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Marine Weather and Tides Princeville, 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 6:16AM

Sunset 6:51PM

Thursday April 9, 2020 2:01 PM HST (00:01 UTC)

Moonrise 9:09PM

Moonset 7:52AM

Illumination 95%

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 Princeville, HI

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Area Discussion for -

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FXHW60 PHFO 091933 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 933 AM HST Thu Apr 9 2020

SYNOPSIS. Light and variable winds will persist through Friday, with clouds and showers over the islands most likely in the afternoon and evening. An increase in west winds is expected Friday into Saturday as a front approaches from the northwest. The front will bring a wind shift to the north, and a few showers, as it moves down the island chain Saturday night and Sunday. Light to moderate trade winds will begin to return late Sunday and continue through much of next week.

DISCUSSION. Currently at the surface, high pressure systems are located far to the west and northeast of the islands, with an area of low pressure well to the north of the state. Closer to home, a weakening frontal boundary remains over the central islands. The resulting pressure gradient remains quite weak, with land breezes beginning the transition over to sea breezes. Visible satellite imagery shows partly cloudy conditions in most areas, although there area a few areas where cloud cover is more prevalent. Radar imagery shows a few light showers across the state, with most areas rain free at the moment. Main short term concern revolves around rain chances the next few days.

The weak frontal boundary will slide slowly eastward today and tonight, then dissipate by Friday. This will keep a light wind regime in place, featuring daytime sea breezes and overnight land breezes. A new cold front will approach from the northwest Friday through Saturday, bringing an increase in west to southwest winds. The front will slide southeastward across the island chain Saturday night and Sunday, with moderate north winds filling in behind the front Saturday night and shifting around to northeasterly trades on Sunday. High pressure will slide by to the north of the islands Sunday night and Monday, with light to moderate trades prevailing. The trades are expected to ease again Monday night through Tuesday night as surface troughing develops over the islands. Moderate trades are then expected to return Wednesday and continue through late in the week.

As for weather details, a sea/land breeze pattern is expected to continue through Friday, with showers favoring interior mauka areas during the afternoon/evening and locations near the coast at night and during the morning hours. An approaching shortwave trough may de-stabilize things enough for a thunderstorm over the Big Island Friday afternoon, so will mention a slight chance of thunderstorms here. Shower coverage should increase a bit Friday night and Saturday in the low level convergent flow ahead of the approaching front, with assistance from shortwave energy moving overhead. Showers will favor south and southwest facing slopes at night and during the morning hours and interior/mauka locations during the afternoon. A few showers will accompany the front as it slides southeastward through the islands Saturday night and Sunday, but no significant rainfall is expected. We should begin to see an increase in trade wind showers Sunday night and Monday, favoring the typical windward areas. Shower coverage and intensity may then increase Monday night through Tuesday night as surface troughing develops over the islands and some shortwave energy moves overhead. A more typical trade wind pattern should then return by the middle and latter part of next week.

AVIATION. Cloud cover over Maui County continues to thin out and showers that had been impacting portions of the Big Island early this morning have fizzled out. Currently, an area of heavier showers sits about 100 miles east of the Big Island, but things are quiet elsewhere. However, we will see an uptick in afternoon clouds and showers for interior areas thanks to the afternoon sea breezes. Tempo MVFR conditions are possible with any heavier showers that do develop, but expect VFR to prevail.

Land breezes will take over again tonight and clouds and showers will dissipate. No AIRMETs are currently in effect and none are anticipated.

MARINE. An eastward moving and dissipating frontal boundary lies near Maui while the west end of a ridge of high pressure lies just southeast of the Big Island. The overall wind flow is light west- northwest west of the boundary with slightly stronger south and southwest winds out ahead of the boundary, mainly over the waters around the Big Island. Expect generally light winds west of the boundary today with slightly stronger winds east of the boundary. Sea breezes will develop nearshore across most areas today with land breezes developing nearshore tonight.

Winds will remain light Friday and Friday night, favoring a south to southwest direction, as another weak front approaches the area from the northwest. Low level winds will become more westerly on Saturday as the front nears the state. Guidance indicates a weak frontal boundary will pass the area Saturday night and Sunday with north to northeast winds filling in behind it. An area of high pressure will be passing by north of the area Sunday night through Monday night with moderate trade winds returning.

A small, short period northwest swell will continue to fill in today, peak on Friday, then lower gradually Saturday and Sunday. A series of very small, short period north swells will move through the area Saturday through Tuesday. A larger northwest swell is expected to arrive Tuesday night, peak Wednesday and Wednesday night, then lower gradually on Thursday. Surf heights may approach low end advisory levels during the peak of this swell. A series of small south swells will be moving through the area through the weekend and on through the middle of next week. Peak surf heights will likely be on Saturday when the largest of these swells arrive. Due to the lack of trade winds, surf will remain small along east facing shores on into early next week. With the expected uptick in trades around Tuesday and Wednesday, surf heights are expected to gradually pick up at that time.

HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . Jelsema AVIATION . Dye MARINE . Burke

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
51208	7 mi	62 min			79°F	7 ft
NWWH1 - 1611400 - Nawiliwili, HI	20 mi	92 min	E 6 G 8.9	75°F	80°F		1015.7 hPa
51201 - Waimea Bay, HI (106)	82 mi	62 min			78°F	5 ft
51WH0 - WHOTS - Woods Hole Ocean Time-series	87 mi	92 min	NW 3.9		77°F		1015 hPa

Wind History for Nawiliwili, HI

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

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NE9

NE7 G11

NE7 G10

NE6 G10

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NE2

W2

SW3

W1

W4

W4

W5

W5

W5

W5

W4

N2

W6

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NE2

NE3 G6

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E5 G8

E6

1 day ago

NE9 G14

NE10 G15

E9 G15

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W6

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W6

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E1

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E3 G9

E12

2 days ago

SW10

W8 G14

N4 G15

NE10

NE5

S3 G6

S2

W5

SW6

SW5 G9

SW4 G7

NW4

W4

SW2

W2

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NW1

--

SW1

SW5

SW11

SW14 G17

W10 G14

SW11 G16

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Lihue, Lihue Airport, HI	18 mi	69 min	NE 8	10.00 mi	Partly Cloudy	78°F	68°F	71%	1015.1 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI	19 mi	66 min	NNW 7	10.00 mi	Fair	79°F	63°F	58%	1015 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)

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NE10

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Calm

NW4

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Calm

W6

W4

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W3

W6

W7

W6

W6

W7

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NE3

NE5

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NE7

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3

1 day ago

NE12

E11

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SW5

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W7

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Calm

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W6

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N3

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NE10

2 days ago

NE15

NE10

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W7

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SW12

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N14

NE12

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Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii

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Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii

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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 (20,4,5,8)

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Ground Weather Radar Station Kauai, HI

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