Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 012308
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
308 PM AKDT MONDAY 1 JUNE 2015

FORECAST VALID...SATURDAY 6 JUNE 2015

ANALYSIS CONFIDENCE...HIGH

SYNOPSIS...HIGH PRESSURE WILL PERSIST OVER MUCH OF THE BEAUFORT AND
CHUKCHI SEAS THROUGH WEDNESDAY. A LARGE LOW WILL PASS OVER THE
ALEUTIAN ISLAND CHAIN TONIGHT AND TUESDAY...AND COMBINE WITH A LOW
OVER THE SOUTHWEST MAINLAND THURSDAY THROUGH SATURDAY.

-ARCTIC OCEAN-
-BEAUFORT SEA-
-CHUKCHI SEA-
PKZ510-EASTERN US ARCTIC OFFSHORE-
PKZ505-CENTRAL US ARCTIC OFFSHORE-
PKZ500-WESTERN US 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-

ICE COVERED.

-CHUKCHI SEA-
-BEAUFORT SEA-
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-
PKZ220-WALES TO CAPE THOMPSON-
PKZ210-DALL POINT TO WALES-

THE MAIN ICE EDGE LIES FROM 65.2N 166.5W TO 65.6N 168.2W TO 65.7N
168.4W TO 66.9N 165.6W TO 67.8N 170.1W TO 69.2N 171.1W TO 68.7N
174.6W TO 67.2N 172.8W TO 66N 169.5W. THE ICE EDGE IS MAINLY OPEN
WATER.

ISOLATED ICE FLOES ARE ALSO DRIFTING NEAR THE NORTH OF SAINT
LAWRENCE ISLAND AND ICE WITHIN THE LAGOONS IS MELTING IN PLACE.

FORECAST THROUGH SATURDAY FOR THE BERING SEA...DAYTIME TEMPERATURES
IN THE 40S AND OVERNIGHT LOWS IN THE 30S ARE EXPECTED TO ASSIST IN
MELTING THE REMAINING LAGOON ICE AROUND SAINT LAWRENCE ISLAND.
CONCENTRATIONS WITHIN THE LAGOONS SHOULD REMAIN BELOW 3 TENTHS BY
SATURDAY. THE ICE FLOES NEAR THE NORTH COAST OF THE ISLAND ARE
EXPECTED TO MELT OUT TO SEA ICE FREE CONDITIONS BY WEDNESDAY. SEA
ICE NEAR PORT CLARENCE IS EXPECTED TO CONTINUE SLOWLY MELTING IN
PLACE WITH SOME ICE BECOMING CAUGHT IN THE COASTAL CURRENT.

FORECAST THROUGH SATURDAY FOR THE CHUKCHI SEA...NORTHERLY AND
NORTHEASTERLY FLOW WILL PERSIST OVER MUCH OF THE CHUKCHI SEA ICE
EDGE THROUGH SATURDAY. THE MAIN ICE EDGE IN THE CHUKCHI SEA WILL
LIKELY EXPAND SOUTHWARD 10 TO 20NM BY SATURDAY...WITH MELTING ALONG
THE SOUTHERN EDGE. DAYTIME HIGHS IN THE 40S IN THE REGION FROM WALES
TO SHISHMAREF TO KOTZEBUE WILL ALLOW ICE WITHIN THE LAGOONS AND
WITHIN THE SOUND TO CONTINUE RAPIDLY MELTING. IT IS EXPECTED THAT
THE ICE WITHIN THE LAGOONS FROM WALES TO SHISHMAREF WILL BE LESS
THAN 3 TENTHS CONCENTRATION BY SATURDAY AND THE SEA ICE WITHIN
KOTZEBUE SOUND WILL BE LESS THAN 5 TENTHS CONCENTRATION BY
WEDNESDAY. ICE FLOES REMAINING IN THE SOUTHERN CHUKCHI SEA WILL
CONTINUE TO MELT DECREASING IN CONCENTRATION AND DRIFTING TO THE
SOUTHWEST THROUGH SATURDAY.



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