Wednesday, March3, 2021
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Marine Weather and Tides
Kaneohe, HI

Version 3.4
NOTICE
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 6:48AMSunset 6:37PM Wednesday March 3, 2021 2:08 AM HST (12:08 UTC) Moonrise 11:30PMMoonset 10:11AM Illumination 77% Phase: Waning Gibbous; Moon at 19 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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PHZ116 Kaiwi Channel- 901 Pm Hst Tue Mar 2 2021
.small craft advisory in effect through Wednesday afternoon...
Rest of tonight..East winds to 25 knots. Wind waves 10 feet. North swell 3 feet. Scattered showers.
Wednesday..Northeast winds 20 knots. Wind waves 8 feet. North swell 3 feet. Isolated showers.
Wednesday night..Northeast winds 20 knots. Wind waves 6 feet. North swell 5 feet. Isolated showers.
Thursday..Northeast winds 20 knots. Wind waves 5 feet. North swell 7 feet. Isolated showers.
Thursday night..Northeast winds 20 knots. Wind waves 5 feet. North swell 7 feet. Scattered showers.
Friday..East winds 20 knots. Wind waves 7 feet. North swell 8 feet. Scattered showers.
Friday night..Northeast winds to 25 knots. Wind waves 8 feet. North swell 8 feet. Scattered showers.
Saturday..Northeast winds 20 knots. Wind waves 6 to 7 feet. North swell 6 to 8 feet. Isolated showers.
Sunday..East winds 20 knots. Wind waves 7 feet. North swell 5 to 6 feet. Isolated showers.
PHZ100 901 Pm Hst Tue Mar 2 2021
Synopsis for hawaiian coastal waters.. Strong high pressure far north of the state will produce strong to gale force trade winds and large rough seas. Trade winds will weaken slightly late tonight and tomorrow, then restrengthen Thursday afternoon into the weekend.


7 Day Forecast for Marine Location Near Kaneohe, HI
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location: 21.42, -157.78     debug


Area Discussion for -
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FXHW60 PHFO 030642 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 842 PM HST Tue Mar 2 2021

SYNOPSIS. Breezy to windy trades will persist tonight, then slowly decrease during the next few days. Fairly typical trade wind weather will persist through Thursday, with showers favoring windward and mauka areas, particularly at night and into the early morning hours. A surface trough will develop in the vicinity of the islands Thursday night, then slowly shift westward Friday and Friday night. This will bring wet trade wind conditions particularly to windward sections of the smaller islands. As the trough shifts westward, a more typical but slightly wetter than normal trade wind pattern will return over the weekend, with trades increasing back to breezy levels. The trades will strengthen further to windy levels early next week, with the wetter than normal trade wind conditions persisting.

DISCUSSION. Currently at the surface, a 1043 mb high is centered around 1700 miles northwest of Honolulu, and is driving breezy to windy easterly trades across the island chain this evening. Infrared satellite imagery shows mostly cloudy conditions in most windward areas, and partly cloudy skies in most leeward communities. Additionally, a roughly 50 mile wide band of enhanced cloud cover is seen around 40 miles to the east-northeast of the islands this evening. Radar imagery shows scattered to numerous showers moving into windward areas, with the trades blowing a few showers into leeward sections from time to time. Further upstream, some enhanced showers are seen in association with the cloud band mentioned above moving into the nearshore coastal waters. Main short term concerns revolve around trade wind trends during the next couple days.

High pressure northwest of the islands will gradually weaken as it settles southeastward during the next few days. Breezy to locally windy trades will continue tonight, ease to breezy levels Wednesday, then diminish to moderate speeds Thursday through Friday. Latest observations indicate than winds have dropped below advisory levels, and with the downward trend expected overnight, will go ahead and cancel Wind Advisory with the evening forecast package. A weak surface trough will develop in the vicinity of the islands on Friday, then shift westward Friday night as a new strong 1040+ mb high builds north of the state. This strong high will slowly settle southeastward through early next week, with breezy conditions expected over the weekend, and windy conditions developing for the first half of the new week.

As for the remaining weather details, fairly typical trade wind weather will prevail through Thursday, with showers favoring windward and mauka areas, particularly at night and through the early morning hours. A cloud band upstream of the islands will increase shower coverage as it passes through the islands later tonight. We should see things dry out nicely by mid morning Wednesday, with only a few showers expected through the remainder of the day, mainly in windward areas. Another band of clouds and showers which can be seen in satellite imagery further upstream to the northeast of the state this evening, appears on track to move through the islands Wednesday night bringing another increase in shower coverage. Expect conditions to dry out similarly on Thursday, although quite a bit of high cloud cover will be overspreading the islands as an upper level trough digs to the northwest of the state.

A weak surface trough will develop in the vicinity of the islands Thursday night along the tail end of an old front. This surface trough will then slide slowly westward Friday and Friday night. Moisture from the surface trough combined with added instability from the trough aloft will lead to an increase in shower coverage and intensity across the islands during this time, with the potential for some locally heavy rainfall over windward areas. At the moment, the deepest moisture appears to target the smaller islands, particularly Kauai and Oahu. Once the surface trough shifts west of the state, we should see a fairly typical but slightly wetter trade wind pattern develop for the weekend, which will continue into early next week.

AVIATION. A surface high to the northwest of the state will continue to support breezy to locally strong easterly trade winds throughout the night and into tomorrow, though speeds should gradually diminish throughout the period. Latest satellite imagery and model data depict a band of moisture approaching the islands from the east this evening. This will pass over the state tonight and favor showers with periods of MVFR level clouds for north through east sections of the islands through the early morning hours.

AIRMET Tango remains in effect for moderate to severe low-level turbulence near and downwind of the terrain given the locally strong surface winds. It also accounts for moderate mid-level turbulence between FL220 and FL300. Wind speeds are expected to not be quite as strong in the vicinity of Maui and the Big Island tomorrow, so it is possible that the AIRMET Tango for surface winds greater than 30kts may be cancelled during the early morning hours.

MARINE. A Gale Warning remains in effect for the Alenuihaha channel and for waters lee and south of the Big Island through tonight. A Small Craft Advisory (SCA) remains posted for the remaining waters due to a combination of strong trade winds and elevated seas. The Gale Warning will be downgraded to an SCA and include all other waters early tomorrow morning through tomorrow afternoon. The SCA may be scaled back briefly to typically windy waters around Big Island and Maui County tomorrow night. Building high pressure to the northwest of the state will boost trades first over waters west of Kauai, then across remaining waters Thursday into the weekend. This may warrant an expansion and continuation of the SCA.

Large trade wind-driven seas will maintain east shoreline surf above the 8 foot High Surf Advisory (HSA) threshold through tomorrow afternoon. As trade winds over and upstream of the islands weaken late tonight into tomorrow, surf along eastern exposures will lower to borderline HSA levels by tomorrow evening, becoming small by Thursday. Increasing trade wind swell and an arriving northerly swell at the end of this week and into the weekend will provide a bump in east shoreline surf.

A northwest swell will begin arriving tomorrow afternoon and evening, peaking surf along north and west-facing shores late Thursday into Friday. The secondary north swell will arrive Friday and, in addition to the returning trade wind swell wrap, will keep surf at, or slightly above, HSA heights through the end of this week and into the weekend.

Surf along south-facing shores continues to pull in some trade wind swell wrap with an expected decline tomorrow with the easing trades. A southwest swell will fill in late tomorrow through Thursday before slowly declining through the weekend, which will keep south shore surf from going flat.

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Advisory until 6 PM HST Wednesday for Kauai Windward- Oahu Koolau-Olomana-Molokai Windward-Maui Windward West-Windward Haleakala-South Big Island-Big Island North and East.

Small Craft Advisory from 6 AM to 6 PM HST Wednesday for Maalaea Bay-Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters- Big Island Southeast Waters.

Gale Warning until 6 AM HST Wednesday for Maalaea Bay-Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.

Small Craft Advisory until 6 PM HST Wednesday for Kauai Northwest Waters-Kauai Windward Waters-Kauai Leeward Waters- Kauai Channel-Oahu Windward Waters-Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters-Maui County Leeward Waters- Big Island Windward Waters.



DISCUSSION . Jelsema AVIATION . Vaughan/JVC MARINE . Powell


Weather Reporting Stations
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Wind History for Mokuoloe, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI2 mi2.2 hrsENE 1210.00 miMostly Cloudy71°F62°F73%1020.4 hPa
Daniel K Inouye International Airport, HI9 mi75 minENE 1110.00 miLight Rain70°F61°F73%1020.7 hPa
Wheeler Air Force Base / Oahu, HI14 mi72 minSW 510.00 miLight Drizzle64°F61°F92%1021 hPa
Oahu, Kalaeloa Airport, HI17 mi75 minNE 610.00 miA Few Clouds70°F61°F73%1021.7 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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Tide / Current Tables for Waikane, Kaneohe Bay, Oahu Island, Hawaii
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Waikane
Click for Map
Wed -- 12:05 AM HST     0.60 feet Low Tide
Wed -- 05:01 AM HST     1.47 feet High Tide
Wed -- 06:50 AM HST     Sunrise
Wed -- 10:11 AM HST     Moonset
Wed -- 11:53 AM HST     0.12 feet Low Tide
Wed -- 06:36 PM HST     Sunset
Wed -- 06:37 PM HST     1.93 feet High Tide
Wed -- 11:30 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.70.91.21.41.51.41.210.60.40.20.10.20.50.91.31.71.91.91.81.61.31.1

Tide / Current Tables for Waimanalo, Oahu Island, Hawaii
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Waimanalo
Click for Map
Wed -- 12:13 AM HST     0.34 feet Low Tide
Wed -- 05:32 AM HST     0.99 feet High Tide
Wed -- 06:49 AM HST     Sunrise
Wed -- 10:11 AM HST     Moonset
Wed -- 12:02 PM HST     -0.07 feet Low Tide
Wed -- 06:36 PM HST     Sunset
Wed -- 07:08 PM HST     1.39 feet High Tide
Wed -- 11:29 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.40.50.70.9110.90.70.40.2-0-0.1-00.20.50.81.11.31.41.31.210.8

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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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