781
FZAK80 PAFC 222250
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
250 PM AKDT WEDNESDAY MAY 22 2013

FORECAST VALID...MONDAY MAY 27 2013

ANALYSIS CONFIDENCE...MODERATE TO HIGH.

SYNOPSIS...A LOW IN THE CENTRAL BERING SEA WILL WEAKEN AS IT TRACKS
OVER EASTERN SIBERIA LATE THURSDAY. A RIDGE OF HIGH PRESSURE WILL
BUILD OVER BRISTOL BAY LATE THURSDAY AND SPREAD ACROSS THE ALASKAN
WEST COAST FRIDAY... SHIFTING OVER THE ALASKAN NORTH SLOPE SATURDAY.
A NORTH PACIFIC LOW WILL CROSS THE CENTRAL ALEUTIANS INTO THE
SOUTHERN BERING SEA LATE FRIDAY AND WILL PERSIST IN THE SOUTHERN
BERING SEA THROUGH MONDAY.

-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.

A POLYNYA UP TO 10 NM WIDE HAS FORMED ALONG THE SHOREFAST ICE EDGE
FROM POINT BARROW TO THE EAST ALONG THE ALASKAN NORTH SLOPE.

FORECAST THROUGH MONDAY...LEADS WILL CONTINUE TO OPEN ALONG THE
NORTH AND NORTHWEST COAST 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 58.7N
164.4W TO 58.2N 170.3W TO 60.1N 175.6W TO 61.8N 176.5W TO 61.8N
177.9E AND CONTINUES ALONG THE BERING COAST OF KAMCHATKA. THE ICE
EDGE EAST OF 167W IS OPEN WATER. THE ICE EDGE WEST OF 170W IS MAINLY
4 TO 9 TENTHS NEW...YOUNG AND FIRST YEAR THIN ICE.

FORECAST THROUGH MONDAY...THE ICE WILL CONTINUE TO RETREAT TO THE
NORTH THURSDAY THROUGH FRIDAY WITH SOUTHERLY FLOW... WARMING OCEAN
SURFACE TEMPERATURES AND ADDITIONAL SPRINGTIME SUNLIGHT ALL AIDING IN
MELTING THE ICE PACK. NORTHERLY FLOW WILL RETURN SATURDAY... BECOMING
EASTERLY SUNDAY THROUGH MONDAY. THE ICE RETREAT WILL SLOW BUT STILL
CONTINUE DURING THIS TIME. THE NET ICE EDGE MOVEMENT WILL BE TO THE
NORTH 35 TO 65 NM BY MONDAY. POLYNYAS WILL OPEN ALONG NORTH AND WEST
FACING COASTS FRIDAY THROUGH SATURDAY... AND ALONG SOUTHERN AND
WESTERN FACING COASTS SUNDAY THROUGH MONDAY. SHOREFAST ICE SHOULD BE
CONSIDERED VERY UNSTABLE.

BLEGATT 2013

$$