729
FXHW01 KWNH 160536
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
136 AM EDT TUE JUN 16 2026
VALID 00Z WED 17 JUN 2026 - 00Z WED 24 JUN 2026
A PAIR OF WEAK SURFACE TROUGHS; ONE TRACKING SOUTH OF HAWAII AND
ANOTHER CAUGHT BETWEEN TWO SUBTROPICAL HIGHS TO THE NORTH, WILL
GRADUALLY BEGIN TO WEAKEN TRADE WINDS LATE TUESDAY AND INTO
WEDNESDAY. THE SURFACE TROUGH TO THE SOUTH WILL USHER IN ELEVATED
PW ANOMALIES THAT DELIVER ADDITIONAL MOISTURE IN AN ENVIRONMENT
THAT WILL BE MORE SUITABLE FOR SEA BREEZE DEVELOPMENT. THIS SETUP
SHOULD LEAD TO DAILY ROUNDS OF SHOWERS AND EVEN A THUNDERSTORM OR
TWO OVER THE HIGHER TERRAIN THROUGH MID-WEEK, ALONG WITH ADDED
CLOUD COVER THROUGH THE END OF THE WEEK. AS THE SURFACE TROUGH TO
THE NORTH WEAKENS AND THE SUBTROPICAL RIDGES TO THE NORTH OVER
POWER THE TROUGH, THE PRESSURE GRADIENT WILL RESTRENGTHEN BY THIS
WEEKEND AND A STRENGTHENING FIELD OF TRADE WINDS WILL RETURN. NOT
ONLY WILL THE MORE MODERATE TRADE WINDS RETURN FOR THE WEEKEND AND
EARLY NEXT WEEK, BUT THE ELEVATED MOISTURE OVER THE STATE WILL
EXIT TO THE WEST, LEADING TO SLIGHTLY BETTER CHANCES FOR UPSLOPE
SHOWERS ALONG THE WINDWARD SIDES OF THE ISLAND CHAIN AND DRIER
CONDITIONS IN LEE OF THE MOUNTAINS.
MULLINAX
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