Gale Warning 436, NWS Anchorage, AK

554 
FZAK61 PAFC 212256
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT THU MAY 21 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.

PKZ399-221400-
400 PM AKDT THU MAY 21 2009
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A 1018 MB LOW NEAR 57N 146W MOVES OVER KODIAK ISLAND AND WEAKENS
TONIGHT.  A 1014 MB LOW NEAR 53N 156W MOVES TO 54N 150W AND
INTENSIFIES TO 1002 MB SATURDAY AFTERNOON.
 
$$

PKZ351-221400-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 PM AKDT THU MAY 21 2009

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

.TONIGHT...S WIND 20 KT. SEAS 6 FT. 
.FRI...E WIND 25 KT INCREASING TO 35 KT IN THE AFTERNOON. SEAS
10 FT. 
.FRI NIGHT...E WIND 35 KT. SEAS 12 FT. RAIN.
.SAT...E WIND 30 KT. SEAS 11 FT. 
.SAT NIGHT...E WIND 25 KT. SEAS 10 FT. 
.SUN...E WIND 20 KT. SEAS 9 FT. 
.MON...E WIND 20 KT. SEAS 7 FT. 
.TUE...SE WIND 15 KT. SEAS 6 FT.  

$$

PKZ352-221400-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 PM AKDT THU MAY 21 2009

...GALE WARNING FRIDAY...

.TONIGHT...VARIABLE WIND 10 KT BECOMING SE 25 KT AFTER MIDNIGHT. SEAS
9 FT. 
.FRI...E WIND 35 KT. SEAS 11 FT. RAIN.
.FRI NIGHT...E WIND 30 KT DIMINISHING TO 20 KT AFTER MIDNIGHT. SEAS
11 FT. RAIN.
.SAT...E WIND 20 KT. SEAS 8 FT. 
.SAT NIGHT...SE WIND 20 KT. SEAS 8 FT. 
.SUN...E WIND 20 KT. SEAS 7 FT. 
.MON...E WIND 20 KT. SEAS 7 FT. 
.TUE...VARIABLE WIND 10 KT. SEAS 4 FT.  

$$

000 
FZAK61 PAFC 221140
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT FRI MAY 22 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.

PKZ399-230200-
400 AM AKDT FRI MAY 22 2009
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A 1009 MB LOW NEAR 51N 152W WILL BECOME A 1002 MB LOW NEAR 
55N 150W SAT NIGHT.
$$

PKZ351-230200-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 AM AKDT FRI MAY 22 2009

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE WIND 20 KT INCREASING TO E 25 TO 35 KT IN THE AFTERNOON. 
SEAS 4 FT BUILDING TO 9 FT. RAIN.
.TONIGHT...E WIND 40 KT. SEAS 13 FT. RAIN.
.SAT...E WIND 30 KT. SEAS 11 FT. RAIN.
.SAT NIGHT...E WIND 25 KT. SEAS 11 FT. 
.SUN...E WIND 20 KT. SEAS 8 FT. 
.MON...E WIND 20 KT. SEAS 7 FT. 
.TUE...E WIND 15 KT. SEAS 6 FT.  

$$

PKZ352-230200-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF 144W
400 AM AKDT FRI MAY 22 2009

...GALE WARNING THROUGH TONIGHT...

.TODAY...E WIND 25 KT INCREASING TO 40 KT IN THE AFTERNOON. 
SEAS 6 FT BUILDING TO 11 FT. RAIN.
.TONIGHT...N TO E WIND 35 KT DIMINISHING TO 15 TO 25 KT 
AFTER MIDNIGHT. SEAS 12 FT. RAIN.
.SAT...N TO E WIND 25 KT. SEAS 10 FT. 
.SAT NIGHT...NE TO SE WIND 25 KT. SEAS 9 FT. 
.SUN...E WIND 25 KT. SEAS 8 FT. 
.MON...E WIND 20 KT. SEAS 7 FT. 
.TUE...E WIND 15 KT. SEAS 6 FT.  

$$

510 
FZAK61 PAFC 222245
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT FRI MAY 22 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.

PKZ399-231400-
400 PM AKDT FRI MAY 22 2009
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A 1004 MB LOW NEAR 54N 149W MOVES TO 52N 152W AND WEAKENS TO 1006 MB
SUNDAY AFTERNOON. 
$$

PKZ351-231400-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 PM AKDT FRI MAY 22 2009

...GALE WARNING TONIGHT...

.TONIGHT...E WIND INCREASING TO 40 KT THIS EVENING. SEAS 14 FT. RAIN.
.SAT...E WIND 30 KT. SEAS 12 FT. RAIN.
.SAT NIGHT...SE WIND 25 KT. SEAS 11 FT. 
.SUN...E WIND 20 KT. SEAS 8 FT. 
.SUN NIGHT...E WIND 15 KT. SEAS 5 FT. 
.MON...E WIND 20 KT. SEAS 7 FT. 
.TUE...E WIND 15 KT. SEAS 5 FT. 
.WED...SE WIND 15 KT. SEAS 5 FT.  

$$

PKZ352-231400-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF
144W
400 PM AKDT FRI MAY 22 2009

...GALE WARNING TONIGHT...

.TONIGHT...E WIND 35 KT BECOMING SE 25 KT AFTER MIDNIGHT. SEAS
12 FT. RAIN.
.SAT...E WIND 25 KT. SEAS 10 FT. 
.SAT NIGHT...SE WIND 25 KT. SEAS 9 FT. 
.SUN...E WIND 25 KT. SEAS 9 FT. 
.SUN NIGHT...E WIND 15 KT. SEAS 5 FT. 
.MON...NE WIND 20 KT. SEAS 7 FT. 
.TUE...E WIND 15 KT. SEAS 5 FT. 
.WED...VARIABLE WIND 10 KT. SEAS 4 FT.  

$$

000 
FZAK61 PAFC 231124
OFFAER

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 AM AKDT SAT MAY 23 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.

PKZ399-240200-
400 AM AKDT SAT MAY 23 2009
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A 1002 MB LOW NEAR 56N 150W WILL BECOME A 1007 MB LOW NEAR 
52N 150W SUN NIGHT.  
$$

PKZ351-240200-
GULF OF ALASKA OFFSHORE NORTH OF 57N AND WEST OF 144W
400 AM AKDT SAT MAY 23 2009

.TODAY...E WIND 20 TO 30 KT. SEAS 12 FT. RAIN.
.TONIGHT...E WIND 15 TO 25 KT. SEAS 10 FT. 
.SUN...NE WIND 10 TO 20 KT. SEAS 8 FT. 
.SUN NIGHT...E WIND 15 TO 25 KT. SEAS 9 FT. 
.MON...NE WIND 15 KT. SEAS 8 FT. 
.TUE...NW WIND 15 KT. SEAS 5 FT. 
.WED...SE WIND 20 KT. SEAS 6 FT.  

$$

PKZ352-240200-
GULF OF ALASKA OFFSHORE SOUTH OF 57N NORTH OF 55N AND WEST OF 144W
400 AM AKDT SAT MAY 23 2009

.TODAY...NE TO SE WIND 15 TO 25 KT. SEAS 9 FT. 
.TONIGHT...NE TO SE WIND 15 TO 25 KT. SEAS 9 FT. RAIN.
.SUN...E WIND 10 TO 20 KT. SEAS 7 FT. RAIN SHOWERS. 
.SUN NIGHT...NE WIND 15 KT. SEAS 7 FT. 
.MON...E WIND 15 KT. SEAS 7 FT. 
.TUE...N WIND 15 KT. SEAS 5 FT. 
.WED...S WIND 15 KT. SEAS 5 FT.  

$$

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
500 PM AKDT WED MAY 20 2009

.MODEL DISCUSSION...MODEL INITIALIZATIONS REASONABLE. SYNOPTIC
PATTERNS SIMILAR THROUGH THE WEEKEND. MODELS TEND TO DIFFER ON THE
INTENSITY OF THE UPPER CENTER AND ASSOCIATED SURFACE CENTER MOVING
INTO THE GULF THU NIGHT. THE GFS IS THE MORE AGGRESSIVE...HOWEVER THE
LATEST ECMWF IS TRENDING TOWARD A DEEPER CENTER. OVERALL...WENT WITH
GFS PATTERN AND BLENDED PRESSURES WITH 12Z ECMWF TO MODERATE
PRESSURES OF GULF CENTER.

.UPPER LEVELS...
A WEAK BLOCKING PATTERN SETS UP OVER THE REGION THU AS THE LOW CENTER
CURRENTLY ALONG THE SW COAST MOVES TO THE GULF AND HIGH PRESSURE
BUILDS WEST OUT OF BRITISH COLUMBIA. CUT-OFF CENTER PERSISTS OVER THE
GULF THROUGH THE WEEKEND DURING WHICH IT INTENSIFIES THROUGH SAT THEN
SLOWLY WEAKENS. THE BERING SEA RIDGE IS FLATTENED AS SHORT WAVE MOVES
SE ACROSS THE CENTRAL BERING SEA THU NIGHT. RIDGE REBUILDS OVER THE
BERING SEA FRI/SAT.

.SHORT TERM FORECAST...
.EAST...PATTERN HAS SUMMER LOOK. THERMAL TROUGH OVER THE INTERIOR
INTENSIFIES INTO THE WEEKEND AND HIGH PRESSURE PERSISTS ALONG THE
NORTH GULF COAST. PRESSURE GRADIENTS LIKELY TO PRODUCE BRISK
MESOSCALE WINDS THROUGH THE COPPER RIVER BASIN AND SOUTHCENTRAL THU
AND FRI WITH INTENSIFICATION OF THE INTERIOR TROUGH DURING THE
AFTERNOON AND EVENING HOURS. RED FLAG CONDITIONS LIKELY IN ZONES 111
AND POSSIBLY 141 THU WITH GUSTLY WINDS AND AFTERNOON AND EVENING RH
BELOW 30 PERCENT. RED FLAG CONDITIONS ARE NOT EXPECTED IN THESE ZONES
WITH INTRUSION OF LOW LEVEL MOISTURE AND SLIGHTLY COOLER TEMPS FRI.
CONDITIONS BECOME MORE UNSTABLE THU AND FRI OVER THE COPPER RIVER
BASIN AND INTERIOR SOUTHCENRAL...SO PROB WILL SEE AFTERNOON AND
EVENING CONVECTION...ANY THUNDERSTORMS LIKELY TO BE UP ALONG THE
ALASKA RANGE AND OVER THE INTERIOR.

WEAK WAVE OVER THE SE GULF MOVES TO OVER KODIAK ISLAND THU NIGHT AND
WEAKENS. MOISTURE WITH ASSOCIATED WEAK FRONTAL ZONE BRINGS A CHANCE
OF RAIN/SHOWERS TO THE KENAI PEN AND PORTIONS OF THE NORTH GULF THU.

.SOUTHWEST MAINLAND...WEAK LOW ALONG THE DELTA COAST MOVES SOUTH OF
THE AK PEN TONIGHT. LIGHT RAIN/SNOW SHOWERS WITH STRATUS LIKELY
THROUGH TONIGHT ALONG THE COASTS. STRATUS SHOULD BE BREAKING OVER
BRISTOL BAY ON THU/FRI WITH ONSET OF SYNOPTIC SCALE OFFSHORE FLOW.
CONDITIONS WILL BECOME MORE UNSTABLE OVER THE KUSKOKWIM VALLEY THU
AND FRI WITH STRENGTHENING INTERIOR THERMAL TROUGH. GENERAL
AFTERNOON/EVENING SHOWERS ARE EXPECTED THU...MAY SEE THUNDERSTORMS
FRI AFTERNOON AND EVENING.

.BERING SEA/ALEUTIANS/AK PEN...BERING SEA RIDGE FLATTENS AS WEAKENING
FRONT SHIFTS EAST AND A OPEN WAVE MOVES TO NEAR THE EASTERN ALEUTIANS
THU AFTERNOON. RIDGE REBUILDS OVER THE BERING SEA FRI AND SAT.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...NONE.
FIRE WEATHER...RED FLAG WARNINGS 111 AND 141.

RMC MAY 09