762
FXHW01 KWNH 210626
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
226 AM EDT SAT MAR 21 2026
VALID 00Z SUN 22 MAR 2026 - 00Z SUN 29 MAR 2026
...UNWELCOME WET PATTERN TO CONTINUE INTO MONDAY ACROSS
HAWAI'I...
AN 850MB LOW TO THE NORTH IS WORKING IN TANDEM WITH LOW LEVEL
RIDGING EAST OF HAWAI'I TO MAINTAIN A STEADFAST SWRLY LOW-LEVEL
FLOW REGIME ACROSS HAWAII TODAY AND THROUGH MONDAY. PWATS REMAIN
ABOVE THE 99TH CLIMATOLOGICAL PERCENTILE AND THE ISLANDS ARE
PLACED FAVORABLY BENEATH DIFFLUENT 250-500MB WINDS. COMBINED WITH
FAVORABLE UPSLOPE ASCENT INTO THE ISLANDS TERRAIN, EXCESSIVE
RAINFALL RATES WILL UNFORTUNATELY REMAIN IN THE FORECAST THROUGH
THE REMAINDER OF THE WEEKEND AND INTO THE FIRST HALF OF NEXT WEEK.
WITH SOILS OVERLY SATURATED AND FLOODING STILL ONGOING, HAWAII
REMAINS VULNERABLE TO ADDITIONAL LIFE-THREATENING FLASH FLOODING
AND LANDSLIDES THROUGH THE FIRST HALF OF NEXT WEEK.
AS SURFACE RIDGING BEGINS TO BUILD IN TUESDAY ONWARD TO THE NORTH
AND NORTHEAST, THE ANOMALOUS MOISTURE PLUME WILL ADVANCE NORTH
AND EAST AS WELL. THIS IS WILL FINALLY BRING A MUCH NEED TRANQUIL
PERIOD OF WEATHER FOR CLEAN UP EFFORTS FOR THE SECOND HALF OF NEXT
WEEK.
MULLINAX
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