Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 312235
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
230 PM AKDT FRIDAY 31 JULY 2015

FORECAST VALID...WEDNESDAY 5 AUGUST 2015

ANALYSIS CONFIDENCE...MODERATE TO HIGH

SYNOPSIS...LOW PRESSURE OVER THE BEAUFORT SEA WILL MOVE EASTWARD AND
THROUGH SUNDAY TOWARD THE EASTERN BEAUFORT SEA. ANOTHER LOW WILL
QUICKLY MOST EASTWARD ACROSS THE CHUKCHI AND BEAUFORT SEAS MONDAY
AND TUESDAY AND WILL COMBINE WITH THE OTHER LOW ON WEDNESDAY. HIGH
PRESSURE WILL MOVE OVER THE CHUKCHI SEA ON WEDNESDAY.

-ARCTIC OCEAN-
-BEAUFORT SEA-
-CHUKCHI SEA-
PKZ510-EASTERN US ARCTIC OFFSHORE-
PKZ505-CENTRAL US ARCTIC OFFSHORE-
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-

ICE COVERED.

-CHUKCHI SEA-
PKZ500-WESTERN US ARCTIC OFFSHORE-
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-

THE MAIN ICE EDGE LIES FROM THE ALASKA COAST NEAR 71.8N 159.4W TO
70.9N 161.1W TO 71.9N 165.5W TO 72.5N 161.7W TO 73.9N 179.6W TO
71.7N 179.8E TO 71.6N 176.6W TO 70.5N 177.6W AND CONTINUES IN
RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH WEDNESDAY FOR THE CHUKCHI SEA...WIND DIRECTION WILL
VARY GREATLY THROUGH WEDNESDAY AS A SERIES OF LOWS MOVES THROUGH THE
CHUKCHI SEA AND HIGH PRESSURE EVENTUALLY BUILDS IN OVER THE AREA.
DURING PERIODS OF SOUTHERLY FLOW...THE ICE WILL SHIFT BACK TO THE
NORTH AND CONSOLIDATE. DURING PERIODS OF EASTERLY FLOW...THE ICE
WILL SPREAD APART TO THE WEST. THE OVERALL ICE EDGE IS EXPECTED TO
BE MINIMAL THROUGH WEDNESDAY. HOWEVER...A DECREASE IN OVERALL
COVERAGE NEAR THE ICE EDGE IS EXPECTED AS ICE CONTINUES TO MELT
DURING THIS TIME.

-BEAUFORT SEA-
PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-

THE MAIN ICE EDGE LIES FROM NEAR THE SOUTHWEST CORNER OF BANKS
ISLAND TO THE COAST NEAR 69.2N 138.3W. THE ICE EDGE IS MAINLY OPEN
WATER.

FORECAST THROUGH WEDNESDAY FOR THE BEAUFORT SEA...WINDS WILL SHIFT
BETWEEN SOUTHERLY AND WESTERLY THROUGH MONDAY...THEN A BRIEF PERIOD
OF CALM WINDS ON TUESDAY WILL BE FOLLOWED BY WESTERLY WINDS ON
WEDNESDAY. THE OVERALL ICE EDGE IS EXPECTED TO SHIFT TO THE
NORTHEAST 5 TO 15 NM THROUGH WEDNESDAY.

$$


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