492
FXHW60 PHFO 221945
AFDHFO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HONOLULU HI
945 AM HST WED APR 22 2026
SYNOPSIS
A LIGHT LAND AND SEA BREEZE PATTERN WILL PRODUCE AFTERNOON CLOUDS
AND SPOTTY SHOWERS OVER LAND AND PARTIAL CLEARING AT NIGHT. TRADE
WINDS WILL REDEVELOP LATE WEDNESDAY AND STRENGTHEN THURSDAY AND
FRIDAY FOCUSING RAINFALL OVER WINDWARD AND MAUKA AREAS.
SHORT TERM UPDATE
ISSUED AT 945 AM HST WED APR 22 2026
MINOR UPDATE THIS MORNING TO ALTER THE CHANCE OF RAIN ON BIG
ISLAND FOR THIS AFTERNOON. SEA BREEZE SHOULD DEVELOP PRECIPITATION
PATTERNS MUCH LIKE YESTERDAY, SO FORECAST WAS CHANGED TO BE CLOSER
TO YESTERDAY'S OBSERVED SHOWER REGIME. THIS LOWERED THE CHANCE OF
RAIN AT THE HIGHEST ELEVATIONS, AND INCREASED IT ON THE SOUTHEAST
COAST (MAINLY KAU DISTRICT AND TO A LESSER EXTENT THE PUNA
DISTRICT).
PREV DISCUSSION
ISSUED AT 341 AM HST WED APR 22 2026
NO SIGNIFICANT CHANGES TO THE FORECAST WITH THE MORNING PACKAGE.
CHANGES WERE CONFINED TO INCORPORATE THE LATEST NATIONAL BLEND OF
MODEL DATA TO THE FORECAST.
A TROUGH TO THE WEST OF THE ISLANDS IS HELPING TO KEEP LIGHT WINDS
OVER THE REGION. LIGHT WINDS OVER NIGHT RESULTED IN LAND BREEZES
THAT HAVE HELPED TO CLEAR MOST OF THE SKIES OVER THE ISLANDS. THIS
AFTERNOON WE ANTICIPATE SOME AFTERNOON SEA BREEZES THAT WILL BRING
SOME CLOUDS AND SHOWERS TO THE INTERIORS OF THE ISLANDS.
THE TROUGH IS EXPECTED TO DISSIPATE OVER THE NEXT DAY, WHICH WILL
ALLOW A SURFACE RIDGE TO SET UP NORTH OF THE ISLANDS. THIS IN TURN
WILL ALLOW TRADE WINDS TO BUILD BACK OVER THE REGION. A MID TO
UPPER RIDGE WILL LIMIT SHOWER ACTIVITY FOR THURSDAY AND FRIDAY.
OVER THE WEEKEND, MOISTURE CURRENTLY UPSTREAM THE ISLANDS WILL BE
CARRIED IN ON THE TRADE WIND FLOW. THIS WILL BRING A RETURN TO
MORE TYPICAL TRADE WIND SHOWERS OVER THE WEEKEND.
AVIATION
ISSUED AT 341 AM HST WED APR 22 2026
LAND BREEZES THIS MORNING WILL BECOME SEA BREEZES TODAY WITH
CLOUD AND SHOWER BUILDUPS OVER INTERIOR AREAS. NORTHEASTERLY TRADE
WINDS WILL THEN FILL IN BY THE EVENING. ONCE THE TRADE WINDS
RETURN, SHOWERS WILL RETURN TO FOCUSING OVER WINDWARD AND MOUNTAIN
AREAS. VFR CONDITIONS WILL PREVAIL WITH BRIEF MVFR CONDITIONS ANY
IN SHOWERS.
NO AIRMETS IN EFFECT.
MARINE
ISSUED AT 945 AM HST WED APR 22 2026
LIGHT COASTAL SEA BREEZES WILL DEVELOP LATER THIS MORNING WITH
LIGHT TRADES GRADUALLY RETURNING THIS EVENING INTO THURSDAY AS A
RIDGE OF HIGH PRESSURE BUILDS NORTH OF THE STATE. MODERATE TO
LOCALLY FRESH TRADES WILL BE THE DOMINANT WIND FROM THURSDAY
THROUGH THE WEEKEND. BRIEF PERIODS OF LOCALLY STRONG WINDS WILL BE
POSSIBLE OVER THE WINDIER AREAS AROUND MAUI COUNTY AND THE BIG
ISLAND DURING THIS TIME.
A SMALL, MEDIUM PERIOD, WEST NORTHWEST TO NORTHWEST SWELL HAS LEVELED
OUT THIS MORNING AND WILL GRADUALLY DECLINE THE NEXT FEW DAYS.
A MODERATE SIZE, MEDIUM PERIOD NORTH NORTHEAST SWELL IS ARRIVING
THIS MORNING AND WILL PEAK LATER TODAY WITH SURF HEIGHTS ABOVE
ADVISORY THRESHOLDS FOR EAST FACING SHORES. THIS SWELL WILL ALSO
PRODUCE ABOVE ABOVE AVERAGE SURF ALONG SELECT WEST FACING SHORES
ALONG MAUI AND THE BIG ISLAND NEAR KUA BAY. THIS SWELL WILL SLOWLY
DECLINE THROUGH THE REMAINDER OF THE WEEK. STRENGTHENING TRADES
LATER THIS WEEK WILL SUPPORT CLOSER TO SEASONAL AVERAGE SURF FOR
EASTERN EXPOSURES THIS WEEKEND.
SMALL WESTERLY ENERGY FROM FORMER SUPER TYPHOON SINLAKU IS
EXPECTED TO COME THROUGH THE NEXT COUPLE OF DAYS. THIS SWELL MAY
LIFT SURF ALONG BETTER WESTERN EXPOSURES FROM TODAY THROUGH THE
END OF THE WEEK.
HFO WATCHES/WARNINGS/ADVISORIES
HIGH SURF ADVISORY UNTIL 6 AM HST THURSDAY FOR BIG ISLAND EAST-
BIG ISLAND NORTH-BIG ISLAND SOUTHEAST-KIPAHULU-KOOLAU WINDWARD-
MOLOKAI SOUTHEAST-MOLOKAI WINDWARD-OLOMANA-WINDWARD HALEAKALA.
DISCUSSION...M BALLARD
AVIATION...TSAMOUS
MARINE...KINO
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