Gale Warning 579, NWS Anchorage, AK

947 
FZAK61 PAFC 012325
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT THU SEP 1 2011

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.

PKZ399-021500-
400 PM AKDT THU SEP 1 2011
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A 1004 MB LOW NEAR 52N 155W WILL STRENGTHEN TO 986 MB AS IT MOVES 
TO 57N 151W FRI MORNING. THIS LOW WILL THEN WEAKEN TO 992 MB AS 
IT MOVES TO 58N 147W SAT AFTERNOON.

$$

PKZ351-021500-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 PM AKDT THU SEP 1 2011

...GALE WARNING THROUGH FRIDAY NIGHT...

.TONIGHT...SW WIND 15 KT BECOMING E 35 KT AFTER MIDNIGHT. SEAS 9 FT.
RAIN.
.FRI...E WIND 35 KT BECOMING S 25 TO 35 KT IN THE AFTERNOON. SEAS 14
FT. RAIN.
.FRI NIGHT...S WIND 25 TO 35 KT. SEAS 18 FT. RAIN.
.SAT...S WIND 30 KT. SEAS 15 FT. 
.SAT NIGHT...SW WIND 20 KT. SEAS 11 FT. 
.SUN...SE WIND 30 KT. SEAS 8 FT. 
.MON...SE WIND 35 KT. SEAS 12 FT. 
.TUE...S WIND 30 KT. SEAS 12 FT.  

$$

PKZ352-021500-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 PM AKDT THU SEP 1 2011

...GALE WARNING THROUGH FRIDAY NIGHT...

.TONIGHT...S WIND 20 KT BECOMING SE 35 KT AFTER MIDNIGHT. SEAS 7 FT
BUILDING TO 12 FT AFTER MIDNIGHT. RAIN.
.FRI...SW WIND 35 TO 40 KT. SEAS 17 FT. RAIN.
.FRI NIGHT...SW WIND 25 TO 35 KT. SEAS 17 FT. RAIN.
.SAT...W WIND 30 KT. SEAS 14 FT. 
.SAT NIGHT...SW WIND 25 KT. SEAS 11 FT. 
.SUN...SE WIND 30 KT. SEAS 9 FT. 
.MON...SE WIND 35 KT. SEAS 11 FT. 
.TUE...S WIND 30 KT. SEAS 11 FT.  

$$

060 
FZAK61 PAFC 021133
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT FRI SEP 2 2011

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.

PKZ399-030300-
400 AM AKDT FRI SEP 2 2011
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A 990 MB LOW AT 56N 152W WILL MOVE TO 58N 150W BY LATE FRI NIGHT 
THEN TO 59N 149W BY LATE SAT NIGHT. 
$$

PKZ351-030300-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 AM AKDT FRI SEP 2 2011

...GALE WARNING THROUGH TONIGHT...

.TODAY...S WIND 40 KT. SEAS 11 FT BUILDING TO 16 FT IN THE
AFTERNOON. RAIN.
.TONIGHT...S WIND 40 KT. SEAS 19 FT. RAIN.
.SAT...S WIND 30 KT. SEAS 15 FT. 
.SAT NIGHT...SW WIND 20 KT. SEAS 12 FT. 
.SUN...SE WIND 35 KT. SEAS 13 FT. 
.MON...SE WIND 40 KT. SEAS 18 FT. 
.TUE...SE WIND 30 KT. SEAS 19 FT.  

$$

PKZ352-030300-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 AM AKDT FRI SEP 2 2011

...GALE WARNING THROUGH TONIGHT...

.TODAY...SW WIND 40 KT. SEAS 19 FT. RAIN.
.TONIGHT...SW WIND 40 KT DIMINISHING TO 30 KT AFTER MIDNIGHT. SEAS
17 FT. RAIN.
.SAT...SW WIND 30 KT. SEAS 14 FT. 
.SAT NIGHT...SW WIND 25 KT. SEAS 12 FT. 
.SUN...SE WIND 40 KT. SEAS 14 FT. 
.MON...SE WIND 40 KT. SEAS 16 FT. 
.TUE...S WIND 30 KT. SEAS 18 FT.  

$$

083 
FZAK61 PAFC 022349
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT FRI SEP 2 2011

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.

PKZ399-031500-
400 PM AKDT FRI SEP 2 2011
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A 992 MB LOW NEAR 58N 151W MAINTAINS STRENGTH AS IT MOVES TO 58N 150W
SAT NIGHT AND THEN DISSIPATES. A 987 MB LOW DEVELOPS SUN AFTERNOON
NEAR 57N 154W.

$$

PKZ351-031500-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 PM AKDT FRI SEP 2 2011

...GALE WARNING TONIGHT...

.TONIGHT...S WIND 30 TO 45 KT. SEAS 17 TO 21 FT. RAIN.
.SAT...S WIND 30 KT DIMINISHING TO 20 KT IN THE AFTERNOON. SEAS
15 FT. 
.SAT NIGHT...SW WIND 20 KT. SEAS 10 FT. 
.SUN...S WIND 20 KT. SEAS 8 FT. 
.SUN NIGHT...SE WIND 30 KT. SEAS 9 FT. 
.MON...SE WIND 45 KT. SEAS 17 FT. 
.TUE...SE WIND 30 KT. SEAS 19 FT. 
.WED...S WIND 30 KT. SEAS 17 FT.  

$$

PKZ352-031500-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 PM AKDT FRI SEP 2 2011

...GALE WARNING TONIGHT...

.TONIGHT...SW WIND 25 TO 35 KT. SEAS 19 FT SUBSIDING TO 14 FT AFTER
MIDNIGHT. RAIN.
.SAT...SW WIND 25 KT. SEAS 13 FT. 
.SAT NIGHT...SW WIND 20 KT. SEAS 10 FT. 
.SUN...S WIND 20 KT. SEAS 8 FT. 
.SUN NIGHT...SE WIND 30 KT. SEAS 11 FT. 
.MON...SE WIND 40 KT. SEAS 14 FT. 
.TUE...S WIND 30 KT. SEAS 18 FT. 
.WED...SW WIND 30 KT. SEAS 17 FT.  

$$

063 
FZAK61 PAFC 031122
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT SAT SEP 3 2011

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.

PKZ399-040300-
400 AM AKDT SAT SEP 3 2011
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A 997 MB LOW AT 58N 151W WILL MOVE TO 59N 150W LATE TONIGHT THEN
DISSIPATE SUN AFTERNOON. A 990 MB LOW AT 56N 156W LATE SUN MORNING
WILL MOVE TO 56N 153W AT 979 MB LATE SUN NIGHT. 
$$

PKZ351-040300-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 AM AKDT SAT SEP 3 2011

.TODAY...S WIND 25 KT. SEAS 14 FT. RAIN.
.TONIGHT...SW WIND 20 KT. SEAS 10 FT. 
.SUN...S WIND 20 KT. SEAS 8 FT. RAIN.
.SUN NIGHT...SE WIND 35 KT. SEAS 13 FT. 
.MON...E WIND 50 KT. SEAS 20 FT. 
.TUE...SE WIND 30 KT. SEAS 22 FT. 
.WED...S WIND 35 KT. SEAS 18 FT.  
$$

PKZ352-040300-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 AM AKDT SAT SEP 3 2011

.TODAY...SW WIND 25 KT. SEAS 12 FT. 
.TONIGHT...SW WIND 20 KT. SEAS 9 FT. 
.SUN...S WIND 25 KT. SEAS 10 FT. RAIN.
.SUN NIGHT...SE WIND 35 KT. SEAS 15 FT. 
.MON...SE WIND 45 KT. SEAS 18 FT. 
.TUE...SE WIND 30 KT. SEAS 22 FT. 
.WED...S WIND 35 KT. SEAS 18 FT.  

$$

SOUTHCENTRAL AND SOUTHWEST ALASKA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ANCHORAGE AK
200 PM AKDT WED AUG 31 2011

.MODEL DISCUSSION...

MODELS ARE IN GOOD AGREEMENT THROUGH THE SHORT TERM. THE EUROPEAN
(EC) MODEL SEEMS TO HAVE SCORED THE COUP IN SHOWING A PHASING
SOLUTION WITH LOW PRESSURE APPROACHING THE GULF OF ALASKA FROM THE
SOUTHWEST ON FRIDAY...AS THE OTHER MODELS HAVE NOW COME IN LINE WITH
ITS SOLUTION. THE RESULT WILL BE A STRONGER LOW IN THE GULF OF ALASKA
FRIDAY WITH A LARGE SWATH OF GALE FORCE WINDS AND THE POSSIBLE
DEVELOPMENT OF A FAIRLY STRONG BARRIER JET ALONG THE NORTH GULF
COAST.

.ANALYSIS AND UPPER LEVELS...

A LARGE NEGATIVELY TILTED TROUGH RESIDES FROM SOUTHWEST ALASKA SOUTH
AND EAST INTO THE NORTHWEST GULF OF ALASKA...WITH A WEAK SURFACE LOW
HAVING DEVELOPED THIS MORNING IN THE NORTHERN GULF AND MOVING EAST
TOWARDS THE PANHANDLE THROUGH TONIGHT. AS THE TROUGH SPLITS AND THE
FLOW ALOFT BECOMES MORE NORTHERLY ON THE BACKSIDE...WE SHOULD START
TO SEE THE RAIN COME TO END GRADUALLY THIS EVENING. A RAPIDLY MOVING
TRANSITORY RIDGE PASSES OVER SOUTHCENTRAL ALASKA THURSDAY...BEFORE
THE NEXT SYSTEM (THE AFOREMENTIONED PHASING SOLUTION) GETS GOING IN
THE GULF OF ALASKA LATE THURSDAY NIGHT THROUGH FRIDAY. THIS LOW
PRESSURE SYSTEM SLOWLY WEAKENS INTO SATURDAY IN THE GULF WHILE YET
ANOTHER SYSTEM DROPS SOUTH AND EAST INTO THE NORTHERN BERING FROM
EASTERN SIBERIA.

.SHORT TERM FORECAST...

SOUTHCENTRAL ALASKA...

DEVELOPING LOW PRESSURE IN THE NORTHERN GULF HAS HELPED INITIATE A
BARRIER JET ALONG THE NORTH GULF COAST INTO PRINCE WILLIAM SOUND THIS
MORNING. EXPECT THESE WINDS TO DIMINISH RAPIDLY THIS EVENING AND TURN
NORTHWESTERLY AS THE SURFACE LOW MOVES RAPIDLY TOWARDS THE PANHANDLE.
STRONG NORTHWESTERLY FLOW ON THE BACK SIDE OF THE LOW WILL BRING A
LARGE AREA OF GALES FROM THE BARREN ISLAND WATERS THROUGH THE WESTERN
OFFSHORE ZONES TONIGHT. OVER THE SOUTHCENTRAL MAINLAND...RAIN WILL
TAPER TO SCATTERED SHOWERS ACROSS THE COOK INLET AND SUSITNA VALLEY
REGIONS THIS EVENING...WITH PARTIAL CLEARING OCCURRING TOWARDS
MORNING.

AFTER A TRANQUIL DAY OF PARTLY SUNNY SKIES OVER THE REGION ON
THURSDAY...THE NEXT SYSTEM BEGINS TO AFFECT THE REGION LATE THURSDAY
NIGHT THROUGH FRIDAY WITH RAIN ALONG THE COAST...AND SCATTERED
SHOWERS INLAND. STRONG GALES WILL BE POSSIBLE ALONG THE NORTHERN GULF
WITH THE POSSIBLE DEVELOPMENT OF A BARRIER JET.

SOUTHWEST ALASKA...

SHOWERS WILL TAPER OFF THROUGH THIS EVENING...WITH A BRIEF PERIOD OF
TRANQUIL WEATHER BEFORE THE NEXT SYSTEM MOVES ONSHORE IN THE DELTA
REGION BY MIDNIGHT AND THEN MOVES EAST ACROSS THE REGION BEFORE
TAPERING OFF FRIDAY EVENING.

BERING SEA/ALEUTIANS...

LOW PRESSURE IS ENTERING THE NORTHERN BERING THIS AFTERNOON AND IS
PUSHING A GALE FORCE FRONT ACROSS THE BERING THROUGH TONIGHT. HIGH
PRESSURE SWIFTLY MOVES ACROSS THE BERING FRIDAY AS ANOTHER WEATHER
FRONT MOVES INTO THE WESTERN BERING FRIDAY NIGHT.

.LONG TERM FORECAST...

GLOBAL MODELS CONTINUE TO HINT AT THE FAST ZONAL PATTERN OF THIS WEEK
EVOLVING INTO A MUCH MORE HIGHLY AMPLIFIED WEATHER PATTERN BY EARLY
NEXT WEEK. THOUGH THERE ARE DIFFERENCES IN HOW THIS EVOLUTION COMES
ABOUT...THE RESULT APPEARS TO BE A LARGE AND STRONG LOW PRESSURE
DEVELOPING NEAR OR SOUTH OF THE ALASKA PENINSULA AND EVENTUALLY
MOVING TOWARDS THE GULF OF ALASKA. THIS WOULD RESULT IN STRONG WINDS
TO AT LEAST GALE FORCE OVER A LARGE PORTION OF THE GULF THE EARLY OR
MIDDLE PART OF NEXT WEEK...WHILE HIGH PRESSURE RIDGES BUILD TO THE
NORTH FROM THE WESTERN BERING ACROSS TO WESTERN NORTH AMERICA.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...GALES...120 130 170 172 175 179 180 185
FIRE WEATHER...NONE.

29 AUG 11