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Marine Weather and Tides
Kaneohe Station, 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 6:50AMSunset 6:36PM Sunday February 28, 2021 11:55 PM HST (09:55 UTC) Moonrise 8:24PMMoonset 8:08AM Illumination 93% Phase: Waning Gibbous; Moon at 17 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- 930 Pm Hst Sun Feb 28 2021
.small craft advisory in effect through Tuesday afternoon...
Rest of tonight..East winds to 30 knots. Wind waves 12 feet. Northwest swell 4 feet. Isolated showers early in the evening, then scattered showers after midnight.
Monday..Northeast winds to 30 knots. Wind waves 13 feet. Northwest swell 3 feet. Isolated showers through the day.
Monday night..East winds to 30 knots. Wind waves 12 feet. Isolated showers.
Tuesday..East winds to 30 knots. Wind waves 12 feet. Isolated showers.
Tuesday night..Northeast winds to 25 knots. Wind waves 11 feet. Isolated showers.
Wednesday..Northeast winds 20 knots. Wind waves 8 feet. Northwest swell 3 feet. Isolated showers.
Wednesday night..Northeast winds 15 knots. Wind waves 6 feet. Northwest swell 5 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 5 feet. Northwest swell 5 to 7 feet. Scattered showers.
Friday..Northeast winds 20 knots. Wind waves 7 to 9 feet. North swell 6 to 7 feet. Scattered showers.
PHZ100 930 Pm Hst Sun Feb 28 2021
Synopsis for hawaiian coastal waters.. Strong high pressure passing far north of the state will produce strong to gale force trade winds and rough seas through Tuesday.


7 Day Forecast for Marine Location Near Kaneohe Station, HI
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location: 21.47, -157.77     debug


Area Discussion for -
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FXHW60 PHFO 010658 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 858 PM HST Sun Feb 28 2021

SYNOPSIS. Windy trade winds will persist through Monday night before they begin trending down. This comes about as the strong surface high far north of Kauai starts weakening on Monday. Calmer trade winds are instore for the islands during the second half of the week. A more stable air mass is forecast to spread over the islands later tonight and Monday as the upper level trough weakens and drift south of the Big Island late. A boost in trade wind showers will come during the second half of the week with a series of old fronts affecting the islands.

DISCUSSION. Brief, but frequent heavy showers still pose a threat for local flooding along the Hamakua coast including the Hilo and Puna districts of the Big Island, and the windward side of Maui this evening. A Flash Flood Watch (FFA) remains in effect for most of the Big Island and windward Maui to 6 am HST Monday morning, or the rest of tonight. The threat of flooding is expected to start lessening after midnight tonight as a more stable air mass slowly spread across the island chain from the north. The upper trough, which has been stationary over the eastern part of the island chain for the past couple of days, is forecast to weaken and shift just south of the Big Island by Monday evening. Hence, the FFA could be lowered when the 4 am HST forecast package goes out.

The weather system responsible for the windy trades, a strong 1043 mb surface high, is located 1300 miles north of Kauai this evening. Wind Advisory is effect for all islands but Oahu and Kauai. We will be assessing the need to expand this advisory to the remaining islands for Monday. We expected the peak of the wind to occur Monday afternoon due to subsidence from the stable air, leading to acceleration over the mountain ridge and leeward slopes. The advisory could be extended into Tuesday despite the weakening high. But trades are expected to tone down to moderate to locally strong by Wednesday night.

During the second half of the week, models are in agreement for a couple of bands of clouds/showers to push through the islands, leading to a boost in trade showers.

Also, a new surface high, though, located far northwest of the islands late in the week, may shift the stronger trades to the west end of the island chain toward Friday and the upcoming weekend.

AVIATION. Strong high pressure to the distant N will support very strong trade winds while a trough aloft keeps the island atmosphere unstable, most notably near Maui and the Big Island. This will ensure a steady stream of fast-moving briefly heavy downpours moving through windward areas. These windward showers will produce periods of MVFR VIS/CIG in +SHRA, then gradually diminish as they spread leeward on the smaller islands. Shower coverage and intensity over windward Big Island is sufficiently widespread to warrant AIRMET SIERRA for TEMPO IFR, while SIERRA is also posted for mountain obscuration on Maui. Coverage over the other islands may require an expansion of SIERRA. AIRMET TANGO for moderate lee turbulence will remain posted, and may need to include mention of ISOL severe turbulence. TANGO has also been updated to include mention of localized strong surface winds of 30 kt.


MARINE. Strong high pressure located far north of the state will produce areawide strong to local gale force trade winds across the near- shore waters. Persistent, strong trades over the past several days have generated fully- developed rough sea conditions around the Hawaiian Islands and this rough sea state will hold through Tuesday. Trades achieving or frequently gusting to gale through the windier channels and bays surrounding Maui County and the Big Island has a Gale Warning (GLW) posted for the Pailolo and Alenuihaha Channels, Maalaea Bay and waters south of the Big Island. A Small Craft Advisory (SCA) remains in effect for the remaining coastal waters due to the combination of strong trades and high seas. These conditions will likely persist into Tuesday as high pressure dominates north of the islands. The high will be weakened by a North Pacific cold front late Tuesday and Wednesday. This will result in a short term decline in both trades and lowering seas with a cancellation of the long standing SCA over most waters by Wednesday evening. As high pressure moves in from the west and travels north of the islands late in the week, trades will restrengthen to moderate to locally strong magnitudes late Thursday into the weekend over the western waters.

Large trade wind-driven seas will maintain high surf along east facing shores the next couple of days. Although the east swell is subtly lowering, these swells in tandem with easterly wind waves will continue to justify the ongoing High Surf Advisory (HSA) for the east-facing shores of Kauai, Oahu, Molokai, Maui and the Big Island. Trades will maintain strong to near gale force magnitudes through Tuesday. Thus, the HSA will remain up to account for 8 to 12 foot surf heights along most eastern exposures through Tuesday evening or early Wednesday morning.

Surf will remain below HSA criteria on all other shores through much of the week. Small, moderate period northwest swells have peaked today and will decline Monday and Tuesday. A larger northwest swell arriving late Wednesday will lift north and west-facing shoreline surf to near advisory levels Thursday and Friday. These swells will shift more north and decline through next weekend. Surf along south-facing shores will remain at or slightly above winter averages through the week due to a combination of both small south-southwest swells and trade wind wave and swell wrap.

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

Flash Flood Watch until 6 AM HST Monday for Maui Windward West- Windward Haleakala-Haleakala Summit-South Big Island-Big Island North and East-Big Island Interior.

Wind Advisory until 6 PM HST Monday for Molokai-Lanai-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley- Windward Haleakala-Leeward Haleakala-South Big Island-Big Island North and East-Kohala.

Winter Weather Advisory until 6 AM HST Monday for Big Island Summits.

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

Small Craft Advisory until 6 PM HST Tuesday 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.



H Lau/Birchard/Blood


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51207 1 mi30 min 76°F10 ft
51210 1 mi60 min 76°F10 ft
MOKH1 - 1612480 - Mokuoloe, HI 3 mi80 min E 13 G 18 74°F 75°F1023.4 hPa
51202 - Mokapu Point, HI (098) 6 mi30 min 76°F12 ft
OOUH1 - 1612340 - Honolulu, HI 13 mi56 min SE 4.1 G 8.9 73°F 76°F1022.4 hPa (+0.7)
51211 16 mi56 min 76°F4 ft
51212 23 mi60 min 77°F3 ft
51WH0 - WHOTS - Woods Hole Ocean Time-series 39 mi86 min 75°F1023.4 hPa

Wind History for Mokuoloe, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI1 mi2 hrsE 18 G 2510.00 miPartly Cloudy and Breezy74°F64°F71%1021.7 hPa
Daniel K Inouye International Airport, HI12 mi63 minENE 17 G 2410.00 miA Few Clouds73°F62°F69%1022.1 hPa
Wheeler Air Force Base / Oahu, HI14 mi3 hrsE 12 G 175.00 miHeavy Rain Fog/Mist67°F64°F90%1022.4 hPa
Oahu, Kalaeloa Airport, HI19 mi63 minENE 9 G 2010.00 miFair73°F62°F69%1022.8 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
Mon -- 03:46 AM HST     2.05 feet High Tide
Mon -- 06:51 AM HST     Sunrise
Mon -- 08:48 AM HST     Moonset
Mon -- 10:46 AM HST     0.08 feet Low Tide
Mon -- 04:32 PM HST     1.73 feet High Tide
Mon -- 06:35 PM HST     Sunset
Mon -- 09:25 PM HST     Moonrise
Mon -- 10:52 PM HST     0.42 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.71.21.7221.91.61.20.70.40.10.10.30.61.11.51.71.71.61.310.70.50.4

Tide / Current Tables for Waimanalo, Oahu Island, Hawaii
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Waimanalo
Click for Map
Mon -- 04:17 AM HST     1.49 feet High Tide
Mon -- 06:50 AM HST     Sunrise
Mon -- 08:47 AM HST     Moonset
Mon -- 10:55 AM HST     -0.10 feet Low Tide
Mon -- 05:03 PM HST     1.22 feet High Tide
Mon -- 06:35 PM HST     Sunset
Mon -- 09:25 PM HST     Moonrise
Mon -- 11:01 PM HST     0.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.71.11.31.51.41.20.90.50.2-0-0.100.30.60.91.11.21.210.70.40.30.2

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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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