827
FXHW01 KWNH 220744
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
344 AM EDT MON SEP 22 2025
VALID 00Z TUE 23 SEP 2025 - 00Z TUE 30 SEP 2025
SURFACE HIGH PRESSURE AND UPPER RIDGING OVER/NORTH OF HAWAII WILL
MAINTAIN EASTERLY TRADE WINDS INTO THE EARLY PART OF THE WEEK.
WEAK TROUGHING OVER THE STATE MAY BRING A PERIOD OF RAIN AND
THUNDERSTORM CHANCES THROUGH TODAY. AFTER THIS, THERE IS GOOD
AGREEMENT IN THE GUIDANCE THAT A CUTOFF LOW WILL ADVANCE
SOUTHWESTWARD TOWARDS HAWAII MID TO LATE NEXT WEEK WHICH MAY
INCREASE MOISTURE AND RAINFALL CHANCES ACROSS THE ISLAND CHAIN
AGAIN WITH WINDS LIGHT AND VARIABLE. THIS MAY EVENTUALLY GET
ABOSORBED BY ADDITIONAL TROUGHING FROM THE WEST, WITH A POSSIBLE
COLD FRONT SWINGING THROUGH AT LEAST THE NORTHERN ISLANDS NEXT
WEEKEND.
SANTORELLI
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