Ice Analysis Layer: Concentration Stage Forecast  Legend

631
FZAK80 PAFC 202247
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
247 PM AKDT FRIDAY 20 OCTOBER 2017

FORECAST VALID THROUGH...WEDNESDAY 25 OCTOBER 2017

ANALYSIS CONFIDENCE...HIGH TO MODERATE

SYNOPSIS...AN UPPER LEVEL LOW WILL REMAIN IN THE VICINITY OF NORTON
SOUND THROUGH TUESDAY BEFORE MOVING TOWARD THE BERING STRAIT AND
WEAKENING BY WEDNESDAY. A WEAK SURFACE LOW OVER THE SOUTHERN
BEAUFORT SEA WILL MOVE SOUTHWEST ALONG THE ALASKA COAST TOWARD THE
BERING STRAIT THROUGH SUNDAY. MEANWHILE...HIGH PRESSURE WILL BUILD
OVER THE FAR NORTHERN CHUKCHI AND BEAUFORT SEAS THROUGH WEDNESDAY.

-ARCTIC OCEAN-
ICE COVERED.

-BEAUFORT SEA-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-
PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-

THE MAIN ICE EDGE IN THE BEAUFORT SEA EXTENDS FROM APPROXIMATELY 175
NM NORTH OF POINT BARROW TO 70.8N 141W AND CONTINUES EASTWARD INTO
CANADIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER. NEW SEA ICE HAS
ALSO BEEN NOTED ALONG THE NORTH COAST OF ALASKA UP TO 11 NM OFFSHORE
FROM POINT BARROW TO DEMARCATION POINT.

FORECAST THROUGH WEDNESDAY FOR THE BEAUFORT SEA...MODERATE EAST-
NORTHEAST WINDS WILL PERSIST THROUGH WEDNESDAY. THE MAIN ICE EDGE IS
EXPECTED TO MOVE AND EXPAND 25 TO 40 NM TOWARD THE SOUTHWEST THROUGH
WEDNESDAY. SEA ICE ALONG THE ALASKA COASTLINE IS EXPECTED TO EXPAND
OFFSHORE UP TO 10 NM THROUGH WEDNESDAY.

-CHUKCHI SEA-
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-

THE MAIN ICE EDGE IN THE CHUKCHI SEA EXTENDS FROM APPROXIMATELY 175
NM NORTH OF POINT BARROW TO 76.4N 167.7W TO 73.6N 175.2W AND
CONTINUES WESTWARD IN RUSSIAN WATERS. NEW AND YOUNG SEA ICE HAS ALSO
BEEN OBSERVED BEHIND BARRIER ISLANDS AND WITHIN PROTECTED WATERS
FROM NEAR POINT LAY TO POINT BARROW.

FORECAST THROUGH WEDNESDAY FOR THE CHUKCHI SEA...MODERATE NORTHEAST
WINDS WILL BECOME MORE VARIABLE TUESDAY INTO WEDNESDAY. THE MAIN ICE
EDGE IS EXPECTED TO MOVE AND EXPAND 25 TO 40 NM TOWARD THE SOUTHWEST
THROUGH WEDNESDAY.

-BERING SEA-
PKZ200-NORTON SOUND-
PKZ210-DALL POINT TO WALES-

NEW SEA ICE HAS BEEN OBSERVED NEAR THE YUKON RIVER DELTA AS WELL AS
WITHIN PROTECTED BAYS OF NORTHERN NORTON SOUND.

FORECAST THROUGH WEDNESDAY FOR THE BERING SEA...COLD AIR WILL REMAIN
OVER THE WEST COAST OF ALASKA THROUGH WEDNESDAY. ADDITIONAL NEW SEA
ICE MAY FORM IN SHALLOW PROTECTED LOCATIONS ALONG THE
COAST...HOWEVER WARMER SEA SURFACE TEMPERATURES WILL PROHIBIT NEW
SEA ICE FROM FORMING FARTHER OFFSHORE THROUGH WEDNESDAY.

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

NEW SEA ICE HAS BEEN OBSERVED IN UPPER KNIK ARM NEAR THE KNIK RIVER
BRIDGE.

FORECAST THROUGH WEDNESDAY FOR COOK INLET...COLD AIR WILL REMAIN
OVER THE COOK INLET REGION THROUGH WEDNESDAY. DAYTIME TEMPERATURES
MAY RISE INTO THE MID 30S BY EARLY NEXT WEEK...BUT OVERNIGHT LOWS
WILL CONTINUE TO DROP BELOW FREEZING EACH NIGHT. ADDITIONAL NEW SEA
ICE WILL LIKELY FORM IN THE UPPER PART OF KNIK ARM THROUGH
WEDNESDAY...HOWEVER WARMER SEA SURFACE TEMPERATURES WILL PROHIBIT
NEW SEA ICE FROM FORMING ELSEWHERE IN COOK INLET DURING THAT TIME.

$$

Regional Information

Downloads: Shapefile : KMZ | last updated Sat Oct 21 14:57:41 AKDT 2017

Ice Concentration	Ice Stage	5 Day Ice Forecast

 

Cook Inlet Sector

Ice Concentration	Ice Stage

 

Sea Surface Temperature Analysis

Regional Analysis

 

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