Sea Ice Advisory


FZAK80 PAFC 192156
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS 
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA 
303 PM AKDT FRIDAY 17 SEPTEMBER 2014 

FORECAST VALID...WEDNESDAY 24 SEPTEMBER 2014

ANALYSIS CONFIDENCE...LOW TO MODERATE.

SYNOPSIS...HIGH PRESSURE OVER THE ARCTIC AND LOWER PRESSURE ACROSS 
ALASKA AND THE NORTHWEST CANADIAN TERRITORIES WILL PERSIST INTO 
SUNDAY, WITH MINOR VARIATIONS IN THE ORIENTATION AND STRENGTH OF THE 
PRESSURE GRADIENT. LATE SUNDAY A MODERATE LOW WILL MOVE FROM THE 
RUSSIAN FAR EAST AND TRACK OVER THE CHUCKCHI SEA BY MONDAY 
AFTERNOON. THE STORM CENTER WILL WEAKEN AND MOVE EAST, SOUTH OF THE 
ICE EDGE, TO A POINT ABOUT 125 NM NORTH OF FLAXMAN ISLAND WEDNESDAY 
AFTERNOON.
 
-ARCTIC OCEAN-

ICE COVERED.

-CHUKCHI SEA-

THE MAIN ICE EDGE LIES FROM A POINT ROUGHLY 120 NM NORTH OF BARROW 
TO 74.5N 159.3W TO 76.4N 159.0W TO 76.9N 164.0W TO 74.4N 175.6E TO 
74.4N 180 AND CONTINUES TO THE WEST IN THE RUSSIAN ARCTIC. THE ICE 
EDGE IS MAINLY OPEN WATER. 

FORECAST THROUGH WEDNESDAY FOR THE CHUKCHI SEA...MODERATE EASTERLY 
TO NORTHEASTERLY FLOW ACROSS THE ICE EDGE WILL BECOME LIGHT FRIDAY 
NIGHT AND SATURDAY. EAST FLOW WILL BECOME MODERATE SUNDAY, AND 
STRONG MONDAY THEN SLOWLY DIMINISH AND BACK TO THE NORTHWEST TUESDAY 
AND WEDNESDAY. THE REMAINING BELT OF ROTTING SEA ICE NEAR 74N IS 
EXPECTED TO MELT OUT TO SEA ICE FREE CONDITIONS BY SUNDAY. THE 
REMAINDER OF THE CHUKCHI SEA ICE EDGE IS EXPECTED TO SHIFT 20 TO 30 
NM TO THE WEST THROUGH WEDNESDAY WITH STRIPS OF ICE BEING PULLED OFF 
WEST FACING ICE PACK EDGES. 

-BEAUFORT SEA-

THE MAIN ICE EDGE LIES FROM THE SOUTHWEST COAST OF BANKS ISLAND NEAR 
72.8N 125.1W TO 71.6N 132.0W TO 71.3N 138.1W TO 73.5N 148.7W TO 
72.8N 153.6W TO A POINT ROUGHLY 120 NM NORTH OF BARROW. THE ICE EDGE 
RANGES FROM OPEN WATER TO 2 TENTHS FIRST YEAR MEDIUM...FIRST YEAR 
THIN AND OLD ICE. 
 
FORECAST THROUGH WEDNESDAY FOR THE BEAUFORT SEA...MODERATE TO STRONG 
EASTERLY TO NORTHEASTERLY FLOW WILL PERSIST OVER THE ICE EDGE 
THROUGH SUNDAY. WINDS WILL DIMINISH LATE SUNDAY AND MONDAY, THEN 
BECOME LIGHT AND VARIABLE TUESDAY. A RETURN TO LIGHT TO MODERATE 
EASTERLY FLOW IS POSSIBLE WEDNESDAY. THE ICE EDGE IS EXPECTED TO 
SHIFT 25 TO 35 NM TO THE WEST THROUGH WEDNESDAY WITH STRIPS OF ICE 
BEING PULLED OFF WEST FACING EDGES OF THE MAIN ICE PACK.