Thursday, September23, 2021
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Marine Weather and Tides
Makena, HI

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 6:13AMSunset 6:22PM Thursday September 23, 2021 1:57 PM HST (23:57 UTC) Moonrise 8:24PMMoonset 8:37AM 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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PHZ119 Maalaea Bay- 945 Am Hst Thu Sep 23 2021
Rest of today..North winds 20 knots. Wind waves 2 feet or less.
Tonight..North winds 20 knots. Wind waves 2 feet or less.
Friday..North winds 20 knots. Wind waves 2 feet or less.
Friday night..North winds to 25 knots. Wind waves 3 feet.
Saturday..North winds to 25 knots. Wind waves 2 feet or less.
Saturday night..North winds to 25 knots. Wind waves 3 feet.
Sunday..North winds to 25 knots. Wind waves 3 feet.
Monday..North winds to 25 knots. Wind waves 3 feet.
PHZ100 945 Am Hst Thu Sep 23 2021
Synopsis for hawaiian coastal waters.. A ridge far north of the islands will strengthen slightly over the weekend.


7 Day Forecast for Marine Location Near Makena, HI
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location: 20.6, -156.6     debug


Area Discussion for -
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FXHW60 PHFO 231957 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 957 AM HST Thu Sep 23 2021

SYNOPSIS. A trade wind pattern will bring passing clouds and showers to mainly windward and mountain areas through the weekend and into next week. Increased showers are possible for windward Big Island late Saturday and Sunday.

DISCUSSION. A 1025 mb high positioned far northeast of the state is providing for a trade wind pattern across the forecast area. A dry and stable layer above the moist layer is keeping clouds and showers confined below 8 or 9 thousand feet, and overnight rainfall amounts are generally below 0.25 inch in even the typically wettest windward and mountain areas. A few thin high clouds are streaming northward across the state as an upper trough is currently west of the state bringing southerly flow aloft.

Expecting a trade wind weather pattern across the area for the next seven days. Ridging aloft will bring stable weather with passing clouds and showers the general rule. We are monitoring a trough far to the southeast of the state along the intertropical convergence zone near 143 west longitude, which is expected to swing northwestward over the next few days. This trough will likely bring the northern edge of the associated deeper tropical moisture plume near the Big Island as early as late Saturday and into early Sunday, bumping up the chances of rain along windward and upslope areas of the Big Island. Statewide, we would expect to have a slight boost in the trade wind strength this weekend as the trough passes by to our south.

AVIATION. With nearly stationary high pressure remaining far north of the area, trade winds will persist in the moderate to locally breezy range for the next several days. VFR will prevail over most areas, but lower cloudiness and showers moving along with the trades will bring brief MVFR conditions to mainly windward and mauka sections from time to time.

MARINE. Moderate to locally strong trade winds will remain in place for the foreseeable future, supported by a surface ridge to the N. A front passing far N of the islands has weakened the ridge, and surface pressures over the islands are down 1.5 mb over the past 24 hours. A new high building far NW of the area will strengthen the ridge over the next day or two, while a tropical disturbance is expected to pass S of the area over the weekend. This should bring a least a subtle boost in trade wind speeds, to the point that a Small Craft Advisory (SCA) will likely be required for waters around Maui and the Big Island, where terrain accelerates the flow.

Long-period forerunners of a new NNW swell are beginning to arrive at buoy 51101 NW of Kauai, while shorter-period remnants of a declining NW swell are delivering some small surf to N and W facing shores. Peak surf heights with the new swell are expected Friday, remaining below advisory levels along exposed N and W facing shores. This swell will slowly diminish Saturday, and more significantly Sunday. A small N swell is possible around the middle of next week. Surf along S facing shores will remain somewhat elevated the next couple of days before trending down next week. Short-period wind waves will support mostly small surf along E facing shores.

HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . Brenchley AVIATION . TS MARINE . Birchard


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 22 mi58 min NE 14 G 23 78°F 79°F1014.9 hPa (-1.6)

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lanai City, Lanai Airport, HI22 mi62 minNNE 15 G 2110.00 miOvercast78°F70°F76%1014.4 hPa
Kahului, Kahului Airport, HI23 mi64 minNE 20 G 2810.00 miPartly Cloudy and Breezy86°F69°F57%1014.9 hPa

Link to 5 minute data for PHNY

Wind History from HNY (wind in knots)
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NE14NE11NE10NE7NE11NE8E4NE8N6E3CalmNE5NE4NE4NW3N8SE10
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G21
1 day agoN5NE14NE13NE15
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NE12NE14NE13
G17
NE15E7NE7N11E6NE8NE10E7NE7NE10NE8SW5W8W10W9
G14
2 days agoS5NW6SE7NE17E8NE10NE4NE3NE8N9NE7NE4NE5E4E5NE6E10NE11SW3N9NE5S5CalmS4

Tide / Current Tables for Kuheia Bay, Kahoolawe Island, Hawaii
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Kuheia Bay
Click for Map
Thu -- 05:21 AM HST     1.98 feet High Tide
Thu -- 06:15 AM HST     Sunrise
Thu -- 08:37 AM HST     Moonset
Thu -- 11:35 AM HST     0.55 feet Low Tide
Thu -- 05:08 PM HST     1.60 feet High Tide
Thu -- 06:21 PM HST     Sunset
Thu -- 08:23 PM HST     Moonrise
Thu -- 11:13 PM HST     0.31 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.71.11.51.821.91.71.41.10.80.60.60.711.31.51.61.51.310.70.40.3

Tide / Current Tables for Smuggler Cove, Kahoolawe Island, Hawaii
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Smuggler Cove
Click for Map
Thu -- 05:16 AM HST     1.98 feet High Tide
Thu -- 06:15 AM HST     Sunrise
Thu -- 08:37 AM HST     Moonset
Thu -- 11:47 AM HST     0.55 feet Low Tide
Thu -- 05:02 PM HST     1.60 feet High Tide
Thu -- 06:21 PM HST     Sunset
Thu -- 08:23 PM HST     Moonrise
Thu -- 11:25 PM HST     0.31 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.61.11.51.821.91.71.41.10.80.60.60.70.91.31.51.61.51.310.70.50.3

Weather Map
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GEOS Local Image of Hawaii    EDIT
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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