Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 262220
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
220 PM AKDT WEDNESDAY 26 JULY 2017

FORECAST VALID...MONDAY 31 JULY 2017

ANALYSIS CONFIDENCE...MODERATE TO HIGH

SYNOPSIS...HIGH PRESSURE WILL BUILD OVER THE BEAUFORT SEA THROUGH
THURSDAY BEFORE SHIFTING EAST INTO CANADIAN WATERS. A FRONTAL
BOUNDARY WILL ENTER THE CHUKCHI SEA BY EARLY THURSDAY MORNING AND
CONTINUE PUSHING EASTWARD INTO THE BEAUFORT SEA ON FRIDAY AS IT
STALLS TO THE EAST OF BARROW. SEVERAL LOW PRESSURE SYSTEMS WILL
CONTINUE TO IMPACT THE CHUKCHI SEA THROUGH MONDAY AS HIGH PRESSURE
BUILDS BACK ACROSS THE BEAUFORT SEA OVER THE WEEKEND.

-ARCTIC OCEAN-
-BEAUFORT SEA-

PKZ510-EASTERN U.S. ARCTIC OFFSHORE-
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-

ICE COVERED.

-BEAUFORT SEA-

PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-

THE MAIN ICE EDGE IN THE BEAUFORT SEA EXTENDS FROM NEAR 70.2N 146.7W
TO 71.5N 147.4W TO 72.3N 151.0W TO 72.2N 147.8W TO 73.0N 144.8W TO
71.7N 139.6W TO 70.7N 138.5W TO 71.0N 135.4W AND CONTINUES IN
CANADIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH MONDAY FOR THE BEAUFORT SEA...LIGHT AND VARIABLE
WINDS WILL BECOME LIGHT TO MODERATE FROM THE SOUTH/SOUTHEAST ON
THURSDAY AND WEAKEN INTO THE WEEKEND. WINDS WILL THEN SHIFT TO THE
WEST ON SUNDAY AND CONTINUE FROM THE WEST THROUGH MONDAY. EXPECT ICE
IN NAVIGATIONAL WATERS BETWEEN POINT BARROW AND PRUDHOE BAY TO
CONTINUE TO MELT AND SHIFT 5 TO 10 NM TO THE NORTH/NORTHWEST.

-CHUKCHI SEA-
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-

THE MAIN ICE EDGE IN THE CHUKCHI SEA EXTENDS FROM NEAR 71.1N 154.8W
TO 71.4N 152.7W TO 71.8N 156.4W TO 73.1N 161.1W TO 72.4N 161.7W TO
72.3N 170.5W TO 72.8N 173.1W TO 71.0N 175.7W TO 69.7N 180 AND
CONTINUES INTO RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH MONDAY FOR THE CHUKCHI SEA...MODERATE SOUTHWESTERLY
WINDS WILL DEVELOP THURSDAY THIS EVENING NEAR WRANGELL ISLAND AND
SPREAD EASTWARD ACROSS THE CHUKCHI SEA THROUGH THURSDAY MORNING. A
PERIOD OF STRONGER WINDS WILL IMPACT THE NORTHERN ALASKA COASTLINE
LATE THURSDAY BEFORE WEAKENING FRIDAY AND INTO THE WEEKEND. WEST OF
THE BERING STRAIT WILL SEE WINDS SHIFT TO THE NORTHWEST ON FRIDAY AS
AN AREA OF LOW PRESSURE SKIRTS ACROSS THE REGION. EXPECT THE ICE
EDGE TO MOVE 5 TO 10 NM TO THE NORTH THROUGH MONDAY WITH SOME PIECES
OF ICE NEAR WRANGELL ISLAND DRIFTING TO THE SOUTH AND WEST 2 TO 5 NM
THROUGH MONDAY.


$$


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