Ice Forecast
Issued by NWS Anchorage, AK

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000
FZAK80 PAFC 210302 CCA
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
655 PM AKDT MONDAY MAY 20 2013

...CORRECTED TO ADD THE BERING SEA PORTION...

FORECAST VALID...SATURDAY MAY 20 2013

ANALYSIS CONFIDENCE...MODERATE TO HIGH.

SYNOPSIS...A STRONG LOW OVER THE BERING SEA WILL MOVE OVER THE
CHUKCHI SEA BY FRIDAY. HIGH PRESSURE WILL BUILD OVER THE NORTHERN
CHUKCHI SEA AND THE BEAUFORT SEA TUESDAY THROUGH FRIDAY. WEAK HIGH
PRESSURE WILL BUILD OVER THE BERING SEA WEDNESDAY THROUGH SATURDAY. A
DEVELOPING NORTH PACIFIC LOW WILL APPROACH THE CENTRAL ALEUTIANS
SATURDAY.

-ARCTIC OCEAN-
-BEAUFORT SEA-
-CHUKCHI SEA-
PKZ245-FLAXMAN ISLAND TO DEMARCATION POINT-
PKZ240-CAPE HALKETT TO FLAXMAN ISLAND-
PKZ235-POINT FRANKLIN TO CAPE HALKETT-
PKZ230-CAPE BEAUFORT TO POINT FRANKLIN-
PKZ225-CAPE THOMPSON TO CAPE BEAUFORT-
PKZ220-WALES TO CAPE THOMPSON-
PKZ215-KOTZEBUE SOUND-

ICE COVERED.

AN AREA OF OPEN WATER UP TO 20 NM WIDE LIES OFF THE SHOREFAST ICE TO
THE NORTHEAST OF POINT BARROW.

FORECAST THROUGH SATURDAY...LEADS WILL CONTINUE TO OPEN ALONG THE
NORTH COAST THROUGH THURSDAY.  LEADS WILL OPEN ALONG WEST FACING
COASTS THURSDAY THROUGH SATURDAY.  SHOREFAST ICE REMAINS UNSTABLE
EXCEPT WHERE GROUNDED.

-BERING SEA-
PKZ210-DALL POINT TO WALES-
PKZ200-NORTON SOUND-
PKZ185-ST MATTHEW ISLAND WATERS
PKZ180-SOUTHWEST ALASKA WATERS CAPE NEWENHAM TO DALL POINT-

THE ICE EDGE LIES FROM NEAR CAPE NEWENHAM TO 59.4N 162.6W TO 59.2N
163.6W TO 58.5N 164.1W TO 57.6N 168.9W TO 59.7N 174.2W TO 61.7N
176.9W TO 61.9N 177.9E TO 60.5N 171.6E AND CONTINUES ALONG THE BERING
COAST OF KAMCHATKA. THE ICE EDGE WEST OF 170W IS OPEN WATER. THE ICE
EDGE EAST OF 170W IS MAINLY 6 TO 9 TENTHS NEW...YOUNG AND FIRST YEAR
THIN ICE.

FORECAST THROUGH SATURDAY...THE DRAMATIC ICE RETREAT WILL CONTINUE
THROUGH WEDNESDAY THEN SLOW THROUGH SATURDAY.  THE ICE WILL MOVE TO
THE NORTH 25 TO 45 NM BY THURSDAY...THEN MOVE TO THE NORTH 15 TO 25
NM THROUGH SATURDAY. THE NET ICE MOVEMENT WILL BE TO THE NORTH 40 TO
70 NM. LEADS WILL OPEN ALONG WEST AND NORTH FACING COASTS. SHOREFAST
ICE SHOULD BE CONSIDERED VERY UNSTABLE.


KCOLE 2013

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