Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 292130
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
130 PM AKDT FRIDAY 29 MAY 2015

FORECAST VALID...WEDNESDAY 3 JUNE 2015

ANALYSIS CONFIDENCE...MODERATE TO HIGH

SYNOPSIS...A LOW OVER THE WESTERN BERING SEA WILL WEAKEN THROUGH
SATURDAY. HIGH PRESSURE WILL PERSIST OVER MUCH OF THE BEAUFORT AND
CHUKCHI SEAS THROUGH WEDNESDAY... WITH A RIDGE OF HIGH PRESSURE
PASSING ACROSS THE NORTHERN BERING SEA SUNDAY THROUGH MONDAY. A
LARGE LOW WILL PASS OVER THE ALEUTIAN ISLAND CHAIN LATE MONDAY
THROUGH WEDNESDAY.

-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 NEAR PORT CLARENCE TO 65.7N 168.7W TO
67.2N 169.0W TO 68.0N 168.8W TO 68.6N 170.7W TO 68.3N 172.1W TO
66.3N 169.1W TO THE RUSSIAN COAST NEAR 65.8N 170.5W. 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 WEDNESDAY FOR THE BERING SEA...DAYTIME TEMPERATURES
IN THE MID 40S AND OVERNIGHT LOWS IN THE UPPER 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 WEDNESDAY. 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 WEDNESDAY FOR THE CHUKCHI SEA...EASTERLY WIND FLOW
WILL BECOME NORTHEASTERLY THIS WEEKEND OVER MUCH OF THE CHUKCHI SEA
ICE EDGE. DAYTIME HIGHS IN THE 50S 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 WEDNESDAY 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 WEST SOUTHWEST
THROUGH WEDNESDAY.



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