Sunrise 6:07 AM   Sunset 6:53 PM Moonrise 2:55 PM   Moonset 3:19 AM

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PHZ116 Kaiwi Channel- 408 Pm Hst Thu Apr 18 2024
Tonight - Northeast winds to 20 knots. Seas 4 to 6 feet. Wave detail: east northeast 5 feet at 6 seconds and north 4 feet at 10 seconds. Scattered showers. Friday - Northeast winds to 20 knots. Seas 5 to 6 feet. Wave detail: east northeast 5 feet at 5 seconds and north 3 feet at 9 seconds. Scattered showers in the morning. Isolated showers in the afternoon. Friday night - East northeast winds 15 to 20 knots. Seas 4 to 6 feet. Wave detail: east northeast 5 feet at 5 seconds and north 3 feet at 9 seconds. Isolated showers. Saturday - East northeast winds to 15 knots. Seas 4 to 5 feet. Wave detail: north northeast 5 feet at 7 seconds. Isolated showers in the morning. Saturday night - East northeast winds to 15 knots. Seas 3 to 5 feet. Wave detail: north 4 feet at 13 seconds and east northeast 3 feet at 5 seconds. Isolated showers after midnight. Sunday - East northeast winds to 15 knots. Seas 4 to 6 feet. Wave detail: north 5 feet at 13 seconds and east northeast 4 feet at 5 seconds. Sunday night - East northeast winds 15 to 20 knots. Seas 4 to 6 feet. Wave detail: east northeast 5 feet at 6 seconds and north 5 feet at 12 seconds. Isolated showers. Monday - East northeast winds to 20 knots. Seas 5 to 7 feet. Wave detail: east northeast 6 feet at 6 seconds and north 4 feet at 12 seconds. Isolated showers in the morning. Isolated showers through the day. Tuesday - East northeast winds 20 to 25 knots. Seas 5 to 7 feet. Wave detail: east northeast 6 feet at 6 seconds and north 3 feet at 10 seconds. Isolated showers after midnight.

PHZ100 408 Pm Hst Thu Apr 18 2024
Synopsis for hawaiian coastal waters - High pressure northwest of the islands and drift east during the next couple of days followed by another high building north of the state early next week.

FXHW60 PHFO 190143 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 343 PM HST Thu Apr 18 2024

SYNOPSIS
Mostly dry trade wind conditions will prevail through next week.
Breezy northeast trade winds will briefly weaken over the weekend, then become breezy again out of the east early next week. Clouds and brief showers will favor windward and mauka locations, mainly during the overnight through early morning hours, as areas of moisture move through periodically.

DISCUSSION
Mostly dry conditions will prevailing through next week as a series of surface highs build and pass north of the state. The low-level flow has shifted out of the northeast and wind speeds will become breezy by this evening. Despite the dry conditions in place, a weak upper trough and a remnant low-level moisture boundary settling south into the smaller islands are supporting scattered showers moving into windward areas of Oahu and Kauai today. High-res models show this band sagging southward overnight, bringing some additional showers to windward Maui County, before diminishing Friday.

The breezy trades will hold Friday, then ease into the light to moderate range over the weekend as a weakness forms in the surface ridge due to a low passing far to the north. The southern extent of a mid- to upper-level trough associated with this system will pass near the islands to the north late Friday into the weekend, which could support a slight increase in windward shower coverage during the overnight/early mornings. Rising upper heights along with a strengthening surface ridge to the north will support dry conditions prevailing early next week with breezy easterly trades returning.

AVIATION
Local visible imagery shows a coherent area of low-level moisture that has socked in the island of Kauai and is approaching Oahu from the east. Today's trends suggest little or no improvement can be expected for Kauai through at least the first half of tonight.
Save for a couple hours during peak heating this afternoon, IFR conditions are likely to persist. Conditions will deteriorate over windward and mauka sections of Oahu this evening. The eastern half of the state is characterized by high stability and a general dearth of moisture. Trade wind showers will be quite limited here. Moderate trades strengthen slightly for Friday.

AIRMET Sierra for IFR remains in effect for Kauai.

AIRMET Sierra for tempo mountain obscuration may be needed for Oahu later this evening.

MARINE
Moderate to fresh trades will persist through Friday weakening slightly over the weekend. Trades will become fresh to locally strong early next week.

Small surf along south facing shores expected through Tuesday. A small, long-period swell arrives Tuesday night. Small, short- period north swell will continue into early Sunday when another small, reinforcing north swell arrives through early next week.
Surf along east facing shores will remain small but can expect a minor boost as winds pick up Monday.

HFO WATCHES/WARNINGS/ADVISORIES
Small Craft Advisory until 6 PM HST Friday for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.

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Honolulu, Honolulu Harbor, Oahu Island, Hawaii, Tide feet

Hanauma Bay
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Thu -- 03:18 AM HST     Moonset
Thu -- 06:08 AM HST     Sunrise
Thu -- 07:03 AM HST     -0.01 feet Low Tide
Thu -- 12:48 PM HST     0.92 feet High Tide
Thu -- 02:53 PM HST     Moonrise
Thu -- 06:16 PM HST     0.29 feet Low Tide
Thu -- 06:51 PM HST     Sunset
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Hanauma Bay, Oahu Island, Hawaii, Tide feet

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