Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 302236
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
136 PM AKST FRIDAY 30 JANUARY 2015

FORECAST VALID...WEDNESDAY 4 FEBRUARY 2015

ANALYSIS CONFIDENCE...MODERATE TO HIGH

SYNOPSIS...HIGH PRESSURE OVER THE CENTRAL AND EASTERN BERING SEA
WILL MOVE INLAND OVER THE WEEKEND. AT THE SAME TIME...AN AREA OF LOW
PRESSURE WILL MOVE INTO THE WESTERN BERING SEA AND PUSH INTO THE
CHUKICHI SEA SUNDAY AFTERNOON. AN AREA OF LOW PRESSURE WILL PUSH A
WARM FRONT TOWARD THE ALEUTIANS AND SOUTHERN BERING SEA OVER THE
WEEKEND AND DISSIPATE EARLY NEXT WEEK. HIGH PRESSURE WILL THEN RE-
ESTABLISH OVER THE BERING SEA THROUGH WEDNESDAY.

-ARCTIC OCEAN-
-BEAUFORT SEA-
-CHUKCHI SEA-
PKZ500-WESTERN US ARCTIC OFFSHORE-
PKZ505-CENTRAL US ARCTIC OFFSHORE-
PKZ510-EASTERN US ARCTIC OFFSHORE-
PKZ220-WALES TO CAPE THOMPSON-
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-
PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-

ICE COVERED.

-BERING SEA-

PKZ215-KOTZEBUE SOUND-
PKZ200-NORTON SOUND-
PKZ210-DALL POINT TO WALES-
PKZ160-BRISTOL BAY-
PKZ180-KUSKOKWIM DELTA AND ETOLIN STRAIT-
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-
PKZ185-SAINT MATTHEW ISLAND WATERS-

THE MAIN ICE EDGE LIES FROM THE ALASKA COAST NEAR 57.3N 158.2W TO
157.9N 158.1W TO 57.9N 160.0W TO 58.3N 160.4W TO 58.1N 161.3W TO
58.4N 162.8W TO 58.3N 163.2W TO 58.1N 165.3W TO 58.3N 167.3W TO
59.1N 170.7W TO 60.3N 171.7W TO 61.3N 172.0W TO 62.8N 177.0W TO
62.2N 178.1W TO 61.8N 179.9W AND CONTINUES ALONG THE RUSSIAN COAST.
THE ICE EDGE IS MAINLY OPEN WATER...WITH 6 TO 8 TENTHS OF NEW AND
YOUNG ICE NEAR THE RUSSIAN COAST.

FORECAST THROUGH WEDNESDAY FOR THE BERING SEA EAST SOUTH OF NUNIVAK
ISLAND...EAST TO NORTHEAST WINDS WILL BEGIN TO DIMINISH LATE ON
SUNDAY AND INCREASE AGAIN LATE MONDAY. WARMER SEA SURFACE
TEMPERATURES SOUTH OF THE MAIN ICE EDGE WILL LIMIT ICE GROWTH
THROUGH WEDNESDAY. THE ICE EDGE IS EXPECTED TO EXPAND TO THE SOUTH
AND WEST 15 TO 25 NM THROUGH WEDNESDAY.

FORECAST THROUGH WEDNESDAY FOR THE BERING SEA NORTH OF NUNIVAK
ISLAND...STRONG WEST TO SOUTHWEST WINDS WILL BEGIN TO DIMINISH LATE
THIS EVENING AND SWITCH TO THE SOUTH/SOUTHEAST ON SUNDAY WHILE
BECOMING LIGHT AND VARIABLE. WINDS THEN SHIFT TO THE NORTHEAST
MONDAY MORNING AND INCREASE IN SPEED THROUGH WEDNESDAY. THE ICE EDGE
IS EXPECTED TO SHIFT TO THE WEST/SOUTHWEST 10 TO 25 NM THROUGH
WEDNESDAY.

-COOK INLET-
PKZ140-COOK INLET NORTH OF KAMISHAK BAY AND ENGLISH BAY-

COOK INLET ANALYSIS CONFIDENCE...MODERATE TO HIGH

SYNOPSIS FOR COOK INLET...AN AREA OF HIGH PRESSURE WILL BEGIN TO
SHIFT TO THE NORTHEAST ON SATURDAY ALLOWING FOR A WARM FRONT
ASSOCIATED WITH A LOW IN THE NORTH PACIFIC TO PUSH ACROSS THE AREA.
HIGH PRESSURE WILL THEN BEGIN TO BUILD BACK ACROSS THE REGION LATE
TUESDAY INTO WEDNESDAY.

THE MAIN ICE EDGE LIES FROM THE COAST NEAR 60.4N 152.3W TO 60.6N
151.8W TO 60.6N 151.6W TO 60.6N 151.4W TO 60.4N 151.4W TO 60.3N
151.5W THE ICE EDGE CONSISTS OF 1 TO 5 TENTHS NEW SEA ICE. LOW
CONCENTRATIONS OF ICE ARE ALSO PRESENT IN SHALLOW BAYS ALONG THE
WEST COAST OF LOWER COOK INLET.

FORECAST FOR COOK INLET THROUGH WEDNESDAY...NORTHERLY FLOW IS
EXPECTED TO PERSIST OVER MUCH OF THE INLET WITH TEMPERATURES SLOWLY
RISING TO NEAR NORMAL OVER THE WEEKEND. DUE TO THE NORTHERLY
WINDS...IT IS POSSIBLE THAT SOME SEA ICE MAY PASS INTO LOWER COOK
INLET...LIKELY ALONG THE COAST OF THE EAST AND WEST FORELANDS MOVING
WITH THE TIDES THROUGH WEDNESDAY. THE OVERALL ICE EDGE MAY EXPAND UP
TO 15 NM TO THE SOUTH IN LOWER COOK INLET THROUGH MONDAY.

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

$$
MCLAY



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