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** Important notice for upcoming changes to NWS Anchorage web site ** Read more...

FZAK80 PAFC 292244
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA 
243 PM AKDT FRIDAY 29 APRIL 2016 

FORECAST VALID...WEDNESDAY 04 MAY 2016

ANALYSIS CONFIDENCE...HIGH
                      
SYNOPSIS...A BROAD AREA OF LOW PRESSURE SOUTH OF THE ALASKA
PENINSULA WILL SLOWLY SHIFT EASTWARD OVER THE GULF OF ALASKA THROUGH
SUNDAY AND AS IT WEAKENS. A RIDGE OF HIGH PRESSURE WILL TRACK EAST
ACROSS THE BERING SEA THROUGH THE WEEKEND. ANOTHER LOW WILL MOVE
OVER THE WESTERN BERING SEA MONDAY THROUGH WEDNESDAY. 

-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-
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-
PKZ220-WALES TO CAPE THOMPSON-

ICE COVERED.

-BERING SEA-
PKZ215-KOTZEBUE SOUND-
PKZ210-DALL POINT TO WALES-
PKZ200-NORTON SOUND-
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-
PKZ180-KUSKOKWIM DELTA AND ETOLIN STRAIT-
PKZ160-BRISTOL BAY-

THE MAIN ICE EDGE IN THE BERING SEA EXTENDS FROM 61.6N 166.2W TO
63.1N 165.5W TO 60.3N 169.8W TO 59.3N 178.6W TO 60.2N 179.5E TO
62.1N 177.5W TO 62.3N 174.6W TO 62.7N 177.4W TO 61N 179.9E AND
CONTINUES IN RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.
DECAYING SHOREFAST ICE CONTINUES TO MELT FROM THE KUSKOKWIM RIVER
DELTA UP TO THE YUKON RIVER DELTA.

FORECAST THROUGH WEDNESDAY FOR THE BERING SEA...NORTHEASTERLY FLOW
WILL BECOME LIGHT AND VARIABLE SUNDAY NIGHT...THEN WILL BECOME
EASTERLY TO NORTHEASTERLY MONDAY THROUGH WEDNESDAY. WE EXPECT THE
REMAINING SEA ICE IN NORTON SOUND TO CONTINUE SHIFTING TO THE
SOUTHWEST OUT OF THE SOUND THROUGH MONDAY. FIRST YEAR ICE IN THE
MAIN HIGH CONCENTRATION ICE BELT STRETCHING FROM THE NORTH COAST OF
SAINT LAWRENCE DOWN THE EAST COAST OF SAINT LAWRENCE ISLAND AND DOWN
TO SAINT MATTHEW ISLAND WILL CONTINUE TO SPREAD APART TO THE WEST
AND SLOWLY MELT DUE TO INCREASING TEMPERATURES AS WELL AS WIND AND
WAVE ACTION. WE EXPECT ICE CONCENTRATIONS ALONG THE MAIN ICE EDGE IN
THE BERING SEA TO CONTINUE TO DECREASE THROUGH WEDNESDAY WITH THE
MOST DRAMATIC DECREASE IN CONCENTRATIONS THROUGHOUT THE MAIN ICE
PACK BETWEEN 175W AND 178W.

$$


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