270
FXHW01 KWNH 290916
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
516 AM EDT WED APR 29 2026
VALID 00Z THU 30 APR 2026 - 00Z THU 07 MAY 2026
PERSISTENCE IN THE FORECAST AS THE CURRENT TRADE WIND PATTERN
CONTINUES THROUGH THE REST OF THE WEEK AS THE ISLAND CHAIN
SETTLES ON THE SOUTHERN BOUNDS OF A BROAD SURFACE RIDGE POSITIONED
ACROSS THE NORTHEAST PACIFIC. WINDWARD SHOWER ACTIVITY WILL
ENCROACH THE ISLANDS DUE TO PREVAILING EASTERLIES LEADING TO
ISOLATED/SCATTERED INSTANCES OF LIGHT TO MODERATE RAINFALL ACROSS
THE EASTERN HALF OF THE ISLANDS.
IN WAKE OF A PASSING TROUGH, MOISTURE LEVELS WILL DROP BACK TO
SEASONAL NORMS WHILE THE TRADES RE-ESTABLISH THE SECOND HALF OF
THE WEEK. BY THE WEEKEND, ENSEMBLE GUIDANCE IS KEYING ON A
FRONTAL APPROACH AS A LOW MIGRATES OVER THE NORTHWEST PACIFIC.
THIS SHOULD WEAKEN THE TRADE WIND FLOW, BUT THE PRESENCE OF
SEASONAL MOISTURE ANOMALIES WILL STILL ALLOW FOR DIURNALLY DRIVEN
CONVECTION EACH DAY ACROSS THE INTERIOR PORTIONS OF THE ISLAND
CHAIN SATURDAY AND BEYOND.
KLEEBAUER
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