Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 182316
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
316 PM AKDT WEDNESDAY 18 OCTOBER 2017

FORECAST VALID THROUGH...MONDAY 23 OCTOBER 2017

ANALYSIS CONFIDENCE...HIGH TO MODERATE

SYNOPSIS...WEAK LOW PRESSURE OVER THE EASTERN BEAUFORT SEA WILL MOVE
SOUTHWEST TOWARD THE BERING STRAIT THROUGH FRIDAY. MEANWHILE...HIGH
PRESSURE WILL BUILD OVER THE CHUKCHI AND BEAUFORT SEAS THROUGH
MONDAY.

-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 250
NM NORTH OF POINT BARROW TO 70.7N 140.6W AND CONTINUES EASTWARD INTO
CANADIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER. NEW SEA ICE HAS
ALSO BEEN NOTED ALONG THE NORTH COAST OF ALASKA UP TO 11 NM OFFSHORE
FROM POINT BARROW TO DEMARCATION POINT.

FORECAST THROUGH MONDAY FOR THE BEAUFORT SEA...LIGHT AND VARIABLE
WINDS WILL BECOME MODERATE NORTHEASTERLY THURSDAY THROUGH MONDAY.
THE OVERALL ICE EDGE IS EXPECTED TO MOVE AND EXPAND 25 TO 40 NM
SOUTHWESTWARD THROUGH MONDAY. SEA ICE ALONG THE ALASKA COASTLINE IS
EXPECTED TO EXPAND NORTHWARD UP TO 10 NM.

-CHUKCHI SEA-
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-

THE MAIN ICE EDGE IN THE CHUKCHI SEA EXTENDS FROM APPROXIMATELY 250
NM NORTH OF POINT BARROW TO 77N 167.9W TO 74N 175W AND CONTINUES IN
RUSSIAN WATERS. NEW AND YOUNG SEA ICE HAS ALSO BEEN OBSERVED BEHIND
BARRIER ISLANDS AND WITHIN PROTECTED WATERS FROM NEAR POINT LAY
TO POINT BARROW.

FORECAST THROUGH MONDAY FOR THE CHUKCHI SEA...MODERATE NORTHERLY
WINDS WILL BECOME EASTERLY SUNDAY THROUGH MONDAY. THE OVERALL ICE
EDGE IS EXPECTED TO MOVE AND EXPAND 40 TO 50 NM SOUTH-SOUTHWESTWARD
THROUGH MONDAY.

-BERING SEA-
PKZ200-NORTON SOUND-
PKZ210-DALL POINT TO WALES-

NEW SEA ICE HAS BEEN OBSERVED NEAR THE YUKON RIVER DELTA AS WELL AS
WITHIN PROTECTED BAYS OF NORTHERN NORTON SOUND.

FORECAST THROUGH MONDAY FOR THE BERING SEA...COOL AIR WILL REMAIN
OVER THE WEST COAST OF ALASKA THROUGH MONDAY. ADDITIONAL NEW SEA ICE
MAY FORM IN SHALLOW PROTECTED LOCATIONS ALONG THE COAST...HOWEVER
WARM SEA SURFACE TEMPERATURES WILL PROHIBIT NEW SEA ICE FROM FORMING
FARTHER OFFSHORE THROUGH MONDAY.

$$


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