300  
FZAK80 PAFC 202244  
ICEAFC  
 
SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS  
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA  
245 PM AKDT WEDNESDAY 20 SEPTEMBER 2017  
 
FORECAST VALID...MONDAY 25 SEPTEMBER 2017  
 
ANALYSIS CONFIDENCE...HIGH  
 
SYNOPSIS...HIGH PRESSURE WILL SIT OVER THE SOUTHERN BEAUFORT THROUGH  
SUNDAY. LOW PRESSURE NEAR THE ALASKA/CANADIAN BORDER WILL TIGHTEN  
THE GRADIENT FRIDAY AND SATURDAY. LOW PRESSURE WILL SIT OVER THE  
NORTHERN ARCTIC THROUGH MONDAY LEAVING MUCH OF THE AREA IN SOUTHWEST  
FLOW. A FRONT ASSOCIATED WITH THE SYSTEM WILL DROP INTO THE AREA  
LATE SATURDAY INTO SUNDAY.  
 
-ARCTIC OCEAN-  
ICE COVERED.  
 
-BEAUFORT SEA-  
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-  
 
THE MAIN ICE EDGE IN THE BEAUFORT SEA EXTENDS FROM APPROXIMATELY 370  
NM NORTH OF POINT BARROW TO 75.6N 135.5W TO 74.6N 138.5W TO 74.4N  
135.2W TO 72.8N 144.5W TO 71.3N 136.8W TO 71.4N 135.2W AND CONTINUES  
EASTWARD INTO CANADIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.  
 
FORECAST THROUGH MONDAY FOR THE BEAUFORT SEA...HIGH PRESSURE AND  
LIGHT WINDS WILL SET UP OVER THE BEAUFORT THROUGH THURSDAY. LIGHT  
WINDS WILL GIVE WAY TO NORTHERNLY WINDS ON FRIDAY. THE ICE EDGE  
WITHIN THE BEAUFORT SEA IS EXPECTED TO SHIFT 10 TO 20 NM TO THE  
SOUTHWEST THROUGH MONDAY. ICE WILL CONTINUE TO MELT WITHIN THE ICE  
PACK THROUGH SATURDAY.  
 

 
 
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