272
FXHW01 KWNH 270728
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
328 AM EDT WED MAY 27 2026
VALID 00Z THU 28 MAY 2026 - 00Z THU 04 JUN 2026
STRONG SURFACE HIGH PRESSURE EXPECTED TO REMAIN CENTERED TO THE
NORTH OF THE ISLANDS LATE WEEK INTO EARLY THIS WEEKEND, CENTERED
ALONG APPROXIMATELY 40N, MOVING FROM NEAR 175W INITIALLY, TO 165W
ON SATURDAY. TRADES ARE EXPECTED TO BE STRONGER THAN AVERAGE LATE
WEEK INTO EARLY THIS WEEKEND TO THE SOUTH OF THIS RIDGE,
WEAKENING BY LATE WEEKEND INTO EARLY NEXT WEEK AS AN AMPLIFYING
UPPER TROF WELL TO THE NORTH NORTHWEST OF THE ISLAND ALONG 160W
WEAKENS THE ASSOCIATED MID TO UPPER LEVEL RIDGE NORTH OF THE
ISLANDS. RE-STRENGTHENING OF THE TRADES POSSIBLE BY TUE-WED TIME
PERIOD AS THE UPPER TROF LIFTS OUT TO THE NORTHEAST AND MID TO
UPPER LEVEL HEIGHTS BUILD ACROSS THE STATE.
PW VALUES ARE EXPECTED TO REMAIN BELOW SEASONAL AVERAGES LATE THIS
WEEK INTO EARLY PARTS OF THE WEEKEND. MODEL CONSENSUS IS THEN FOR
AN INCREASE FROM EAST TO WEST IN PW VALUES OVER THE WEEKEND INTO
EARLY NEXT WEEK. THIS MAY LEAD TO HEAVIER TRADES SHOWERS BY EARLY
NEXT WEEK. PRIOR TO THIS, CLIMATOLOGICAL PRECIP DISTRIBUTION
EXPECTED ACROSS THE ISLANDS WITH POPS RANGING FROM 30-60% OVER
WINDWARD AND MAUKA LOCATIONS AND GENERALLY LESS THAN 15% ACROSS
LEEWARD AREAS.
ORAVEC
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