341
FXHW01 KWNH 250721
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
321 AM EDT WED MAR 25 2026
VALID 00Z THU 26 MAR 2026 - 00Z THU 02 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 REBUILDING OVER THE PAPAHANAUMOKUAKEA MARINE
NATIONAL MONUMENT, IT FADES MID NEXT WEEK. THIS RIDGING REMAINS
JUST OUT OF REACH FOR THE MAIN ISLANDS.
RAINFALL AMOUNTS AND RAIN CHANCES DECREASE 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
AND A SECONDARY BOUNDARY SWEEPS AROUND THE SOUTHWEST SIDE OF A LOW
PRESSURE AREA LURKING NORTHEAST OF HAWAI'I. EARLY NEXT WEEK,
RAINFALL INTENSITY SHOULD LESSEN SOMEWHAT AS THE TRADES BECOME
MORE EAST- NORTHEASTERLY AND THE CYCLONE MOVES FARTHER AFIELD.
MID NEXT WEEK, ANOTHER SLIGHT UPTICK IN AMOUNTS IS ADVERTISED BY
THE GUIDANCE, LIKELY DUE TO THE PROXIMITY OF AN UPPER LEVEL LOW
MOVING ACROSS THE MAIN ISLANDS WHICH MAY LEAD TO THE DEVELOPMENT
OF AN EASTERLY WAVE/TROUGH NOT FAR FROM HAWAI'I.
ROTH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page