950  
FZAK80 PAFC 162045 CCA  
ICEAFC  
 
SEA ICE FORECAST FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS  
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA  
1245 PM AKDT WEDNESDAY 16 SEPTEMBER 2020  
 
FORECAST VALID...MONDAY 21 SEPTEMBER 2020  
 
ANALYSIS CONFIDENCE...HIGH  
 
SYNOPSIS...HIGH PRESSURE WILL DRIFT OFF TO THE SOUTHEAST THROUGH  
FRIDAY AS A LOW MOVES NORTHEASTWARD THROUGH THE BEAUFORT SEA FRIDAY  
THROUGH MONDAY. ANOTHER LOW WILL MOVE SOUTHEASTWARD FROM THE HIGH  
ARCTIC THROUGH THE CHUKCHI SEA SUNDAY AND MONDAY.  
 
-CHUKCHI SEA-  
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-  
 
THE MAIN SEA ICE EDGE EXTENDS FROM APPROXIMATELY 540 NM NORTH OF  
POINT BARROW TO 79.8N 163.1W TO 78N 170.8W AND CONTINUES WEST IN  
RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.  
 
FORECAST FOR THE CHUKCHI SEA (DAYS 1 THROUGH 5)...WINDS WILL  
GENERALLY BE LIGHT AND VARIABLE OVER THE ICE EDGE THROUGH MONDAY.  
EXPECT THE ICE TO CONTINUE MELTING SOUTH OF 78N OR SO, WHILE NEW ICE  
FORMATION CONTINUES WITHIN THE ICE PACK AND NEAR THE ICE EDGE NORTH  
OF 78N. DURING TIMES OR IN AREAS OF LIGHT WINDS, NEW SEA ICE MAY  
FORM IN THE OVERNIGHT HOURS AND MELT DURING THE DAY.  
 
-BEAUFORT SEA-  
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-  
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-  
 
THE MAIN ICE EDGE EXTENDS FROM APPROXIMATELY 540 NM NORTH OF POINT  
BARROW TO 79.8N 153.5W TO 77.1N 144.4W TO 75.9N 148.5W TO 75.3N  
153.7W TO 72.5N 148.4W TO 71.2N 145.7W TO 71.2N 142.1W TO 70.1N  
140.4W AND CONTINUES EAST IN CANADIAN WATERS. THE ICE EDGE IS MAINLY  
OPEN WATER.  
 
FORECAST FOR THE BEAUFORT SEA (DAYS 1 THROUGH 5)...WINDS WILL  
GENERALLY BE EASTERLY THROUGH SATURDAY, THEN BECOMING NORTHERLY TO  
NORTHWESTERLY AS THE LOW PASSES BY. EXPECT THE ICE TO CONTINUE  
MELTING SOUTH OF 78N OR SO, WHILE NEW ICE FORMATION CONTINUES WITHIN  
THE ICE PACK AND NEAR THE ICE EDGE NORTH OF 78N. DURING TIMES OR IN  
AREAS OF LIGHT WINDS, NEW SEA ICE MAY FORM IN THE OVERNIGHT HOURS  
AND MELT DURING THE DAY.  
 

 
SCHRECK  
 
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