National Weather Service United States Department of Commerce

Severe thunderstorms possible from the upper Midwest to the lower Mississippi Valley

Severe thunderstorms with damaging winds, a few tornadoes and some hail are expected across much of Arkansas and southern Missouri Wednesday. Isolated severe thunderstorms with damaging wind are also expected across Illinois during the day and across the lower Mississippi Valley overnight. Heavy rain with localized flooding is also possible in these areas. Read More >

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Operations Phone Line: 907.266.5138
Operations Email: nws.ar.ice@noaa.gov


Ice Analysis Layer: Concentration Stage Forecast  Legend
created:

000
FZAK80 PAFC 242329
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
330 PM AKDT MONDAY 24 APRIL 2017

FORECAST VALID...SATURDAY 29 APRIL 2017

ANALYSIS CONFIDENCE...HIGH TO MODERATE

SYNOPSIS...HIGH PRESSURE WILL PERSIST OVER THE SOUTHERN CHUKCHI AND
BEAUFORT SEAS THROUGH SATURDAY. A BROAD LOW PRESSURE SYSTEM WILL
SLOWLY MOVE EASTWARD ACROSS THE ALEUTIAN CHAIN THROUGH THURSDAY
NIGHT. ANOTHER LOW WILL ENTER THE FAR WESTERN BERING SEA ON FRIDAY.

-ARCTIC OCEAN-
-BEAUFORT SEA-
-CHUKCHI SEA-
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-
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-
PKZ200-NORTON SOUND-

ICE COVERED.

-BERING SEA-

PKZ181-NORTH AND WEST OF NUNIVAK ISLAND-
PKZ210-DALL POINT TO WALES-

ICE COVERED.

PKZ160-BRISTOL BAY-
PKZ165-PORT HEIDEN TO CAPE SARICHEF-
PKZ180-KUSKOKWIM DELTA TO ETOLIN STRAIT-
PKZ185-SAINT MATTHEW ISLAND WATERS-
PKZ412-BERING SEA OFFSHORE 171W TO 180 AND N OF 56N-
PKZ414-BERING SEA OFFSHORE EAST OF 171W-

THE MAIN ICE EDGE IN THE BERING SEA EXTENDS FROM NEAR CAPE NEWENHAM
TO 60.0N 165.2W TO 58.0N 166.9W TO 58.2N 172.5W TO 60.4N 177.0W AND
CONTINUES IN RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER. SEA
ICE ALSO REMAINS IN SHALLOW BAYS AND OTHER PROTECTED AREAS ALONG THE
BRISTOL BAY COAST.

FORECAST THROUGH SATURDAY FOR THE BERING SEA...EAST TO NORTHEAST
WINDS WILL PERSIST ALONG THE ICE EDGE THROUGH WEDNESDAY BEFORE
BECOMING LIGHT AND VARIABLE WEDNESDAY NIGHT INTO THURSDAY. WINDS
WILL THEN INCREASE OUT OF THE EAST AGAIN FRIDAY INTO SATURDAY. THE
ICE EDGE IS EXPECTED TO MOVE MAINLY WESTWARD BY 15 TO 30 NM THROUGH
SATURDAY. SEA ICE ALONG THE BRISTOL BAY COAST WILL CONTINUE TO
GRADUALLY MELT THROUGH SATURDAY.

-COOK INLET-
PKZ140-COOK INLET NORTH OF KALGIN ISLAND-

COOK INLET ANALYSIS CONFIDENCE...MODERATE TO HIGH

SYNOPSIS FOR COOK INLET...A RELATIVELY BENIGN UPPER LEVEL PATTERN
WILL PERSIST OVER SOUTHCENTRAL ALASKA THROUGH SATURDAY BETWEEN HIGH
PRESSURE TO THE EAST AND LOW PRESSURE TO THE WEST.

THE MAIN ICE EDGE IN COOK INLET EXTENDS FROM NEAR 61.0N 150.6W TO
61.1N 151.1W. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH SATURDAY FOR COOK INLET...WINDS WILL GENERALLY
REMAIN LIGHT AND VARIABLE OVER UPPER COOK INLET THROUGH SATURDAY.
DAYTIME TEMPERATURES ARE FORECAST TO BE IN THE UPPER 40S AND LOWER
50S WITH OVERNIGHT LOWS IN THE MID TO UPPER 30S.

THE REMAINING SEA ICE IN COOK INLET WILL CONTINUE TO MOVE
WITH THE TIDES AND MELT THROUGH SATURDAY.

PLEASE NOTE...COOK INLET ICE CHANGES SIGNIFICANTLY WITH THE TIDES.

$$

Regional Information

Downloads: Shapefile : KMZ | last updated Tue Apr 25 15:32:02 AKDT 2017

Ice Concentration Ice Stage 5 Day Ice Forecast

 

Cook Inlet Sector

Ice Concentration Ice Stage

 

Sea Surface Temperature Analysis

Regional Analysis

 

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