430  
FZAK80 PAFC 122259  
ICEAFC  
 
SEA ICE FORECAST FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS  
NATIONAL WEATHER SERVICE - ALASKA SEA ICE PROGRAM  
300 PM AKDT FRIDAY 12 SEPTEMBER 2025  
 
FORECAST VALID...WEDNESDAY 17 SEPTEMBER 2025  
 
ANALYSIS CONFIDENCE...HIGH  
 
SYNOPSIS...HIGH PRESSURE REMAINS OVER THE HIGH ARCTIC. A WEAK LOW  
WILL MOVE NEAR THE NORTHWEST ALASKA COASTLINE INTO THE CHUKCHI SEA  
WHERE IT WILL WEAKEN THROUGH MONDAY.  
 
-BEAUFORT SEA-  
 
PKZ505-CENTRAL US ARCTIC OFFSHORE-  
PKZ510-EASTERN US ARCTIC OFFSHORE-  
PKZ814-CAPE HALKETT TO FLAXMAN ISLAND OUT TO 15 NM-  
PKZ859-POINT FRANKLIN TO CAPE HALKETT FROM 15 TO 75 NM-  
PKZ860-CAPE HALKETT TO FLAXMAN ISLAND FROM 15 TO 80 NM-  
PKZ861-FLAXMAN ISLAND TO DEMARCATION POINT FROM 15 TO 75 NM-  
 
THE MAIN ICE EDGE IN THE BEAUFORT SEA EXTENDS FROM 72 10’N 154 54’W  
TO 71 20’N 146 51’W TO 70 33’N 145 28’W TO 70 11’N 140 18’W AND  
CONTINUES EAST INTO CANADIAN WATERS. THE ICE EDGE IS OPEN WATER.  
 
FROM LAND-BASED POINTS IN ALASKA, THE MAIN ICE EDGE IN THE BEAUFORT  
SEA EXTENDS FROM 54 NM NORTH-NORTHEAST OF PT. BARROW TO 64 NM NORTH  
OF FLAXMAN ISLAND TO 25 NM WEST NORTHWEST OF KAKTOVIK TO 35 NM NORTH  
OF DEMARCATION POINT AND CONTINUES EAST INTO CANADIAN WATERS. THE  
ICE EDGE IS OPEN WATER.  
 
FORECAST FOR THE BEAUFORT SEA (DAYS 1 THROUGH 5)...FORECAST  
CONFIDENCE IS MODERATE. LIGHT SOUTHERLY TO EASTERLY WINDS WILL  
PERSIST THROUGH THE PERIOD. ICE WILL CONTINUE TO MELT AND THIN  
THROUGHOUT THE FORECAST PERIOD. SEA ICE WILL MOVE NORTHWARD ABOUT 5  
TO 10 NM/DAY. NEW ICE HAS GROWN AWAY FROM THE PACK AROUND 78N, THIS  
ICE WILL LIKELY MELT WITH THE UPCOMING SOUTHERLY WINDS BUT IS A SIGN  
THAT THE WATERS IN THE AREA ARE PRIMED TO FREEZE ONCE TEMPERATURES  
SEASONALLY GET COLDER OVER THE NEXT FEW WEEKS. SEA ICE MINIMUM IS  
LIKELY WITHIN THE NEXT 7 TO 10 DAYS.  
 
-CHUKCHI SEA-  
 
PKZ500-WESTERN US ARCTIC OFFSHORE-  
PKZ505-CENTRAL US ARCTIC OFFSHORE-  
PKZ858-CAPE BEAUFORT TO POINT FRANKLIN FROM 15 TO 85 NM-  
PKZ859-POINT FRANKLIN TO CAPE HALKETT FROM 15 TO 75 NM-  
 
THE MAIN ICE EDGE IN THE CHUKCHI SEA EXTENDS FROM 72 10’N 154 54’W  
TO 71 16’N 161 32’W TO 71 57’N 163 40’W TO 73 50’N 165 10’W AND  
CONTINUES SOUTHWEST IN RUSSIAN WATERS. THE ICE EDGE IS OPEN WATER.  
 
FROM LAND-BASED POINTS IN ALASKA, THE MAIN ICE EDGE IN THE CHUKCHI  
SEA EXTENDS FROM 54 NM NORTH-NORTHEAST OF PT. BARROW TO 55 NM WEST  
OF PT. FRANKLIN TO 105 NM WEST-NORTHWEST OF PT. FRANKLIN TO 200 NM  
NORTHWEST OF POINT FRANKLIN AND CONTINUES SOUTHWEST IN RUSSIAN  
WATERS. THE ICE EDGE IS OPEN WATER.  
 
FORECAST FOR THE CHUKCHI SEA (DAYS 1 THROUGH 5)...FORECAST  
CONFIDENCE IS MODERATE. LIGHT AND VARIABLE WINDS AROUND THE WEAK  
SURFACE LOW PRESSURE WILL TURN LIGHT SOUTHERLY THROUGH THE WEEKEND.  
THE OLD BRASH ICE HANGING AROUND HANNA SHOAL WILL MAY NOT SURVIVE  
THE SOUTHERLY WINDS AND ADVECTION OF WARMER WATER INTO THE AREA.  
OVERALL EXPECT THE ICE EDGE TO RETREAT NORTHWARD 5-10 NM/DAY THROUGH  
MONDAY THEN MOVING WITH TIDES AND CURRENTS THEREAFTER.  
 

 
LAWSON  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab AK Page Main Text Page