686
FXHW01 KWNH 220826
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
426 AM EDT MON JUN 22 2026
VALID 00Z TUE 23 JUN 2026 - 00Z TUE 30 JUN 2026
FORECAST ACROSS HAWAII OVER THE NEXT WEEK WILL FEATURE A RETURN TO
STIFF EASTERLY TRADE WINDS AS WELL AS A WETTER PERIOD,
SPECIFICALLY 00Z WEDNESDAY TO 00Z THURSDAY. AN UPPER LOW IS
EXPECTED TO BECOME CUT OFF AND DRIFT NORTH OF THE ISLANDS THIS
WEEK AND HELP LIFT THE SUBTROPICAL JET NORTHWARD. A SURFACE TROUGH
CONTAINING ELEVATED MOISTURE LEVELS IS ALSO FORECAST TO TRANSIT
WESTWARD ACROSS THE STATE AND PRODUCE INCREASED RAINFALL CHANCES
EARLY-TO-MIDDLE OF THIS WEEK AND ON THE TYPICAL WINDWARD PARTS OF
THE ISLANDS. THE ECMWF EFI QPF VARIABLE CONTAIN NOTABLE VALUES
(0.6-0.8) FOR TUESDAY THROUGH EARLY THURSDAY. DETERMINISTIC
GUIDANCE FOR THE ENTIRE PERIOD HIGHLIGHT RAINFALL AMOUNTS IN THE
2-4" RANGE AND LOCALLY HIGHER IN THE TERRAIN. ADDITIONALLY, WINDS
WILL INCREASE TOWARDS MORE TYPICAL TRADES, WITH MAX GUSTS FROM THE
ECMWF OF 20-30 KTS.
SNELL
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