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PHZ116 Kaiwi Channel- 915 Pm Hst Fri Sep 22 2023
Rest of tonight..Northeast winds 20 knots. Wind waves to 6 feet. Isolated showers.
Saturday..Northeast winds 20 knots. Wind waves to 6 feet. Isolated showers in the morning. Scattered showers in the afternoon.
Saturday night..East winds 20 knots. Wind waves to 6 feet. Scattered showers.
Sunday..East winds 20 knots. Wind waves to 5 feet. Isolated showers in the morning.
Sunday night..East winds 20 knots. Wind waves to 5 feet. Isolated showers.
Monday..Northeast winds 15 knots. Wind waves to 4 feet.
Monday night..East winds 20 knots. Wind waves to 5 feet. Scattered showers after midnight.
Tuesday..East winds 20 knots. Wind waves around 5 feet. SWell north 3 feet. Isolated showers.
Wednesday..East winds 20 knots. Wind waves around 6 feet. SWell north 3 feet. Scattered showers.

PHZ100 915 Pm Hst Fri Sep 22 2023
Synopsis for hawaiian coastal waters.. A broad area of surface high pressure will remain far north of state into early Sunday. A front moving down far north of the region will likely cause the trade winds to weaken slightly late Sunday and Monday. Surface high pressure is expected to build far north of the area starting next Tuesday.

FXHW60 PHFO 230635 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 835 PM HST Fri Sep 22 2023

SYNOPSIS
High pressure to the north and northwest of the islands will keep moderate to breezy trade winds in place through late next week, with only minor fluctuations in strength. Fairly typical trade wind weather will prevail, with showers favoring windward and mauka areas and a stray shower reaching leeward communities at times.

DISCUSSION
Currently at the surface, a 1027 mb high centered around 1100 miles northwest of Honolulu continues to drive moderate to locally breezy trade winds across the island chain this evening.
Infrared satellite imagery shows partly to mostly cloudy skies across the state, with cloud coverage the greatest in windward and mauka locales, particularly over the eastern islands. Radar imagery shows scattered showers moving into windward slopes and coasts, with coverage the highest over Maui County and the Big Island. Some of these showers are making it into leeward communities as well. Main short term focus revolves around trade wind trends and rain chances.

High pressure will remain anchored to the northwest of the islands during the next couple days, while a cold front drops steadily southward well to the north of the state. Little change in trade wind strength is expected tonight through the weekend, with moderate to locally breezy trade winds prevailing. The high northwest of the state will weaken and shift eastward Sunday night and Monday, while the front edges southward and closer to the island chain, eventually stalling out well north of the islands Monday night. This should ease the trades into the moderate range early next week. The high will then re-strengthen north of the islands Tuesday through late next week, bringing a return of moderate to breezy trade winds.

As for the remaining weather details, fairly typical trade wind weather will prevail during the next 7 days, although there could be a slight decrease in shower coverage Sunday afternoon through Tuesday. Overall, showers will favor windward and mauka areas through the period, particularly at night and during the early morning hours, with a few showers reaching leeward areas at times.

AVIATION
A high pressure system far northwest of the islands will keep moderate to locally breezy trade winds in the forecast through Saturday night. Passing showers are expected, mainly over the windward and mountain areas in the overnight to early morning hours. Isolated showers may reach leeward airfields during the overnight to early morning hours. MVFR conditions are possible with these showers, especially over windward airfields.

AIRMET Sierra for tempo mountain obscurations remains in effect for north through east sections of Maui and the Big Island this evening. This AIRMET may expand westward to Molokai or Oahu later tonight or early Saturday morning. This AIRMET will likely diminish by 20Z.

AIRMET Tango for moderate low level turbulence remains in effect over and south through west of island mountains. These conditions may continue through Saturday afternoon.

MARINE
A broad area of surface high pressure far north of the state will continue to produce locally strong trade winds early this weekend.
As a result, a Small Craft Advisory (SCA) remains in effect through Saturday afternoon for the typically windier waters adjacent to the islands of Maui County and the Big Island. This SCA will need to be extended into early Sunday morning based on the latest forecast. A front moving down far north of the region will likely cause the gradient to relax across the state late Sunday and Monday, so expect moderate to fresh trade winds early next week. Surface high pressure is expected to build far north of the area after Monday, so SCA conditions may return over the typically windier waters again next Tuesday and Wednesday.

The current small. long-period southwest (210 degrees) swell will continue to gradually lower through Saturday. A reinforcing small, southwest (210 degree) swell is expected to arrive by Sunday. This southwest swell energy combined with background southeast trade wind swell will likely maintain small surf along south facing shores into next week.

Surf along north and west facing shores may increase slightly from this weekend into Monday as a small, medium-period north- northwest (330 degrees) swell arrives. A small north (350-360 degrees) swell may arrive around Tuesday, followed by a small north-northeast (020 degrees) swell from Thursday into Friday.

Moderate, rough surf will likely persist through Saturday along east facing shores. The choppy surf may lower slightly along east facing shores Sunday and Monday as the trade winds weaken. Surf will likely increase again along east facing shores by the middle of next week once the trade winds become locally strong.

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

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Honolulu
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Sat -- 12:10 AM HST     Moonset
Sat -- 03:11 AM HST     0.42 feet Low Tide
Sat -- 06:20 AM HST     Sunrise
Sat -- 11:35 AM HST     2.18 feet High Tide
Sat -- 02:22 PM HST     Moonrise
Sat -- 06:26 PM HST     Sunset
Sat -- 07:35 PM HST     0.41 feet Low Tide
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Honolulu, Oahu (Hawaii), Tide feet

Waikane
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Sat -- 12:09 AM HST     Moonset
Sat -- 01:53 AM HST     0.62 feet Low Tide
Sat -- 06:20 AM HST     Sunrise
Sat -- 09:49 AM HST     2.48 feet High Tide
Sat -- 02:22 PM HST     Moonrise
Sat -- 06:17 PM HST     0.61 feet Low Tide
Sat -- 06:26 PM HST     Sunset
Sat -- 10:24 PM HST     1.04 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Waikane, Kaneohe Bay, Oahu Island, Hawaii, Tide feet

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