Storm Warning 128, NWS Anchorage, AK

000 
FZAK61 PAFC 262311
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT WED AUG 26 2009

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.

PKZ399-271400-
400 PM AKDT WED AUG 26 2009
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A 985 MB NORTH PACIFIC LOW NEAR 50N 145W WED NIGHT WILL MOVE TO NEAR
55N 148W WITH NO CHANGE IN STRENGTH THU AFTERNOON. THIS LOW WILL THEN
MOVE TO NEAR 55N 155W AT 990 MB FRI AFTERNOON.
$$

PKZ351-271400-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 PM AKDT WED AUG 26 2009

...STORM WARNING THURSDAY...

.TONIGHT...SE WIND 30 KT. SEAS 12 FT. 
.THU...E WIND 40 KT INCREASING TO 50 KT IN THE AFTERNOON. SEAS
18 FT. RAIN.
.THU NIGHT...SE WIND 30 KT. SEAS 18 FT. RAIN.
.FRI...SE WIND 25 KT. SEAS 15 FT. 
.FRI NIGHT...E WIND 15 KT. SEAS 14 FT. 
.SAT...E WIND 25 KT. SEAS 11 FT. 
.SUN...NE WIND 20 KT. SEAS 10 FT. 
.MON...N WIND 15 KT. SEAS 6 FT.  

$$

PKZ352-271400-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 PM AKDT WED AUG 26 2009

...GALE WARNING THROUGH THURSDAY...

.TONIGHT...E WIND 35 KT. SEAS 15 FT. 
.THU...NE WIND 35 KT. SEAS 17 FT. RAIN.
.THU NIGHT...S WIND 25 KT. SEAS 16 FT. RAIN.
.FRI...S WIND 25 KT. SEAS 14 FT. 
.FRI NIGHT...E WIND 20 KT. SEAS 12 FT. 
.SAT...N WIND 20 KT. SEAS 10 FT. 
.SUN...N WIND 25 KT. SEAS 8 FT. 
.MON...NW WIND 20 KT. SEAS 6 FT.  

$$

000 
FZAK61 PAFC 271145
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT THU AUG 27 2009

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.

PKZ399-280200-
400 AM AKDT THU AUG 27 2009
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A 986 MB LOW AT 54N 144W MOVES TO 54N 154W LATE FRIDAY MORNING AT 990
MB AND THEN DISSIPATES. A NORTH PACIFIC LOW MOVES TO 53N 147W
SATURDAY MORNING AT 1000 MB AND INTO THE GULF SATURDAY EVENING.
$$

PKZ351-280200-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 AM AKDT THU AUG 27 2009

...STORM WARNING TODAY...

.TODAY...E WIND 40 KT INCREASING TO 50 KT IN THE AFTERNOON. SEAS
17 FT. RAIN.
.TONIGHT...SE WIND 30 KT. SEAS 17 FT. RAIN.
.FRI...S WIND 25 KT. SEAS 15 FT. 
.FRI NIGHT...E WIND 15 KT. SEAS 12 FT. 
.SAT...NE WIND 20 KT. SEAS 11 FT. 
.SUN...N WIND 20 KT. SEAS 8 FT. 
.MON...VARIABLE WIND 10 KT. SEAS 5 FT.  

$$

PKZ352-280200-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 AM AKDT THU AUG 27 2009

...GALE WARNING TODAY...

.TODAY...NE WIND 40 KT. SEAS 16 FT. 
.TONIGHT...S WIND 30 KT. SEAS 16 FT. 
.FRI...S WIND 25 KT. SEAS 15 FT. 
.FRI NIGHT...E WIND 20 KT. SEAS 12 FT. 
.SAT...N WIND 20 KT. SEAS 10 FT. 
.SUN...N WIND 20 KT. SEAS 8 FT. 
.MON...N WIND 15 KT. SEAS 5 FT.  

$$

000 
FZAK61 PAFC 272300
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT THU AUG 27 2009

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.

PKZ399-281400-
400 PM AKDT THU AUG 27 2009
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A 982 MB LOW NEAR 55N 147W WILL MOVE TO 56N 152W THU NIGHT. 
THIS LOW WILL THEN TRACK SOUTHWARD FRI AND MERGE WITH A NORTH 
PACIFIC LOW FRI NIGHT. THIS NEW LOW WILL MOVE TO 55N 146W 
SAT AFTERNOON.

$$

PKZ351-281400-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 PM AKDT THU AUG 27 2009

...GALE WARNING TONIGHT...

.TONIGHT...NE WIND 35 KT BECOMING E TO SE 20 TO 30 KT AFTER 
MIDNIGHT. SEAS 13 TO 17 FT. RAIN.
.FRI...S WIND 30 KT BECOMING SE 20 KT IN THE AFTERNOON. SEAS 16 FT.
RAIN.
.FRI NIGHT...SE WIND 15 KT. SEAS 12 FT. RAIN.
.SAT...E WIND 20 KT. SEAS 10 FT. 
.SAT NIGHT...N WIND 15 KT. SEAS 9 FT. 
.SUN...NW WIND 15 KT. SEAS 8 FT. 
.MON...NW WIND 15 KT. SEAS 6 FT. 
.TUE...SW WIND 15 KT. SEAS 5 FT.  

$$

PKZ352-281400-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 PM AKDT THU AUG 27 2009

...GALE WARNING TONIGHT...

.TONIGHT...N TO E WIND 20 TO 35 KT BECOMING S TO E WIND 20 TO 30 KT
LATE EVENING. SEAS 15 FT. RAIN.
.FRI...S WIND 25 KT. SEAS 14 FT. RAIN. 
.FRI NIGHT...SE WIND 20 KT. SEAS 12 FT. RAIN.
.SAT...NE WIND 20 KT. SEAS 10 FT. 
.SAT NIGHT...NW WIND 20 KT. SEAS 10 FT. 
.SUN...NW WIND 20 KT. SEAS 8 FT. 
.MON...NW WIND 20 KT. SEAS 6 FT. 
.TUE...W WIND 15 KT. SEAS 5 FT.  

$$

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
400 AM AKDT WED AUG 26 2009

CORRECTION FOR TYPO

.MODEL DISCUSSION...GFS AND NAM 00Z RUNS IN GOOD AGREEMENT THROUGH 60
HOURS ON PRIMARY WEATHER FEATURES.  THOSE FEATURES ARE A NORTH
PACIFIC LOW THAT MOVES INTO THE SOUTHERN GULF OF AK THURSDAY AND
MOVES NORTHWESTWARD TO THE SOUTHERN TIP OF KODIAK ISLAND ON FRIDAY
AFTERNOON. A CENTRAL ALEUTIAN LOW MOVES WELL SOUTH OF COLD BAY ON
FRIDAY AS IT STRENGTHENS TO 976 MB. A RIDGE OF HIGH PRESSURE FORMS
OVER THE WESTERN ALEUTIANS AND CENTRAL BERING SEA WEDNESDAY NIGHT AND
PERSISTS THROUGH SUNDAY AS IT SLOWLY MOVES TO THE SOUTHEAST.
FORECASTERS THIS MORNING FAVORING GFS SOLUTION IN THEIR VARIOUS
PRODUCTS.

.ANALYSIS AND UPPER LEVELS...MAIN UPPER LEVEL ENERGY IS ASSOCIATED
WITH THE CENTRAL ALEUTIAN LOW WHICH DIGS INTO THE NORTH PACIFIC LATER
IN THE WEEK WHICH IN TURN ALLOWS FOR THE DEVELOPMENT OF SURFACE LOW
IN THE GULF OF ALASKA OVER THE WEEKEND.  HIGH AMPLITUDE RIDGE OVER
THE NORTHWEST COAST OF NO. AM. WILL BLOCK ANY MOVEMENT FURTHER
EASTWARD.

.SHORT TERM FORECAST...EXPECTING MOISTURE TO MOVE INTO SOUTHCENTRAL
WEDNESDAY MORNING AS A RESULT OF SOUTHEAST FLOW ALOFT.  SOUTHWEST
ZONES SHOULD NOT EXPECT PRECIPITATION FROM CURRENT CENTRAL ALEUTIAN
STORM WITH THE EXCEPTION OF THE NORTHERN AK PEN ON LATE WEDNESDAY AND
THURSDAY.  KODIAK ISLAND CAN EXPECT RAIN BEGINNING WEDNESDAY NIGHT
AND EXTENDING THROUGH FRIDAY NIGHT...STRONG NE WINDS THURSDAY
AFTERNOON THROUGH FRIDAY MORNING.

.LONG TERM FORECAST...WITH A GULF OF ALASKA LOW ON THE WEEKEND AND
RIDGE OF HIGH PRESSURE OVER THE CENTRAL BERING MOST OF THE ACTIVE
WEATHER WILL BE IN SOUTHCENTRAL. RAIN OR SHOWERS IN COASTAL AREAS OF
SOUTHCENTRAL BUT GENERALLY CLOUDY ON SATURDAY BECOMING MOSTLY SUNNY
OVER MUCH OF THE AREA ON SUNDAY.

ON MONDAY A TROUGH FORMS OVER THE BERING SEA AND HENCE TRANSPORTS
MOISTURE INTO THE SOUTHWEST ZONES BEGINNING MONDAY AFTERNOON.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE
MARINE...GALES 155 165 171 176 179 138  STRM 175 172 120 130 132
FIRE WEATHER...GONE UNTIL NEXT YEAR

JMP AUG 09