Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 202258
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
300 PM AKDT WEDNESDAY 20 JULY 2016

FORECAST VALID...MONDAY 25 JULY 2016

ANALYSIS CONFIDENCE...MODERATE

SYNOPSIS...HIGH PRESSURE WILL PERSIST OVER THE CHUKCHI SEA THROUGH
FRIDAY...THEN SLOWLY SHIFT EAST OVER THE BEAUFORT SEA THROUGH THE
WEEKEND. A FRONT WILL MOVE NEAR WRANGEL ISLAND SUNDAY.

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

ICE COVERED.

-BEAUFORT SEA-
-CHUKCHI SEA-
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-

THE MAIN ICE EDGE EXTENDS FROM NEAR BARROW TO 70.8N 160.4W TO 71.3N
164.2W TO 72.1N 166.3W TO 71.0N 173.6W TO 68.4N 171.1W TO THE
RUSSIAN COAST NEAR 66N 169.6W. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH MONDAY FOR THE BEAUFORT SEA...IN THE NEAR SHORE
WATERS UP TO 60 NM BEYOND THE BARRIER ISLANDS... LARGE SEA ICE FLOES
HAVE DETERIORATED LEAVING BEHIND HIGH CONCENTRATIONS OF BRASH SEA
ICE THAT IS DRIFTING WITH THE LOCAL CURRENTS AND WINDS AT THIS TIME.
THIS BRASH SEA ICE IS EXPECTED TO VERY SLOWLY START TO MELT...
DECREASING CONCENTRATIONS BY ONLY A COUPLE TENTHS BY SATURDAY.AS
WINDS BECOME NORTHEASTERLY THIS EVENING THE SEA ICE ALONG THE COAST
NEAR BARROW WILL BEGIN TO SHIFT BACK OFFSHORE. ISOLATED BRASH SEA
ICE FLOES COULD REMAIN GROUNDED FOR A FEW DAYS SLOWLY MELTING IN THE
SHALLOWS THROUGH THE END OF THE WEEK.

FORECAST THROUGH MONDAY FOR THE CHUKCHI SEA...OVER THE MAIN PACK ICE
REMAINING...NORTHEASTERLY FLOW WILL PERSIST OVER MUCH OF THE SEA ICE
THROUGH THE END OF THE WEEK. THE SEA ICE RETREAT WILL SLOW THROUGH
FRIDAY AS THE NORTHEASTERLY FLOW RETURNS. THE LARGEST ICE RETREAT IS
EXPECTED OVER THE CANYON AND CHANNEL AREAS OF THE CHUKCHI BASIN. SEA
ICE RETREAT OVER THE SHOAL REGIONS WILL BE MUCH SLOWER DURING THIS
TIME.



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