Gale Warning 341, NWS Anchorage, AK

000 
FZAK62 PAFC 012305
OFFALU

OFFSHORE WATERS FORECAST
NATIONAL WEATHER SERVICE ANCHORAGE AK
400 PM AKDT WED APR 1 2009

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.

PKZ499-021400-
400 PM AKDT WED APR 1 2009
.SYNOPSIS FOR CENTRAL BERING SEA...

A 1007 MB LOW NEAR 59N 171W WILL MOVE ONSHORE NEAR 60N 164W AT 1008
MB WED NIGHT. HIGH PRESSURE OVER THE WESTERN BERING WILL MOVE TO THE
CENTRAL BERING BY FRI.

$$

PKZ411-021400-
BERING SEA OFFSHORE WEST OF 180 AND EAST OF THE INTERNATIONAL
DATELINE
400 PM AKDT WED APR 1 2009

.TONIGHT...NW WIND 20 KT. SEAS 7 FT. FREEZING SPRAY. 
.THU...W WIND 15 KT. SEAS 5 FT. FREEZING SPRAY. 
.THU NIGHT...SW WIND 15 KT. SEAS 4 FT. FREEZING SPRAY. 
.FRI...S WIND 30 KT. SEAS 7 FT. 
.FRI NIGHT...SE WIND 35 KT. SEAS 12 FT. 
.SAT...SE WIND 30 KT. SEAS 15 FT. 
.SUN...N WIND 25 KT. SEAS 15 FT. 
.MON...NW WIND 25 KT. SEAS 13 FT.  

$$

PKZ412-021400-
BERING SEA OFFSHORE 171W TO 180 AND NORTH OF 56N
400 PM AKDT WED APR 1 2009

.TONIGHT...N WIND 20 KT. SEAS 8 FT. FREEZING SPRAY. 
.THU...NW WIND 20 KT. SEAS 6 FT. FREEZING SPRAY. 
.THU NIGHT...NW WIND 20 KT. SEAS 4 FT. FREEZING SPRAY. 
.FRI...SW WIND 15 KT. SEAS 4 FT. 
.FRI NIGHT...S WIND 25 KT. SEAS 7 FT. 
.SAT...SE WIND 35 KT. SEAS 12 FT. 
.SUN...SE WIND 25 KT. SEAS 14 FT. 
.MON...NW WIND 20 KT. SEAS 10 FT.  

$$

PKZ413-021400-
BERING SEA OFFSHORE 171W TO 180 AND SOUTH OF 56N
400 PM AKDT WED APR 1 2009

.TONIGHT...W WIND 25 KT BECOMING N 25 KT DURING THE EVENING. SEAS 11
FT. FREEZING SPRAY. 
.THU...N WIND 30 KT. SEAS 11 FT. FREEZING SPRAY. 
.THU NIGHT...NW WIND 30 KT DIMINISHING TO 20 KT AFTER MIDNIGHT. SEAS
11 FT. FREEZING SPRAY. 
.FRI...SW WIND 20 KT. SEAS 5 FT. 
.FRI NIGHT...SE WIND 35 KT. SEAS 10 FT. 
.SAT...S WIND 35 KT. SEAS 13 FT. 
.SUN...S WIND 25 KT. SEAS 13 FT. 
.MON...W WIND 25 KT. SEAS 12 FT.  

$$

PKZ414-021400-
BERING SEA OFFSHORE EAST OF 171W
400 PM AKDT WED APR 1 2009

...GALE WARNING THURSDAY AND THURSDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING THURSDAY NIGHT...

.TONIGHT...SW WIND 30 KT BECOMING NW 20 KT AFTER MIDNIGHT. SEAS IN
ICE FREE WATERS 12 FT. SNOW.
.THU...N WIND 35 KT. SEAS IN ICE FREE WATERS 10 FT. FREEZING SPRAY. 
.THU NIGHT...N WIND 35 KT. SEAS IN ICE FREE WATERS 10 FT. HEAVY
FREEZING SPRAY. 
.FRI...NW WIND 25 KT. SEAS IN ICE FREE WATERS 7 FT. 
.FRI NIGHT...NE WIND 20 KT. SEAS IN ICE FREE WATERS 4 FT. 
.SAT THROUGH SUN...SE WIND 30 KT. SEAS IN ICE FREE WATERS 9 FT. 
.MON...SW WIND 25 KT. SEAS IN ICE FREE WATERS 10 FT.  

$$

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
500 AM AKDT WED APR 1 2009

.ANALYSIS AND UPPER LEVELS...
IN THE UPPER LEVELS...A TROF IS DRAPED OVER THE WESTERN BERING AND
ALEUTIANS NOSING TO THE EAST. A SHORTWAVE IS MOVING EAST ACROSS THE
KUSKOWIM AND SUSITNA VALLEYS. ZONAL FLOW PREDOMINANT FOR THE
REMAINDER OF THE AOR. A FILLING 1000 MB LOW IN THE BERING SEA WEST OF
SAINT PAUL IS MOVING EAST TODAY. A 1013 MB LOW ABOUT 860 NM SOUTH OF
ADAK IS DEVELOPING TODAY MOVING NORTHEAST.

.MODEL DISCUSSION...
THE GFS AND NAM ARE PERFORMING SATISFACTORILY AND WERE INCORPORATED
INTO THE MORNING PACKAGE. MODELS HAVE DECENT AGREEMENT HANDLING
SYSTEM IN THE BERING SEA AS IT ADVANCES EAST. MODELS ARE TRENDING
TOWARDS A BETTER AGREEMENT WITH INTENSITY OF LOW PROGGED TO SLIP
SOUTH OF THE ALEUTIAN CHAIN TOWARDS THE GULF OF ALASKA BY THE END OF
THE WEEK.

.SHORT TERM FORECAST...
.SOUTHCENTRAL...
PERIODS OF LIGHT SNOW WITH THE SHORTWAVE TRAVERSING THE SUSITNA
VALLEY AND TOWARDS NORTHERN COPPER RIVER BASIN TODAY. FAIR WEATHER
TODAY ELSEWHERE IN THE ZONE. AN INCREASING CHANCE OF PRECIPITATION
THURSDAY INTO FRIDAY FROM SOUTHWEST TO NORTHEAST ACROSS THE ZONE FROM
MOISTURE AHEAD OF THE BERING LOW AND DEEPENING NORTH PACIFIC LOW.
PRECIPITATION LOOKS TO BE A MIX OF RAIN AND SNOW OVER KODIAK ISLAND
WITH ALL SNOW ELSEWHERE.

.SOUTHWEST...
CHANCE OF SNOW OVER THE KUSKOWIM DELTA AND BRISTOL BAY ZONE THIS
EVENING INTO THURSDAY AS MOISTURE FROM BERING LOW APPROACHES. RAIN
AND SNOW ACROSS THE AKPEN FROM THIS SAME FEATURE. THE NEXT PACIFIC
LOW WILL KEEP THE THREAT OF SNOW AROUND S BRISTOL BAY AND THE AKPEN
INTO EARLY FRIDAY.

.BERING SEA AND ALEUTIANS...
SCATTERED SNOW SHOWERS ACROSS THE WESTERN ALEUTIANS AND PRIBILOFFS
FROM THE BERING LOW. NUMEROUS SNOW SHOWERS WITH NORTH PACIFIC LOW
OVER THE CENTRAL ANDE EASTERN ALEUTIANS THURSDAY.

.LONG TERM FORECAST...
UNSETTLED WEATHER CONTINUES...AS LOWS MOVE FROM THE NORTH PACIFIC
ACROSS THE ALEUTIAN CHAIN...EVENTUALLY IMPACTING THE MAINLAND. UPPER
LVL PATTERN BECOMING HIGHER AMPLITUDE TOWARDS THE WEEKEND.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE
MARINE...GALES...414 165 170 171
         HEAVY FREEZING SPRAY...129 130 165
FIRE WEATHER...

*** APR 09