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Marine Weather and Tides Kekaha, HI Version 3.4

NOTICE 10/9/2019 Updated the Marine Zones. 9/4/2019 Fixed the weather maps due to NOAA moving them. 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

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Sunrise 6:58AM

Sunset 5:51PM

Tuesday December 10, 2019 6:26 AM HST (16:26 UTC)

Moonrise 4:31PM

Moonset 5:11AM

Illumination 98%

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.

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7 Day Forecast for Marine Location Near Kekaha, HI

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Area Discussion for -

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FXHW60 PHFO 101339 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 339 AM HST Tue Dec 10 2019

SYNOPSIS. Light easterly winds will persist through Wednesday, which will allow the land and sea breeze regime to continue for most areas. Outside of a few clouds and showers setting up over interior areas each afternoon due to sea breezes, mostly dry and stable conditions are anticipated through this time. A modest increase in moisture is expected through the second half of the week as an upper disturbance and cold front approach and move into the area. Shower coverage will trend up through this time with breezy northeast to east trade winds returning. A more typical trade wind pattern appears likely for the upcoming weekend as drier air fills in.

DISCUSSION. Water vapor imagery showed a ridge extending eastward across the region and a shortwave trough far northeast of the state driving a cold front toward the west coast. The surface analysis showed the tail-end of this frontal boundary stretched out from east to west north of Kauai and a weak ridge extending west-southwestward near the islands. Although mostly dry conditions remain in place, an area of enhanced moisture skirting the southern Big Island waters accompanying a trough passing to the south will continue to support isolated to scattered showers in this area through the early morning hours today.

The latest short-term (through Wednesday) guidance depicts the weak ridge near the islands drifting northward as the stalled frontal boundary just north of Kauai diminishes. This will allow light trades to hold over the eastern end of the state. The land and sea breeze regime, however, remains likely over the western end due to the proximity of this ridge axis. The mostly dry and stable regime should continue with the best chance for a few clouds and showers remaining over interior areas each afternoon due to the sea breezes and peak heating.

For the extended period (Thursday through the weekend), guidance depicts lowering upper heights associated with a strong short wave trough approaching and moving into the area Wednesday night through Friday. Although confidence is beginning to increase as the guidance comes into better agreement, there remains some small differences between the solutions with regard to how far east this upper feature and its attendant cold front make it into the area. Despite these differences, increasing moisture and rainfall chances along with gusty trades remain a possibility Thursday through Friday. Breezy trades along with a drying trend is expected over the weekend as high pressure builds north of the state and the front diminishes.

AVIATION. Light winds will remain in the forecast through this period. Expect afternoon sea breezes and overnight land breezes. Most of the state will have VFR conditions. The only exception is the southeast coast of the Big Island, which has clouds and showers this morning which is causing some mountain obscuration.

AIRMET Sierra for mountain obscuration is in effect for the south coast of the Big Island from PHTO to South Cape.

MARINE. The current large northwest swell continues to spread down across exposed coastal waters early this morning. The latest observations from the NDBC buoys, 51001 and 51101, located northwest of Kauai indicate the swell is 9 to 10 feet with a wave period of 13 to 14 seconds. The PacIOOS buoy at Waimea Bay shows the significant wave height about 8 feet with a wave period of around 14 seconds. Therefore, a High Surf Advisory (HSA) remains in effect for most north and west facing shores of the smaller islands.

A significantly larger northwest swell is expected to arrive Wednesday. This swell will likely cause surf to reach the High Surf Warning criteria along most north and west facing shores of the smaller islands starting Wednesday night. This large swell, which is expected to persist into Friday, may also cause surf to reach the HSA criteria along west facing shores of the Big Island starting late Wednesday night or Thursday. The northwest swell is expected to gradually subside from Friday night through Saturday. A new short period north-northeast swell and strengthening trade winds are expected to produce increasing choppy surf along most east facing shores from Friday into Saturday.

The pressure gradient remains disrupted across the main Hawaiian Islands early this morning due to a weak east-northeast to west- southwest oriented frontal boundary located about 125 nm north of Kauai. As a result, the trade winds across the coastal waters remain light to locally moderate. This relatively weak background trade wind flow is expected to persist through Wednesday. We do not anticipate winds will reach the Small Craft Advisory (SCA) criteria over any waters during the next couple of days. That being said, the back to back large northwest swells arriving during the next couple of days will likely cause seas to build. This will result in SCA conditions due to elevated seas starting early Wednesday morning, and continuing into this weekend.

The forecast guidance, which continues to show uncertainties in the details about the winds and weather across the state later this week, appears to indicate a new surface high will build northwest of the islands by Thursday, and move east to a position north of the state later this week. This is expected to push a new front down toward the state from the northwest. The arrival of this front may bring stronger trade winds from Thursday night into Friday. As a result, in addition to the SCA for large seas, winds may reach the SCA criteria over some waters starting Thursday night. For the moment, the forecast indicates these strongest winds will be mainly over the typically windier waters adjacent to the islands of Maui County and the Big Island, and possibly in the vicinity of Kauai. Mariners should monitor future forecasts, since conditions later this week are subject to change due to these forecast uncertainties.

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Advisory until 6 PM HST Wednesday for Niihau-Kauai Windward-Kauai Leeward-Waianae Coast-Oahu North Shore-Oahu Koolau-Olomana-Molokai-Maui Windward West-Maui Central Valley- Windward Haleakala.



DISCUSSION . Gibbs AVIATION . Chevalier MARINE . Houston

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Weather Reporting Stations

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Airport Reports

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Tide / Current Tables for East Island, French Frigate Shoals

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Tide / Current Tables for

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Weather Map

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GEOS Local Image of Hawaii    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for (11,2,3,4)

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Ground Weather Radar Station Kauai, HI

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