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Alaska Extended Forecast Discussion
 
(Caution: Version displayed is not the latest version. - Issued 1801Z Oct 17, 2014)
 
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Abbreviations and acronyms used in this product
 
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ALASKA EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
201 PM EDT FRI OCT 17 2014

VALID 12Z TUE OCT 21 2014 - 12Z SAT OCT 25 2014

THE SURFACE AND 500MB GRAPHICS UTILIZED THE 17/00Z ECENS MEANS AND
THE 16/12Z AND 17/00Z DETERMINISTIC ECMWF RUNS---TO FORMULATE THE
MEDIUM RANGE FORECAST FOR ALASKA.

THIS FORECAST DIRECTION ASSUMES A CORRECT ASSESSMENT OVER
NORTHEAST SIBERIA AND A SLIGHTLY SLOWER DEVELOPMENT OF---AND
EASTWARD MIGRATION OF---THE UPPER-LEVEL TROUGH ALONG THE ARCTIC
CIRCLE...BERING STRAIT AND NORTHERN BERING SEA.

IN GENERAL...THE SENSIBLE WEATHER FOCUS---WIND---CONCENTRATES
ACROSS THE PANHANDLE... PORTIONS OF THE SOUTH COAST AND ACROSS THE
NORTH. WITH RESPECT TO PRECIPITATION...THE  SOUTHERN 1/4TH OF THE
INTERIOR WILL DRY OUT DAYS 4-6...AND THE WEST COAST WILL OBSERVE A
STEADY INCREASE IN CLOUDS/POPS FROM DAY 6-8.

THE FORECAST CONTINUES TO SHOW A GRADUAL EAST-SOUTHEASTWARD
PROGRESSION OF THE SOUTHERN PORTION OF THE LONGWAVE ('A
SPLIT-FLOW') DOWNSTREAM OF THE GULF OF ALASKA---SHIFTING THE AXIS
OF HIGHER PRECIPITATION AMOUNTS AWAY FROM THE SOUTH COAST AND
PANHANDLE---TOWARDS THE WASHINGTON AND OREGON COASTS.

VOJTESAK