009
FZAK80 PAFC 062339
ICEAFC
SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
330 PM AKDT MONDAY 6 APRIL 2020
FORECAST VALID...SATURDAY 11 APRIL 2020
ANALYSIS CONFIDENCE...HIGH
SYNOPSIS...A LOW WILL MOVE NORTHWARD THROUGH THE WESTERN BERING SEA
THROUGH SATURDAY, AS HIGH PRESSURE SLOWLY MOVES EASTWARD ACROSS THE
SOUTHERN BERING SEA.
-BEAUFORT SEA-
-CHUKCHI SEA-
-BERING SEA-
PKZ200-NORTON SOUND-
PKZ215-KOTZEBUE SOUND-
PKZ220-WALES TO CAPE THOMPSON-
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-
PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-
ICE COVERED.
-BERING SEA-
PKZ160-BRISTOL BAY-
PKZ180-KUSKOKWIM DELTA AND ETOLIN STRAIT-
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-
PKZ185-SAINT MATTHEW ISLAND-
PKZ210-DALL POINT TO WALES-
THE MAIN SEA ICE EDGE EXTENDS FROM NEAR 57.3N 158.2W TO 58.5N 161.3W
TO 57.7N 162.7W TO 59.4N 165.9W TO 60.9N 170.7W TO 62.8N 177.7W AND
CONTINUES INTO RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER FOR
APPROXIMATELY 10 NM, THEN GENERALLY HIGH CONCENTRATION PACK ICE.
FORECAST FOR THE BERING SEA (DAYS 1 THROUGH 5)...WINDS WILL
GENERALLY BE OUT OF THE NORTH AND NORTHWEST ACROSS THE BERING SEA
THROUGH TUESDAY. WINDS THEN SHIFT TO EASTERLY THEN SOUTHERLY THROUGH
SATURDAY. NEW SEA ICE WILL GROW WHILE THE WINDS ARE NORTHERLY AND
COLD AIR IS MOVING INTO THE REGION.
ONCE WINDS BECOME SOUTHERLY, SEA ICE WILL AGAIN RETREAT NORTHWARD
WITH SOME MELTING NEAR THE ICE EDGE. POLYNYAS ON THE NORTH SIDE OF
COASTLINES WILL FILL IN EARLY THIS WEEK AND NEW ONES WILL FORM OFF
SOUTH-FACING COASTLINES, BUT ONCE THE WINDS SHIFT THOSE POLYNYAS OFF
THE SOUTH-FACING COASTLINES WILL FILL IN AND NEW ONES WILL FORM OFF
NORTH-FACING COASTLINES ONCE AGAIN. OVERALL, EXPECT SEA ICE TO
RETREAT NORTHEASTWARD 20 TO 40NM THROUGH SATURDAY.
-COOK INLET-
PKZ139-COOK INLET KALGIN ISLAND TO PT. BEDE-
PKZ140-COOK INLET NORTH OF KALGIN ISLAND-
ANALYSIS CONFIDENCE...HIGH
SYNOPSIS...A LOW WILL MOVE EASTWARD ACROSS THE GULF OF ALASKA
THROUGH WEDNESDAY, THEN HIGH PRESSURE WILL BUILD IN OVER THE COOK
INLET REGION THURSDAY THROUGH SATURDAY.
THE MAIN ICE EDGE IN COOK INLET EXTENDS FROM NEAR THE EAST FORELAND
TO 60.5N 151.5W TO 60.5N 151.8W TO 60.7N 152W. THE ICE EDGE IS
MAINLY OPEN WATER.
FORECAST FOR COOK INLET (DAYS 1 THROUGH 5)...SOUTHERLY WINDS WILL
PERSIST THROUGH TUESDAY, THEN BECOME GENERALLY LIGHT AND VARIABLE IN
NORTHERN COOK INLET AND WESTERLY IN THE SOUTHERN PART OF THE INLET
THROUGH THURSDAY. NORTHERLY WINDS WILL DEVELOP FRIDAY AND SATURDAY
THROUGHOUT THE COOK INLET REGION. WITH HIGH TEMPERATURES GRADUALLY
WARMING EACH DAY THIS WEEK AND LOWS ONLY DROPPING INTO THE 20S AT
NIGHT, SEA ICE IS EXPECTED TO CONTINUE MELTING THROUGH SATURDAY.
SCHRECK
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