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000
FXHW60 PHFO 240630
AFDHFO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
830 PM HST THU MAY 23 2013

.SYNOPSIS...
A TRADE WIND REGIME WILL GRADUALLY STRENGTHEN ACROSS THE
AREA...WITH POSSIBLE LOCALLY BREEZY CONDITIONS DEVELOPING BY
FRIDAY. SHOWERS WILL FAVOR WINDWARD AND MOUNTAIN AREAS. THE TRADE
WIND PATTERN IS EXPECTED TO PREVAIL THROUGH EARLY NEXT WEEK.

&&

.DISCUSSION...
A STRENGTHENING SFC HIGH CENTERED FAR NE OF THE ALOHA STATE WILL
BRING INCREASING TRADE WINDS ACROSS THE MAIN HAWAIIAN ISLANDS DURING
THE NEXT SEVERAL DAYS. LATEST WV SATELLITE IMAGERY SHOWS AN UPPER
LVL TROUGH FAR N OF THE ISLAND CHAIN...WHICH IS KEEPING TIGHTER
PRESSURE GRADIENTS AROUND 14-15 KFT. THUS...WINDS OVER THE BIG
ISLAND SUMMITS ARE STILL AROUND ADVISORY CRITERIA...FOR WHICH A WIND
ADVISORY REMAINS IN EFFECT THROUGH FRI MORNING.

GLOBAL MODELS ARE IN FAIR AGREEMENT...SHOWING THE TROUGH ALOFT
SHIFTING SE AND QUICKLY WEAKENING AS AN UPPER LVL RIDGE BUILDS TO
THE N/NW OF THE ISLANDS. MEANWHILE...THE SFC HIGH WILL EXPAND ACROSS
THE NCPAC AND BRING INCREASING TRADES THROUGH THE WEEKEND. EXPECT
LOCALLY BREEZY CONDITIONS DEVELOPING BY FRIDAY...CONTINUING THROUGH
THE REST OF THE HOLIDAY WEEKEND AND INTO EARLY NEXT WEEK.

WITH THE TRADE WIND PATTERN ESTABLISHING ACROSS THE ISLANDS...SHOWER
ACTIVITY WILL FOCUS OVER WINDWARD AND MAUKA AREAS. ENOUGH LINGERING
MOISTURE AND DAYTIME HEATING INSTABILITY WILL KEEP CHANCES FOR MORE
ACTIVE TRADE SHOWERS THROUGH FRI NIGHT.

&&

.AVIATION...
THE HAWAII TERMINALS WILL REMAIN MAINLY VFR WITH ISOLATED MVFR
CEILINGS AND VIS OVER WINDWARD AREAS. AS THE TRADE
WINDS STRENGTHEN...MODERATE LOW LEVEL TURBULENCE MAY DEVELOP
TOMORROW AND REQUIRE AN AIRMET.

&&

.MARINE...
A DECREASING S SWELL STILL LINGERS AROUND THE ISLANDS WITH SURF
ALONG S SHORES REMAINING BELOW ADVISORY LEVELS DURING THE NEXT
SEVERAL DAYS. THE NW SWELL WILL GRADUALLY DIMINISH THROUGH
THE WEEKEND.

THE TRADES WILL CONTINUE TO STRENGTHEN...NEARING OR REACHING SMALL
CRAFT ADVISORY LEVELS OVER THE WINDIER LOCATIONS NEAR MAUI COUNTY
AND THE BIG ISLAND TOMORROW.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY UNTIL 600 AM FRIDAY MORNING FOR BIG ISLAND SUMMITS.

&&

$$

DISCUSSION/MARINE...REYNES
AVIATION...MORRISON