Heavy rain and flash flooding possible in portions of the Southwest this weekend

An upper-level low in the Southwest U.S. will act as a trigger for thunderstorms this weekend. The area of greatest concern is in New Mexico, southeast Utah and portions of southern Colorado. Storms will be slow moving and could bring several rounds of rain to the same areas. Rainfall amounts may exceed 3 inches in localized areas. Flash Flood Watches are in effect. Read More >

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

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Ice Analysis Layer: Concentration Stage Forecast

Legend

created:

000
FZAK80 PAFC 182130
ICEAFC

SEA ICE ADVISORY FOR WESTERN AND ARCTIC ALASKAN COASTAL WATERS
NATIONAL WEATHER SERVICE ANCHORAGE ALASKA
130 PM AKDT FRIDAY 18 AUGUST 2017

FORECAST VALID...WEDNESDAY 23 AUGUST 2017

ANALYSIS CONFIDENCE...HIGH

SYNOPSIS...LOW PRESSURE OVER THE NORTHERN BEAUFORT SEA WILL DEPART
INTO THE HIGH ARCTIC BY SATURDAY MORNING. HIGH PRESSURE WILL THEN
BUILD OVER THE BEAUFORT DURING THE WEEKEND AND DRIFT EAST TOWARDS
BANKS ISLAND THROUGH WEDNESDAY. WEAK LOW PRESSURE LOOKS TO ENTER THE
SOUTHERN CHUKCHI SEA ON MONDAY...ALTHOUGH GENERALLY WEAK FLOW IS
EXPECTED THROUGH WEDNESDAY IN THE ABSENCE OF ANY WELL DEFINED
SURFACE FEATURES.

-ARCTIC OCEAN-
ICE COVERED.

-BEAUFORT SEA-
PKZ510-EASTERN U.S. ARCTIC OFFSHORE-
PKZ505-CENTRAL U.S. ARCTIC OFFSHORE-

THE MAIN ICE EDGE IN THE BEAUFORT SEA CONTINUES FROM CANADIAN WATERS
AT 71.5N 135.0W TO 71.6N 143.8W TO 76.4N 146.5W TO 75.7N 157.4W AND
CONTINUES INTO THE CHUKCHI SEA. THE ICE EDGE IS MAINLY OPEN WATER.
THERE IS ALSO AN AREA OF BRASH SEA ICE LOCATED BETWEEN 72.8N AND
73.8N AND 150.0W AND 154.0W.

FORECAST THROUGH WEDNESDAY FOR THE BEAUFORT SEA...WESTERLY WINDS
ALONG THE ICE EDGE WILL BECOME LIGHT AND VARIABLE BY SATURDAY...THEN
SHIFT TO THE EAST-SOUTHEAST TUESDAY INTO WEDNESDAY. THE ICE EDGE IS
EXPECTED TO RETREAT TO THE NORTH BY UP TO 10 NM THROUGH WEDNESDAY.
THE AREA OF BRASH ICE WILL LIKELY MELT OUT BY WEDNESDAY.

-CHUKCHI SEA-
PKZ500-WESTERN U.S. ARCTIC OFFSHORE-

THE MAIN ICE EDGE IN THE CHUKCHI SEA CONTINUES FROM THE BEAUFORT SEA
AT 75.7N 157.4W TO 73.0N 169.3W TO 72.7N 179.0W AND CONTINUES IN
RUSSIAN WATERS. THE ICE EDGE IS MAINLY OPEN WATER.

FORECAST THROUGH WEDNESDAY FOR THE CHUKCHI SEA...GENERALLY LIGHT AND
VARIABLE FLOW IS EXPECTED TO PERSIST OVER THE ICE EDGE THROUGH
WEDNESDAY. THE ICE EDGE WILL CONTINUE TO RETREAT TO THE NORTH BY BY
UP TO 10 NM THROUGH WEDNESDAY...WITH CONTINUED MELTING WITHIN THE
ICE PACK.

$$

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