Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 282217
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
217 PM AKDT FRIDAY 28 APRIL 2017

FORECAST VALID...WEDNESDAY 3 MAY 2017

ANALYSIS CONFIDENCE...MODERATE

SYNOPSIS...LOW PRESSURE WILL MOVE EASTWARD ACROSS THE SOUTHERN
BERING SEA THROUGH WEDNESDAY. HIGH PRESSURE WILL BEGIN TO BUILD
INTO THE WESTERN BERING SEA TUESDAY AND WEDNESDAY.

-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-
PKZ160-BRISTOL BAY-
PKZ165-PORT HEIDEN TO CAPE SARICHEF-
PKZ180-KUSKOKWIM DELTA TO ETOLIN STRAIT-
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-
PKZ185-SAINT MATTHEW ISLAND WATERS-
PKZ210-DALL POINT TO WALES-
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 60N 165.3W TO 59.7N 168.5W TO 58.2N 170.6W TO 62.3N 179.3W TO
61.8N 173.5W TO 62.9N 169.7W TO 63.8N 171.7W TO 63.8N 169.2W TO
64.3N 172.8W 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 WEDNESDAY FOR THE BERING SEA...WINDS OVER THE ICE
EDGE WILL BE EASTERLY TO SOUTHEASTERLY THROUGH SUNDAY...THEN
NORTHEASTERLY TO NORTHERLY MONDAY THROUGH WEDNESDAY. THE ICE EDGE IS
EXPECTED TO MOVE MAINLY WEST-SOUTHWESTWARD BY 20 TO 35 NM THROUGH
WEDNESDAY. SEA ICE ALONG THE BRISTOL BAY COAST WILL CONTINUE TO
GRADUALLY MELT THROUGH WEDNESDAY.

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

COOK INLET ANALYSIS CONFIDENCE...MODERATE TO HIGH

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

THE REMAINING BRASH SEA ICE IN COOK INLET IS NORTH OF A LINE FROM
NEAR 60.9N 150W TO NEAR THE SUSITNA RIVER DELTA.

FORECAST THROUGH WEDNESDAY FOR COOK INLET...WINDS WILL GENERALLY
REMAIN LIGHT AND VARIABLE OVER UPPER COOK INLET THROUGH WEDNESDAY.
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 WEDNESDAY.

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

$$



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