Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 232217
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
215 PM AKDT WEDNESDAY 23 AUGUST 2017

FORECAST VALID...MONDAY 28 AUGUST 2017

ANALYSIS CONFIDENCE...HIGH

SYNOPSIS...WEAK LOW PRESSURE OVER THE EASTERN BEAUFORT SEA WILL MOVE
AWAY FROM THE AREA BY FRIDAY MORNING. HIGH PRESSURE OVER THE CHUKCHI
SEA WILL BUILD EASTWARD INTO THE BEAUFORT THIS WEEKEND AND PERSIST
THROUGH MONDAY.

-ARCTIC OCEAN-
ICE COVERED.

-BEAUFORT SEA-
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-

THE MAIN ICE EDGE IN THE BEAUFORT SEA CONTINUES FROM CANADIAN WATERS
AT 71.5N 135.0W TO 71.7N 143.9W TO 74.6N 138.1W TO 74.5N 142.8W TO
76.2N 143.1W AND CONTINUES INTO THE CHUKCHI SEA AT 75.7N 157.3W. THE
ICE EDGE IS MAINLY OPEN WATER. THERE IS ALSO AN AREA OF BRASH SEA
ICE LOCATED BETWEEN 72.8N AND 73.7N AND 150.4W AND 153.8W.

FORECAST THROUGH MONDAY FOR THE BEAUFORT SEA...LIGHT NORTH-NORTHEAST
WINDS WILL PERSIST OVER THE ICE PACK THROUGH SATURDAY...THEN BECOME
MORE VARIABLE THROUGH MONDAY. THE ICE EDGE IS EXPECTED TO SHOW
RELATIVELY LITTLE CHANGE IN POSITION AND REMAIN WITHIN 10 NM OF ITS
CURRENT LOCATION THROUGH MONDAY AS SOUTHWARD MOVEMENT DUE TO THE
WINDS IS COUNTERED BY WARMER WATER SOUTH OF THE PACK. THE AREA OF
BRASH ICE WILL LIKELY MELT OUT BY MONDAY.

-CHUKCHI SEA-
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-

THE MAIN ICE EDGE IN THE CHUKCHI SEA CONTINUES FROM THE BEAUFORT SEA
AT 75.7N 157.3W TO 74.1N 168.2W TO 72.5N 179.0E AND CONTINUES IN
RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH MONDAY FOR THE CHUKCHI SEA...GENERALLY LIGHT AND
VARIABLE WINDS OVER THE ICE PACK WILL GIVE WAY TO LIGHT SOUTHEAST
WINDS THIS WEEKEND INTO MONDAY. THE ICE EDGE IS EXPECTED TO RETREAT
TO THE NORTH-NORTHWEST UP TO 10 NM THROUGH MONDAY...WITH CONTINUED
MELTING WITHIN THE ICE PACK.

$$



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