Monday, June21, 2021
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Marine Weather and Tides
Haiku-Pauwela, HI

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 5:44AMSunset 7:10PM Sunday June 20, 2021 8:33 PM HST (06:33 UTC) Moonrise 3:12PMMoonset 2:13AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PHZ119 Maalaea Bay- 327 Pm Hst Sun Jun 20 2021
Tonight..North winds 15 knots. Wind waves 2 feet or less.
Monday..Northeast winds 10 knots veering southeast in the afternoon. Wind waves 2 feet or less.
Monday night..Northeast winds 15 knots. Wind waves 2 feet or less.
Tuesday..Northeast winds 15 knots in the morning becoming variable less than 10 knots. Wind waves 2 feet or less.
Tuesday night..Winds variable less than 10 knots. Wind waves 2 feet or less.
Wednesday..Winds variable less than 10 knots. Wind waves 2 feet or less.
Wednesday night..Northeast winds 10 knots in the evening becoming variable less than 10 knots. Wind waves 2 feet or less.
Thursday..Winds variable less than 10 knots. Wind waves 2 feet or less.
Friday..Winds variable less than 10 knots. Wind waves 2 feet or less.
PHZ100 327 Pm Hst Sun Jun 20 2021
Synopsis for hawaiian coastal waters.. A surface ridge of high pressure currently well north of kauai will move south and stall over the northern offshore waters by Wednesday. Expect light to moderate trade winds to become light after Wednesday.


7 Day Forecast for Marine Location Near Haiku-Pauwela, HI
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location: 20.92, -156.28     debug


Area Discussion for -
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FXHW60 PHFO 210237 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 437 PM HST Sun Jun 20 2021

UPDATE. Recent surf observations and buoy readings show that surf along south facing shores will rise over the next several hours. As a result, a High Surf Advisory has been issued for all islands. The advisory runs through the night, and surf will drop to border line advisory levels Monday morning.

SYNOPSIS. Gentle to moderate trade winds will remain in place for the next few days, then decline around midweek as the surface ridge north of the state weakens. Showers will remain focused along windward slopes, though a lingering disturbance aloft will maintain clouds and spotty showers over the Kona slopes into this evening. Stable and drier conditions are expected during the work week.

PREV DISCUSSION. /ISSUED 333 PM HST Sun Jun 20 2021/

A slightly unstable trade wind flow continues to produce limited rainfall over windward slopes and spotty showers over leeward terrain. A surface ridge roughly 700 miles north of Kauai is driving the moderate trade winds. A weak and compact upper level low centered about 400 miles northeast of the islands is drifting away, and a trailing upper level trough running over the western end of the state is generating high clouds and is leaving some instability. As a result, isolated showers have flared over sheltered leeward terrain, especially on the Big Island and Kauai. These showers will dissipate by sunset, except over the Kona slopes of the Big Island which could see additional showers this evening. Windward rainfall has been limited today.

Trades will hold at gentle to moderate strength Monday and Tuesday, then ease on Wednesday and Thursday as the surface ridge to the north weakens and is pushed closer to the state. Expect leeward sea breezes to become more widespread as the trades ease. However, the atmosphere will become increasingly stable and high clouds will dissipate by Monday as the upper level trough is displaced by an upper level ridge building in from the east. This points to limited windward showers and dry conditions leeward. The exception will be typical summertime clouds and showers over the Kona slopes of the Big Island each afternoon and evening. Trade winds will likely strengthen next weekend.

AVIATION. High pressure northeast of the state will keep gentle to moderate easterly trade winds in place tonight and tomorrow before weakening even more by mid-week. This afternoon, some localized sea breezes have allowed clouds and showers to form over sheltered leeward areas, especially on the Big Island and Kauai. However, most shower activity will continue to favor windward slopes and coasts, particularly during the overnight and early morning hours. During the day tomorrow, increasing stability in the wake of an exiting low aloft will begin to favor drier conditions than those experienced over the past couple of days. VFR conditions are expected to prevail throughout the forecast period with only temporary MVFR ceilings and visibility in any heavier showers that occur.

There are currently no AIRMETs in effect.

MARINE. Light to moderate trade winds are expected to persist well into the new week as a surface high remains far northeast of the islands. The associated surface ridge will slowly move south through the week to a position just outside the northern offshore waters. Therefore, trades will be trending down to mainly light by Thursday. The ridge is expected to shift back north on Friday, allowing trades to increase again.

The current south swell is forecast to peak tonight just below advisory level before gradually subsiding through Monday. Smaller swells will keep surf from going flat through the upcoming week. A few small northwest swells will move through this week. East shore surf will decline a bit later in the week as trades weaken, but get another boost Friday into the weekend as trades pick back up.

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Advisory until 6 AM HST Monday for south facing shores of all islands.



DISCUSSION . Wroe AVIATION . Vaughan MARINE . TS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51205 10 mi38 min 78°F4 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 10 mi46 min ENE 11 G 14 77°F 80°F1018.2 hPa
51213 40 mi38 min 80°F4 ft
51202 - Mokapu Point, HI (098) 82 mi38 min 79°F4 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI8 mi40 minNE 1210.00 miPartly Cloudy76°F66°F72%1018.3 hPa

Link to 5 minute data for PHOG

Wind History from HOG (wind in knots)
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Last 24hrNE9NE8NE10NE6CalmCalmNE6N5CalmCalmN5N9NE12NE19NE19NE19NE18NE18N17NE16N17NE17NE11NE12
1 day agoNE14NE13NE10NE9NE5NE6NE5NE3N5N5NE5CalmNE16NE17NE20NE21NE22NE20NE18NE17NE15NE14NE13NE8
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Tide / Current Tables for Kahului, Kahului Harbor, Hawaii (2)
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Kahului
Click for Map
Mon -- 02:56 AM HST     Moonset
Mon -- 05:02 AM HST     -0.14 feet Low Tide
Mon -- 05:45 AM HST     Sunrise
Mon -- 12:19 PM HST     2.55 feet High Tide
Mon -- 04:17 PM HST     Moonrise
Mon -- 07:09 PM HST     Sunset
Mon -- 07:31 PM HST     0.52 feet Low Tide
Mon -- 11:33 PM HST     1.14 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.20.90.60.2-0-0.1-00.30.81.41.92.32.52.52.21.91.410.70.50.50.70.91.1

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii (2) (expired 1999-12-31)
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Kahului
Click for Map
Mon -- 02:56 AM HST     Moonset
Mon -- 05:41 AM HST     -0.41 feet Low Tide
Mon -- 05:45 AM HST     Sunrise
Mon -- 01:12 PM HST     2.43 feet High Tide
Mon -- 04:17 PM HST     Moonrise
Mon -- 07:09 PM HST     Sunset
Mon -- 07:29 PM HST     0.97 feet Low Tide
Mon -- 11:31 PM HST     1.40 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.10.70.3-0.1-0.4-0.4-0.20.20.81.41.92.32.42.42.11.81.41.1111.11.31.4

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GEOS Local Image of Hawaii    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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