801
FXHW01 KWNH 150509
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
109 AM EDT TUE SEP 15 2026
VALID 00Z WED 16 SEP 2026 - 00Z WED 23 SEP 2026
AFTER A TRANQUIL PATTERN TO START THE WEEK, THE PRESSURE GRADIENT
BEGINS TO TIGHTEN AND TRADE WINDS LOOK TO INCREASE MID-WEEK. AS
NORBERT'S REMNANTS APPROACH THE BIG ISLAND AND MAUI, WINDS WILL
REMAIN BRISK AND SHOWERS WILL OVERTAKE MUCH OF THE STATE FROM
LATE WEDNESDAY TO FRIDAY. PWS BY WEDNESDAY NIGHT AND THROUGH
FRIDAY RISE TO AS HIGH AS +2.0 STANDARD DEVIATIONS ABOVE NORMAL,
AND THE INCREASE IN TRADES 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. 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.
FOCUS SHIFTS TO TROPICAL DEPRESSION FIFTEEN-E FOR NEXT WEEK AS
ITS ANOMALOUS MOISTURE SOURCE COULD MAKE ITS WAY INTO THE CENTRAL
PACIFIC EARLY NEXT WEEK. IT IS TOO EARLY TO SAY WITH MUCH
CONFIDENCE WHAT IMPACTS ITS REMNANT MOISTURE MAY BRING, BUT
ANOTHER UNSETTLED PERIOD COULD BE ON THE WAY FOR HAWAII NEXT WEEK.
MULLINAX
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