Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 292123
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
125 PM AKDT WEDNESDAY 29 MARCH 2017

FORECAST VALID...MONDAY 3 APRIL 2017

ANALYSIS CONFIDENCE...HIGH TO MODERATE

SYNOPSIS...A SERIES OF LOWS WILL MOVE EASTWARD ACROSS THE NORTH
PACIFIC OCEAN AND NORTHERN GULF OF ALASKA...WHILE HIGH PRESSURE
MOVES NORTHWARD OVER THE ARCTIC OCEAN 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-

PKZ160-BRISTOL BAY-
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-
PKZ210-DALL POINT TO WALES-

ICE COVERED.

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 55.9N 161.8W
TO 57.3N 161.2W TO 56.1N 165W TO 58.4N 173.3W TO 61.2N 177.6W AND
CONTINUES IN RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH MONDAY FOR THE BERING SEA...WINDS ARE EXPECTED TO
BE MAINLY NORTHERLY TO NORTHEASTERLY OVER MUCH OF THE BERING SEA ICE
EDGE THROUGH MONDAY. THE ICE EDGE IS EXPECTED TO SHIFT 20 TO 30 NM
TO THE WEST SOUTHWEST THROUGH SATURDAY... AS THE WINDS CONTINUE TO
PULL BELTS AND STRIPS OF ICE OFF THE MAIN ICE PACK.

-COOK INLET-
PKZ130-WEST OF BARREN ISLANDS INCLUDING KAMISHAK BAY-
PKZ139-COOK INLET KALGIN ISLAND TO POINT BEDE-
PKZ140-COOK INLET NORTH OF KALGIN ISLAND-
PKZ141-KACHEMAK BAY-

COOK INLET ANALYSIS CONFIDENCE...MODERATE TO LOW

SYNOPSIS FOR COOK INLET...A SERIES OF LOWS WILL MOVE OVER
SOUTHCENTRAL ALASKA THROUGH MONDAY.

THE MAIN ICE EDGE IN COOK INLET EXTENDS FROM NEAR 60.3N 151.4W TO
59.6N 152.8W TO 59.8N 152.8W AND CONTINUES DOWN THE WEST COAST OF
LOWER COOK INLET. THE ICE EDGE IS MAINLY OPEN WATER. THERE IS ALSO
SEA ICE PRESENT IN NORTHWEST SHELIKOF STRAIT...AS WELL AS IN SHALLOW
AREAS OF KACHEMAK BAY.

FORECAST THROUGH MONDAY FOR COOK INLET...WINDS WILL GENERALLY BE
NORTHERLY TO NORTHEASTERLY THROUGH MONDAY. DAYTIME TEMPERATURES ARE
FORECAST TO BE IN THE 30S TO LOW 40S... WITH OVERNIGHT LOWS NEAR
FREEZING. IT IS LIKELY THAT THE HEAVIEST ICE CONCENTRATIONS MAY
TEMPORARILY SHIFT TOWARDS THE WESTERN HALF OF THE INLET... AND AREAS
OF NEW AND YOUNG ICE MAY SEE MELTING ALONG THE EASTERN HALF OF THE
INLET AND NEAR KNIK AND TURNAGAIN ARM. STRIPS OF ICE WILL CONTINUE
TO BE PULLED OFF THE SOUTHERN END OF THE ICE PACK THROUGH MONDAY DUE
TO THE NORTHERLY COMPONENT OF THE WINDS.

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

$$



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