Storm Warning 171, NWS Anchorage, AK

038 
FZAK62 PAFC 180003
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
303 PM AKST THU DEC 17 2015

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.

PKZ499-181530-
303 PM AKST THU DEC 17 2015
.SYNOPSIS FOR CENTRAL BERING SEA...

A 951 MB LOW AT 57N 172E MOVES TO 59N 169W BY SAT AFTERNOON AS A
963 MB LOW. THE ASSOCIATED FRONT MOVES ACROSS THE ALEUTIANS INTO
SOUTHWEST ALASKA BY SAT MORNING. A 979 MB LOW ENTERS FROM THE
NORTH PACIFIC NEAR 53N 167E SAT MORNING AND MOVES TO 55N 169E AS A
977 MB LOW SAT AFTERNOON. A FRONT TRAILS OVER THE WESTERN
ALEUTIANS THROUGH SAT AFTERNOON.

$$

PKZ411-181530-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
303 PM AKST THU DEC 17 2015

...STORM WARNING THROUGH FRIDAY NIGHT...

.TONIGHT...S TO W WIND 35 TO 50 KT. SEAS 18 TO 26 FT. RAIN.
.FRI...W WIND 40 TO 55 KT...EXCEPT VARIABLE 20 KT N OF 57N. SEAS
20 TO 35 FT. RAIN AND SNOW SHOWERS.
.FRI NIGHT...W WIND 40 TO 55 KT...EXCEPT N 20 KT N OF 57. SEAS 20
TO 35 FT. SNOW AND RAIN SHOWERS.
.SAT...W WIND 35 TO 50 KT. SEAS 15 TO 30 FT.
.SAT NIGHT...S WIND 15 TO 30 KT. SEAS 10 TO 17 FT.
.SUN...NW WIND 15 TO 30 KT. SEAS 9 TO 14 FT.
.MON...N WIND 10 TO 25 KT. SEAS 10 TO 15 FT.
.TUE...S WIND 10 TO 20 KT. SEAS 11 TO 14 FT.

$$

PKZ412-181530-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
303 PM AKST THU DEC 17 2015

...STORM WARNING TONIGHT...

.TONIGHT...SE WIND 35 TO 50 KT BECOMING S 20 TO 35 KT AFTER
MIDNIGHT. SEAS 13 TO 20 FT. RAIN.
.FRI...S WIND 25 TO 40 KT. SEAS 18 TO 30 FT. RAIN AND SNOW
SHOWERS.
.FRI NIGHT...S TO W WIND 30 TO 45 KT. SEAS 21 TO 36 FT. RAIN
AND SNOW SHOWERS.
.SAT...NW WIND 30 TO 45 KT. SEAS 19 TO 34 FT.
.SAT NIGHT...W WIND 25 TO 40 KT. SEAS 15 TO 23 FT.
.SUN THROUGH TUE...NE WIND 10 TO 25 KT. SEAS 9 TO 16 FT.

$$

PKZ413-181530-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
303 PM AKST THU DEC 17 2015

...STORM WARNING FRIDAY AND FRIDAY NIGHT...

.TONIGHT...SW WIND 35 TO 45 KT. SEAS 16 TO 25 FT. RAIN.
.FRI...SW WIND 40 TO 55 KT. SEAS 23 TO 37 FT. RAIN AND SNOW
SHOWERS.
.FRI NIGHT...W WIND 45 TO 55 KT. SEAS 32 TO 40 FT. SNOW AND RAIN
SHOWERS.
.SAT...W WIND 40 TO 55 KT. SEAS 24 TO 39 FT.
.SAT NIGHT...SW WIND 25 TO 40 KT. SEAS 15 TO 30 FT.
.SUN...SE WIND 15 TO 30 KT. SEAS 9 TO 14 FT.
.MON...NW WIND 10 TO 25 KT. SEAS 13 TO 16 FT.
.TUE...W WIND 10 TO 20 KT. SEAS 12 TO 16 FT.

$$

PKZ414-181530-
BERING SEA OFFSHORE EAST OF 171W-
303 PM AKST THU DEC 17 2015

...STORM WARNING TONIGHT AND FRIDAY NIGHT...

.TONIGHT...SE WIND 35 TO 50 KT. SEAS 8 TO 13 FT BUILDING TO 13 TO
19 FT AFTER MIDNIGHT. RAIN AND SNOW.
.FRI...SW WIND 25 TO 40 KT. SEAS 15 TO 23 FT. RAIN SHOWERS.
.FRI NIGHT...SW WIND 35 TO 50 KT. SEAS 17 TO 32 FT. RAIN AND
SNOW SHOWERS.
.SAT...W WIND 35 TO 50 KT. SEAS 22 TO 37 FT.
.SAT NIGHT...W WIND 30 TO 45 KT. SEAS 18 TO 33 FT.
.SUN THROUGH TUE...NW WIND 15 TO 30 KT. SEAS 10 TO 18 FT.

$$

499 
FZAK62 PAFC 181240
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
340 AM AKST FRI DEC 18 2015

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.

PKZ499-190230-
340 AM AKST FRI DEC 18 2015
.SYNOPSIS FOR CENTRAL BERING SEA...
A 944 MB LOW AT 57N 175E MOVES TO 59N 173W SAT MORNING AT 955 MB...
THEN MOVES INLAND NEAR 60N 164W SUN MORNING AT 973 MB. AN ASSOCIATED
FRONT OVER THE EASTERN ALEUTIANS MOVES INTO SOUTHWEST ALASKA BY
FRI AFTERNOON. A NEW FRONT MOVES OVER THE WESTERN ALEUTIANS BY
SAT MORNING AND REMAINS STATIONARY THROUGH SUN.

$$

PKZ411-190230-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
340 AM AKST FRI DEC 18 2015

...STORM WARNING THROUGH TONIGHT...

.TODAY...W WIND 45 TO 60 KT EXCEPT N 20 TO 30 KT N OF 56N. SEAS
20 TO 35 FT. RAIN AND SNOW SHOWERS.
.TONIGHT...W WIND 40 TO 55 KT EXCEPT N 20 TO 30 KT N OF 56N. SEAS
19 TO 34 FT. SNOW AND RAIN SHOWERS.
.SAT...W WIND 30 TO 45 KT BECOMING S 15 TO 30 KT IN THE
AFTERNOON. SEAS 14 TO 28 FT.
.SAT NIGHT...S WIND 15 TO 30 KT. SEAS 11 TO 16 FT.
.SUN THROUGH MON...W WIND 10 TO 25 KT. SEAS 9 TO 14 FT.
.TUE...S WIND 10 TO 20 KT. SEAS 11 TO 14 FT.

$$

PKZ412-190230-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
340 AM AKST FRI DEC 18 2015

...STORM WARNING THROUGH SATURDAY...

.TODAY...S WIND 25 TO 40 KT BECOMING SW 40 TO 55 KT IN THE
AFTERNOON. SEAS 18 TO 25 FT BUILDING TO 20 TO 35 FT IN THE
AFTERNOON. RAIN SHOWERS.
.TONIGHT...W WIND 35 TO 50 KT. SEAS 22 TO 37 FT. RAIN AND SNOW
SHOWERS.
.SAT...W WIND 35 TO 50 KT. SEAS 19 TO 34 FT. SNOW AND RAIN
SHOWERS.
.SAT NIGHT...W WIND 30 TO 45 KT. SEAS 15 TO 23 FT.
.SUN...SE WIND 15 TO 30 KT. SEAS 9 TO 14 FT.
.MON THROUGH TUE...NE WIND 10 TO 25 KT. SEAS 9 TO 14 FT.

$$

PKZ413-190230-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
340 AM AKST FRI DEC 18 2015

...STORM WARNING THROUGH SATURDAY...

.TODAY...SW WIND 45 TO 60 KT. SEAS 25 TO 40 FT. RAIN AND SNOW
SHOWERS.
.TONIGHT...W WIND 55 KT. SEAS 34 TO 41 FT. SNOW AND RAIN SHOWERS.
.SAT...W WIND 35 TO 50 KT. SEAS 23 TO 38 FT.
.SAT NIGHT...SW WIND 25 TO 40 KT. SEAS 14 TO 29 FT.
.SUN...SE WIND 25 TO 40 KT. SEAS 10 TO 15 FT.
.MON...NW WIND 15 TO 30 KT. SEAS 12 TO 18 FT.
.TUE...W WIND 10 TO 20 KT. SEAS 12 TO 16 FT.

$$

PKZ414-190230-
BERING SEA OFFSHORE EAST OF 171W-
340 AM AKST FRI DEC 18 2015

...STORM WARNING TONIGHT AND SATURDAY...

.TODAY...SW WIND 25 TO 35 KT INCREASING TO 30 TO 45 KT IN THE
AFTERNOON. SEAS 14 TO 28 FT. RAIN SHOWERS.
.TONIGHT...SW WIND 35 TO 50 KT. SEAS 20 TO 35 FT. RAIN AND SNOW
SHOWERS.
.SAT...SW WIND 35 TO 50 KT. SEAS 24 TO 39 FT. RAIN AND SNOW
SHOWERS.
.SAT NIGHT...W WIND 30 TO 45 KT. SEAS 21 TO 32 FT.
.SUN...NW WIND 25 TO 40 KT. SEAS 10 TO 18 FT.
.MON...NE WIND 20 TO 30 KT. SEAS 8 TO 13 FT.
.TUE...NW WIND 15 TO 25 KT. SEAS 9 TO 17 FT.

$$

260 
FZAK62 PAFC 190001
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
301 PM AKST FRI DEC 18 2015

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.

PKZ499-191445-
301 PM AKST FRI DEC 18 2015
.SYNOPSIS FOR CENTRAL BERING SEA...

A 946 MB LOW AT 58N 178W MOVES TO 60N 165W AS A 966 MB LOW SAT NIGHT
AND THEN MOVES ONSHORE SUN MORNING. A 987 MB LOW NEAR 50N 164E
SAT MORNING MOVES TO 55N 171E SAT EVENING AS A 972 MB LOW BEFORE
MOVING TOWARDS KAMCHATKA SUN MORNING. A NORTH PACIFIC LOW MOVES
TO 49N 178W SUN AFTERNOON AS A 964 MB LOW.

$$

PKZ411-191445-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
301 PM AKST FRI DEC 18 2015

...STORM WARNING TONIGHT...

.TONIGHT...W WIND 40 TO 55 KT EXCEPT N 20 TO 30 KT N OF 57N. SEAS
18 TO 33 FT. SNOW AND RAIN SHOWERS.
.SAT...W WIND 30 TO 45 KT BECOMING S 20 TO 35 KT IN THE
AFTERNOON. SEAS 16 TO 24 FT.
.SAT NIGHT...S WIND 20 TO 35 KT. SEAS 12 TO 20 FT. SNOW AND RAIN.
.SUN...SW WIND 15 TO 30 KT. SEAS 11 TO 18 FT.
.SUN NIGHT...W WIND 10 TO 20 KT. SEAS 9 TO 13 FT.
.MON...NW WIND 10 TO 20 KT. SEAS 8 TO 12 FT.
.TUE...S WIND 10 TO 20 KT. SEAS 6 TO 10 FT.
.WED...NE WIND 10 TO 25 KT. SEAS 6 TO 9 FT.

$$

PKZ412-191445-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
301 PM AKST FRI DEC 18 2015

...STORM WARNING THROUGH SATURDAY...

.TONIGHT...W WIND 35 TO 50 KT. SEAS 23 TO 38 FT. RAIN AND SNOW
SHOWERS.
.SAT...W WIND 35 TO 50 KT. SEAS 19 TO 34 FT. SNOW AND RAIN
SHOWERS.
.SAT NIGHT...W WIND 30 TO 45 KT DIMINISHING TO 20 TO 35 KT AFTER
MIDNIGHT. SEAS 16 TO 24 FT.
.SUN...S WIND 10 TO 25 KT. SEAS 9 TO 14 FT.
.SUN NIGHT...E WIND 15 TO 30 KT. SEAS 9 TO 13 FT.
.MON THROUGH TUE...NE WIND 15 TO 30 KT. SEAS 7 TO 12 FT.
.WED...E WIND 10 TO 25 KT. SEAS 7 FT.

$$

PKZ413-191445-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
301 PM AKST FRI DEC 18 2015

...STORM WARNING THROUGH SATURDAY...

.TONIGHT...W WIND 50 TO 60 KT. SEAS 32 TO 42 FT. SNOW AND RAIN
SHOWERS.
.SAT...W WIND 40 TO 55 KT. SEAS 22 TO 37 FT.
.SAT NIGHT...W WIND 25 TO 40 KT BECOMING S 15 TO 30 KT AFTER
MIDNIGHT. SEAS 15 TO 23 FT.
.SUN...S WIND 15 TO 30 KT. SEAS 9 TO 13 FT.
.SUN NIGHT...E WIND 25 TO 40 KT. SEAS 10 TO 17 FT.
.MON...N WIND 15 TO 30 KT. SEAS 9 TO 17 FT.
.TUE...W WIND UP TO 20 KT. SEAS 9 FT.
.WED...SE WIND 15 TO 25 KT. SEAS 6 TO 11 FT.

$$

PKZ414-191445-
BERING SEA OFFSHORE EAST OF 171W-
301 PM AKST FRI DEC 18 2015

...STORM WARNING THROUGH SATURDAY...

.TONIGHT...SW WIND 40 TO 55 KT. SEAS 21 TO 36 FT. RAIN AND SNOW
SHOWERS.
.SAT...W WIND 35 TO 50 KT. SEAS 25 TO 40 FT. RAIN AND SNOW
SHOWERS.
.SAT NIGHT...W WIND 35 TO 45 KT DIMINISHING TO 25 TO 40 KT AFTER
MIDNIGHT. SEAS 19 TO 31 FT. RAIN SHOWERS.
.SUN...W WIND 20 TO 35 KT. SEAS 12 TO 20 FT.
.SUN NIGHT...NE WIND 25 TO 40 KT. SEAS 7 TO 11 FT.
.MON...NE WIND 15 TO 30 KT. SEAS 7 TO 12 FT.
.TUE...NW WIND 15 TO 25 KT. SEAS 8 FT.
.WED...SE WIND 10 TO 25 KT. SEAS 5 TO 8 FT.

$$

691 
FZAK62 PAFC 191241
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
341 AM AKST SAT DEC 19 2015

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.

PKZ499-200245-
341 AM AKST SAT DEC 19 2015
.SYNOPSIS FOR CENTRAL BERING SEA...
A 955 MB LOW NEAR 59N 172W MOVES INLAND NEAR 60N 165W SUN MORNING
AT 975 MB. A FRONT ENTERS THE WESTERN ALEUTIANS ASSOCIATED WITH A
NORTH PACIFIC LOW AND STALLS ON SUNDAY. A NEW LOW DEVELOPS ALONG
THIS FRONT NEAR 44N 174E SUN MORNING AT 982 MB AND MOVES TO 54N
178W MON MORNING AT 971 MB.

$$

PKZ411-200245-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
341 AM AKST SAT DEC 19 2015

...GALE WARNING THROUGH TONIGHT...

.TODAY...W WIND 30 TO 45 KT DIMINISHING TO 15 TO 30 KT IN THE
AFTERNOON. S OF 56N...BECOMING S 20 TO 35 KT IN THE AFTERNOON.
SEAS 16 TO 24 FT.
.TONIGHT...S WIND 20 TO 35 KT. SEAS 11 TO 18 FT. SNOW AND RAIN.
.SUN...W WIND 15 TO 30 KT. SEAS 9 TO 16 FT. SNOW AND RAIN.
.SUN NIGHT...N WIND 25 TO 40 KT. SEAS 9 TO 16 FT.
.MON...NE WIND 25 TO 40 KT. SEAS 10 TO 17 FT.
.TUE...S WIND 10 TO 20 KT. SEAS 6 TO 10 FT.
.WED...NE WIND 10 TO 25 KT. SEAS 6 TO 9 FT.

$$

PKZ412-200245-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
341 AM AKST SAT DEC 19 2015

...STORM WARNING TODAY...

.TODAY...W WIND 35 TO 50 KT. SEAS 20 TO 35 FT. SNOW SHOWERS AND
RAIN SHOWERS.
.TONIGHT...W WIND 30 TO 45 KT. WIND BECOMING SW 20 TO 35 KT AFTER
MIDNIGHT W OF 176W. SEAS 16 TO 24 FT.
.SUN...SE WIND 10 TO 25 KT. SEAS 9 TO 14 FT.
.SUN NIGHT...E WIND 20 TO 35 KT. SEAS 9 TO 14 FT.
.MON THROUGH TUE...NE WIND 15 TO 30 KT. SEAS 8 TO 13 FT.
.WED...E WIND 10 TO 25 KT. SEAS 7 FT.

$$

PKZ413-200245-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
341 AM AKST SAT DEC 19 2015

...STORM WARNING TODAY...

.TODAY...W WIND 35 TO 50 KT. SEAS 27 TO 37 FT SUBSIDING TO 19 TO
32 FT IN THE AFTERNOON.
.TONIGHT...SW WIND 25 TO 40 KT DIMINISHING TO 15 TO 30 KT AFTER
MIDNIGHT. SEAS 15 TO 23 FT.
.SUN...SE WIND 20 TO 35 KT. SEAS 9 TO 13 FT.
.SUN NIGHT...E WIND 25 TO 40 KT. SEAS 11 TO 18 FT.
.MON...N WIND 30 TO 45 KT. SEAS 12 TO 20 FT.
.TUE...W WIND UP TO 20 KT. SEAS 9 FT.
.WED...SE WIND 15 TO 25 KT. SEAS 6 TO 11 FT.

$$

PKZ414-200245-
BERING SEA OFFSHORE EAST OF 171W-
341 AM AKST SAT DEC 19 2015

...STORM WARNING TODAY...

.TODAY...W WIND 35 TO 50 KT. SEAS 24 TO 38 FT. RAIN AND SNOW
SHOWERS.
.TONIGHT...W WIND 35 TO 45 KT DIMINISHING TO 25 TO 40 KT AFTER
MIDNIGHT. SEAS 19 TO 30 FT. SNOW SHOWERS AND RAIN SHOWERS.
.SUN...W WIND 25 TO 40 KT DIMINISHING TO 15 TO 30 KT IN THE
AFTERNOON. S OF THE PRIBILOF ISLANDS...WIND BECOMING SE 15 TO 25
KT IN THE AFTERNOON. SEAS 12 TO 20 FT.
.SUN NIGHT...NE WIND 20 TO 35 KT. SEAS 6 TO 11 FT.
.MON...NE WIND 15 TO 30 KT. SEAS 9 TO 14 FT.
.TUE...NW WIND 15 TO 25 KT. SEAS 8 FT.
.WED...SE WIND 10 TO 25 KT. SEAS 5 TO 8 FT.

$$

202 
FZAK62 PAFC 192341
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
241 PM AKST SAT DEC 19 2015

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.

PKZ499-201515-
241 PM AKST SAT DEC 19 2015
.SYNOPSIS FOR CENTRAL BERING SEA...
A 967 MB LOW AT 60N 168W WILL MOVE ONSHORE NEAR 60N 165W SUN
MORNING AT 977 MB. A 977 MB LOW NEAR 55N 170E WILL MOVE TO 
59N 167E SUN NIGHT AT 983 MB AND THEN DISSIPATE MON MORNING. 
A 990 MB LOW NEAR 47N 174E WILL MOVE TO 52N 180 AND RAPIDLY
STRENGTHEN TO 968 MB SUN AFTERNOON. THIS LOW WILL THEN MOVE 
TO 57N 173W AT 968 MB MON AFTERNOON.

$$

PKZ411-201515-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE-
241 PM AKST SAT DEC 19 2015

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

.TONIGHT...S TO W WIND 20 TO 35 KT. SEAS 12 TO 17 FT. SNOW AND RAIN.
.SUN...N TO W WIND 15 TO 30 KT. SEAS 9 TO 15 FT. SNOW AND RAIN.
.SUN NIGHT...NW WIND 25 TO 45 KT...BECOMING E 45 KT N OF 55N
AFTER MIDNIGHT. SEAS 12 TO 29 FT. SNOW. FREEZING SPRAY.
.MON...NW WIND 25 TO 40 KT...EXCEPT NE 45 KT N OF 55N. 
SEAS 12 TO 20 FT.
.MON NIGHT...N WIND 25 TO 40 KT. SEAS 15 TO 21 FT.
.TUE THROUGH WED...E WIND 20 TO 35 KT. SEAS 11 TO 19 FT.
.THU...N WIND 20 TO 35 KT. SEAS 18 TO 22 FT.

$$

PKZ412-201515-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N-
241 PM AKST SAT DEC 19 2015

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

.TONIGHT...W WIND 30 TO 45 KT BECOMING SW 20 TO 35 KT 
AFTER MIDNIGHT. SEAS 15 TO 23 FT.
.SUN...SE WIND 15 TO 30 KT. SEAS 9 TO 15 FT.
.SUN NIGHT...E WIND 25 TO 40 KT. SEAS 9 TO 16 FT. RAIN. 
.MON...NE WIND 30 TO 45 KT. SEAS 12 TO 17 FT.
.MON NIGHT...NE WIND 30 TO 45 KT. SEAS 13 TO 18 FT.
.TUE...NE WIND 25 TO 40 KT. SEAS 11 TO 19 FT.
.WED THROUGH THU...E WIND 25 TO 40 KT. SEAS 14 TO 22 FT.

$$

PKZ413-201515-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N-
241 PM AKST SAT DEC 19 2015

...STORM WARNING SUNDAY NIGHT...

.TONIGHT...SW WIND 20 TO 35 KT. SEAS 14 TO 22 FT.
.SUN...S WIND 15 TO 30 KT BECOMING SE 25 TO 40 KT IN THE 
AFTERNOON. SEAS 10 TO 15 FT. RAIN AND SNOW.
.SUN NIGHT...SE WIND 30 TO 45 KT BECOMING SW 40 TO 55 KT 
AFTER MIDNIGHT. SEAS 14 TO 22 FT. RAIN AND SNOW.
.MON...W WIND 40 TO 55 KT. SEAS 15 TO 26 FT.
.MON NIGHT...W WIND 35 TO 50 KT. SEAS 16 TO 20 FT.
.TUE...NW WIND 35 TO 50 KT. SEAS 11 TO 17 FT.
.WED...SE WIND 20 TO 35 KT. SEAS 12 TO 20 FT.
.THU...NE WIND 20 TO 35 KT. SEAS 14 TO 22 FT.

$$

PKZ414-201515-
BERING SEA OFFSHORE EAST OF 171W-
241 PM AKST SAT DEC 19 2015

...GALE WARNING THROUGH SUNDAY NIGHT...

.TONIGHT...W WIND 30 TO 45 KT. SEAS 20 TO 30 FT. 
SNOW AND RAIN SHOWERS.
.SUN...W WIND 25 TO 40 KT DIMINISHING TO 15 TO 30 KT 
IN THE AFTERNOON. SEAS 11 TO 19 FT.
.SUN NIGHT...VARIABLE WIND 20 KT BECOMING SW TO SE 
WIND 20 TO 35 KT. SEAS 7 TO 14 FT.
.MON...S WIND 30 TO 45 KT. SEAS 10 TO 18 FT.
.MON NIGHT...SW WIND 25 TO 40 KT. SEAS 10 TO 18 FT.
.TUE...W WIND 25 TO 40 KT. SEAS 8 TO 16 FT.
.WED...E WIND 20 TO 35 KT. SEAS 8 TO 13 FT.
.THU...E WIND 25 TO 40 KT. SEAS 13 TO 20 FT.

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
509 PM AKST WED DEC 16 2015

.ANALYSIS AND UPPER LEVELS...
A BROAD UPPER LEVEL TROUGH EXTENDS FROM THE NORTHERN BERING SEA
INTO THE NORTH PACIFIC. A WEAKENING SURFACE LOW EMBEDDED IN THE
UPPER TROUGH IS EVIDENT SOUTHWEST OF SAINT MATTHEW ISLAND.
SATELLITE IMAGERY SHOWS A BROAD AREA OF OPEN AND CLOSED CELL
CUMULUS(SHOWERS) INDICATIVE OF COLD ADVECTION AND UNSTABLE
CONDITIONS ACROSS MUCH OF THE BERING SEA. A SECONDARY SURFACE LOW
INFLUENCED BY THE UPPER TROUGH IS SOUTH OF KODIAK ISLAND. THE
ASSOCIATED OCCLUDED FRONT EXTENDS NORTH AND EAST ACROSS THE GULF
WITH THE TRIPLE POINT MOVING RAPIDLY EAST TOWARD HAIDA GWAII UNDER
A STRONG WESTERLY JET. THE SOUTHWEST GULF LOW IS PRODUCING STRONG
EAST TO NORTH WINDS ACROSS THE GULF AND BRISK NORTHERLY WINDS
ACROSS BRISTOL BAY AND THE AK PEN. PRECIPITATION WITH THIS FEATURE
IS MAINLY IMPACTING KODIAK ISLAND WITH STEADY RAIN...THOUGH RAIN
AND SNOW ARE HEADING TOWARD THE NORTH GULF COAST WITH THE SURFACE
OCCLUSION.

&&

.MODEL DISCUSSION...
IN THE EAST...MODELS ARE EXCELLENT AGREEMENT IN GENERAL LOW
POSITION...WIND FIELDS...AND QPF PATTERN. GALES TO STORM FORCE
WINDS ACROSS THE GULF AND GAP FLOWS ACROSS THE SOUTHCENTRAL
MAINLAND WILL BE THE MAIN IMPACTS THROUGH THE SHORT TERM. THE GFS
AND GEM REGIONAL WILL BE USED THE FORECAST PACKAGE.

OUT WEST...MODELS DIFFER SOME ON THE TRACK AND POSITION OF THE
DEVELOPING LOW MOVING INTO THE BERING SEA ON THU. HOWEVER...THE
GENERAL WIND FIELDS ARE SIMILAR. THE GFS WILL BE USED THIS
FORECAST PACKAGE.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (DAYS 1 AND 2)...
THE MAIN IMPACTS THROUGH THE SHORT TERM WILL BE STRONG WINDS
ACROSS THE GULF AND MINOR OUTFLOW CONDITIONS OVER THE MAINLAND
THROUGH EARLY THU. THE MAIN CULPRITS ARE A DEEPENING LOW OVER THE
SOUTHWEST GULF AND ITS ASSOCIATED OCCLUDED FRONT. GALES TO STORM
FORCE WINDS WILL SPREAD NORTH ACROSS ACROSS THE GULF TONIGHT AHEAD
OF THE FRONT IMPACTING THE MARINE COASTAL AREAS. WINDS ARE
EXPECTED TO DIMINISH ON THU AS THE LOW AND FRONT START TO PUSH
EASTWARD AND WEAKEN. BRISK GAP FLOWS AREA ALSO EXPECTED ACROSS THE
MAINLAND TONIGHT IN CONJUNCTION WITH THE INCREASED GULF
WINDS...THEN DECREASE SOME ON THU. THE BRUNT OF THE PRECIPITATION
ASSOCIATED WITH GULF LOW AND OCCLUDED FRONT WILL FALL ACROSS THE
GULF WITH VERY LITTLE MAKING IT INLAND. A SECONDARY FRONT
ASSOCIATED WITH A DEVELOPING LOW TRACKING ACROSS THE BERING SEA
WILL BRING ANOTHER SHOT OF RAIN AND SNOW AND INCREASED WINDS TO
THE WESTERN GULF AND SOUTHCENTRAL ON FRI.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (DAYS 1 AND 2)...
A FRONT ASSOCIATED WITH THE DEEP LOW OVER THE WESTERN GULF WILL
SUPPORT A CHANCE OF SNOW ALONG THE ALASKA PENINSULA AND THE
ALEUTIAN RANGE THROUGH TONIGHT BEFORE THE LOW BEGINS TO PULL AWAY
FROM THE AREA ON THURSDAY MORNING. OTHERWISE...THE SOUTHWEST
MAINLAND WILL REMAIN DRY THROUGH THURSDAY EVENING WITH RELATIVELY
BENIGN CONDITIONS BENEATH TRANSITORY UPPER LEVEL RIDGING.
PRECIPITATION WILL RETURN TO THE AREA ON FRIDAY MORNING AS A FRONT
ARRIVES ALONG THE COAST. TEMPERATURES WILL REMAIN COLD ENOUGH TO
SUPPORT ALL SNOW...WITH A BRIEF WINDOW OF BLOWING SNOW POSSIBLE
ALONG THE COAST AS GUSTY EAST TO SOUTHEAST WINDS ACCOMPANY THE
FRONT. HOWEVER...THESE CONDITIONS WOULD BE SHORT LIVED AS THE
FRONT QUICKLY WEAKENS AND PUSHES INLAND.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (DAYS 1 AND 2)...
NORTHERLY FLOW AND AND A WEAK UPPER LEVEL TROUGH WILL CONTINUE TO
SUPPORT SNOW SHOWERS THROUGH TONIGHT ACROSS THE EASTERN HALF OF
THE BERING BEFORE THESE SHOWERS QUICKLY TAPER OFF ON THURSDAY
MORNING AS RIDGING TEMPORARILY MOVES OVERHEAD. ATTENTION THEN
TURNS TO THE POWERFUL LOW AND ASSOCIATED FRONT POISED TO MOVE INTO
THE WESTERN BERING TONIGHT. GALE FORCE SOUTHERLY WINDS AND A MIX
OF RAIN AND SNOW WILL ACCOMPANY THE ARRIVAL OF THE FRONT...WITH
PRECIPITATION QUICKLY CHANGING TO ALL RAIN AS WARM NORTH PACIFIC
AIR SURGES NORTHWARD. THE FRONT WILL CONTINUE EASTWARD ACROSS THE
BERING THROUGH THURSDAY NIGHT...EVENTUALLY SPREADING PRECIPITATION
AND GALE FORCE WINDS TO THE EASTERN ALEUTIANS AND THE AKPEN.

HOWEVER...THE MAIN FORECAST CHALLENGE WITH THIS SYSTEM WILL BE THE
POTENTIAL FOR WARNING LEVEL WINDS ACROSS THE WESTERN AND CENTRAL
ALEUTIANS FROM THURSDAY NIGHT INTO FRIDAY NIGHT AS WINDS TURN
SOUTHWESTERLY BEHIND THE FRONT AS THE LOW CENTER BEGINS TO MOVE
INTO THE BERING WITH FAVORABLE UPPER LEVEL JET SUPPORT. THE BEST
HIGH WIND POTENTIAL FOR NOW APPEARS TO BE OVER THE WESTERN PART OF
THE CHAIN THURSDAY NIGHT INTO FRIDAY MORNING AS COLD ADVECTION
HELPS THE STRONGEST WINDS TO MIX DOWN TO THE SURFACE. THEREFORE
HAVE UPGRADED THE HIGH WIND WATCH TO A HIGH WIND WARNING FOR THE
WESTERN ALEUTIANS WITH ISSUANCE OF THE AFTERNOON PACKAGE.
CONFIDENCE REMAINS LOWER FOR THE CENTRAL ALEUTIANS AS 12Z MODEL
RUNS HAVE SHOWN SOME UNCERTAINTY REGARDING THE TRACK OF THE
LOW...LEAVING OPEN THE POSSIBILITY THAT THE CORE OF STRONGEST
WINDS WILL REMAIN NORTH OF ADAK AND ATKA. THEREFORE CONTINUED THE
HIGH WIND WATCH FOR THE CENTRAL ALEUTIANS AS OPPOSED TO ISSUING A
WARNING AT THIS TIME.

&&

.LONG TERM FORECAST (DAYS 3 THROUGH 7)...
WEAKENING LOW PRESSURE WITH STORM-FORCE WINDS DIMINISHING TO
WIDESPREAD GALES WILL TRANSITION TO THE GULF WITH SECONDARY LOW
DEVELOPMENT OVER THE NORTHERN OR CENTRAL GULF. CONFIDENCE IN THE
EXACT LOCATION IS DEPENDENT ON THE LOCATION OF THE ACCOMPANYING
JET STREAM. SNOW CHANCES FOR SOUTHCENTRAL INCLUDING THE LARGER
POPULATION CENTERS WILL BE HIGHLY DEPENDENT ON HOW FAR NORTH
TOWARD PRINCE WILLIAM SOUND THIS SECONDARY LOW DEVELOPMENT
OCCURS...AS WELL AS ANY SOUTHEASTERLY MOISTURE PUSH PROVIDED BY
POTENTIAL JET DEVELOPMENT ON THE DOWNSTREAM SIDE OF THE NEGATIVE-
TILTED UPPER LEVEL TROUGH. OVERALL...CONFIDENCE IN SNOW CHANCES
FOR ANCHORAGE AND VICINITY HAVE DIMINISHED SOMEWHAT IN THE LAST
DAY...ESPECIALLY FOR SUNDAY INTO MONDAY.

MEANWHILE OVER THE BERING A SURFACE FRONT WILL ELONGATE FROM WEST
TO EAST ACROSS THE SOUTHERN BERING AND SERVE AS A FOCUSING
MECHANISM FOR SHOWERS AND GUSTY WINDS. BEHIND THIS FRONT...COLD
ADVECTION WITH SCATTERED SNOW SHOWERS WILL BE COMMON OVER THE
NORTHERN AND CENTRAL BERING.

BY THE EARLY TO MIDDLE PART OF NEXT WEEK...AN ARCTIC AIR MASS WILL
SETTLE OVER MUCH OF THE REGION...BRINGING BELOW NORMAL
TEMPERATURES (BY DECEMBER STANDARDS) TO MOST AREAS THAT MAY
PERSIST UNTIL THE END OF THE YEAR.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...HIGH WIND WARNING 191.
 HIGH WIND WATCH 187.
MARINE...STORM WARNING 119 120 130 131 132 138 139 150 175 176 177
178 179 185.
 GALE WARNING 121 127 128 136 137 141 155 165 170 172
173 174 180 181.
 HEAVY FREEZING SPRAY 180 181 185.

&&

SYNOPSIS AND MODEL DISCUSSION...RC
SOUTHCENTRAL ALASKA...RC
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...CB
LONG TERM...CC