Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 162252
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
253 PM AKDT MONDAY 16 OCTOBER 2017

FORECAST VALID THROUGH...SATURDAY 21 OCTOBER 2017

ANALYSIS CONFIDENCE...HIGH

SYNOPSIS...WEAK LOW PRESSURE NEAR BANKS ISLAND WILL SPIN IN PLACE
AND DISSIPATE THROUGH MID-WEEK. ANOTHER LOW PRESSURE WILL FORM NEAR
THE NORTHERN COAST OF ALASKA LATE IN THE WEEK. COMBINED WITH A
SIBERIAN HIGH PRESSURE, THE LOW WILL FORM A TIGHT GRADIENT AND
STRONGER NORTHERLY WINDS THROUGH THE PERIOD.

-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 300
NM NORTH OF POINT BARROW TO 71.2N 139.9W TO 70.8N 136.8W TO 71.1N
135.1W 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 BEHIND BARRIER ISLANDS.

FORECAST THROUGH SATURDAY FOR THE BEAUFORT SEA...WINDS WILL REMAIN
NORTHERLY  THROUGH WEDNESDAY BEFORE SWITCHING FROM THE EAST ON
THURSDAY. THE OVERALL ICE EDGE IS EXPECTED TO EXPAND 15 TO 30 NM
SOUTHWESTWARD THROUGH SATURDAY BETWEEN PACK DRIFT AND NEW ICE GROWTH
ALONG THE EDGE.

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

THE MAIN ICE EDGE IN THE CHUKCHI SEA EXTENDS FROM APPROXIMATELY 300
NM NORTH OF POINT BARROW TO 76.2N 161.6W TO 77.7N 170.5W TO 75.8N
170.0W TO 74.5N 173.9W TO 75.2N 179.7E TO 73.7N 178.0E AND CONTINUES
IN RUSSIAN WATERS. NEW SEA ICE HAS BEEN OBSERVED BEHIND BARRIER
ISLANDS FROM NEAR POINT LAY NORTHWARD.

FORECAST THROUGH SATURDAY THE CHUKCHI SEA...WINDS WILL REMAIN
NORTHERLY THROUGH THE PERIOD. THE OVERALL ICE EDGE IS EXPECTED TO
EXPAND 35 TO 45 NM SOUTHWESTWARD THROUGH SATURDAY.


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