533
FXHW01 KWNH 240649
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
249 AM EDT TUE MAR 24 2026
VALID 00Z WED 25 MAR 2026 - 00Z WED 01 APR 2026
THE GUIDANCE BROADLY ADVERTISES THE PATTERN ALOFT TO REMAIN
TROUGHY OVER THE MAIN HAWAIIAN ISLANDS OVER THE NEXT WEEK, WITH
THE UPPER LEVEL TROUGH WAVERING IN STRENGTH OVER TIME, STRONGEST
ON FRIDAY AND SATURDAY. WHILE MID- LEVEL RIDGING MAKES SOME
STRIDES TOWARDS LONGER TERM REBUILDING OVER THE PAPAHANAUMOKUAKEA
MARINE NATIONAL MONUMENT, BASED ON THE RECENT GUIDANCE, SUCH
RIDGING REMAINS JUST OUT OF REACH FOR THE MAIN ISLANDS.
DUE TO BUILDING SURFACE RIDGING IN THE WAKE OF A RETREATING FRONT,
THE ANOMALOUS MOISTURE PLUME THAT HAD BEEN LURKING OVER HAWAI'I
IS SHIFTING AWAY TO THE EAST. THIS DECREASES RAINFALL AMOUNTS AND
RAIN CHANCES THROUGH THURSDAY, RETURNING HAWAI'I TOWARDS THEIR
MORE TYPICAL NORTHEAST TRADE WIND/UPSLOPE SHOWER REGIME BRIEFLY.
THERE IS SOME UPTICK IN RAINFALL INTENSITY FROM FRIDAY INTO
SATURDAY ACROSS THE CENTRAL AND EASTERN MAIN ISLANDS AS THE UPPER
TROUGH STRENGTHENS SLIGHTLY. EARLY NEXT WEEK, RAINFALL INTENSITY
SHOULD LESSEN SOMEWHAT AS THE TRADES BECOME MORE EAST-
NORTHEASTERLY.
ROTH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page