Ice Forecast
Issued by NWS Anchorage, AK

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FZAK80 PAFC 202204
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
230 PM AKDT MONDAY 20 APRIL 2015

FORECAST VALID...SATURDAY 25 APRIL 2015

ANALYSIS CONFIDENCE...MODERATE TO HIGH

SYNOPSIS...A LOW IS HANGING OUT AROUND ST. LAWRENCE ISLAND THROUGH
TUESDAY. A STRONG LOW IS MOVING INTO THE WESTERN BERING SEA TUESDAY
NIGHT INTO WEDNESDAY. THE LOW WILL SWING ACROSS THE BERING SEA AND
TO BRISTOL BAY FRIDAY. THE LOW WILL EXIT THE BERING SEA AND SETTLE
INTO THE GULF OF ALASKA SATURDAY. HIGH PRESSURE WILL MOVE OVER THE
BERING SEA SATURDAY WITH ANOTHER LOW DEVELOPING NEAR THE KAMCHATKA
PENINSULA.

-ARCTIC OCEAN-
-BEAUFORT SEA-
-CHUKCHI SEA-

PKZ500-WESTERN US ARCTIC OFFSHORE-
PKZ505-CENTRAL US ARCTIC OFFSHORE-
PKZ510-EASTERN US ARCTIC OFFSHORE-
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-

ICE COVERED.

-BERING SEA-

PKZ215-KOTZEBUE SOUND-
PKZ200-NORTON SOUND-
PKZ210-DALL POINT TO WALES-
PKZ180-KUSKOKWIM DELTA AND ETOLIN STRAIT-
PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-
PKZ185-SAINT MATTHEW ISLAND WATERS-

THE MAIN ICE EDGE LIES FROM NEAR CAPE NEWENHAM 58.6N 161.9W TO 58.6N
163.2W TO 57.9N 166.2W TO 57.5N 169.5W TO 57.2N 171W TO 57.3N 171.3W
TO 58.7N 175.8W TO 60.8N 180 TO 61.9N 176.6E TO 61.3N 175E AND
CONTINUES ALONG THE RUSSIAN COAST. THE ICE EDGE IS 1 TO 2 TENTHS ICE
COVERAGE IN STRIPS.

FORECAST THROUGH SATURDAY FOR THE BERING SEA...WEST TO NORTHWEST
WINDS WILL CONTINUE OVER THE BERING SEA THROUGH TUESDAY WITH
TEMPERATURES NEAR NORMAL. WINDS WILL BECOME MORE MODERATE SOUTH TO
SOUTHEAST WEDNESDAY AND THURSDAY BEFORE TURNING BACK TO THE NORTH
DURING THE DAY FRIDAY AND CONTINUING INTO SATURDAY.

THE ICE EDGE IS EXPECTED TO SHIFT TO THE SOUTH AND SOUTHWEST DURING
THE PERIODS OF MODERATE NORTHERLY FLOW TUESDAY AND AGAIN FRIDAY AND
SATURDAY. A COMPACTING OF THE ICE EDGE TO THE NORTH IS EXPECTED FOR
WEDNESDAY AND THURSDAY. THE ICE EDGE DURING THIS TIME WILL CONSIST
OF STRIPS OF ICE BUT BECOME A BIT COMPACTED ON THURSDAY IN SOUTHERLY
FLOW.

THE NET CHANGE TO THE ICE EDGE THROUGH SATURDAY IS EXPECTED TO BE 20
TO 30 NM TO THE SOUTH-SOUTHWEST... WITH THE GREATEST MOVEMENT
BETWEEN 172W AND 178W. MOST OF THE ICE EDGE 172W EASTWARD WILL SLIDE
EAST IN THE MORE WESTERLY AND SOUTHERLY FLOW THROUGH FRIDAY. SOME
MOVEMENT SOUTH OF UP TO 10 NM TO THE SOUTH CAN BE EXPECTED FRIDAY
NIGHT AND SATURDAY. THE ICE EDGE IS EXPECTED TO INCLUDE AN AREA OF
STRIPS OF ICE AND SLOWLY ROTTING ICE FLOES.

$$


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