Monday, June1, 2020
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Marine Weather and Tides
Lahaina, HI

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:43AMSunset 7:05PM Monday June 1, 2020 3:45 PM HST (01:45 UTC) Moonrise 3:14PMMoonset 2:40AM Illumination 83% 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- 316 Pm Hst Mon Jun 1 2020
Tonight..North winds 20 knots. Wind waves 2 feet or less. Isolated showers.
Tuesday..North winds 20 knots. Wind waves 2 feet or less. Isolated showers.
Tuesday night..North winds 20 knots. Wind waves 2 feet or less.
Wednesday..North winds 20 knots. Wind waves 2 feet or less.
Wednesday night..North winds to 25 knots. Wind waves 2 feet or less.
Thursday..North winds to 25 knots. Wind waves 2 feet or less then 3 feet in the afternoon.
Thursday night..North winds to 25 knots. Wind waves 3 feet.
Friday..North winds 20 knots. Wind waves 3 feet.
Saturday..North winds to 25 knots. Wind waves 3 to 5 feet.
PHZ100 316 Pm Hst Mon Jun 1 2020
Synopsis for hawaiian coastal waters.. High pressure far north of the islands will move off to the northeast through Tuesday. High pressure will strengthen late Tuesday, leading to fresh to locally strong trades Wednesday into the weekend.


7 Day Forecast for Marine Location Near Lahaina, HI
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location: 20.88, -156.68     debug


Area Discussion for -
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FXHW60 PHFO 011943 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 943 AM HST Mon Jun 1 2020

SYNOPSIS. Moderate trades will decrease tonight and showers will begin to increase as moisture from an old front rides in with the weakening trades. Breezy trade wind weather will return during the second half of the week, with scattered showers focused over windward and mauka areas and generally dry weather expected over most leeward locations.

DISCUSSION. Latest radar and satellite imagery is showing a few isolated showers this morning over select windward and mauka areas. Upstream of the state, we have scattered cumulus clouds, which are associated with an old frontal boundary. These clouds and showers will be moving in this evening across the state and will likely produce off and on light to moderate showers tonight through Tuesday night over windward and mauka areas. Leeward areas could also see a few passing showers.

Trade winds have decreased a bit from yesterday and will continue to decrease into Tuesday as the high north of the state shifts to our northeast. Winds may briefly become light enough for sea breezes mid day Tuesday for a few leeward areas. But the light winds will be short-lived as the high begins to shift back westward on Tuesday afternoon with moderate trades returning.

During the second half of the week, the high northeast of the state will continue to slowly drift westward and will bring a slight uptick in trade wind speeds. Breezy trade wind weather is expected through the weekend with light to moderate showers focused over windward and mauka areas.

AVIATION. Light to moderate trade wind flow will persist through twenty-four hours and beyond. Diurnal wind increases may generate gusts over 25 kt over summits and through channeled areas of the Big Island and Maui this afternoon and early evening. Isolated moderate turbulence possible lee of mountains.

Bands of showers embedded in the trade wind flow will continue to impact mainly north and east facing slopes and coasts. Mostly dry conditions expected during the day today with the next major band of showers not expected until early evening. Mountain obscuration could become an issue again late tonight or Tuesday morning for Windward Big Island.

Across Leeward Big Island, light sea breezes this afternoon and early evening will drive cumulus development over the Interior of the island. Weak land breezes will take over by late evening and promote partial clearing overnight.

Brief MVFR CIG and VIS are to be expected today in isolated moderate showers. Otherwise VFR conditions should prevail all areas through at least 021000Z.

MARINE. Trade winds have eased and will remain at moderate to locally fresh strength into Tuesday as surface high pressure far north of the state lifts away. Trade winds will gradually strengthen to fresh to locally strong levels late Tuesday and Wednesday as a surface ridge builds north of the islands. A Small Craft Advisory will likely be needed for typically windy waters around the Big Island and Maui during the second half of the work week.

An active spell of southern hemisphere swell is expected over the next several days. South shore surf will continue to run below June average through the day, with attention now shifting to the NOAA buoys south of the islands for the initial long period forerunners of next south-southwest swell. Though the bulk of this swell was aimed just east of the island chain, a significant rise in south shore surf is expected tomorrow, and advisory level surf is possible as the swell peaks Tuesday and Wednesday. The swell will decline Thursday and Friday and may be reinforced by a smaller south-southwest swell this weekend.

No significant sources of swell are noted from the north and east. The current, small north swell will be replaced by a small northwest swell from Tuesday to Thursday. With trade winds suppressed over and upwind of the islands, east shore surf is well below June average. Look for an increase to near to just below June normal Thursday through the weekend.


HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . Kino AVIATION . Bedal MARINE . Wroe


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 11 mi52 min NE 11 G 13 77°F 80°F1015.7 hPa
51205 17 mi46 min 79°F3 ft
51213 19 mi46 min 80°F3 ft
51202 - Mokapu Point, HI (098) 65 mi46 min 79°F3 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI10 mi61 minNE 1515.00 miA Few Clouds84°F68°F58%1015.6 hPa
Kahului, Kahului Airport, HI13 mi52 minNNE 1810.00 miPartly Cloudy and Breezy86°F70°F59%1015.7 hPa
Lanai City, Lanai Airport, HI16 mi50 minNNE 1310.00 miMostly Cloudy77°F73°F88%1015.1 hPa

Link to 5 minute data for PHJH

Wind History from HJH (wind in knots)
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------------------------NE9NE10N14N14NE11
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1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Lahaina, Maui Island, Hawaii
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Lahaina
Click for Map
Mon -- 02:40 AM HST     Moonset
Mon -- 05:45 AM HST     Sunrise
Mon -- 05:59 AM HST     -0.22 feet Low Tide
Mon -- 01:00 PM HST     1.79 feet High Tide
Mon -- 03:13 PM HST     Moonrise
Mon -- 06:59 PM HST     0.47 feet Low Tide
Mon -- 07:04 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.310.50.2-0.1-0.2-0.10.20.611.41.71.81.71.41.10.80.60.50.50.711.2

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Mon -- 02:39 AM HST     Moonset
Mon -- 05:30 AM HST     0.01 feet Low Tide
Mon -- 05:44 AM HST     Sunrise
Mon -- 12:12 PM HST     1.81 feet High Tide
Mon -- 03:12 PM HST     Moonrise
Mon -- 05:43 PM HST     0.81 feet Low Tide
Mon -- 07:03 PM HST     Sunset
Mon -- 11:15 PM HST     1.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.510.60.2000.20.611.41.71.81.81.61.310.90.80.91.21.51.71.8

Weather Map
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wmap_P
GEOS Local Image of Hawaii    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (21,6,7,8)
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Ground Weather Radar Station Molokai, HI
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.