458
FXHW01 KWNH 140759
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
359 AM EDT MON APR 14 2025
VALID 00Z TUE 15 APR 2025 - 00Z TUE 22 APR 2025
MODERATE TO BREEZY EASTERLY TRADES OVER HAWAII SHOULD CONTINUE
MONDAY AND SLOWLY WEAKEN ON TUESDAY. A WEAK LOW ALOFT COULD ALLOW
FOR A BIT OF INSTABILITY FOR A SHOWERY PATTERN, WITH THE SHOWERS
FAVORING WINDWARD AND MAUKA AREAS.
A LARGE TROUGH ALOFT WILL APPROACH WEST OF THE STATE INTO
MIDWEEK. MEAN WINDS SHOULD VEER MORE SOUTHERLY IN RESPONSE TO THE
TROUGH, BUT ARE LIKELY TO BE WEAK ENOUGH AT THE SURFACE THAT LAND
AND SEA BREEZES DOMINATE THE PATTERN. THE UPPER TROUGH WILL PUSH A
SURFACE COLD FRONT THAT STALLS WEST OF THE STATE FOR THE LATTER
HALF OF THE WEEK. AHEAD OF THE FRONT, MOISTURE WILL BE DRAWN
NORTHWARD ATOP THE ISLANDS AND INCREASE SHOWER COVERAGE.
PRECIPITABLE WATER VALUES COULD REACH OVER THE 90TH PERCENTILE FOR
THIS TIME OF YEAR AT TIMES. THE WETTER PATTERN IS FORECAST TO
BEGIN IN THE WESTERN ISLANDS WEDNESDAY AND PEAK ACROSS THE STATE
THURSDAY-FRIDAY. OVER THE WEEKEND, TRADES MAY START TO RETURN, BUT
A HYBRID LAND/SEA BREEZE AND TRADE PATTERN MAY CONTINUE UNTIL
EARLY NEXT WEEK WHILE SOME MOISTURE LINGERS.
TATE
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