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Marine Weather and Tides Launiupoko, HI Version 3.4

NOTICE 12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed. 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.

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Sunrise 7:04AM

Sunset 6:09PM

Sunday January 19, 2020 2:49 AM HST (12:49 UTC)

Moonrise 2:28AM

Moonset 2:01PM

Illumination 32%

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 Launiupoko, HI

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Area Discussion for -

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FXHW60 PHFO 190618 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 818 PM HST Sat Jan 18 2020

SYNOPSIS. Locally breezy trade winds will continue through the holiday weekend as surface high pressure passes north of the state. Stable conditions will produce only light showers across windward areas of Kauai and Oahu, while modest showers will persist on windward Big Island and Maui County. Trades will diminish and shift southeasterly on Tuesday, followed by a stable land and sea breeze pattern Wednesday through Friday.

DISCUSSION. A stable and breezy northeasterly trade wind flow remains in place. The trades are being driven by a 1026 mb surface high centered about 750 miles northwest of the state, and a mid level ridge building in from the west is producing very stable conditions with an inversion ranging about 4,000 over western islands to nearly 8,000 ft near the Big Island. Stable stratocumulus clouds are piled up along windward slopes and waters around Kauai and Oahu, where scant rainfall occurred today and is expected tonight. A small pocket of moisture is moving onto windward slopes of Maui and the Big Island, where modest rainfall of generally less than a half inch is due tonight.

A stable, rather dry, and breezy trade wind flow will dominate over most areas this holiday weekend. Surface high pressure will passing north of the state will produce locally breezy trades, and mid level ridging will maintain stable conditions with a strong low level inversion. Showers will remain slightly active through tomorrow across windward slopes of the Big Island and Maui, with a few afternoon showers on Kona slopes. Otherwise, at times extensive cloud cover over windward areas will only produce light showers, while leeward weather will remain dry. With dew points hovering in the upper 50s to lower 60s in the breezy trades, it will feel cool, even though temperatures will be close to January normal.

Trades will gradually decline on Monday night and Tuesday as the surface high moves off to the east. Stable trade wind weather will persist, with light showers confined to windward slopes and afternoon sea breezes possible by Tuesday.

Trades will likely be disrupted for the second half of the work week as an approaching front pushes the surface ridge over the islands. A stable land and sea breeze pattern is expected. The GFS and ECMWF are now showing the front stalling near or just north of Kauai on Friday night and Saturday as trades gradually rebuild.

AVIATION. Moderate to strong northeast trade winds flow will continue through Sunday as a high pressure system passes north of the islands. Expect AIRMET Tango for low level turb below 7k feet south through west of mountain ranges of all islands to continue through 191600 UTC.

An area of clouds and showers with MVFR conditions came on shore affecting the windward sections of Molokai and Maui, resulting in AIRMET Sierra for mountain obscuration. We expect this area of weather to thin out by sunrise Sunday. The tops of these clouds and showers are no higher than 8k feet, and bases are around 2k feet as per surface observations. The intensity of these showers are mainly light but with some brief vis restrictions. This same area of clouds and showers is currently moving onshore of the Big Island's Hamakua coast. This area poses a threat of issuing AIRMET Sierra at any time. As for Oahu and Kauai, they are being affected by a large broken to overcast deck of stable stratocumulus clouds with cloud bases around 35 hundred feet. Tops are around 5 to 6k feet. They contain some isolated to patchy light showers or drizzle with no apparent vis restrictions. Fair skies ruled the lee areas of Molokai and Maui and the lee side of the Big Island. Lanai may get some brief periods of low clouds as they leak over from windward Maui.

MARINE. A high northwest of the area will move east through the coming week. The high is producing strong to near-gale force northeast trade winds over the Hawaii coastal waters. A Small Craft Advisory (SCA) is in effect for all Hawaiian waters through Sunday night due to a combination of the strong winds and elevated seas. As the high moves farther east, winds will shift out the east and weaken below SCA speeds by Tuesday. On Wednesday a ridge will shift south over the coastal waters. Winds speeds will become gentle to moderate and wind directions variable.

The strong trade winds are producing moderate rough surf along north and east facing shores. This surf will gradually subside next week as the trades weaken.

A new swell building Sunday may boost surf to High Surf Advisory levels along north and west facing shores Sunday afternoon into Monday. This swell will gradually lower from late Monday through Tuesday.

A very large northwest swell building on Wednesday may produce surf reaching the High Surf Warning threshold. As that swell subsides, an even larger northwest swell may arrive next weekend.

Surf will remain small along south facing shores.

HFO WATCHES/WARNINGS/ADVISORIES. Small Craft Advisory until 6 AM HST Monday for all Hawaiian waters.



DISCUSSION . Wroe AVIATION . H Lau MARINE . Donaldson

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI	12 mi	55 min	NE 13 G 18	73°F	75°F		1019.3 hPa
51205	18 mi	49 min			77°F	9 ft
51202 - Mokapu Point, HI (098)	66 mi	49 min			77°F	8 ft

Wind History for Kahului, Kahului Harbor, HI

(wind in knots)    EDIT      (on/off)   Help

3 AM

4 AM

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

4 PM

5 PM

6 PM

7 PM

8 PM

9 PM

10 PM

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12 AM

1 AM

2 AM

Last 24hr

NE15 G19

NE14 G19

NE12 G19

NE12 G15

NE8 G11

NE11 G16

NE15

N13 G16

N12

N16

N15

NE15

N10 G13

NE18 G22

NE15 G19

NE11 G18

NE11 G15

NE10 G15

NE15 G21

NE14 G18

NE12 G19

NE12 G17

NE11 G20

NE12 G17

1 day ago

W1

W4

NE1 G4

N11

N15

NW13

N11 G14

E2 G5

NE17

NE17 G22

NE18 G22

NE17

NE15 G19

NE13 G19

NE14 G17

NE14 G19

NE14 G19

NE11 G18

2 days ago

NE3

N1

NW5

E1

NW5 G8

NE3

--

W2

W2

--

NE1

NW1

S2

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Kahului, Kahului Airport, HI	14 mi	55 min	NE 17	10.00 mi	A Few Clouds	72°F	60°F	66%	1019.7 hPa
Lanai City, Lanai Airport, HI	15 mi	53 min	E 13 G 22	1.25 mi	A Few Clouds with Haze	65°F	59°F	81%	1017.6 hPa

Link to 5 minute data for PHJH

Wind History from HJH (wind in knots)

	7 PM	8 PM	9 PM	10 PM	11 PM	12 AM	1 AM	2 AM	3 AM	4 AM	5 AM	6 AM	7 AM	8 AM	9 AM	10 AM	11 AM	12 PM	1 PM	2 PM	3 PM	4 PM	5 PM	6 PM
Last 24hr	--	--	--	--	--	--	--	--	--	--	--	--	NE10 G21	N13	N14	N14	NE11 G21	NE12 G23	N15 G26	N14 G26	N12 G23	N11 G22	NE15 G26	NE15 G25
1 day ago	--	--	--	--	--	--	--	--	--	--	--	--	N8	N10 G17	NE12 G22	NE14	N15	NE12	NE14 G21	N19 G25	N18 G24	NE14 G24	N15 G27	N16 G25
2 days ago	--	--	--	--	--	--	--	--	--	--	--	--	E8	N13	5	4	5	--	SW8	6	5	5	4	4

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Tide / Current Tables for Lahaina, Maui Island, Hawaii

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Tide / Current Tables for Kihei, Maui (Hawaii) (2)

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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

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Wind Forecast for (7,2,3,4)

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Ground Weather Radar Station Molokai, HI

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