531  
FZAK80 PAFC 252251  
ICEAFC  
 
SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS  
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA  
250 PM AKDT WEDNESDAY 25 APRIL 2018  
 
FORECAST VALID...MONDAY 30 APRIL 2018  
 
ANALYSIS CONFIDENCE...HIGH TO MODERATE  
 
SYNOPSIS...A STRONG LOW NEAR THE BERING STRAIT WILL GRADUALLY WEAKEN  
THROUGH FRIDAY NIGHT. ANOTHER SERIES OF LOWS WILL MOVE FROM WEST TO  
EAST ACROSS THE BERING SEA THURSDAY NIGHT THROUGH MONDAY.  
 
-ARCTIC OCEAN-  
-BEAUFORT SEA-  
-CHUKCHI SEA-  
-BERING SEA-  
PKZ215-KOTZEBUE SOUND-  
PKZ220-WALES TO CAPE THOMPSON-  
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-  
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-  
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-  
 
ICE COVERED.  
 
-BERING SEA-  
PKZ180-KUSKOKWIM DELTA AND ETOLIN STRAIT-  
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-  
PKZ200-NORTON SOUND-  
PKZ210-DALL POINT TO WALES-  
 
THE MAIN ICE EDGE IN THE BERING SEA EXTENDS APPROXIMATELY 10 NM  
OFFSHORE OF THE ALASKAN COAST FROM NEAR QUINHAGAK TO 63.3N 165.1W,  
THEN CONTINUES TO 64.2N 170.5W TO 63.5N 173.7W TO 63.6N 174.3W TO  
THE RUSSIAN COAST NEAR 64.3N 173.5W. THERE IS ALSO ADDITIONAL SEA  
ICE REMAINING IN THE WESTERN GULF OF ANADYR. THE ICE EDGE IS MAINLY  
OPEN WATER.  
 
FORECAST FOR THE BERING SEA (DAYS 1 THROUGH 5)...WINDS ALONG THE  
BERING SEA ICE EDGE WILL REMAIN SOUTHERLY THROUGH SATURDAY, THEN  
BECOME VARIABLE AND SHIFT AROUND TO THE NORTH SUNDAY INTO MONDAY.  
THE ICE EDGE IS EXPECTED TO RETREAT TO THE NORTH BY 10 TO 20 NM  
THROUGH MONDAY.  
 
-COOK INLET-  
PKZ130-WEST OF BARREN ISLANDS INCLUDING KAMISHAK BAY-  
PKZ139-COOK INLET KALGIN ISLAND TO PT. BEDE-  
PKZ140-COOK INLET NORTH OF KALGIN ISLAND-  
 
ANALYSIS CONFIDENCE...HIGH TO MODERATE  
 
SEA ICE EDGE DISCUSSION...THE ONLY SEA ICE THAT REMAINS WITHIN COOK  
INLET IS WITHIN THE UPPER END OF KNIK ARM, AT THE MOUTH OF THE  
SUSITNA RIVER, AND STRANDED ON MUDFLATS ALONG PORTIONS OF THE COAST.  
OCCASIONALLY, SOME RIVER ICE WILL FLOW SOUTH FROM KNIK ARM PAST THE  
PORT OF ANCHORAGE BEFORE MELTING.  
 
FORECAST FOR COOK INLET (DAYS 1 THROUGH 5)...TEMPERATURES WILL  
REMAIN ABOVE FREEZING THROUGH MONDAY. THE REMAINING COOK INLET SEA  
ICE WILL CONTINUE TO GRADUALLY MELT OUT THROUGH MONDAY.  
 
PLEASE NOTE...COOK INLET SEA ICE CHANGES SIGNIFICANTLY WITH THE  
TIDES.  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab AK Page Main Text Page