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Marine Weather and Tides Hilo, 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 5:48AM

Sunset 7:04PM

Monday July 13, 2020 3:36 PM HST (01:36 UTC)

Moonrise 12:30AM

Moonset 1:11PM

Illumination 38%

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 Hilo, HI

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Area Discussion for -

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FXHW60 PHFO 131946 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 946 AM HST Mon Jul 13 2020

SYNOPSIS. Trade winds will weaken tonight and Tuesday, then remain on the lighter side for the next several days before strengthening over the weekend. The trade winds will deliver passing showers that will primarily favor windward areas during nights and mornings, but the lighter winds will allow some afternoon clouds and showers to develop over leeward areas.

DISCUSSION. Trade winds will diminish tonight and Tuesday, then remain on the lighter end of the spectrum for the next several days, with wind speeds increasing next weekend.

The local winds are expected to diminish and veer slightly toward the ESE over the next day or so, even though a surface high pressure cell far NE of the islands moves/changes very little. Instead, the decrease in winds will, in part, be due to weak low-level features passing between the islands and the high, acting to loosen the low- level pressure gradient.

One such feature is a weak low-level trough currently fueling increased trade showers over and near Kauai and Oahu, while Maui county and the Big Island have fewer showers arriving in the short term. An update to the short term forecast was issued to account for latest satellite/radar trends. Another weak low-level trough to the N of the islands (associated with a low aloft) will move W and sharpen to the NW of the islands from Tuesday into Thursday, while a trough marking the remnant of TS Cristina moves between the islands and the high later in the week. Additionally, a front will dig toward the islands from the NW toward the end of the week. All these features will act to keep the flow over the islands veered and diminished.

The lighter winds will allow afternoon leeward sea breezes to drive cloud and shower formation that will diminish after sunset. Warming mid-level temperatures are expected in the short term as the low aloft to the N moves W the next couple of days. A stabilizing mid- level ridge will then prevail into the weekend, and shower coverage and intensity will be limited, especially since most of the moisture slug associated with the remnants of Cristina will pass well N of the islands. As the low aloft moves to a position NW of Kauai, it will continue to deliver some periods of high clouds. Latest guidance has the bulk of the high clouds over Kauai and Oahu, potentially becming thick at times from Tuesday into Thursday.

AVIATION. A high pressure system far to the north northeast will drive moderate to fresh trade winds across the state through at least tonight. Low clouds and showers will impact mainly windward portions Kauai and Oahu into this afternoon, with drier conditions expected across the rest of the state. Mountain obscurations, occasional MVFR ceilings and visibility are expected around these showers. AIRMET SIERRA is posted for tempo mountain obscurations above 2500 feet along north through east sections of Oahu.

The clouds and showers should pass west of Kauai this evening. The next area of moisture is expected to arrive from the east tonight potentially impacting most windward areas.

AIRMET TANGO remains in effect below 8000 feet for south through west of mountains on all islands due to tempo moderate turbulence.

MARINE. High pressure far north-northeast of the islands will keep fresh to strong trades in place through this afternoon. As a result, a Small Craft Advisory (SCA) remains posted for the typically windy waters around Maui County and the Big Island. A couple troughs of low pressure will pass by to the north of the state Tuesday through Friday, easing the trades into the moderate range in most areas, with fresh trades periodically affecting the typically windier channel waters. Trades should then ramp back up to locally strong levels next weekend as high pressure strengthens far to the north of the island chain.

There will be a series of small southerly swells over the next several days that will keep south shore surf near of just above background levels. A slightly larger long period south swell may fill in over the weekend. East facing shores will continue to experience short period surf produced by the trade winds locally and upstream of the state. A small but slightly longer period east swell produced from former tropical cyclone Cristina, may provide a slight uptick in surf heights during the late Tuesday through Thursday time frame. No other significant swells are expected.

HFO WATCHES/WARNINGS/ADVISORIES. Small Craft Advisory until 6 PM HST this evening for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.



DISCUSSION . Birchard AVIATION . Foster MARINE . Kino

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
ILOH1 - 1617760 - Hilo, HI	1 mi	67 min			80°F
51206	7 mi	54 min			79°F	6 ft
KWHH1	45 mi	67 min			82°F

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI

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

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Last 24hr

NE2 G7

NE3 G6

NE4

E4 G7

NW4

SW1

SW1

SW1

N7 G10

SW2

S1

W1

SW2

SW2

SW1

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W1

NW3

N3

N3

N3 G6

NE4 G7

NE6

N3 G7

1 day ago

W5

E2

NE8 G11

W2

W3 G8

W6

SE2

SW2

S3

S1

SE1

NE4

SW1

W3

SW1

SW1

W3

NW1

NW2 G5

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N4

NW5

NE4 G7

N2 G7

2 days ago

E10 G13

E5 G10

E5 G10

E4

S1

W1

W2 G6

SE6 G9

W8 G11

SE2

S2

SW2

S1

SW2

S1

SW1

NW1 G5

W1

W1 G4

N3

N6

N4

E8 G11

NW7

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Hilo, Hilo International Airport, HI	1 mi	44 min	NE 7	10.00 mi	Mostly Cloudy	84°F	69°F	61%	1014.2 hPa

Link to 5 minute data for PHTO

Wind History from HTO (wind in knots)

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N7

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Calm

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NE10

N11

1 day ago

N6

W5

E12

Calm

NW3

Calm

S5

SW4

SW5

S3

Calm

NE3

SW4

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Calm

SW3

Calm

Calm

W4

Calm

N6

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NE8

2 days ago

E12

E8

E7

E7

E3

SW3

W6

SE7

W11

SW4

SW4

SW6

SW5

SW5

Calm

SW4

W10

Calm

3

NE5

N7

NE7

NE12

NE6

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Tide / Current Tables for Hilo, Hawaii Island, Hawaii

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Tide / Current Tables for Kawaihae, Big Island, 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 (21,6,7,8)

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Ground Weather Radar Station Kohala, HI

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