593  
FZAK80 PAFC 201929  
ICEAFC  
 
SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS  
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA  
300 PM AKST FRIDAY 19 JANUARY 2018  
 
FORECAST VALID...WEDNESDAY 24 JANUARY 2018  
 
ANALYSIS CONFIDENCE...HIGH TO MODERATE  
 
SYNOPSIS...A TROUGH OF LOW PRESSURE OVER THE BEAUFORT WILL LIFT INTO  
THE ARCTIC THROUGH THE WEEKEND AND DISSIPATE. HIGH PRESSURE WILL  
BEGIN TO REBUILD INTO THE ARCTIC AND CENTRAL BERING SEA THROUGH  
WEDNESDAY.  
 
-ARCTIC OCEAN-  
-BEAUFORT SEA-  
-CHUKCHI SEA-  
-BERING SEA-  
PKZ200-NORTON SOUND-  
PKZ215-KOTZEBUE SOUND-  
PKZ220-WALES TO CAPE THOMPSON-  
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-  
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-  
PKZ235-POINT FRANKLIN TO CAPE HALKETT-  
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-  
PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-  
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-  
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-  
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-  
 
ICE COVERED.  
 
-BERING SEA-  
PKZ160-BRISTOL BAY-  
PKZ180-KUSKOKWIM DELTA AND ETOLIN STRAIT-  
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-  
PKZ210-DALL POINT TO WALES-  
 
THE MAIN ICE EDGE IN THE BERING SEA EXTENDS FROM NEAR GOODNEWS BAY  
TO NUNIVAK ISLAND TO 60.1N 168.75W TO 62.2N 167.6W 63.1N 173.3W AND  
CONTINUES INTO RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.  
 
FORECAST FOR THE BERING SEA (DAYS 1 THROUGH 5)...NORTHERLY WINDS  
WILL CONTINUE THROUGH THE NEXT WEEK, MAINLY OVER THE EASTERN BERING  
SEA. FURTHER GROWTH OF NEW ICE CAN BE EXPECTED ALONG THE ICE EDGE  
AS WELL AS THE ICE EDGE MOVING SOUTHWARD 25 TO 35 NM.  
 
-COOK INLET-  
PKZ130-WEST OF BARREN ISLANDS INCLUDING KAMISHAK BAY-  
PKZ139-COOK INLET KALGIN ISLAND TO PT. BEDE-  
PKZ140-COOK INLET NORTH OF KALGIN ISLAND-  
 
ANALYSIS CONFIDENCE...LOW  
 
SEA ICE EDGE DISCUSSION...THE MAIN ICE EDGE WITHIN COOK INLET  
EXTENDS FROM NEAR DRIFT RIVER TO KALGIN ISLAND AND EAST TOWARDS  
KENAI. THERE IS ALSO SEA ICE WITHIN PROTECTED AREAS ON THE WEST SIDE  
OF COOK INLET TO KAMISHAK BAY. THE ICE EDGE IS MAINLY OPEN WATER.  
 
FORECAST FOR COOK INLET (DAYS 1 THROUGH 5)...TEMPERATURES WILL FALL  
BELOW FREEZING BY THE END OF THE WEEK. CONTINUOUS DOWN-INLET FLOW  
MAY LEAD TO ICE BREAKING OFF AND DRIFTING SOUTHWARD INTO OPEN  
WATERS. EXPECT CONTINUED ICE GROWTH THROUGH THE WEEK.  
 
PLEASE NOTE...COOK INLET SEA ICE CHANGES SIGNIFICANTLY WITH THE  
TIDES.  
 

 
 
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