Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 192152
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
230 PM AKDT WEDNESDAY 19 JULY 2017

FORECAST VALID...MONDAY 24 JULY 2017

ANALYSIS CONFIDENCE...MODERATE TO HIGH

SYNOPSIS...HIGH PRESSURE OVER THE BEAUFORT SEA WILL BUILD FROM THE
WEST THROUGH FRIDAY...AS LOW PRESSURE WILL MOVE EASTWARD THROUGH THE
CHUKCHI SEA AND BEAUFORT SEA SATURDAY AND SUNDAY. A WEATHER FRONT
EXTENDING SOUTH FROM THIS LOW WILL CAUSE WINDS TO RAPIDLY CHANGE
FROM SOUTHEASTERLY TO WEST/NORTHWESTERLY AS IT PASSES.

-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 71.1N 148.6W TO 71.1N 142.5W TO 72.4N 149.7W TO 72.5N 144.3W TO
71.4N 138.8W AND CONTINUES IN CANADIAN WATERS. THE ICE EDGE IS
MAINLY OPEN WATER.

FORECAST THROUGH SATURDAY FOR THE BEAUFORT SEA...WESTERLY WINDS WILL
GRADUALLY BECOME NORTHWESTERLY THROUGH SATURDAY. WINDS WILL BECOME
SOUTHERLY SATURDAY. WINDS WILL RAPIDLY BECOME WESTERLY TO
NORTHWESTERLY SUNDAY AND MONDAY...SEA ICE FLOES WITHIN 20 NM OF THE
BARRIER ISLANDS WILL CONTINUE TO SPREAD APART AND CLEAR NAVIGATIONAL
WATERS VERY NEAR TO THE BARRIER ISLANDS. THE MAIN ICE EDGE IN THE
EASTERN BEAUFORT SEA WILL SHIFT 10 NM TO THE EAST THROUGH MONDAY.

-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 POINT BARROW
TO 72.9N 161.7W TO 72.5N 175.1W AND CONTINUES IN RUSSIAN WATERS. THE
ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH SATURDAY FOR THE CHUKCHI SEA...EASTERLY WINDS WILL
BECOME SOUTHEASTERLY THROUGH FRIDAY THEN BECOME WESTERLY TO
SOUTHWESTERLY THROUGH MONDAY. THE MAIN ICE EDGE IS EXPECTED TO SHIFT
10 NM SOUTH THROUGH MONDAY.

$$



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