Prognostic Meteorological Discussion
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000
FXHW01 KWNH 221234
PMDHI

HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
834 AM EDT THU JUN 22 2017

VALID 00Z FRI JUN 23 2017 - 00Z FRI JUN 30 2017

A SURFACE FRONT WILL STALL WELL NORTHWEST OF THE ISLANDS LATE THIS
WEEK WHILE THE ANCHORING LOW PRESSURE SYSTEM LIFTS TOWARDS THE
GULF OF ALASKA THIS WEEKEND.  STRONG HIGH PRESSURE SETTING UP
NORTH OF HAWAI`I SATURDAY AND SUNDAY SHOULD GRADUALLY SINK
SOUTHEASTWARD AND HELP INCREASE TRADES OVER THE ISLANDS EARLY NEXT
WEEK.  ALOFT, GENERAL WEAK TROUGHING WILL REMAIN OVER HAWAI`I THIS
WEEKEND AND INTO EARLY NEXT WEEK, SANDWICHED BETWEEN UPPER RIDGING
CENTERED NEAR 170E AND OVER THE SOUTHWESTERN U.S..  ENSEMBLES WERE
GENERALLY IN GOOD AGREEMENT WITH THE LARGE SCALE PATTERN AND
INDICATED A DROP IN PRECIPITABLE WATER VALUES NEXT WEEK SUGGESTING
A LOWER CHANCE OF RAIN WHICH WAS SHOWN EXPLICITLY FROM THE LATEST
GFS/ECMWF FORECASTS.


GERHARDT


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