739
FXHW01 KWNH 160531
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
131 AM EDT WED SEP 16 2026
VALID 00Z THU 17 SEP 2026 - 00Z THU 24 SEP 2026
THE PRESSURE GRADIENT SURROUNDING HAWAII IS BEGINNING TO TIGHTEN
AND TRADE WINDS WILL INCREASE ON WEDNESDAY. AS NORBERT'S REMNANTS
ENGULF THE STATE BEGINNING WEDNESDAY NIGHT, WINDS WILL REMAIN
BRISK AND MODERATE TO HEAVY SHOWERS WILL OVERTAKE THE ENTIRE
ISLAND CHAIN FROM LATE WEDNESDAY TO AND PERSIST INTO FRIDAY. PWS
THE SECOND HALF OF THE WEEK WILL RISE BETWEEN +2-3 STANDARD
DEVIATIONS ABOVE NORMAL, AND THE INCREASE IN TRADE WINDS WILL
SUPPORT STRONGER UPSLOPE ENHANCEMENT. NORBERT'S REMNANTS WILL
LIKELY PRODUCE EXCESSIVE RAINFALL RATES ALONG MANY OF THE WINDWARD
SLOPES OF THE ISLANDS WITH FLOODING IMPACTS POSSIBLE THROUGH
FRIDAY. BY THE WEEKEND, THE BULK OF NORTBERT'S REMNANTS WILL EXIT
TO THE WEST WITH SOME RESIDUAL TROPICAL MOISTURE IN ITS WAKE
KEEPING SCATTERED SHOWERS IN THE FORECAST, AS WELL AS GUSTY WINDS.
BY NEXT WEEK, THE REMNANTS OF TROPICAL DEPRESSION FIFTEEN-E AND
ITS ANOMALOUS MOISTURE COULD MAKE ITS WAY INTO THE CENTRAL
PACIFIC EARLY NEXT WEEK. IT IS STILL TOO EARLY TO SAY WITH MUCH
CONFIDENCE WHAT IMPACTS ITS REMNANT MOISTURE MAY BRING, BUT
ANOTHER UNSETTLED PERIOD APPEARS TO BE ON THE WAY FOR HAWAII NEXT
WEEK.
MULLINAX
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