654
FZAK80 PAFC 200018
ICEAFC
SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
318 PM AKST WEDNESDAY 19 FEBRUARY 2020
FORECAST VALID...MONDAY 24 FEBRUARY 2020
ANALYSIS CONFIDENCE...MODERATE
SYNOPSIS...LOW PRESSURE NEAR THE ALASKA PENINSULA WILL SLIDE INTO
THE GULF OF ALASKA ON THURSDAY. A COMPACT SYSTEM MOVES INTO THE
SOUTHERN BERING SEA OVER THE WEEKEND AND QUICKLY GETS ABSORBED INTO
A STRONGER NORTH PACIFIC SYSTEM ON MONDAY.
-BEAUFORT SEA-
-CHUKCHI SEA-
-BERING SEA-
PKZ180-KUSKOKWIM DELTA AND ETOLIN STRAIT-
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-
PKZ200-NORTON SOUND-
PKZ210-DALL POINT TO WALES-
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-
PKZ165-PORT HEIDEN TO CAPE SARICHEF-
PKZ185-SAINT MATTHEW ISLAND-
PKZ412-BERING SEA OFFSHORE 171W TO 180 AND N OF 56N-
PKZ414-BERING SEA OFFSHORE EAST OF 171W-
THE MAIN SEA ICE EDGE EXTENDS FROM NEAR PORT HEIDEN TO 58.1N 160.1W
TO 58.3N 162.7W TO 57.4N 162.7W TO 58.4N 172W TO 60.2N 176W TO 60N
176.7W TO 61.1N 178.7W AND CONTINUES IN RUSSIAN WATERS. THE ICE EDGE
IS MAINLY OPEN WATER. THE RECENT NORTHERLY WINDS HAVE BROUGHT LOWER
CONCENTRATION STRIP ICE AWAY FROM THE PACK ICE.
FORECAST FOR THE BERING SEA (DAYS 1 THROUGH 5)...A LOW PRESSURE
SYSTEM NEAR THE ALASKA PENINSULA WILL CONTINUE LIGHT TO MODERATE
NORTHERLY WINDS THROUGH THURSDAY. FRIDAY WILL BRING SOME LIGHT AND
VARIABLE WINDS TO THE ICE EDGE. THE WEEKEND COULD SEE THE RETURN OF
SOUTHERLY WINDS BUT UNCERTAINTY IS A BIT HIGHER WITH THAT PARTICULAR
SYSTEM. THE ICE EDGE WILL ADVANCE 10 TO 20 NM THROUGH FRIDAY WITH
THE POSSIBILITY OF NEW GROWTH ALONG THE EDGE. OVER THE WEEKEND THE
ICE EDGE WILL RETREAT 10 TO 20 NM.
-COOK INLET-
PKZ140-COOK INLET NORTH OF KALGIN ISLAND-
ICE COVERED.
PKZ130-WEST OF BARREN ISLANDS INCLUDING KAMISHAK BAY-
PKZ138-SHELIKOF STRAIT-
PKZ139-COOK INLET KALGIN ISLAND TO PT. BEDE-
PKZ141-KACHEMAK BAY-
ANALYSIS CONFIDENCE...LOW
SYNOPSIS...ANOTHER FRONT/LOW PRESSURE SYSTEM MOVES INTO THE GULF ON
THURSDAY, THEN WEAKENS THROUGH MONDAY.
THE MAIN ICE EDGE IN COOK INLET EXTENDS FROM NEAR NINILCHIK TO 59.2N
153.7W TO 58.9N 153.2W.
FORECAST FOR COOK INLET (DAYS 1 THROUGH 5)...ALTERNATING SOUTHERLY
AND NORTHERLY WINDS THROUGH MONDAY. TEMPERATURES WILL REMAIN NEAR
NORMAL FOR THIS TIME OF YEAR, LITTLE GROWTH IS EXPECTED UNTIL THE
END OF THE WEEK WHEN COLDER TEMPERATURES RETURN. THE ICE EDGE WILL
ADVANCE 5 TO 15 NM THROUGH THURSDAY WHEN SOUTHERLY WINDS WILL MOVE
IT BACK TO THE NORTH UP TO 10 NM. LIGHT NORTHERLY WINDS RETURN FOR
THE WEEKEND WITH MOVEMENT OF THE ICE EDGE UP TO 10 NM TO THE SOUTH.
LAWSON
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