Tuesday, December10, 2019
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Marine Weather and Tides
Wailuku, 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

Sunrise 6:50AMSunset 5:46PM Tuesday December 10, 2019 4:22 PM HST (02:22 UTC) Moonrise 4:55PMMoonset 5:27AM Illumination 99% Phase: Full Moon; Moon at 14 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- 320 Pm Hst Tue Dec 10 2019
Tonight..North winds 15 knots. Wind waves 2 feet or less.
Wednesday..Northeast winds 10 knots. Wind waves 2 feet or less.
Wednesday night..North winds 15 knots. Wind waves 2 feet or less.
Thursday..Northeast winds 15 knots. Wind waves 2 feet or less. Isolated showers in the afternoon.
Thursday night..East winds 20 knots. Wind waves 3 feet. Isolated showers.
Friday..Northeast winds 20 knots. Wind waves 3 feet. Isolated showers in the morning, then scattered showers in the afternoon.
Friday night..North winds 20 knots. Wind waves 3 feet. Scattered showers in the evening. Isolated showers after midnight.
Saturday..North winds 20 knots. Wind waves 3 feet. Isolated showers.
Sunday..North winds 20 knots. Wind waves 3 feet.
PHZ100 320 Pm Hst Tue Dec 10 2019
Synopsis for hawaiian coastal waters.. A weak front 125 nm north of kauai will gradually dissipate overnight as a surface ridge holds about 225 miles north of kauai. A new front will stall just northwest of kauai Wednesday night and Thursday as strong surface high pressure builds far to the northwest. Very large northwest swells are due from late Wednesday into Friday.


7 Day Forecast for Marine Location Near Wailuku, HI
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location: 20.9, -156.49     debug


Area Discussion for -
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FXHW60 PHFO 110150 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 350 PM HST Tue Dec 10 2019

SYNOPSIS. Mostly dry weather and light winds will continue through Wednesday as a stable airmass lies over the area. A front will be near Kauai on Thursday with increasing shower coverage expected especially over the west end of the state. Showers will be most numerous over windward and mauka areas as trade winds strengthen due to high pressure building in to our north. A bit drier weather is expected over the weekend and the front weakens into a trough and begins to move away from the area.

DISCUSSION. High pressure lies far to the east-northeast of the area while a ridge extends west-southwest from the high to a position just north of Kauai. This places the islands in light easterly flow. Winds are light enough allowing for local land and sea breeze development. The airmass over the area is dry and stable as indicated by the 00Z soundings. Thus very little in the way of rainfall is expected overnight.

On Wednesday, a broad upper level trough along with its associated frontal system will be approaching the area from the northwest. Winds will remain light continuing to favor daytime sea breezes and nighttime land breezes. A few showers may develop during the afternoon hours mainly over interior areas.

By Thursday, the front will be located just northwest of Kauai with the upper trough digging down just west of the state. Winds will remain on the lighter side favoring an easterly direction. However they will be light enough for some continuation of local land and sea breeze circulations. Shower coverage is expected to increase over and around Kauai with some increase possible over interior areas of the other islands.

The front is forecast to reach Kauai on Friday with shower activity increasing especially over the west end of the state. Meanwhile, strong high pressure will be building in northwest of the state. This will result in strengthening trade winds especially over the west end of the island chain. This wind direction along with the front's moisture field, will cause windward and mauka areas to receive the majority of the showers but some will likely spill over to leeward areas as well.

The high will be passing by north of the area Friday night and Saturday with moderate to locally breezy trade winds expected across the entire area. Meanwhile the front will have weakened into a trough with its moisture field beginning to shift westward. Shower coverage will likely taper off but there will still be passing windward and mauka showers at times with some leeward spillover still a possibility on into Sunday.

Sunday night and Monday, a new high will be building in north- northwest of the area. Moisture associated with the old front may get caught up in increasing northeast flow with increasing shower activity possible especially over windward and mauka areas.

AVIATION. With a weak background flow from the east, nighttime land breezes and daytime sea breezes will develop over the much of the state through Wednesday. VFR will predominate over most areas most of the time.

One area where MVFR still exists, though, is over southeast portions of the Big Island, where lower ceilings and showers persist, though they are on the decrease. Thus, AIRMET Sierra for mountain obscuration remains in effect for the Big Island from Apua Point to South Cape. However, the AIRMET will likely be cancelled at the next issuance time of 0400Z/1800 HST.

MARINE. Trade winds will remain at gentle to locally moderate strength through tomorrow, with stronger winds expected to develop Thursday night and Friday. A surface ridge currently sits about 225 nm north of Kauai, while a weak front is falling apart about 125 miles north of the Garden Isle. Locally, little change is due through tomorrow. Another front will approach then stall just northwest of Kauai on Thursday as strong high pressure builds to the distant northwest. Trade winds will increase locally late Thursday, and as the front is pushed down to near Kauai on Friday and the strong high passes to the north, winds should build further, especially around Kauai. The front will weaken and retreat to the west by Saturday, and local winds will decline to moderate to fresh strength as the high moves off to the northeast. Expect stronger trade winds Sunday and Monday as another area of high pressure passes far north of the state.

Northwest swell will hold around similar heights through tonight then rise significantly on Wednesday. NDBC buoys northwest of Kauai have been registering the swell at 9 to 11 ft at 13 to 14 seconds today, with some increase in energy within the 15 to 16 range noted recently, and local PacIOOS buoys have been measuring the swell at 6 to 7 ft. Border line advisory surf is expected to continue across most north and west facing shores from Kauai to Maui tonight, followed by a significant rise in swell Wednesday and Wednesday night. A High Surf Warning has been posted for this rise, even though warning level surf is not expected until afternoon on Kauai and Oahu and on Molokai and Maui until evening. The large surf will peak early Thursday then decline below the advisory level late Friday. Another pulse of northwest swell may produce advisory level surf early next week.

Surf along east facing shores will be remain below seasonal average for the next few days, then pick up. Strong northeast winds along the front that will stall near Kauai will likely send large, short period swells to Kauai and Oahu THursday night and Friday, with east shore surf dropping down to near or below seasonal average during the weekend.

A Small Craft Advisory (SCA) has been issued for hazardous seas building tonight and Wednesday. The SCA covers waters around Kauai and north of Oahu tonight, then expands to most waters exposed to the northwest swell on Wednesday. The SCA may need to be expanded for locally strong trade winds Thursday night or Friday. Border line SCA conditions are due on Saturday for both seas and local winds, though stronger trades will probably require an SCA for the typically windy waters around the Big Island and Maui Sunday onward.

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

Small Craft Advisory from 6 AM Wednesday to 6 PM HST Thursday for Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters-Big Island Windward Waters.

Small Craft Advisory from midnight tonight to 6 PM HST Thursday for Kauai Northwest Waters-Kauai Windward Waters-Kauai Leeward Waters-Kauai Channel-Oahu Windward Waters.



DISCUSSION . Burke AVIATION . Kinel MARINE . Wroe


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 1 mi59 min NNE 14 G 17 79°F 1014.4 hPa
51205 9 mi53 min 79°F9 ft
51213 29 mi53 min 82°F4 ft
51202 - Mokapu Point, HI (098) 72 mi53 min 80°F5 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI3 mi29 minNE 139.00 miA Few Clouds85°F70°F61%1014.5 hPa
Lahaina - West Maui, HI11 mi38 minNE 1015.00 miA Few Clouds84°F68°F58%1014.6 hPa

Link to 5 minute data for PHOG

Wind History from HOG (wind in knots)
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Last 24hrNW7W5NW4E6E5S3SE5SE6CalmCalmCalmSE4SE6S5S3SE3CalmN4NW7NE10NE10NE12NE12NE13
1 day agoN6NE8E5E6E6CalmCalmE4NE3CalmN8CalmSE3SE4E7SE4NE3NE12N13N13NE13NE14N11W7
2 days agoN6NE5NE4CalmSE5S3SE5SE6CalmS5CalmSE6S4S6S3S4CalmNE7NE6N7N9N9NE9NE9

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii (2)
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Kahului
Click for Map
Tue -- 01:18 AM HST     2.56 feet High Tide
Tue -- 05:26 AM HST     Moonset
Tue -- 06:51 AM HST     Sunrise
Tue -- 08:24 AM HST     0.63 feet Low Tide
Tue -- 12:42 PM HST     1.32 feet High Tide
Tue -- 04:55 PM HST     Moonrise
Tue -- 05:45 PM HST     Sunset
Tue -- 06:42 PM HST     0.10 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.42.52.52.31.91.51.10.80.60.70.81.11.31.31.210.70.40.10.10.30.71.21.8

Tide / Current Tables for Kihei, Maui (Hawaii) (2)
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Kihei
Click for Map
Tue -- 03:10 AM HST     2.46 feet High Tide
Tue -- 05:26 AM HST     Moonset
Tue -- 06:51 AM HST     Sunrise
Tue -- 09:43 AM HST     0.43 feet Low Tide
Tue -- 02:34 PM HST     1.22 feet High Tide
Tue -- 04:55 PM HST     Moonrise
Tue -- 05:45 PM HST     Sunset
Tue -- 08:01 PM HST     -0.10 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.522.32.52.42.11.61.10.70.50.40.60.811.21.210.70.30-0.1-00.30.7

Weather Map
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wmap_P
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (21,6,7,8)
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Ground Weather Radar Station Molokai, HI
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