958
FXHW60 PHFO 201308
AFDHFO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
308 AM HST WED AUG 20 2025
SYNOPSIS
MODERATE TO LOCALLY BREEZY TRADE WINDS WILL CONTINUE THROUGH THE
REST OF THIS WEEK AS HIGH PRESSURE BUILDS OVER THE REGION. A
SUBTLE INCREASE IN WINDWARD AND MAUKA SHOWERS IS POSSIBLE TODAY,
BUT IN GENERAL, EXPECT MOSTLY DRY AND STABLE CONDITIONS INTO THE
WEEKEND.
DISCUSSION
LATEST RADAR AND SATELLITE IMAGERY THIS MORNING SHOWS SOME
SCATTERED LIGHT SHOWERS ALONG WITH SOME LOW LEVELS CLOUDS COMING
IN WITH THE TRADES. ALSO THERE IS SOME UPPER LEVEL CLOUDS
STREAMING UP FROM THE SOUTH . MODERATE TO LOCALLY BREEZY TRADES
EXPECTED TODAY, WITH SOME HIGHER GUSTS POSSIBLE. A SUBTLE PLUME OF
MOISTURE SHOULD MOVE ACROSS THE CHAIN TODAY BRINGING A SLIGHT
INCREASE IN WINDWARD AND MAUKA CLOUDS AND SHOWERS.
RIDGING SHOULD REMAIN IN PLACE FOR THE NEXT SEVERAL DAYS, WHICH
WILL CONTINUE THE BREEZY TRADES THROUGH THE END OF THE WEEK. AN
OVERALL DRY TREND WILL CONTINUE THROUGH THE REST OF THE WEEK WITH
THE TYPICAL SUMMERTIME TRADE WIND WEATHER AND DRY STABLE
CONDITIONS. WITH THE DRY AND BREEZY CONDITIONS THROUGHOUT THE REST
OF THIS WEEK AND INTO THE WEEKEND, WE COULD SEE ELEVATED FIRE
WEATHER CONCERNS, ESPECIALLY ACROSS LEEWARD AREAS.
NEXT WEEK, A PLUME OF MOISTURE EMBEDDED WITHIN THE TRADES COULD
MOVE INTO THE ISLANDS BY MONDAY OR TUESDAY, INCREASING WINDWARD
AND MAUKA CLOUDS AND SHOWERS ONCE AGAIN.
AVIATION
MODERATE TO LOCALLY BREEZY TRADES WILL PERSIST THROUGH THE
FORECAST PERIOD. LOW CIGS AND SHRA ARE POSSIBLE OVER WINDWARD AND
MAUKA AREAS. MVFR CONDS POSSIBLE IN SHRA, OTHERWISE VFR PREVAILS.
NO AIRMETS ARE IN EFFECT AT THIS TIME.
MARINE
A HIGH PRESSURE RIDGE NORTH OF THE STATE WILL KEEP FRESH TO
LOCALLY STRONG TRADE WINDS THROUGHOUT THE FORECAST PERIOD. A SMALL
CRAFT ADVISORY (SCA) REMAINS IN EFFECT FOR THE WINDIER WATERS AND
CHANNELS AROUND MAUI COUNTY AND THE BIG ISLAND THROUGH THROUGH AT
LEAST THURSDAY.
A SERIES OF SMALL, MEDIUM PERIOD SOUTH (170-190 DEGREE) SWELLS
ARE EXPECTED THROUGHOUT THE WEEK WITH SURF AROUND THE SUMMER AVERAGE
EXPECTED THROUGH AROUND SATURDAY. SURF HEIGHTS SHOULD DECREASE
SUNDAY INTO EARLY NEXT WEEK AS THESE SWELLS FADE. CHOPPY
CONDITIONS WILL CONTINUE FOR EAST-FACING SHORES THROUGH THE
FORECAST PERIOD DUE TO THE PERSISTENT FRESH TRADES. SURF ALONG
NORTH FACING SHORES WILL REMAIN NEARLY FLAT THROUGH THE FORECAST
PERIOD.
PEAK HIGH TIDES ASSOCIATED WITH THE LUNAR CYCLE WILL LEAD TO MINOR
COASTAL FLOODING ALONG SHORELINES AND LOW LYING COASTAL AREAS
DURING THE NEXT FEW AFTERNOONS. A COASTAL FLOOD STATEMENT IS IN
EFFECT FOR MINOR COASTAL FLOODING THIS WEEK.
FIRE WEATHER
MODERATE TO LOCALLY BREEZY TRADE WINDS ARE EXPECTED AS HIGH
PRESSURE BUILDS OVER THE STATE. INVERSION HEIGHTS LOOK TO BE IN
THE 5,500 TO 6,500 FOOT RANGE TODAY. DESPITE LOWEST RH VALUES
DIPPING AS LOW AS THE MID 40S DURING THE AFTERNOON HOURS EACH DAY,
WIND SPEEDS LOOK TO BE A LIMITING FACTOR, SO NOT EXPECTING ANY
FIRE WEATHER HEADLINES TODAY.
HFO WATCHES/WARNINGS/ADVISORIES
SMALL CRAFT ADVISORY UNTIL 6 PM HST THURSDAY FOR MAALAEA BAY-
PAILOLO CHANNEL-ALENUIHAHA CHANNEL-BIG ISLAND LEEWARD WATERS-BIG
ISLAND SOUTHEAST WATERS.
DISCUSSION...WALSH
AVIATION...WALSH
MARINE...BOHLIN
FIRE WEATHER...WALSH
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