449
FXHW01 KWNH 200715
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
315 AM EDT WED MAY 20 2026
VALID 00Z THU 21 MAY 2026 - 00Z THU 28 MAY 2026
BROAD HIGH PRESSURE ANCHORED NORTH OF THE ISLANDS THROUGH THE
FORECAST PERIOD WILL MAINTAIN MODERATE TO OCCASIONALLY STRONG E-NE
TRADES. WIND SPEEDS WILL PICK UP EARLY IN THE PERIOD, POSSIBLY
REACHING ADVISORY LEVEL IN AREAS BY THU. DEEP-TROPOSPHERIC
STABILITY AND SEASONABLY DRY AIRMASS (PWAT VALUES NEAR 1.0-1.2")
WILL PERSIST AS WELL, MAINTAINING POPS NEAR CLIMATOLOGICAL NORMS
WITH THE HIGHLY-PREDICTABLE, SPATIAL AND DIURNAL DISTRIBUTION OF
FAST-MOVING TRADE SHOWERS. POPS WILL RANGE FROM 30-60% OVER
WINDWARD AND MAUKA LOCATIONS AND GENERALLY LESS THAN 15% ACROSS
LEEWARD AREAS.
HURLEY
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