Sunrise 5:50 AM   Sunset 7:07 PM Moonrise 5:50 PM   Moonset 4:27 AM

  Print   HELP   Reset   Save   Recall  New

PHZ114 Oahu Windward Waters- 337 Am Hst Tue May 21 2024
Today - East winds 15 to 20 knots. Seas 5 to 6 feet. Wave detail: east 5 feet at 7 seconds. Isolated showers this morning. Tonight - East winds 15 to 20 knots. Seas 6 to 7 feet. Wave detail: east 6 feet at 7 seconds. Isolated showers in the evening, then scattered showers after midnight. Wednesday - East winds 15 to 20 knots. Seas 6 to 7 feet. Wave detail: east 6 feet at 8 seconds. Scattered showers, mainly in the morning. Wednesday night - East winds to 20 knots. Seas 6 to 7 feet. Wave detail: east 6 feet at 8 seconds. Isolated showers in the evening, then scattered showers after midnight. Thursday - East winds to 20 knots. Seas 6 to 7 feet. Wave detail: east 6 feet at 8 seconds. Scattered showers, mainly in the morning. Thursday night - East winds to 20 knots. Seas 6 to 7 feet. Wave detail: east 6 feet at 8 seconds. Isolated showers in the evening, then scattered showers after midnight. Friday - East winds to 20 knots. Seas to 6 feet. Wave detail: east 6 feet at 8 seconds. Scattered showers in the morning, then isolated showers through the night. Scattered showers after midnight. Saturday - East winds 15 to 20 knots. Seas 5 to 6 feet. Wave detail: east 5 feet at 7 seconds. Scattered showers in the morning, then isolated showers through the night. Scattered showers after midnight.

PHZ100 337 Am Hst Tue May 21 2024
Synopsis for hawaiian coastal waters - A strong high far northeast of the state will produce fresh to locally strong trade winds over the eastern half of the state and moderate trades over the western half of the state today. Easterly trade winds will strengthen over the western waters from Thursday onward.

FXHW60 PHFO 211302 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 302 AM HST Tue May 21 2024

SYNOPSIS
Moderate to locally breezy trades will hold over the eastern islands during the next couple days, while lighter trades allow for some localized land and sea breezes over the western end of the state. Showers will favor windward and mauka areas overnight and during the morning hours, with a few showers developing over interior and leeward sections each afternoon and evening. A more typical moderate to breezy trade wind pattern will overspread the state Wednesday night or Thursday and linger through early next week, with showers favoring windward and mauka areas, along with the occasional leeward spillover.

DISCUSSION
Currently at the surface, a trough of low pressure is located around 300 miles west-northwest of Kauai, while a 1035 mb high is centered around 1600 miles north-northeast of Honolulu. Moderate to locally breezy trade winds prevail over the eastern islands, while light to moderate trades remain over the western end of the state. Infrared satellite imagery shows a mix of high and low clouds bringing mostly cloudy conditions to the state this morning. Radar imagery shows relatively dry conditions across the state, with only a few showers moving into windward areas. Main short term focus revolves around rain chances and trade wind trends during the next couple days.

The trough to the west-northwest of the state will gradually shift westward and further away from the islands during the next couple days. This will allow the trade winds to gradually strengthen from east to west across the islands, with moderate to breezy conditions expected statewide by Thursday. The gradient will likely be light enough today and Wednesday, to allow some localized leeward sea breezes in the most sheltered areas over Kauai and Oahu. A series of reinforcing highs will build north of the state Friday through early next week, while the trough continues to shift further west and away from the area. This will maintain moderate to breezy trade winds across the island chain.

As for the remaining weather details, fairly dry conditions should prevail this morning, with light showers limited mainly to windward slopes and coasts. A band of moisture appears to move in from the east this afternoon, bringing an increase in trade wind showers to the eastern end of the state. Additionally, a few leeward and interior showers will be possible over the western islands and leeward Big Island during the afternoon. Showers should diminish quickly over leeward areas this evening, with showers focusing over windward terrain tonight into Wednesday morning. Localized sea breezes may then allow for some leeward shower development again Wednesday afternoon. Beginning Wednesday night or Thursday, we should see a transition over to a more typical trade wind pattern featuring mainly windward/mauka showers and the occasional leeward spillover, with showers most prevalent in the overnight and early morning hours. This pattern should hold through early next week.

AVIATION
Light to moderate east to southeast winds will persist through the 24-Hr forecast period. Despite the lack of windward showers, MVFR CIGs associated with a stable low cloud deck will remain possible through the early morning hours over the eastern end of the state. A few leeward showers are possible this afternoon where localized sea breezes form. Otherwise, VFR conditions will prevail.

AIRMET Sierra is in effect for mountain obscuration over the windward slopes of the Big Island and Maui. Conditions should improve through the mid- to late-morning hours.

MARINE
An area of low pressure west to northwest of the state will slowly drift westward away from the islands through much of this week.
High pressure will slowly build into the Hawaii region with a slight strengthening of easterly trade winds as this low pressure trough moves away from the state. Expect fresh to locally strong easterly trade winds over the eastern waters and gentle to fresh east-southeast winds over western waters today. Easterly trade winds will strengthen over the western waters from Thursday onward. A Small Craft Advisory (SCA) remains in effect for the windier coastal waters around Maui County and the Big Island through Wednesday. The SCA will likely continue for some of these eastern windier waters through the end of the week.

Surf along south-facing shores will continue to gradually decline over the next few days. Only small long period background south swell pulses are expected from Tasman Sea sources over the next seven days. Surf along east facing shores should see a gradual rise over the next few days as the trades strengthen upstream of the state. Surf heights along north and west facing shores will remain small with a slight bump up from Sunday into Monday.

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

toggle option: (graph/table)

Haleiwa
Click for Map
Tue -- 01:05 AM HST     0.60 feet High Tide
Tue -- 04:27 AM HST     Moonset
Tue -- 05:51 AM HST     Sunrise
Tue -- 05:54 AM HST     -0.18 feet Low Tide
Tue -- 02:19 PM HST     1.53 feet High Tide
Tue -- 05:49 PM HST     Moonrise
Tue -- 07:07 PM HST     Sunset
Tue -- 08:18 PM HST     0.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Haleiwa, Waialua Bay, Oahu Island, Hawaii, Tide feet

Laie Bay
Click for Map
Tue -- 12:21 AM HST     0.84 feet High Tide
Tue -- 04:26 AM HST     Moonset
Tue -- 05:50 AM HST     Sunrise
Tue -- 06:13 AM HST     -0.12 feet Low Tide
Tue -- 01:36 PM HST     2.01 feet High Tide
Tue -- 05:49 PM HST     Moonrise
Tue -- 07:06 PM HST     Sunset
Tue -- 08:37 PM HST     0.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Laie Bay, Oahu Island, Hawaii, Tide feet

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Molokai/Honolulu,HI