167  
FZAK80 PAFC 161432  
ICEAFC  
 
SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS  
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA  
320 PM AKDT MONDAY 15 OCTOBER 2018  
 
FORECAST VALID...SATURDAY 20 OCTOBER 2018  
 
ANALYSIS CONFIDENCE...MODERATE TO HIGH  
 
SYNOPSIS...A FRONT WILL SIT OVER THE SOUTHERN BEAUFORT THROUGH  
WEDNESDAY NIGHT. HIGH PRESSURE WILL REMAIN OVER THE NORTHERN  
BEAUFORT SEA THROUGH SATURDAY, SPREADING SOUTHWARD AFTER WEDNESDAY.  
 
-ARCTIC OCEAN-  
-BEAUFORT SEA-  
-CHUKCHI SEA-  
 
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-  
 
THE ICE EDGE EXTENDS FROM NEAR POINT BARROW TO 70N 141.7W TO 71.7N  
149W TO 73.1N 148.6W TO 72N 153.2W TO 75.8N 167.4W TO 75.5N 174.4W  
AND CONTINUES WESTWARD INTO RUSSIAN WATERS. THE ICE EDGE IS MAINLY  
OPEN WATER.  
 
FORECAST FOR THE CHUKCHI SEA (DAYS 1 THROUGH 5)...LIGHT SOUTHERLY  
WINDS WILL CONTINUE ACROSS THE NORTHERN CHUKCHI. THE ICE EDGE WILL  
DRIFT NORTHWARD UP TO 10NM, WITH ADDITIONAL NEW SEA ICE GROWTH  
EXPECTED ALONG AND NEAR THE ICE EDGE THROUGH SATURDAY.  
 
FORECAST FOR THE BEAUFORT SEA (DAYS 1 THROUGH 5)...LIGHT TO MODERATE  
EASTERLY WINDS WILL PERSIST THROUGH THURSDAY AFTERNOON NEAR THE  
ALASKAN COAST. EXPECT THE PACK ICE IN THE EASTERN BEAUFORT TO DRIFT  
WESTWARD 25 TO 45 NM THROUGH SATURDAY WITH CONTINUED GROWTH ALONG  
THE ICE EDGE. HIGH PRESSURE AND FAVORABLE SEA SURFACE TEMPERATURES  
WILL EXIST IN THE NORTHERN BEAUFORT, WHICH WILL LEAD TO A FLASH  
FREEZE OF MOST OF THE AREA.  
 

 
LAWSON  
 
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