Friday, September17, 2021
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Marine Weather and Tides
Hanamaulu, 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 6:18AMSunset 6:34PM Friday September 17, 2021 2:35 AM HST (12:35 UTC) Moonrise 4:59PMMoonset 3:19AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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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PHZ111 Kauai Windward Waters- 900 Pm Hst Thu Sep 16 2021
Rest of tonight..East winds 20 knots. Wind waves 6 feet. Isolated showers early in the evening, then scattered showers after midnight.
Friday..East winds 20 knots. Wind waves 6 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Friday night..East winds 20 knots. Wind waves 6 feet. Isolated showers in the evening, then scattered showers after midnight.
Saturday..East winds 20 knots. Wind waves 6 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Saturday night..East winds 15 knots. Wind waves 6 feet. Scattered showers.
Sunday..East winds 15 knots. Wind waves 5 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Sunday night..East winds 15 knots. Wind waves 5 feet. Scattered showers.
Monday..East winds 15 knots. Wind waves 4 feet. Scattered showers.
Tuesday..East winds 15 knots. Wind waves 4 feet. Northwest swell 3 feet. Scattered showers.
PHZ100 900 Pm Hst Thu Sep 16 2021
Synopsis for hawaiian coastal waters.. High pressure north of the state is producing a tight enough pressure gradient down across the islands to maintain fresh to locally strong trade winds the next several days.


7 Day Forecast for Marine Location Near Hanamaulu, HI
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location: 22, -159.33     debug


Area Discussion for -
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FXHW60 PHFO 170632 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 832 PM HST Thu Sep 16 2021

SYNOPSIS. Drier than normal trade wind weather and breezy conditions are expected through Friday, with a considerable amount of high cloud cover continuing to stream overhead. Breezy trades will continue Friday night and Saturday, while trade showers increase and high clouds diminish. Moderate to breezy trades will then prevail Sunday through late next week, along with fairly typical windward and mauka favored showers and the occasionally leeward spillover.

DISCUSSION. Currently at the surface, a 1028 mb high centered around 950 miles north of Honolulu, is driving moderate to breezy trade winds across the island chain this evening. Infrared satellite imagery shows considerable jet stream cirrus moving overhead, resulting in mostly cloudy conditions statewide. Radar imagery shows fairly dry conditions, with only a few light showers moving into windward areas. Main short term concerns revolve around trade wind trends and rain chances during the next several days.

High pressure to the distant north will shift eastward during the next couple days, keeping rather breezy trade winds in place across the island chain. The trades should ease into the moderate range Sunday and Monday as a front passes by far to the north of the state, and may increase to breezy levels once again Tuesday and Wednesday as a trough of low pressure slides by to the south of the islands. A new front approaching from the northwest may then ease the trades back to moderate levels late next week.

As for the remaining weather details, a drier than normal trade wind pattern should hold in place tonight and Friday, as mid and upper level ridging holds in place over the islands. Considerable high clouds will stream through the region however, resulting in a mostly cloudy night and partly sunny Friday. The ridging aloft will begin to breakdown upstream of the state Friday night, which should result in an increase in trade wind showers as we head toward daybreak Saturday, with the cirrus aloft expected to thin out as well. Fairly typical trade wind weather should then hold in place through the late next week. Showers will continue to favor windward and mauka areas, particularly at night and during the early morning hours, with a few showers reaching leeward areas from time due to the strength of the trades.

AVIATION. Breezy to locally strong trade winds will translate to low-level turbulence across the state downwind of the island terrain, which will persist into the weekend. An update to include AIRMET Tango reflecting this is anticipated this evening. MVFR CIGS/VSBYS are possible in and around passing showers focusing over windward and mauka areas. Otherwise, VFR conditions will prevail with limited showers expected over leeward areas.

MARINE. High pressure north of the state is producing a tight enough pressure gradient down across the islands to maintain fresh to locally strong trades the next several days. The eastern movement of the high the next few days will provide very little change to the Central Pacific pressure gradient and, thus, little variance to these fresh to locally strong trades. A Small Craft Advisory (SCA) will remain in effect for most waters around Maui County and Big Island through at least Friday. This SCA will likely require an extension into Saturday or Sunday. Trades may subtly weaken to more moderate, locally fresh magnitudes early next week.

The south swell continues to decline through tonight with a very small, long period reinforcement possible Friday. The next small, long period south swell energy originating from current Southern Hemispheric gales southeast of New Zealand are timed to arrive toward the middle of next week. A small, medium period northwest swell is expected to reach the islands late Saturday into Sunday to then be followed by a series of slightly larger, medium period northwest swells through next week emanating from a weekend North Pacific gale low. East facing shore surf experienced a steady increase throughout the day today with the return of fresh trades. East surf should hold at seasonable levels over the next several days per these strengthened trades over and upstream of the island chain.

HFO WATCHES/WARNINGS/ADVISORIES. Small Craft Advisory until 6 AM HST Saturday for Kaiwi Channel- Maui County Windward Waters-Maui County Leeward Waters-Maalaea Bay-Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters- Big Island Southeast Waters.



DISCUSSION . Jelsema AVIATION . Gibbs MARINE . Blood


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 3 mi47 min NE 11 G 13 78°F 1019.8 hPa
51208 24 mi39 min 80°F6 ft
51201 - Waimea Bay, HI (106) 68 mi38 min 79°F4 ft

Wind History for Nawiliwili, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI2 mi42 minENE 910.00 miPartly Cloudy78°F72°F82%1019.5 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI24 mi44 minENE 410.00 miFair75°F69°F82%1018.3 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)
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Last 24hr3E10E10E12E10E10E10E7E9E10E11E8E13E14E13E12E11------E14NE12NE11NE9
1 day agoNE15--NE14NE16NE14NE14NE13NE13NE13NE15NE15NE15NE14NE13NE13NE11NE10NE9NE9--NW7W8W7W5
2 days ago------NE15NE16
G21
NE15NE16NE15NE16NE16NE17NE16NE20NE16NE19----------NE17NE16--NE16

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Fri -- 01:34 AM HST     0.90 feet High Tide
Fri -- 03:18 AM HST     Moonset
Fri -- 06:24 AM HST     Sunrise
Fri -- 06:38 AM HST     0.30 feet Low Tide
Fri -- 01:49 PM HST     2.21 feet High Tide
Fri -- 04:58 PM HST     Moonrise
Fri -- 06:37 PM HST     Sunset
Fri -- 08:47 PM HST     0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.90.90.80.60.50.30.30.40.71.11.51.92.12.22.11.81.30.90.50.30.20.30.5

Tide / Current Tables for Port Allen, Hanapepe Bay, Kauai Island, Hawaii
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Port Allen
Click for Map
Fri -- 01:16 AM HST     0.85 feet High Tide
Fri -- 03:19 AM HST     Moonset
Fri -- 06:25 AM HST     Sunrise
Fri -- 06:37 AM HST     0.25 feet Low Tide
Fri -- 01:30 PM HST     1.97 feet High Tide
Fri -- 04:59 PM HST     Moonrise
Fri -- 06:38 PM HST     Sunset
Fri -- 08:46 PM HST     0.21 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.80.80.70.60.40.30.30.40.711.41.81.91.91.81.51.10.70.40.20.20.30.5

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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