747  
FZAK80 PAFC 222245  
ICEAFC  
 
SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS  
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA  
245 PM AKDT MONDAY 22 MAY 2017  
 
FORECAST VALID...SATURDAY 27 MAY 2017  
 
ANALYSIS CONFIDENCE...HIGH  
 
SYNOPSIS...AN AREA OF LOW PRESSURE WILL MOVE ACROSS THE NORTHERN  
BERING SEA THROUGH WEDNESDAY MORNING BEFORE STALLING NEAR SAINT  
LAWRENCE ISLAND AND EVENTUALLY DISSIPATING THURSDAY MORNING. A  
SECOND LOW PRESSURE SYSTEM WILL MOVE FROM THE ALASKA INTERIOR INTO  
THE CHUKCHI SEA LATE WEDNESDAY NIGHT BEFORE STALLING OVER THE BERING  
SEA AND DISSIPATING FRIDAY NIGHT.  
 
-ARCTIC OCEAN-  
-BEAUFORT SEA-  
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-  
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-  
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-  
PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-  
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-  
PKZ235-POINT FRANKLIN TO CAPE HALKETT-  
 
ICE COVERED.  
 
-CHUKCHI SEA-  
PKZ200-NORTON SOUND-  
PKZ215-KOTZEBUE SOUND-  
PKZ220-WALES TO CAPE THOMPSON-  
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-  
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-  
 
THE MAIN ICE EDGE IN THE CHUKCHI SEA EXTENDS FROM A POINT NEAR 65.8N  
168.4W TO 66.0N 168.2W TO 66.4N 169.1W TO 67.3N 169.6W TO 67.4N  
171.4W TO 66.1N 169.6W. THE ICE EDGE IS MAINLY OPEN WATER.  
 
FORECAST THROUGH SATURDAY FOR THE CHUKCHI SEA...LIGHT NORTHEASTERLY  
WINDS WILL BEGIN TO BECOME VARIABLE TUESDAY NIGHT. WINDS WILL SHIFT  
TO THE SOUTHWEST THURSDAY MORNING AND REMAIN FROM THAT DIRECTION  
THROUGH SATURDAY. THE ICE EDGE IS EXPECTED TO MOVE TO THE WEST-  
SOUTHWEST 10 TO 15 NM THROUGH SATURDAY...WITH PIECES OF THE MAIN ICE  
PACK BREAKING OFF AND MELTING THROUGH THE FORECAST PERIOD AS THEY  
MOVE INTO WARMER WATER.  
 
-BERING SEA-  
PKZ160-BRISTOL BAY-  
PKZ165-PORT HEIDEN TO CAPE SARICHEF-  
PKZ180-KUSKOKWIM DELTA TO ETOLIN STRAIT-  
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-  
PKZ185-SAINT MATTHEW ISLAND WATERS-  
PKZ210-DALL POINT TO WALES-  
PKZ412-BERING SEA OFFSHORE 171W TO 180 AND N OF 56N-  
PKZ414-BERING SEA OFFSHORE EAST OF 171W-  
 
THE MAIN ICE EDGE IN THE BERING SEA EXTENDS FROM THE ALASKA COAST  
NEAR 64.3N 161.2W TO 63.8N 166.7W TO 64.9N 167.2W TO 65.8N 168.3W  
AND CONTINUES THROUGH THE BERING STRAIT. THERE IS ALSO SEA ICE  
PRESENT ALONG THE RUSSIAN COAST AND ON THE NORTHEAST SIDE OF SAINT  
LAWRENCE ISLAND AND ICE ALONG THE SOUTHERN PORTION OF NORTON SOUND.  
THE ICE EDGE IS MAINLY OPEN WATER.  
 
THERE IS ALSO AN ICE FLOW THAT EXTENDS NORTH FROM SAINT MATTHEW  
ISLAND FROM 61.3N 172.6W TO 61.0N 171.5W TO 61.2N 170.2W TO 61.7N  
172.3W TO 61.1N 174.7W TO 61.3N 176.8W TO 60.9N 177.2W TO 60.4N  
174.0W TO 61.3N 172.6W.  
 
ANOTHER ICE FLOW EXTENDS SOUTH TO NORTH FROM 63.1N 167.4W TO 63.3N  
166.6W TO 63.7N 167.1W TO 63.6N 168.0W TO 63.1N 167.4W.  
 
FORECAST THROUGH SATURDAY FOR THE BERING SEA...INCREASING  
SOUTHWESTERLY WINDS ARE EXPECTED WITH THE LOW MOVING ACROSS THE  
NORTHERN BERING SEA. WINDS WILL BEGIN TO SHIFT TO THE NORTHWEST  
BEHIND THE LOW ON WEDNESDAY BUT THE NORTHERN AND EASTERN BERING SEA  
WILL NOT SEE THE NORTHWESTERLY WINDS UNTIL THURSDAY. WINDS WILL THEN  
WEAKEN AND SHIFT TO THE WEST THROUGH SATURDAY. THE REMAINING BERING  
SEA ICE PACK IS EXPECTED TO CONTINUE TO SPREAD OUT AND GRADUALLY  
MELT THROUGH THE FORECAST PERIOD...WITH SOME OF THE ICE BEING  
DESTROYED BY THE ADVANCING LOW PRESSURE SYSTEM THROUGHOUT THE WEEK.  
 

 
 
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