Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 262303
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
300 PM AKDT WEDNESDAY 26 APRIL 2017

FORECAST VALID...MONDAY 1 MAY 2017

ANALYSIS CONFIDENCE...HIGH TO MODERATE

SYNOPSIS...HIGH PRESSURE WILL PERSIST OVER THE CHUKCHI AND BEAUFORT
SEAS THROUGH MONDAY. A BROAD LOW PRESSURE SYSTEM OVER THE CENTRAL
ALEUTIANS WILL MOVE EAST AND DISSIPATE BY THURSDAY NIGHT. ANOTHER
LOW WILL MOVE EASTWARD ACROSS THE SOUTHERN BERING FRIDAY THROUGH
MONDAY.

-ARCTIC OCEAN-
-BEAUFORT SEA-
-CHUKCHI SEA-
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-
PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-
PKZ220-WALES TO CAPE THOMPSON-
PKZ215-KOTZEBUE SOUND-
PKZ200-NORTON SOUND-

ICE COVERED.

-BERING SEA-

PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-
PKZ210-DALL POINT TO WALES-

ICE COVERED.

PKZ160-BRISTOL BAY-
PKZ165-PORT HEIDEN TO CAPE SARICHEF-
PKZ180-KUSKOKWIM DELTA TO ETOLIN STRAIT-
PKZ185-SAINT MATTHEW ISLAND WATERS-
PKZ412-BERING SEA OFFSHORE 171W TO 180 AND N OF 56N-
PKZ414-BERING SEA OFFSHORE EAST OF 171W-

THE MAIN ICE EDGE IN THE BERING SEA EXTENDS FROM NEAR CAPE NEWENHAM
TO 59.4N 162.3W TO 59.7N 168.5W TO 58.6N 168.7W TO 58.1N 171.7W TO
60.7N 177.0W AND CONTINUES IN RUSSIAN WATERS. THE ICE EDGE IS MAINLY
OPEN WATER. SEA ICE ALSO REMAINS IN SHALLOW BAYS AND OTHER PROTECTED
AREAS ALONG THE BRISTOL BAY COAST.

FORECAST THROUGH MONDAY FOR THE BERING SEA...WINDS OVER THE ICE EDGE
WILL BE LIGHT AND VARIABLE TO THE EAST OF SAINT MATTHEW ISLAND AND
NORTHERLY TO THE WEST OF SAINT MATTHEW ISLAND THROUGH THURSDAY
NIGHT. WINDS WILL THEN INCREASE OUT OF THE EAST BEGINNING ON FRIDAY
AND SHIFT TO THE NORTH SUNDAY INTO MONDAY AS THE NEXT LOW CROSSES
THE BERING. THE ICE EDGE IS EXPECTED TO MOVE MAINLY WESTWARD BY 20
TO 35 NM THROUGH MONDAY. SEA ICE ALONG THE BRISTOL BAY COAST WILL
CONTINUE TO GRADUALLY MELT THROUGH MONDAY.

-COOK INLET-
PKZ140-COOK INLET NORTH OF KALGIN ISLAND-

COOK INLET ANALYSIS CONFIDENCE...MODERATE TO LOW

SYNOPSIS FOR COOK INLET...A RELATIVELY BENIGN UPPER LEVEL PATTERN
WILL PERSIST OVER SOUTHCENTRAL ALASKA THROUGH MONDAY BETWEEN HIGH
PRESSURE TO THE EAST AND LOW PRESSURE TO THE WEST.

THE MAIN ICE EDGE IN COOK INLET EXTENDS FROM NEAR 61.0N 150.6W TO
61.1N 151.1W. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH MONDAY FOR COOK INLET...WINDS WILL GENERALLY REMAIN
LIGHT AND VARIABLE OVER UPPER COOK INLET THROUGH MONDAY. DAYTIME
TEMPERATURES ARE FORECAST TO BE IN THE UPPER 40S AND LOWER 50S WITH
OVERNIGHT LOWS IN THE MID TO UPPER 30S.

THE REMAINING SEA ICE IN COOK INLET WILL CONTINUE TO MOVE
WITH THE TIDES AND MELT THROUGH MONDAY.

PLEASE NOTE...COOK INLET ICE CHANGES SIGNIFICANTLY WITH THE TIDES.

$$



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