Sunday, April18, 2021
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Marine Weather and Tides
Kahaluu, 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 6:07AMSunset 6:52PM Sunday April 18, 2021 9:47 AM HST (19:47 UTC) Moonrise 10:57AMMoonset 12:00AM Illumination 43% Phase: First Quarter Moon; Moon at 7 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- 905 Am Hst Sun Apr 18 2021
Rest of today..Northeast winds 15 knots. Wind waves 3 feet. North swell 4 feet. Isolated showers through the day.
Tonight..East winds 15 knots. Wind waves 3 feet. North swell 4 feet. Isolated showers.
Monday..Northeast winds 10 knots. Wind waves 3 feet. North swell 3 feet. Isolated showers.
Monday night..North winds 10 knots. Wind waves 3 feet. North swell 3 feet. Isolated showers.
Tuesday..Winds variable less than 10 knots. Wind waves 3 feet. Isolated showers.
Tuesday night..Northeast winds 10 knots. Wind waves 3 feet. Isolated showers through the night.
Wednesday..East winds 10 knots. Wind waves 4 feet. Isolated showers.
Thursday..East winds 15 knots. Wind waves 4 to 5 feet. Isolated showers.
PHZ100 905 Am Hst Sun Apr 18 2021
Synopsis for hawaiian coastal waters.. Ridge north of the area will weaken late tonight through the first half of the week as a front passes to the north.


7 Day Forecast for Marine Location Near Kahaluu, HI
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location: 21.46, -157.8     debug


Area Discussion for -
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FXHW60 PHFO 181930 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 930 AM HST Sun Apr 18 2021

SYNOPSIS. Mostly dry weather will continue as trades weaken tonight and a land and sea breeze pattern develops Monday through Wednesday. Moderate to breezy trades will return on Thursday and continue through the weekend.

DISCUSSION.

The remnant band of stratocu that has been over the state for the last couple days is bringing mostly cloudy skies and a few windward showers to Molokai and Maui as it slowly dissipates. Otherwise, fair weather will continue through today thanks to modest easterly trades and dry low levels characterized by dewpoints hovering around 60 degrees.

The gradient is still forecast to diminish tonight into the midweek period as low pressure develops over the north-central Pacific. As winds weaken and veer to ESE overnight, onshore wind will bring showers to southeast sections of Big Island while also causing blocked flow and a further reduction to wind speeds over the smaller islands. As a result, land/sea breezes and some degree of cloudiness over inland areas can be expected each afternoon. Mid- level moisture approaching from the south will spread over the southern end of the state early Monday morning and the remainder of the forecast area Monday night into Tuesday. Forecast soundings indicate the subsequent weakening of the inversion will be countered by warm temperatures and poor lapse rates aloft thereby inhibiting any deeper convection. As a result, any inland shower activity Tuesday will remain isolated to scattered and mainly light. Model consensus continues to improve for the late week period when a remnant cold front is expected to stall just north of the islands allowing for a return to a moderate to breezy trade wind pattern.

AVIATION. VFR conditions prevail at all TAF sites and these conditions are expected to prevail through the day and on through the evening hours. Some brief MVFR conditions can be expected over windward slopes of all islands though VFR conditions are expected to prevail.

No AIRMETs in effect and none are expected.

MARINE.

No changes expected this morning to the marine forecast. A high pressure ridge to the north of the islands will maintain northeast to east trade wind pattern over the waters today. The ridge is expected to sink southward tonight, which will turn the winds to the southeast with a weakening trend. Winds will be weakest over the northern islands, where land and sea breezes could set up over along the coasts. A return of moderate to fresh easterly trades will be possible late Wednesday through the second half of the week.

No significant swells are expected through the week. Surf along north facing shores will hold steady through Monday due to a persistent short- to- medium period mix of north- northwest to north- northeast energy moving through. As this energy eases into Tuesday, a medium- period, moderate northwest swell from a nearby source should arrive and begin to build down the island chain Tuesday night through Wednesday. This will be a long-lived event that should hold into next weekend.

Surf along south facing shores will remain up into Monday as the Tasman swell that arrived Saturday moves through. A gradual downward trend is anticipated Tuesday through midweek. A similar south-southwest swell will be possible late in the week.

HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . JVC AVIATION . Burke MARINE . M Ballard


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 2 mi71 min NE 5.1 G 8 75°F 77°F1020.2 hPa
51207 3 mi51 min 76°F5 ft
51210 3 mi51 min 76°F5 ft
OOUH1 - 1612340 - Honolulu, HI 11 mi47 min NE 5.1 G 12 75°F 76°F1020.2 hPa (+1.5)
51211 14 mi47 min 76°F2 ft
51212 21 mi51 min 77°F3 ft
51201 - Waimea Bay, HI (106) 22 mi50 min 76°F5 ft
51WH0 - WHOTS - Woods Hole Ocean Time-series 39 mi77 min 75°F1019.6 hPa

Wind History for Mokuoloe, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI2 mi1.8 hrsNE 810.00 miA Few Clouds75°F62°F64%1018.6 hPa
Daniel K Inouye International Airport, HI10 mi54 minNNE 10 G 1510.00 miMostly Cloudy79°F58°F49%1019.7 hPa
Wheeler Air Force Base / Oahu, HI12 mi51 minE 1010.00 miFair73°F60°F63%1020 hPa
Oahu, Kalaeloa Airport, HI17 mi54 minNNE 910.00 miFair77°F62°F60%1020.7 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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Last 24hrNE11NE12NE13NE10NE10NE11NE10NE8NE10NE10NE9NE8E6E4E6NE8E5E7NE9NE10NE12NE9NE8NE7
1 day agoN5N5NE9NE9NE8N7NE8N7N6N5N4N3CalmCalmW4W5W5NW6W3W6SW4CalmW4NW3
2 days agoNE9E7N10N9NE10NE13NE12NE8NE10NE10NE10NE10NE7NE5NE6NE5E3E6NE7CalmS3CalmCalmCalm

Tide / Current Tables for Waikane, Kaneohe Bay, Oahu Island, Hawaii
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Waikane
Click for Map
Sun -- 03:54 AM HST     0.47 feet Low Tide
Sun -- 06:09 AM HST     Sunrise
Sun -- 06:42 AM HST     0.63 feet High Tide
Sun -- 10:56 AM HST     Moonrise
Sun -- 11:32 AM HST     0.39 feet Low Tide
Sun -- 06:52 PM HST     Sunset
Sun -- 07:48 PM HST     1.90 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.70.60.50.50.50.60.60.60.50.50.40.40.50.60.91.11.41.71.91.91.81.71.4

Tide / Current Tables for Moku o Loe, Kaneohe Bay Oahu Island, Hawaii
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Moku o Loe
Click for Map
Sun -- 03:58 AM HST     0.47 feet Low Tide
Sun -- 06:09 AM HST     Sunrise
Sun -- 07:04 AM HST     0.43 feet High Tide
Sun -- 10:57 AM HST     Moonrise
Sun -- 11:36 AM HST     0.39 feet Low Tide
Sun -- 06:52 PM HST     Sunset
Sun -- 08:10 PM HST     1.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.70.60.50.50.50.40.40.40.40.40.40.40.50.60.811.21.51.61.71.71.51.3

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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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