Prognostic Meteorological Discussion
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000
FXHW01 KWNH 251209
PMDHI

HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
808 AM EDT SUN JUN 25 2017

VALID 00Z MON JUN 26 2017 - 00Z MON JUL 03 2017

HIGH PRESSURE WILL PERSIST OVER THE EASTERN PACIFIC BEYOND MIDWEEK
THEN BY FRIDAY-SUNDAY BUILD WESTWARD AND INCORPORATE AN
APPROACHING WESTERN-CENTRAL PACIFIC HIGH.  THIS EVOLUTION WILL
MAINTAIN TRADES THROUGH THE PERIOD.  WINDS SHOULD BE FAIRLY STRONG
THE NEXT FEW DAYS.  AROUND FRIDAY-SATURDAY THE TRADES MAY BECOME A
LITTLE LESS BRISK AS A WEAK SURFACE TROUGH CROSSES THE STATE.
THIS FEATURE WILL BE IN RESPONSE TO AN UPPER LOW WHICH GFS/ECMWF
RUNS OVER THE PAST DAY OR SO HAVE BEEN BRINGING TOWARD THE AREA
FROM THE NORTHEAST AND THEN TRACKING NORTH OF THE ISLANDS.  BY
SUNDAY TRADES SHOULD STRENGTHEN AGAIN AS THE SURFACE TROUGH PASSES
TO THE WEST.  EXPECT A DECREASE IN SHOWER ACTIVITY, TENDING TO
FOCUS OVER WINDWARD AREAS, ONCE AN UPPER LEVEL WEAKNESS DROPS
SOUTHWESTWARD AWAY FROM THE STATE SUNDAY-MONDAY.  GUIDANCE IS
CONSISTENT IN SHOWING PRECIPITABLE WATER VALUES DROPPING TO THE
1.00-1.25 INCH RANGE THROUGH MIDWEEK.  ONE OR MORE POCKETS OF
GREATER MOISTURE ARE LIKELY TO REACH THE ISLANDS BY FRIDAY-SUNDAY
BRINGING A POTENTIAL FOR AT LEAST A MODEST INCREASE OF RAINFALL.

RAUSCH

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