Sunrise 6:09 AM   Sunset 6:53 PM Moonrise 1:35 PM   Moonset 2:22 AM

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FXHW60 PHFO 180151 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 351 PM HST Wed Apr 17 2024

SYNOPSIS
Mostly dry and pleasant conditions will prevail into next week.
Trade winds will strengthen through Thursday and continue into next week, with a slight weakening Saturday. Showers will be minimal, but any incoming precipitation will focus windward and mauka.

DISCUSSION
Water vapor imagery shows an upper low over the western end of the state late this afternoon. High pressure at the surface is centered far to the northwest resulting in moderate northeast trade winds across the state. Visible satellite shows cloud build ups over the island interiors, but with trades expected to strengthen as the driving high moves closer, most of the cloud cover will shift to windward and mauka areas beginning tonight.

Upstream showery clouds may moving in from the north northwest tonight into Thursday morning and possibly bring a few showers along windward slopes, but precipitation amounts will be minimal.
Trades will become moderate to fresh Thursday into Friday with isolated windward showers as the airmass continues to be dry and stable into next week. Winds will briefly taper off Saturday, but will veer easterly and strengthen again to fresh breezes Sunday into the first half of next week.

AVIATION
Light to locally moderate north to northeast flow will gradually shift more northeasterly and strengthen on Thursday. While VFR conditions will dominate over most areas through Thursday, an area of shallow moisture may produce MVFR ceilings over northern and windward slopes of Kauai tonight and spread to Oahu early Thursday. No AIRMETs are in effect at this time, though we will need to monitor Kauai in the short term.

MARINE
Moderate NE trades persist through the forecast period possibly strengthening slightly during the weekend.

Small surf along S facing shores hold through Thursday as overlapping S swells maintain elevated surf through the end of the week. The current NW swell becomes increasingly N as it gradually subsides through Thursday. A small N swell will bring a modest bump to exposed shorelines during the latter half of the weekend. Surf along E facing shores remains small.

HFO WATCHES/WARNINGS/ADVISORIES
None.

East Island, French Frigate Shoals, Hawaii, Tide feet

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