Wednesday, May27, 2020
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Marine Weather and Tides
Kualapuu, 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 7:02PM Wednesday May 27, 2020 1:09 AM HST (11:09 UTC) Moonrise 10:13AMMoonset 11:50PM Illumination 28% Phase: Waxing Crescent; Moon at 5 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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PHZ120 Pailolo Channel- 931 Pm Hst Tue May 26 2020
Rest of tonight..East winds 15 knots. Wind waves 4 feet. Isolated showers late in the evening. Scattered showers after midnight.
Wednesday..East winds 20 knots. Wind waves 3 feet. Scattered showers in the morning. Isolated showers in the afternoon.
Wednesday night..East winds 20 knots. Wind waves 4 feet. Northwest swell 3 feet. Isolated showers.
Thursday..East winds 20 knots. Wind waves 4 feet. Northwest swell 3 feet. Isolated showers.
Thursday night..East winds 20 knots. Wind waves 4 feet. Northwest swell 3 feet. Isolated showers.
Friday..East winds 20 knots. Wind waves 4 feet. Northwest swell 3 feet. Isolated showers.
Friday night..East winds 20 knots. Wind waves 4 feet. Northwest swell 3 feet. Isolated showers in the evening. Scattered showers after midnight.
Saturday..East winds 10 knots. Wind waves 3 feet. North swell 3 feet. Isolated showers.
Sunday..East winds 15 knots. Wind waves 4 feet. Northwest swell 3 feet. Isolated showers.
PHZ100 931 Pm Hst Tue May 26 2020
Synopsis for hawaiian coastal waters.. High pressure will remain north of the islands into the upcoming weekend.


7 Day Forecast for Marine Location Near Kualapuu, HI
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location: 21.29, -157     debug


Area Discussion for -
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FXHW60 PHFO 270629 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 829 PM HST Tue May 26 2020

SYNOPSIS. Trade winds will strengthen to moderate to locally breezy levels Wednesday and Thursday then hold into next week. Trades will focus rainfall over windward areas, with afternoon clouds and showers forming over leeward Big Island each afternoon. High clouds will linger over the islands through Thursday and thin on Friday.

DISCUSSION. Easterly trade winds remain rather weak, while a cutoff upper low to the southwest continues to send high clouds overhead. The subtropical ridge driving the east to east-southeasterly trade winds remains weak and depressed farther south than normal by a passing north Pacific front. Low level moisture in the trade wind flow is currently focused over windward slopes of the Big Island and Maui. Showers from afternoon convection will linger across leeward Big Island slopes for the next few hours but have dissipated on Oahu and Kauai now that sea breezes have ceased. Mid level ridging will maintain stable conditions and likely produce modest shower activity over windward slopes of mainly the Big Island and Maui overnight.

Trades will build on Wednesday and Thursday while high clouds continue to stream overhead. Trades will slowly strengthen as the front several hundred miles north of the state dissipates and high pressure farther north helps tighten the local pressure gradient. Even though trades will be increasing, they will likely be weak enough for afternoon sea breezes to take over across some sheltered leeward areas. The diffuse pocket of low level moisture moving over the eastern end of the island chain tonight may fuel an increase in windward showers on Oahu and help trigger a few showers across sheltered leeward terrain from Oahu to the Big Island. Drier trade wind weather is due by Thursday.

Typical trade wind weather is in store Friday through the weekend. Surface high pressure will settle several hundred miles north of the state, driving locally breezy trades. A mid level ridge will produce stable conditions with typical shower activity largely confined to windward slopes. The cutoff upper level low will move westward away from the islands, allowing high clouds to thin on Friday.

AVIATION. Stagnant high pressure to the northeast of the state will generate light to occasionally moderate trades tonight. Thus, scattered shower activity will be mainly limited to the windward sides of the islands. Periods of MVFR conditions, due to lowered ceiling heights and visibility, may periodically affect these aforementioned areas.

No AIRMETs are currently in effect.

MARINE. A ridge of high pressure about 240 nm north of Kauai will gradually lift north over the next few days, then persist just outside of the offshore waters through the weekend. This will cause the return of easterly trade winds with wind speeds becoming fresh to locally strong by Wednesday night. Currently we have no marine warnings posted, but Small Craft Advisory conditions are expected to return to the typical windy areas around Maui and the Big Island by Wednesday night.

Surf along north facing shores should see a small reinforcing north-northwest swell fill in through the day Wednesday with a peak expected Wednesday night. As this swell declines Thursday and Friday, a new north swell should fill in late Friday into Saturday.

Surf along south facing shores will remain near the summer average through the weekend as a series of small south-southwest and south-southeast swells moves through. An upward trend is expected next week with a moderate south swell possible by the middle of next week. This swell is due to a strong storm-force low currently southeast of New Zealand.

Surf along east facing shores will remain below the May average through the weekend due to the lack of strong trades upstream of the state.

For more details on surf see the latest Collaborative Nearshore Swell and Wind Forecast for Oahu (SRDHFO).

HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . Wroe AVIATION . Thomas MARINE . H Lau


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51205 36 mi40 min 78°F4 ft
51202 - Mokapu Point, HI (098) 37 mi40 min 78°F4 ft
51213 37 mi40 min 79°F2 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 39 mi52 min NNE 4.1 G 6 76°F 80°F1019.4 hPa
51207 42 mi40 min 78°F3 ft
51210 42 mi40 min 78°F4 ft
MOKH1 - 1612480 - Mokuoloe, HI 43 mi94 min E 7 G 8.9 77°F 82°F1019.8 hPa
OOUH1 - 1612340 - Honolulu, HI 46 mi58 min ENE 2.9 G 5.1 76°F 79°F1019.5 hPa

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaunakakai, Molokai Airport, HI11 mi16 minNE 810.00 miOvercast74°F64°F74%1019.3 hPa

Link to 5 minute data for PHMK

Wind History from HMK (wind in knots)
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Last 24hrCalmNE3CalmCalmN4N34S6NE7N10
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SE4SE3SE8SW7Calm4NE7NE5NE8NE6NE6NE5E7NE8
1 day agoE3CalmCalmCalmE3CalmCalm4S9SE10SW8SW7SE12
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S11SE7S9SE7SE4CalmNW5N6N5CalmN3
2 days agoNW4NW4NW3NE5NE6NE3NE66S6NE10
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NE9NE5N4N3CalmN4N3

Tide / Current Tables for Kaunakakai, Molokai (Hawaii)
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Kaunakakai
Click for Map
Wed -- 03:03 AM HST     0.14 feet Low Tide
Wed -- 05:46 AM HST     Sunrise
Wed -- 07:52 AM HST     0.53 feet High Tide
Wed -- 10:14 AM HST     Moonrise
Wed -- 12:19 PM HST     0.20 feet Low Tide
Wed -- 07:04 PM HST     Sunset
Wed -- 08:07 PM HST     2.07 feet High Tide
Wed -- 11:49 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.40.20.10.20.30.40.50.50.50.40.30.20.20.40.611.41.722.121.81.4

Tide / Current Tables for Kaunakakai, Molokai (Hawaii) (2)
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Kaunakakai
Click for Map
Wed -- 03:13 AM HST     0.04 feet Low Tide
Wed -- 05:46 AM HST     Sunrise
Wed -- 07:53 AM HST     0.46 feet High Tide
Wed -- 10:14 AM HST     Moonrise
Wed -- 12:03 PM HST     0.11 feet Low Tide
Wed -- 07:04 PM HST     Sunset
Wed -- 08:07 PM HST     2.01 feet High Tide
Wed -- 11:49 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.30.100.10.20.30.40.50.40.30.20.10.20.30.60.91.31.71.921.91.71.4

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 (7,2,3,4)
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Ground Weather Radar Station Molokai, HI
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weather_mapweather_map weather_map

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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.