266
FXHW01 KWNH 190925
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
525 AM EDT SAT SEP 19 2026
VALID 00Z SUN 20 SEP 2026 - 00Z SUN 27 SEP 2026
...HEAVY RAIN AND FLOODING POTENTIAL NEXT WEEK WITH T.D. 15-E
REMNANTS...
ABOVE AVERAGE MOISTURE (PRECIPITABLE WATER VALUES) ARE FORECAST
TO LINGER FOR THE WEEKEND INTO MONDAY, ALONG WITH WEAK ENERGY
ALOFT. NOTHING LOOKS TOO ORGANIZED IN TERMS OF HEAVY RAINFALL, BUT
SCATTERED SHOWERS THAT DO OCCUR COULD CONTAIN ISOLATED HEAVY
RAIN. SHOWERS COULD FOCUS IN WINDWARD/MAUKA AREAS UNDER TYPICAL
MODERATE TRADES.
BY AROUND TUESDAY, A TROPICAL DISTURBANCE WHICH WAS FORMERLY T.D.
15-E IS FORECAST TO APPROACH HAWAII FROM THE SOUTHEAST. MEANWHILE
A TROUGH NORTHWEST OF THE STATE IS FORECAST TO DIG SOUTHWARD.
THIS COMBINATION WILL INCREASE MOISTURE FURTHER IN RESPONSE, AND
PRECIPITABLE WATER VALUES COULD APPROACH 2.5" PER THE ECMWF. HEAVY
TO EXCESSIVE RAINFALL IS POSSIBLE AND FLOODING WILL BE A CONCERN.
STAY TUNED FOR FORECAST UPDATES ON THE DETAILS. THE HIGHER
MOISTURE VALUES LOOK TO CLEAR OUT LATE WEEK INTO NEXT WEEKEND.
TATE
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page