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Marine Weather and Tides Koloa, 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 6:19AM

Sunset 6:49PM

Sunday April 5, 2020 9:49 AM HST (19:49 UTC)

Moonrise 4:49PM

Moonset 4:56AM

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 Koloa, HI

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Area Discussion for -

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FXHW60 PHFO 051946 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 946 AM HST Sun Apr 5 2020

SYNOPSIS. A low to our northwest and a displaced ridge to our east will keep winds light across the islands through the week. Showers will favor mauka areas during the day and areas near the coast at night. Increased moisture will slide northward tonight through Tuesday, bringing the potential for locally heavy downpours and a few thunderstorms.

DISCUSSION. The pressure gradient between a low far northwest of Kauai and a ridge far northeast of Hilo remains slack, keeping winds quite light across the area this morning. Local land breezes were apparent overnight. Satellite loop shows scattered low clouds and mostly clear skies across most sections of the smaller islands. Patchy broken to overcast low clouds are noted across southeast facing shores and slopes of Maui and the Big Island. Additionally, broken high clouds attempt to obscure the view of lower clouds east of Oahu. Radar shows scattered showers moving into east and southeast facing slopes of Maui and the Big Island, with very little shower activity noted elsewhere.

Models show the low northwest of the islands will gradually lift northeastward away from the state during the next couple of days, while the ridge to our northeast remains nearly stationary. A weakening frontal boundary will move into the western islands Monday night or Tuesday, then gradually dissipate as it drifts eastward across the chain through the remainder of the week. Frontal remnants may linger across the eastern end of the state into next weekend. Background wind flow will remain light, allowing development of local land and sea breezes.

Showers will continue to favor coastal areas at night and mauka areas during the day as an alternating pattern of land and sea breezes continues through the week. Increased moisture will be drawn northward over the islands tonight through Tuesday. Combined with troughing aloft, this increased moisture will broaden shower coverage and boost shower intensity statewide, with some locally heavy rainfall and even a few thunderstorms possible. Models suggest shower coverage will decrease over the western islands Wednesday through late next week as the deepest moisture shifts eastward.

AVIATION. Stalled or quasi-stationary boundary just to the northwest of Kauai will give Kauai and possibly Oahu the chance for clouds and showers. There are also showers on the south/southeastern portions of the Big Island and the southeast waters. Expect similar conditions to yesterday where we have light winds and sea breeze development on the islands. Land breezes will develop tonight into Monday.

AIRMET Sierra is still in effect for the north through east sections of the Big Island as well as east sections of Maui, Molokai, and Lanai.

Turbulence models indicate moderate turbulence over the state from 23K to 30Kft and it looks as if this will be the case for at least a good portion of today, possibly into Monday.

MARINE. The current light to locally moderate wind regime is expected to persist through early this week. The overall background flow will generally be from the southeast to south as a boundary slowly approaches the area from the northwest. As it approaches, a broad area of convergent southeast to south flow is expected to set up over the state late today or tonight, extending through Tuesday. This will likely result in a period of unsettled weather with locally heavy rainfall, and possibly thunderstorms. With seas and swells expected to stay below Small Craft Advisory thresholds for much of the upcoming week, the main threat to mariners will be associated with any thunderstorm development.

The new north-northwest swell has peaked and is expected to steadily decrease through the day. As this swell lowers, a new 3- to 4-foot long-period west-northwest swell will slowly begin to fill in tonight. This swell is expected to peak Monday night and will be followed by a moderate northwest swell arriving late Tuesday. This second swell should be slightly larger and is expected to peak Tuesday night or early Wednesday. Surf is expected to remain below the High Surf Advisory criteria along north and west facing shores with these swells.

A series of small south to south-southeast swells are expected during the upcoming week. Surf is expected to reach the summer average by Tuesday, followed by another small pulse later this week. Surf along east facing shores will remain small through the upcoming week due to the lack of trades.

HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . Powell AVIATION . Chevalier MARINE . Kinel

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
NWWH1 - 1611400 - Nawiliwili, HI	8 mi	50 min	Calm G 1.9	75°F	79°F		1015.2 hPa
51208	27 mi	20 min			77°F	7 ft
51201 - Waimea Bay, HI (106)	74 mi	20 min			77°F	5 ft

Wind History for Nawiliwili, HI

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SE9 G14

S5 G14

SE6 G10

S7 G11

S10 G15

S10 G15

S10 G16

S6 G11

S8

SW5

NE2

SW3

W4

W5

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SW5

N2

NW1

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1 day ago

S7 G10

S7 G10

SE4 G8

S5 G11

S5 G9

S7 G13

S8 G12

E2 G10

SE8 G13

S5 G12

SE4 G10

S6

SE8

SE5

SE9 G14

S6 G9

S3 G9

SE6

SE5

S6 G12

S8

SE7 G10

S3 G9

SE4 G8

2 days ago

E2

E5

SE8

SE9

SE8

SE8

SE6

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SE6

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SE8

SE6

W3 G8

W10

SW4

NW6

W1

W3 G6

W3 G6

SW5 G8

SE11

S7 G11

SW5 G8

SE4 G11

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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	9 mi	57 min	S 6	10.00 mi	Fair	77°F	71°F	82%	1015 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI	20 mi	54 min	SSE 9	10.00 mi	Fair	79°F	66°F	65%	1014.4 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)

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S9

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S14

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S6

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N5

Calm

3

W4

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W5

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1 day ago

S10

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2 days ago

4

E7

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SE10

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SE10

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W7

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Calm

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Calm

S7

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S11

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Tide / Current Tables for Port Allen, Hanapepe Bay, Kauai Island, Hawaii

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Tide / Current Tables for Nawiliwili, 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 (15,3,4,5)

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Ground Weather Radar Station Kauai, HI

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