Monday, September27, 2021
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Marine Weather and Tides
Kekaha, 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 6:21AMSunset 6:25PM Sunday September 26, 2021 9:25 PM HST (07:25 UTC) Moonrise 9:53PMMoonset 10:58AM Illumination 67% Phase: Waning Gibbous; Moon at 21 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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7 Day Forecast for Marine Location Near Kekaha, HI
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location: 23.78, -166.22     debug


Area Discussion for -
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FXHW60 PHFO 270629 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 829 PM HST Sun Sep 26 2021

SYNOPSIS.

Breezy trades will weaken to moderate from Wednesday onward and will remain on the drier side throughout this time. The best opportunities for rain will be over windward and mauka areas during the overnight and early morning hours.

DISCUSSION.

A compact upper-level shortwave evident on water vapor imagery is approaching the islands from the north this evening and is modeled to become increasingly closed off from the westerlies as it approaches the state during the next 24 hours or so. A noticeable reduction of trade winds into the moderate category is then expected from Wednesday onward as the upper low eases the local pressure gradient and spends the remainder of the forecast period advancing from east to west over the area. Although the inversion will remain slightly elevated or weaker than normal at times during this period, indications from upstream satellite and the latest model solutions are that limited moisture availability will still support relatively dry trades for at least the next several days. Some increase in cirrus coverage is probable by the end of the week as the strengthening southwesterly upper jet funnels convective debris from the ITCZ over area skies.

AVIATION.

The combination of surface high pressure N of the islands and a surface trough passing to the S will produce breezy to locally strong trade winds overnight. A slight decrease in wind speed is anticipated on Monday as the trough moves away from the area. AIRMET Tango for low level turbulence over and downwind of terrain on all islands will likely remain in effect through Monday.

A pocket of moisture on the northern flank of the trough will bring periods of MVFR VIS/CIG in SHRA over windward slopes of the Big Island for the time being, and AIRMET Sierra for mountain obscuration remains posted. Latest satellite images indicate some decrease in coverage is possible later tonight. Elsewhere, the trade winds will deliver a few showers that will bring ISOL MVFR conditions to windward slopes and coasts, while VFR conditions will prevail over leeward areas.

MARINE.

A fairly tight pressure gradient, generated by high pressure far north of the area in combination with a surface trough moving west to the south of the island chain, is helping to produce trade winds in the moderate to breezy range over coastal waters. This will persist into Tuesday. Wind speeds may slow a bit late Tuesday through Thursday as high pressure north of the islands weakens. The Small Craft Advisory (SCA) still covers most of the Hawaiian coastal waters, but will be reduced in area to the typically windier waters around Maui County and the Big Island Monday as the trough passes slowly west of the area, then below SCA thresholds everywhere Tuesday into Thursday.

The north-northwest swell will continue to slowly lower, with north shore surf dropping into Monday. A small north swell will build in Tuesday into Wednesday with a small bump in surf heights expected along north facing shores. The south swell will fade to background level surf heights through at least Wednesday. The trade wind swell will hold east shore surf heights roughly the same through tonight, before lowering slowly Monday and Tuesday. East shore surf will increase back to near average heights on Thursday or Friday as the trades increase once more.

HFO WATCHES/WARNINGS/ADVISORIES. Small Craft Advisory until 6 PM HST Monday for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.

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



DISCUSSION . JVC AVIATION . Birchard MARINE . Kinel


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Airport Reports
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Tide / Current Tables for East Island, French Frigate Shoals
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East Island
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Mon -- 12:47 AM HST     0.36 feet Low Tide
Mon -- 06:55 AM HST     Sunrise
Mon -- 09:01 AM HST     1.31 feet High Tide
Mon -- 12:51 PM HST     Moonset
Mon -- 06:00 PM HST     0.51 feet Low Tide
Mon -- 06:55 PM HST     Sunset
Mon -- 08:28 PM HST     0.53 feet High Tide
Mon -- 11:38 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.40.40.50.70.811.21.31.31.31.21.10.90.80.60.60.50.50.50.50.50.50.5

Tide / Current Tables for
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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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