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Alaska Extended Forecast Discussion
 
(Caution: Version displayed is not the latest version. - Issued 1828Z Feb 24, 2015)
 
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ALASKA EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
128 PM EST TUE FEB 24 2015

VALID 12Z SAT FEB 28 2015 - 12Z WED MAR 04 2015

THE ALASKA MEDIUM RANGE FORECAST WAS COMPILED USING A BLEND OF THE
24/00Z ECENS/NAEFS MEANS. WITH THE 24/00Z GEFS MEAN A
SLIGHTLY-MORE-PROGRESSIVE SOLUTION FROM THE DATELINE
EASTWARD---BOTH IN THE BERING SEA AND NORTH CENTRAL PACIFIC VERSUS
THE ECENS MEANS---THOUGHT THE INCORPORATION OF THE NAEFS WILL BE A
DECENT MIDDLE-GROUND "PLACEHOLDER" FOR EMBEDDED MID-LEVEL ENERGY
INJECTING INTO THE UPPER-LEVEL TROUGH---ALONG 160W LONGITUDE.

OVERALL...THE AMPLIFICATION OF THE MID-TO UPPER-LEVEL RIDGE ALONG
140W WILL BUILD A DOME OF MILDER AIR OVER THE STATE---WITH THE
EASTWARD MIGRATION OF UPPER-LEVEL TROUGHING---GRADUALLY MODIFYING
THE WARMTH AS A MIX OF MERGING CLOUD LAYERS AND LIGHT
PRECIPITATION. THE COLD ADVECTION---APPROACHING THE STATE FROM THE
WEST AND NORTHWEST---LOOKS TO BE A TRANSITORY FEATURE OF THE
SYNOPTIC-SCALE PATTERN ON DAYS 4-5.

VOJTESAK