647  
FXHW01 KWNH 230631  
PMDHI  
 
HAWAII EXTENDED FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
231 AM EDT THU OCT 23 2025  
 
VALID 00Z FRI 24 OCT 2025 - 00Z FRI 31 OCT 2025  
 
HAWAII WILL GENERALLY BE ON THE SOUTHERN PERIPHERY OF THE MAIN  
SUBTROPICAL HIGH, WHICH SHOULD INITIALLY BE CENTERED NEAR 35  
DEGREES NORTH TODAY. THE HIGH REALIGNS THROUGH THE END OF THE WEEK  
AND THEN BECOMES POSITIONED NORTH OF THE STATE CLOSER TO 30  
DEGREES NORTH BY SATURDAY, AND THIS HIGH THEN MOVES OFF TOWARDS  
THE EAST THROUGH EARLY NEXT WEEK. THE ENSEMBLE MEANS SUGGEST A  
COL DEVELOPS IN THE RIDGE AXIS WITH A FRONTAL BOUNDARY APPROACHING  
THE NORTHWESTERN ISLANDS BY TUESDAY. THE GEFS MEAN MAINTAINS AN  
INVERTED SURFACE TROUGH ACROSS THE ISLANDS THROUGH WEDNESDAY  
NIGHT AND POSSIBLY INTO THURSDAY.  
 
WINDS SHOULD GENERALLY BE OUT OF THE EAST MOST DAYS, WITH SOME ENE  
COMPONENT TO THE FLOW AT TIMES. DEEP MOISTURE NEAR THE ITCZ SHOULD  
STAY SOUTH OF THE STATE THROUGH THE UPCOMING WEEK, WITH THE  
TYPICAL TRADE WIND SHOWERS EXPECTED. HOWEVER, SOME HEAVIER  
RAINFALL MAY GET CLOSE TO THE SOUTHERN PORTIONS OF THE BIG ISLAND  
SATURDAY NIGHT INTO SUNDAY, AND THIS HAS TRENDED A LITTLE MORE TO  
THE NORTH COMPARED TO YESTERDAY.  
 
HAMRICK  
 

 
 
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