...S wind 25 to 40 kt. Seas 11 to 18 ft.
.SUN...S wind 25 to 40 kt. Seas 13 to 21 ft.
.MON THROUGH TUE...SW wind 25 to 40 kt. Seas 13 to 28 ft.

$$

PKZ413-231415-
Bering Sea Offshore 171W to 180 and South of 56N-
332 PM AKST Thu Feb 22 2018

...GALE WARNING TONIGHT AND FRIDAY NIGHT...

.TONIGHT...SE wind 25 to 40 kt becoming SW 20 to 30 kt after
midnight. Seas 9 to 14 ft. Rain and snow.
.FRI...W wind 30 kt. Seas 12 to 18 ft.
.FRI NIGHT...W wind 30 to 40 kt. Seas 16 to 24 ft. Snow showers.
.SAT...SW wind 20 to 35 kt. Seas 15 to 23 ft.
.SAT NIGHT...S wind 20 to 35 kt. Seas 10 to 16 ft.
.SUN...SW wind 35 to 50 kt. Seas 15 to 30 ft.
.MON THROUGH TUE...SW wind 20 to 35 kt. Seas 15 to 23 ft.

$$

PKZ414-231415-
Bering Sea Offshore East of 171W-
332 PM AKST Thu Feb 22 2018

...GALE WARNING THROUGH FRIDAY NIGHT...

.TONIGHT...SE wind 20 to 35 kt. Seas 7 to 12 ft. Snow and rain.
.FRI...S wind 20 to 35 kt becoming SW in the afternoon. Seas 8 to
13 ft. Snow with rain.
.FRI NIGHT...W wind 30 to 40 kt. Seas 11 to 19 ft.
.SAT...W wind 25 to 40 kt. Seas 15 to 22 ft.
.SAT NIGHT...W wind 20 to 35 kt. Seas 11 to 19 ft.
.SUN...S wind 25 to 40 kt. Seas 11 to 19 ft.
.MON...SW wind 20 to 35 kt. Seas 16 to 27 ft.
.TUE...SW wind 15 to 30 kt. Seas 12 to 20 ft.

$$

056 
FZAK62 PAFC 231251
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
351 AM AKST Fri Feb 23 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.

PKZ499-240245-
351 AM AKST Fri Feb 23 2018
.SYNOPSIS FOR CENTRAL BERING SEA...

A 994 mb low at 57N 177E moves to 57N 170E at 1001 mb by Sat
morning and then to 57N 165E by Sat night. A 1002 mb low at 60N
175W Sat morning moves inland near 60N 165W by Sat night. A 983 mb
low Sat afternoon at 47N 170E moves to 53N 178E at 982 mb by Sun
morning.

$$

PKZ411-240245-
Bering Sea Offshore West of 180 and East of the International
Dateline-
351 AM AKST Fri Feb 23 2018

...GALE WARNING THROUGH TONIGHT...

.TODAY...E to SW wind 30 to 40 kt. Seas 15 to 22 ft.
.TONIGHT...SW wind 25 to 40 kt. Seas 18 to 24 ft.
.SAT...S wind 15 to 30 kt. Seas 12 to 20 ft.
.SAT NIGHT...E wind 25 to 40 kt. Seas 10 to 16 ft.
.SUN THROUGH MON...W wind 25 to 40 kt. Seas 10 to 18 ft.
.TUE...S wind 20 to 35 kt. Seas 6 to 10 ft.

$$

PKZ412-240245-
Bering Sea Offshore 171W to 180 and North of 56N-
351 AM AKST Fri Feb 23 2018

...GALE WARNING THROUGH SATURDAY...

.TODAY...E to SW wind 25 to 40 kt. Seas 13 to 20 ft.
.TONIGHT...W wind 40 kt. Seas 18 to 24 ft.
.SAT...W wind 25 to 40 kt diminishing to 15 to 30 kt in the
afternoon. Seas 16 to 24 ft.
.SAT NIGHT...SE wind 25 to 40 kt. Seas 11 to 17 ft.
.SUN THROUGH MON...W wind 20 to 35 kt. Seas 12 to 20 ft.
.TUE...W wind 15 to 30 kt. Seas 7 to 10 ft.

$$

PKZ413-240245-
Bering Sea Offshore 171W to 180 and South of 56N-
351 AM AKST Fri Feb 23 2018

...GALE WARNING THROUGH SATURDAY...

.TODAY...W wind 35 kt. Seas 12 to 19 ft.
.TONIGHT...W wind 30 to 40 kt. Seas 18 to 23 ft.
.SAT...W wind 20 to 35 kt becoming SW 10 to 25 kt in the
afternoon. Seas 14 to 22 ft.
.SAT NIGHT...SE wind 25 to 40 kt. Seas 11 to 15 ft.
.SUN THROUGH MON...W wind 30 to 45 kt. Seas 14 to 29 ft.
.TUE...SW wind 15 to 30 kt. Seas 8 to 12 ft.

$$

PKZ414-240245-
Bering Sea Offshore East of 171W-
351 AM AKST Fri Feb 23 2018

...GALE WARNING THROUGH SATURDAY...

.TODAY...SE wind 30 to 45 kt early becoming SW wind 20 to 35 kt. 
Seas 9 to 14 ft. Snow.
.TONIGHT...W wind 30 to 40 kt. Seas 13 to 21 ft.
.SAT...W wind 25 to 40 kt. Seas 17 to 23 ft.
.SAT NIGHT...SW wind 15 to 30 kt. Seas 10 to 18 ft.
.SUN THROUGH MON...SW wind 25 to 40 kt. Seas 15 to 30 ft.
.TUE...W wind 20 to 30 kt. Seas 8 to 11 ft.

$$

435 
FZAK62 PAFC 240015
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
315 PM AKST Fri Feb 23 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.

PKZ499-241430-
315 PM AKST Fri Feb 23 2018
.SYNOPSIS FOR CENTRAL BERING SEA...
A 992 mb North Pacific low will move to 47N 169E Sat morning then
it will move to 58N 175W at 982 mb Sun afternoon. 

$$

PKZ411-241430-
Bering Sea Offshore West of 180 and East of the International
Dateline-
315 PM AKST Fri Feb 23 2018

...GALE WARNING TONIGHT AND SATURDAY NIGHT...

.TONIGHT...SW wind 40 kt diminishing to 25 to 35 kt after midnight. 
Seas 18 to 26 ft.
.SAT...S wind 15 to 30 kt. Seas 13 to 21 ft. Snow.
.SAT NIGHT...E wind 25 to 40 kt. Seas 10 to 15 ft. Snow and rain.
.SUN...N wind 25 to 40 kt. Seas 14 to 22 ft.
.SUN NIGHT...W wind 15 to 30 kt. Seas 12 to 20 ft.
.MON...SW wind 15 to 30 kt. Seas 9 to 14 ft.
.TUE THROUGH WED...S wind 25 to 40 kt. Seas 9 to 14 ft.

$$

PKZ412-241430-
Bering Sea Offshore 171W to 180 and North of 56N-
315 PM AKST Fri Feb 23 2018

...GALE WARNING THROUGH SATURDAY NIGHT...

.TONIGHT...W wind 30 to 40 kt. Seas 18 to 28 ft.
.SAT...W wind 30 to 40 kt diminishing to 15 to 30 kt in the
afternoon. Seas 23 to 28 ft subsiding to 17 to 25 ft in the
afternoon.
.SAT NIGHT...S wind 10 to 25 kt becoming SE 20 to 35 kt after
midnight. Seas 11 to 19 ft subsiding to 10 to 13 ft after
midnight. Snow.
.SUN...SE wind 20 to 35 kt. Seas 11 to 18 ft.
.SUN NIGHT...NW wind 25 to 40 kt. Seas 14 to 22 ft.
.MON...W wind 15 to 30 kt. Seas 11 to 19 ft.
.TUE...W wind 15 to 30 kt. Seas 7 to 10 ft.
.WED...S wind 20 to 30 kt. Seas 9 to 14 ft.

$$

PKZ413-241430-
Bering Sea Offshore 171W to 180 and South of 56N-
315 PM AKST Fri Feb 23 2018

...GALE WARNING TONIGHT AND SATURDAY NIGHT...

.TONIGHT...W wind 30 to 40 kt. Seas 17 to 24 ft.
.SAT...SW wind 15 to 30 kt. Seas 14 to 22 ft.
.SAT NIGHT...SE wind 25 to 40 kt. Seas 12 to 15 ft. Snow with
rain.
.SUN...SW wind 35 to 50 kt. Seas 17 to 32 ft.
.SUN NIGHT...W wind 35 to 50 kt. Seas 18 to 33 ft.
.MON...SW wind 15 to 30 kt. Seas 13 to 21 ft.
.TUE THROUGH WED...S wind 20 to 35 kt. Seas 8 to 16 ft.

$$

PKZ414-241430-
Bering Sea Offshore East of 171W-
315 PM AKST Fri Feb 23 2018

...GALE WARNING THROUGH SATURDAY...

.TONIGHT...W wind 35 kt. Seas 13 to 21 ft.
.SAT...W wind 30 to 40 kt diminishing to 20 to 35 kt in the
afternoon. Seas 17 to 22 ft.
.SAT NIGHT...W wind 10 to 25 kt becoming S 15 to 30 kt after
midnight. Seas 10 to 18 ft. Snow.
.SUN...S wind 30 to 45 kt. Seas 13 to 21 ft.
.SUN NIGHT...SW wind 35 to 50 kt. Seas 18 to 33 ft.
.MON...W wind 25 to 40 kt. Seas 13 to 28 ft.
.TUE...W wind 20 to 30 kt. Seas 8 to 11 ft.
.WED...S wind 10 to 25 kt. Seas 7 ft.

$$

876 
FZAK62 PAFC 241308
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
408 AM AKST Sat Feb 24 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.

PKZ499-250145-
408 AM AKST Sat Feb 24 2018
.SYNOPSIS FOR CENTRAL BERING SEA...

A 1002 mb low at 58N 177W will move inland near 60N 165W at 1014
mb by Sat night. A 992 mb low at 47N 169E will move to 55N 176E at
984 mb by Sun morning and then move inland near 61N 162W at 983 mb
by Mon morning. A 1002 mb low Sun morning at 46N 164E will move to
51N 173E at 1007 mb by Mon morning.

$$

PKZ411-250145-
Bering Sea Offshore West of 180 and East of the International
Dateline-
408 AM AKST Sat Feb 24 2018

...GALE WARNING TONIGHT AND SUNDAY...

.TODAY...W wind 15 to 30 kt becoming S in the afternoon. Seas 11 to 
19 ft. Snow.
.TONIGHT...E wind 25 to 40 kt. Seas 10 to 16 ft. Snow with rain.
.SUN...North of 56N... NE wind 25 to 40 kt. South of 56N... NW to SW
wind 30 to 45 kt. Seas 14 to 22 ft. Snow with rain.
.SUN NIGHT...NW wind 20 to 35 kt. Seas 13 to 21 ft.
.MON THROUGH TUE...S wind 20 to 35 kt. Seas 8 to 13 ft.
.WED...SE wind 30 to 40 kt. Seas 16 to 29 ft.

$$

PKZ412-250145-
Bering Sea Offshore 171W to 180 and North of 56N-
408 AM AKST Sat Feb 24 2018

...GALE WARNING THROUGH SUNDAY...

.TODAY...W wind 25 to 40 kt. Seas 16 to 28 ft.
.TONIGHT...S wind 10 to 25 kt becoming E 25 to 40 kt after
midnight. Seas 10 to 16 ft. Snow.
.SUN...S wind 20 to 35 kt. Seas 12 ft building to 11 to 19 ft in
the afternoon. Snow and rain.
.SUN NIGHT...NW wind 20 to 35 kt. Seas 13 to 27 ft.
.MON THROUGH TUE...W wind 20 to 35 kt. Seas 9 to 17 ft.
.WED...SE wind 20 to 35 kt. Seas 12 to 20 ft.

$$

PKZ413-250145-
Bering Sea Offshore 171W to 180 and South of 56N-
408 AM AKST Sat Feb 24 2018

...STORM WARNING SUNDAY...

.TODAY...SW wind 20 to 35 kt becoming S 10 to 25 kt in the
afternoon. Seas 13 to 21 ft.
.TONIGHT...SE wind 25 to 40 kt becoming S after midnight. Seas 11
to 15 ft. Snow with rain.
.SUN...SW wind 35 to 50 kt. Seas 14 to 22 ft building to 18 to 33
ft in the afternoon. Rain.
.SUN NIGHT...W wind 35 to 50 kt. Seas 19 to 34 ft.
.MON THROUGH TUE...SW wind 15 to 30 kt. Seas 11 to 19 ft.
.WED...S wind 25 to 35 kt. Seas 11 to 19 ft.

$$

PKZ414-250145-
Bering Sea Offshore East of 171W-
408 AM AKST Sat Feb 24 2018

...GALE WARNING TODAY AND SUNDAY...

.TODAY...W wind 30 to 40 kt diminishing to 20 to 35 kt in the
afternoon. Seas 17 to 23 ft.
.TONIGHT...W wind 15 to 30 kt becoming SE after midnight. Seas 11
to 19 ft. Snow.
.SUN...SE wind 20 to 35 kt becoming SW 30 to 45 kt in the
afternoon. Seas 11 to 19 ft. Snow with rain.
.SUN NIGHT...SW wind 35 to 50 kt. Seas 18 to 33 ft.
.MON...W wind 30 to 45 kt. Seas 14 to 29 ft.
.TUE...W wind 15 to 30 kt. Seas 9 to 15 ft.
.WED...SE wind 15 to 30 kt. Seas 5 to 10 ft.

$$

744 
FZAK62 PAFC 250036
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
336 PM AKST Sat Feb 24 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.

PKZ499-251415-
336 PM AKST Sat Feb 24 2018
.SYNOPSIS FOR CENTRAL BERING SEA...

A 988 mb low at 50N 170E will move to 57N 178W at 983 mb Sun 
afternoon. It will then move inland near Bethel early Mon morning
at 980 mb.

$$

PKZ411-251415-
Bering Sea Offshore West of 180 and East of the International
Dateline-
336 PM AKST Sat Feb 24 2018

...GALE WARNING THROUGH SUNDAY NIGHT...

.TONIGHT...E wind 25 to 40 kt. Seas 10 to 18 ft. Rain and snow.
.SUN...NW wind 30 to 45 kt. Seas 13 to 27 ft. Rain and snow.
.SUN NIGHT...NW wind 20 to 35 kt becoming W up to 20 kt after
midnight. Seas 14 to 22 ft. Patchy fog.
.MON...SE wind up to 20 kt. Seas 9 to 14 ft.
.MON NIGHT...W wind 10 to 20 kt. Seas 7 to 12 ft.
.TUE...S wind 35 to 50 kt. Seas 11 to 19 ft.
.WED...SE wind 30 to 40 kt. Seas 21 to 35 ft.
.THU...SW wind 20 to 30 kt. Seas 16 to 24 ft.

$$

PKZ412-251415-
Bering Sea Offshore 171W to 180 and North of 56N-
336 PM AKST Sat Feb 24 2018

...GALE WARNING THROUGH SUNDAY NIGHT...

.TONIGHT...SE wind 10 to 25 kt becoming E 20 to 35 kt after
midnight. Seas 10 to 17 ft. Rain and snow.
.SUN...E wind 20 to 35 kt becoming SW. Seas 11 to 19 ft. Rain and 
snow.
.SUN NIGHT...NW wind 20 to 35 kt. Seas 14 to 29 ft. Rain.
.MON...W wind 10 to 25 kt. Seas 12 to 20 ft.
.MON NIGHT...W wind 10 to 20 kt. Seas 7 to 12 ft.
.TUE...SW wind 15 to 30 kt. Seas 6 to 10 ft.
.WED...SE wind 20 to 35 kt. Seas 14 to 22 ft.
.THU...S wind 15 to 30 kt. Seas 13 to 21 ft.

$$

PKZ413-251415-
Bering Sea Offshore 171W to 180 and South of 56N-
336 PM AKST Sat Feb 24 2018

...STORM WARNING SUNDAY AND SUNDAY NIGHT...

.TONIGHT...SE wind 20 to 35 kt. Seas 11 to 14 ft. Rain and snow.
.SUN...SW wind 30 to 45 kt increasing to 40 to 55 kt with gusts to 70
kt in the afternoon. Seas 13 to 21 ft building to 18 to 33 ft in the
afternoon. Rain and snow showers.
.SUN NIGHT...W wind 40 to 55 kt diminishing to 30 to 45 kt after
midnight. Seas 27 to 37 ft subsiding to 19 to 34 ft after
midnight. Patchy fog developing after midnight.
.MON...SW wind 15 to 30 kt. Seas 14 to 22 ft.
.MON NIGHT...W wind 15 to 30 kt. Seas 10 to 14 ft.
.TUE...SW wind 30 to 45 kt. Seas 9 to 14 ft.
.WED...S wind 25 to 35 kt. Seas 14 to 21 ft.
.THU...SW wind 25 kt. Seas 11 to 16 ft.

$$

PKZ414-251415-
Bering Sea Offshore East of 171W-
336 PM AKST Sat Feb 24 2018

...STORM WARNING SUNDAY NIGHT...

.TONIGHT...W wind 15 to 30 kt becoming SE. Seas 10 to 18 ft. Snow 
and rain.
.SUN...SE wind 20 to 35 kt becoming SW 30 to 45 kt in the
afternoon. Seas 8 to 12 ft building to 11 to 19 ft in the afternoon.
Rain and snow.
.SUN NIGHT...W wind 35 to 50 kt. Seas 15 to 30 ft building to 22
to 37 ft after midnight. Rain.
.MON...W wind 25 to 40 kt. Seas 17 to 32 ft.
.MON NIGHT...W wind 15 to 30 kt. Seas 9 to 17 ft.
.TUE...W wind 10 to 25 kt. Seas 6 to 11 ft.
.WED THROUGH THU...S wind 15 to 30 kt. Seas 7 to 12 ft.

$$

760 
FZAK62 PAFC 251238
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
338 AM AKST Sun Feb 25 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.

PKZ499-260200-
338 AM AKST Sun Feb 25 2018
.SYNOPSIS FOR CENTRAL BERING SEA...

A 983 mb low near 55N 175E will move inland over the Y-K Delta at
981 mb late Sun night. An associated front over the eastern Bering
will move inland over southwest AK by Sun evening. A weak trough
of low pressure will move over the western Aleutians Mon morning
and move east across the Bering through Tue morning.

$$

PKZ411-260200-
Bering Sea Offshore West of 180 and East of the International
Dateline-
338 AM AKST Sun Feb 25 2018

...STORM WARNING TODAY...

.TODAY...N of 56N... NE wind 25 to 40 kt. S of 56N... NW wind 35 to 
50 kt. Seas 14 to 29 ft. Rain and snow.
.TONIGHT...NW wind 25 to 40 kt diminishing to 10 to 20 kt after 
midnight. Seas 15 to 23 ft.
.MON...E wind 10 to 15 kt. Seas 8 to 13 ft.
.MON NIGHT...W wind up to 20 kt. Seas 7 to 12 ft.
.TUE...SE wind 30 to 45 kt. Seas 14 to 22 ft.
.WED...S wind 30 to 45 kt. Seas 19 to 34 ft.
.THU...SW wind 20 to 30 kt. Seas 13 to 20 ft.

$$

PKZ412-260200-
Bering Sea Offshore 171W to 180 and North of 56N-
338 AM AKST Sun Feb 25 2018

...GALE WARNING THROUGH TONIGHT...

.TODAY...S wind 25 to 40 kt. Seas 12 ft building to 14 to 22 ft in
the afternoon. Rain and snow.
.TONIGHT...NW wind 30 to 45 kt. Seas 16 to 31 ft. Rain.
.MON...W wind 10 to 25 kt diminishing to up to 15 kt in the
afternoon. Seas 12 to 20 ft.
.MON NIGHT...W wind 10 to 25 kt. Seas 7 to 11 ft.
.TUE...SW wind 25 to 40 kt. Seas 8 to 16 ft.
.WED...SE wind 25 to 40 kt. Seas 12 to 20 ft.
.THU...SW wind 15 to 25 kt. Seas 13 to 19 ft.

$$

PKZ413-260200-
Bering Sea Offshore 171W to 180 and South of 56N-
338 AM AKST Sun Feb 25 2018

...STORM WARNING THROUGH TONIGHT...

.TODAY...SW wind 40 to 55 kt. Seas 15 to 23 ft building to 20 to
35 ft in the afternoon. Rain and snow showers.
.TONIGHT...W wind 40 to 55 kt. Seas 22 to 37 ft.
.MON...SW wind 15 to 30 kt. Seas 13 to 21 ft. Rain and snow.
.MON NIGHT...W wind 15 to 30 kt. Seas 9 to 14 ft.
.TUE THROUGH WED...S wind 30 to 45 kt. Seas 10 to 18 ft.
.THU...SW wind 15 to 25 kt. Seas 12 to 17 ft.

$$

PKZ414-260200-
Bering Sea Offshore East of 171W-
338 AM AKST Sun Feb 25 2018

...STORM WARNING TONIGHT...

.TODAY...SE wind 20 to 35 kt becoming SW 30 to 45 kt in the
afternoon. Seas 9 to 12 ft building to 11 to 19 ft in the
afternoon. Rain and snow.
.TONIGHT...SW wind 35 to 50 kt. Seas 16 to 31 ft building to 23 to
38 ft after midnight. Rain.
.MON...W wind 30 to 45 kt diminishing to 15 to 30 kt in the
afternoon. Seas 20 to 34 ft subsiding to 15 to 23 ft in the
afternoon.
.MON NIGHT...W wind 15 to 30 kt. Seas 9 to 15 ft.
.TUE...W wind 15 to 30 kt. Seas 7 to 11 ft.
.WED...SE wind 15 to 30 kt. Seas 7 to 12 ft.
.THU...SW wind 10 to 25 kt. Seas 7 to 12 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
442 PM AKST Tue Feb 20 2018

.ANALYSIS AND UPPER LEVELS...

A look at the weather map shows a low pressure system moving near
the Bering Strait and into the Arctic Ocean. An associated
weather front extends southeastward from the low and has plowed
across virtually all of mainland Alaska in the last 24 hours.
While this storm has brought major impacts to the interior
portions of the state, our forecast area has had much lighter
impacts. In fact, as the front went through this morning, it
couldn't even produce enough vertical mixing in the atmosphere to
churn up and get rid of the low clouds and fog stuck around upper
Cook Inlet and parts of the Bristol Bay zone and Upper Kuskokwim
Valley. With the leftovers of the front now moving away from us.
Low clouds and fog are likely to persist tonight as warm
advection overspreads the area once again from the southwest.

Over the Bering Sea and Aleutians, thick clouds and widespread
precip has already moved into the western 2/3 of the area as the
next low center is just about to cross over the western Aleutians
and into the Bering Sea. This storm will follow a similar track to
the last one and track northeastward toward the Bering Strait.

&&

.MODEL DISCUSSION...

The available models are in reasonably good agreement on the
overall path of the next storm through our AOR (the storm
currently moving into the western Aleutians). All solutions depict
a large and deep pocket of warm air moving into Southwest and then
Southcentral Alaska in the next 12-36 hours. As this warm sector
continues off to the east on Wednesday night/Thursday, a cold
front will surge eastward through Southwest and then Southcentral
Alaska. This cold front is the focus of most of our effort today,
and represents the forecast challenge of the day. The problem is
not with the surface features as much as the upper level
trough/dynamics associated with the storm. As the supporting upper
trough passes through southern Alaska, there is disagreement on
the overall orientation of the feature. The NAM/GFS bring the
trough through with a neutral or even slightly positive tilt,
which would push the whole thing through fairly quickly and with
fairly minor amounts of precipitation in most areas. Meanwhile,
the Canadian and European models have tried to go neutral and then
even negatively tilted with the trough. This would result in much
heavier and more widespread precipitation across Southcentral on
Thursday morning than the NAM/GFS models. Forecast experience and
pattern recognition would support the NAM/GFS solutions, so that
is what the forecast is largely based on today, and some movement
toward this solution was noted in the 12z GEM/Canadian model run
this morning.

&&

.AVIATION...
PANC...IFR cig/vis will likely persist as warm air moving up Cook
Inlet tonight helps strengthen the temperature inversion.
Therefore the low clouds and/or fog will continue through the
Wednesday morning period with increasing mid level clouds
improving the situation by afternoon.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2)...
Areas of low stratus and fog will linger across portions of
Southcentral and particularly the Cook Inlet region through
Wednesday morning as weak outflow winds quickly diminish and
upper level ridging is re-established over the mainland. This
will yield generally quiet conditions Wednesday into Wednesday
night before the next trough approaches from the west. This
feature will bring another round of winter precipitation to much
of the area early Thursday morning into Thursday afternoon,
although many of the details are still uncertain. A favorable
southwest flow pattern aloft yields the greatest forecast
confidence from Hatcher Pass into the northern Susitna Valley,
with a quick 6-12 inches possible in Hatcher Pass by Thursday
morning. Accumulations are expected to be more limited over the
Susitna Valley as the system looks to move through pretty quickly
given the progressive nature of the synoptic pattern. The
situation is a bit more muddled for Anchorage, as the presence of
southeasterly winds at the surface and temperatures hovering near
freezing will introduce precipitation type concerns. This lends
lower confidence to the forecast, with a rain/snow mix possibly
helping to limit accumulations to around one inch or less within
the Bowl. The trough will then swing east to Prince William Sound
and the Copper River Basin by Thursday afternoon, bringing snow to
these locations before departing to the east Thursday evening and
paving the way for another round of outflow winds to begin the mid
term part of the forecast.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2)...
Light southerly flow along with low stratus and fog will persist
over much of the southwestern Mainland this evening through
Wednesday morning. A weak upper level wave tonight will preface a
larger wave moving into the southwest Mainland Wednesday evening,
both of which will bring some precipitation and gusty onshore
winds to the area tonight through Thursday night. Precipitation
will likely start off as a mixture of snow and rain across the
southern mainland tonight, transitioning to mostly rain overnight
tonight into tomorrow morning. Snow will begin mixing back in with
rain through the remainder of the day Wednesday, and eventually
transition back to predominantly snow by Thursday morning as
colder air aloft begins to filter back into the area from the
west.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2)...
A stacked gale force low over the western Aleutians will slowly
track northward tonight. The associated front will continue to
track northeastward from the central Aleutians/Bering through the
eastern Aleutians/Bering tonight through Wednesday morning.
This system will not be nearly as strong as the previous, but it
will last longer since it is slower moving, so expect gale force
winds over parts of the Bering Sea through Wednesday before the
low weakens and moves toward the Southwest coast Wednesday night.
The next system enters the western waters Thursday morning,
bringing another round of precipitation and gusty winds to the
area.

&&

.LONG TERM FORECAST (Thursday evening through Tuesday)...
Expect the active pattern to continue with near to above normal
temperatures, periodic clouds/snow with dry and colder periods
between.

A short-lived dry outflow pattern is on tap for Thursday night as
the previous upper-level trough exits to the east. Dry, clear,
and cold conditions will prevail everywhere, as well as gusty gap
winds along the north gulf coast. These conditions will hold on
Friday, slowly weakening, as the next system pushes into the area
from the southwest overnight Friday into Saturday. Guidance is
struggling with how to track the triple point low as the front
moves into the Gulf, and hence how far north to track to frontal
boundary. The front should make it to the coast and the southern
Kenai Peninsula, bringing snow to these areas. A return to short-
lived outflow conditions comes late weekend when that system
exits.

Into the extended forecast, the upper-level southwesterly flow
remains. The progressive nature of the pattern will continue
through next week, with front and lows rolling into the region
every 1-2 days. At this point, the low amplitude pattern should
stop any big warm-up from happening, any warmer air associated
with the fronts should slide to the east with the triple-point
lows.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...None.
MARINE...Gale 173 175-179.

&&

SYNOPSIS AND MODEL DISCUSSION...AMD
SOUTHCENTRAL ALASKA...CB
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...TP
LONG TERM...MTL