816
FZAK80 PAFC 222244
ICEAFC
SEA ICE FORECAST FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
244 PM AKDT FRIDAY 22 OCTOBER 2021
FORECAST VALID...WEDNESDAY 27 OCTOBER 2021
ANALYSIS CONFIDENCE...HIGH TO MODERATE.
SYNOPSIS...LOW PRESSURE OVER THE SOUTHERN CHUKCHI SEA WILL GRADUALLY
WEAKEN AS IT MOVES NORTHWEST INTO THE RUSSIAN ARCTIC SATURDAY.
ANOTHER LOW WILL FORM OVER THE SOUTHERN CHUKCHI SEA AREA SUNDAY AND
MEANDER THERE THROUGH WEDNESDAY.
-BEAUFORT SEA-
-CHUKCHI SEA-
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-
ICE COVERED.
-BEAUFORT SEA-
-CHUKCHI SEA-
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-
THE MAIN ICE EDGE EXTENDS FROM NEAR CAPE LISBURNE TO 69 11'N 164
26'W TO 70 39'N 162 38'W TO 71 27'N 156 19'W TO 71 4'N 152 35'W TO
72 9'N 153 19'W TO 72 18'N 158 02'W TO 71 04'N 160 30'W TO 70 50'N
164 10'W TO 72 39'N 169 49'W TO 72 22'N 175 55'W AND CONTINUES IN
RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER. THERE IS ALSO NEW
SEA ICE WITHIN PROTECTED BAYS AND BEHIND BARRIER ISLANDS ALONG THE
ALASKA COASTLINE FROM APPROXIMATELY WALES NORTHWARD.
FORECAST FOR THE BEAUFORT SEA (DAYS 1 THROUGH 5)...WINDS WILL
GENERALLY BE NORTHEASTERLY TO NORTHERLY OVER THE WESTERN BEAUFORT
SEA THROUGH WEDNESDAY. THE EXISTING ICE PACK WILL LIKELY DRIFT 20 TO
40 NM SOUTH-SOUTHWESTWARD THROUGH WEDNESDAY, AND ADDITIONAL NEW SEA
ICE GROWTH IS LIKELY AS WELL.
FORECAST FOR THE CHUKCHI SEA (DAYS 1 THROUGH 5)...GENERALLY
NORTHERLY TO NORTHEASTERLY WINDS WILL PERSIST THROUGH WEDNESDAY.
MUCH COLDER AIR WILL BE MOVING INTO THE CHUKCHI SEA REGION THE
MIDDLE TO END OF NEXT WEEK, SO ADDITIONAL NEW SEA ICE GROWTH IS
LIKELY ESPECIALLY DURING THAT TIME. OVERALL, EXPECT THE ICE EDGE TO
MOVE 25 TO 45 NM TO THE SOUTH-SOUTHWEST THROUGH WEDNESDAY.
-BERING SEA-
PKZ200-NORTON SOUND-
PKZ210-DALL POINT TO WALES-
THERE IS SEA ICE WITHIN PROTECTED BAYS OF THE NORTHERN BERING SEA
SUCH AS NORTON BAY, GOLOVIN BAY, AND SAFETY SOUND.
FORECAST FOR THE BERING SEA (DAYS 1 THROUGH 5)...WINDS WILL SHIFT
FROM NORTHEASTERLY TO WESTERLY BY WEDNESDAY. ADDITIONAL NEW SEA ICE
GROWTH IS EXPECTED WITHIN THE PROTECTED BAYS OF NORTHERN NORTON
SOUND. AS COLDER AIR MOVES IN TOWARD THE END OF NEXT WEEK, NEW SEA
ICE FORMATION FARTHER SOUTH IS LIKELY ESPECIALLY ALONG THE YUKON
RIVER DELTA AND ALONG THE SOUTHERN EDGE OF NORTON SOUND.
SCHRECK
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