Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 222235
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
235 PM AKDT FRIDAY 22 SEPTEMBER 2017

FORECAST VALID THROUGH...WEDNESDAY 27 SEPTEMBER 2017

ANALYSIS CONFIDENCE...HIGH

SYNOPSIS...HIGH PRESSURE WILL REMAIN OVER THE BEAUFORT SEA THROUGH
SATURDAY NIGHT. A FRONT ASSOCIATED WITH A LOW OVER THE HIGH ARCTIC
WILL MOVE THROUGH THE BEAUFORT SUNDAY INTO MONDAY. ANOTHER LOW WILL
THEN MOVE INTO THE CHUKCHI SEA TUESDAY INTO WEDNESDAY.

-ARCTIC OCEAN-
ICE COVERED.

-BEAUFORT SEA-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-
PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-

THE MAIN ICE EDGE IN THE BEAUFORT SEA EXTENDS FROM APPROXIMATELY 375
NM NORTH OF POINT BARROW TO 75.8N 137W TO 72.8N 144.2W TO 71N 137.6W
AND CONTINUES IN CANADIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH WEDNESDAY FOR THE BEAUFORT SEA...LIGHT AND VARIABLE
WINDS WILL PERSIST OVER THE ICE EDGE THROUGH THROUGH SUNDAY
AFTERNOON...THEN SHIFT TO THE WEST LATE SUNDAY AND REMAIN WESTERLY
THROUGH WEDNESDAY. ALONG THE SOUTHERN EXTENT OF THE ICE EDGE TO THE
WEST OF BANKS ISLAND...EASTERLY WINDS WILL PERSIST THROUGH SUNDAY
AND THEN SHIFT TO THE WEST MONDAY THROUGH WEDNESDAY. THE ICE EDGE
WITHIN THE BEAUFORT SEA IS EXPECTED TO EXPAND BY 10 TO 20 NM TO THE
SOUTH AND WEST THROUGH WEDNESDAY. NEW ICE IS EXPECTED TO FORM ALONG
THE EDGE AND WITHIN THE PACK THROUGH WEDNESDAY.

MUCH COLDER AIR IS EXPECTED TO MOVE INTO THE BEAUFORT SEA REGION
EARLY NEXT WEEK. IT IS POSSIBLE THAT NEW ICE COULD BEGIN TO FORM
INSIDE OF THE BARRIER ISLANDS ALONG THE BEAUFORT SEA COAST BY
WEDNESDAY.

$$



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