457  
FXHW01 KWNH 170717  
PMDHI  
 
HAWAII EXTENDED FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
317 AM EDT TUE JUN 17 2025  
 
VALID 00Z WED 18 JUN 2025 - 00Z WED 25 JUN 2025  
 
A STABLE AND DRY PATTERN LOOKS TO REMAIN IN PLACE FOR THE ISLANDS  
THROUGH THIS WEEK/WEEKEND AND INTO EARLY NEXT WEEK. AN AREA OF  
SURFACE HIGH PRESSURE WELL NORTH OF THE ISLANDS IS FORECAST TO  
SHIFT EAST- SOUTHEASTWARD EARLY IN THE PERIOD AND THEN SETTLE IN  
NORTHEAST OF THE ISLANDS. TRADE WINDS WILL BE ENHANCED THROUGH THE  
MIDDLE OF THIS WEEK AS THE HIGH PASSES DUE NORTH OF THE ISLANDS  
RESULTING IN A TIGHTER PRESSURE GRADIENT. A BRIEF PERIOD OF  
LIGHTER WINDS SHOULD EXIST LATE THIS WEEK AS THE HIGH DRIFTS AWAY  
FROM THE ISLANDS. HOWEVER, ANOTHER PERIOD OF GUSTIER WINDS LOOK TO  
RETURN THROUGH THE WEEKEND AS THE HIGH STRENGTHENS AND DRIFT BACK  
TOWARDS THE ISLANDS. GUIDANCE SUGGESTS THE HIGH WILL THEN WEAKEN  
EARLY NEXT WEEK WITH LIGHTER WINDS EXPECTED. ANY RAINFALL SHOULD  
BE LIMITED TO LIGHTER TERRAIN- ENHANCED SHOWERS MOSTLY FOR  
WINDWARD AREAS.  
 
PUTNAM  
 

 
 
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