652
FXHW01 KWNH 270927
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
527 AM EDT MON APR 27 2026
VALID 00Z TUE 28 APR 2026 - 00Z TUE 05 MAY 2026
PERSISTENCE IN THE FORECAST AS A PROLONGED TRADE WIND PATTERN WILL
MATERIALIZE THROUGH THE EXTENDED 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.
A SLIGHT UPTICK IN MOISTURE (PWATS INCREASING TO 1.4-1.5") WILL
CONTINUE THROUGH TUESDAY AS A WEAK SURFACE TROUGH TRAVERSES THE
ISLANDS. THIS WILL ALLOW FOR HIGHER POPS, I.E. MORE SCATTERED (VS.
ISOLATED) SHOWERS ACROSS WINDWARD SLOPES. BEHIND THE TROUGH,
MOISTURE LEVELS WILL DROP BACK TO SEASONAL NORMS WHILE THE TRADES
RE-ESTABLISH THE SECOND HALF OF NEXT WEEK.
KLEEBAUER
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page