310
FXHW01 KWNH 150757
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
357 AM EDT THU OCT 15 2026
VALID 00Z FRI 16 OCT 2026 - 00Z FRI 23 OCT 2026
THE GUIDANCE AGREES THAT TRADE WINDS ARE EXPECTED TO STRENGTHEN
TODAY/THURSDAY AS SURFACE HIGH PRESSURE BUILDS TO THE NORTH OF
THE ISLANDS IN A REGION OF CONFLUENCE ALOFT ON THE BACK SIDE OF AN
UPPER LEVEL TROUGH. THE ANTICYCLONE BECOMES INCREASINGLY WARM
CORE THROUGH MONDAY AS MID-LEVEL RIDGING BUILDS NORTH OF HAWAI'I.
STRONGER THAN AVERAGE TRADES ARE THEN EXPECTED TO PERSIST THROUGH
THE UPCOMING WEEKEND THROUGH EARLY NEXT WEEK, BEFORE WEAKENING MID
NEXT WEEK AS WEAK UPPER LEVEL TROUGHING RETURNS TO THE REGION. ON
FRIDAY/SATURDAY AND THEN AGAIN ON SUNDAY/MONDAY, DISTURBANCES IN
THE EASTERLIES BRING ENHANCED MOISTURE (PRECIPITABLE WATER VALUES
OF 1.5"+) WHICH SHOULD LEAD TO A RAINFALL UPTICK IN THE MAUKA
SHOWER REGIME DURING THOSE PERIODS.
ROTH
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