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Marine Weather and Tides Hana, HI Version 3.4

NOTICE 8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it. 8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue. 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 6:15AM

Sunset 6:16PM

Tuesday September 29, 2020 5:03 PM HST (03:03 UTC)

Moonrise 5:26PM

Moonset 4:30AM

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 Hana, HI

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Area Discussion for -

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FXHW60 PHFO 300136 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 336 PM HST Tue Sep 29 2020

SYNOPSIS. A weakened ridge just north of the islands will keep winds light and variable into Saturday. Sea breezes will develop each afternoon, increasing cloud cover across mauka areas and producing light rainfall mainly in the late afternoon to early evening hours. Overnight land breezes will clear out any cloud cover and push lingering shower activity offshore. Increased moisture moving into the area from the east may slightly increase shower activity by Wednesday night.

DISCUSSION. There is little forecast philosophy change from this morning. A stalled front north of Kauai has weakened the subtropical ridge, keeping winds light and variable across local waters. Afternoon soundings and satellite loop show that increased moisture and showery low clouds have arrived across portions of the Big Island, where a PW value near 1.3 inches was noted in the Hilo sounding. In contrast, the Lihue sounding showed less than 0.9 inches of PW. Cloud cover has increased noticeably across the Big Island, where broken to overcast low clouds cover most leeward and interior areas. Windward Big Island shores and slopes south of Laupahoehoe have scattered low clouds at this hour. The smaller islands have scattered to patchy broken low clouds across mauka areas. Additional moisture slowly drifting into the islands from the east may reach us Wednesday, possibly increasing shower activity Wednesday night into Thursday morning.

Models show the current pattern will remain in place through the rest of this week, with the subtropical ridge weakened and pushed south near the islands by a stalled front farther to the north. Winds will stay light, allowing local land and sea breezes to develop. Expect increased cloud cover across mauka areas each afternoon and evening, with possible light rainfall. Cloud cover will decrease each night with the development of land breezes.

By Sunday, the front is forecast to weaken and lift out, allowing the subtropical ridge to drift back northward. The pressure gradient will then steepen enough across the state to drive moderate to locally breezy trade winds briefly on Sunday. Light to moderate trades are then expected from Monday onward.

AVIATION. Lack of clouds over inland portions of Kauai through Molokai are a testament to the dry airmass currently in place. Expect very little additional development today even with locally enhanced convergence along sea breezes. As upstream moisture continues to work into the area, clouds and showers presently ongoing over northern portions of the Big Island will expand in coverage to encompass a greater segment of the Windward Big Island coast as well as Maui though VFR is still expected to prevail. Inland cloud development tomorrow may be more efficient than today due to increasing low-level moisture. Land breezes redevelop again tonight.

No AIRMETs are in effect.

MARINE. Light to moderate north easterly trades will allow for a land and sea breeze pattern to continue through the rest of the week. The background flow will shift out of the east Friday into the weekend. A return of fresh easterly trade winds will be possible by then end of the weekend.

Surf along south facing shores will gradually lower through the rest of the week. A late season south swell may arrive locally early next week. More details will follow later in the week once the swell moves through the nearshore PacIOOS spectral buoy in American Samoa.

Surf along north will trend up tonight through the weekend as back- to-back north- northwest swells arrive. The first one is from a storm- force low centered around 1600 nm north of Kauai this afternoon. This source will arrive tonight and gradually become more northerly Wednesday through Thursday as it peaks near the advisory level (15 ft faces). The second swell is forecast to arrive Thursday night, which should keep the surf near the advisory level through the day Friday. This swell combined with a smaller, medium period northwest arriving Friday night into Saturday will keep the surf up through the weekend.

Small east swell from former tropical cyclone Lowell in the eastern Pacific will gradually subside tonight. East swell will continue to subside through the rest of the week due to decreasing tradewinds. Small east tradewind swell will return later over the weekend due to the return of easterly tradewinds. A longer period swell may impact exposed east facing shores due to tropical cyclone Maria in the eastern Pacific.

HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . Powell AVIATION . JVC MARINE . Almanza/Kino

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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	27 mi	45 min	N 9.9 G 12	80°F	81°F		1011.4 hPa
51205	29 mi	37 min			82°F	5 ft
ILOH1 - 1617760 - Hilo, HI	87 mi	45 min	N 9.9 G 13	78°F	83°F		1009.6 hPa

Wind History for Kahului, Kahului Harbor, HI

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

5 PM

6 PM

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12 AM

1 AM

2 AM

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5 AM

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Last 24hr

NE12

NE11

NE8 G13

NE9

NE8 G11

N8

N10

NE7 G10

N5

N6

NE6 G9

NW9

NW3

N4

NW6

N7

NE10

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N11

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NE10 G13

N7 G11

1 day ago

E16 G22

E16 G22

E12 G17

E11 G17

E11 G17

NE11 G14

NE9 G15

E4

N1

NW1

NW10

SE1

W2

E4 G9

NE2

NE9 G12

NE10 G13

NE10 G15

NE11 G17

NE14 G17

NE12 G15

NE12 G16

N12

NE12 G16

2 days ago

NE15 G20

NE17 G22

E18 G24

NE15 G20

NE14 G18

NE11 G15

E15

E10 G14

E5 G8

E6 G10

NE13 G16

NE11 G16

N8 G11

N7

NE8

NE10

E12 G17

NE13 G16

NE16 G21

E22

NE16 G20

NE17 G21

E18 G23

E20 G25

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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	25 mi	69 min	NNE 12	10.00 mi	A Few Clouds	87°F	68°F	53%	1011.7 hPa

Link to 5 minute data for PHOG

Wind History from HOG (wind in knots)

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NE13

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N8

SW3

Calm

Calm

Calm

N4

Calm

Calm

NE4

NE11

N11

NE13

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N14

N12

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1 day ago

NE15

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NE4

Calm

SE4

S4

SE6

Calm

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Calm

NE5

NE12

NE15

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NE20

NE20

N17

N16

N16

NE16

2 days ago

NE19

NE13

NE13

NE11

NE10

NE12

E8 G16

E6

E6

NE11

NE8

N6

N6

Calm

NE12 G19

NE12 G19

NE16

NE18

NE18 G29

NE19 G27

NE20 G27

NE19 G27

E19 G27

E21 G27

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Tide / Current Tables for Hana, Maui Island, Hawaii

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Tide / Current Tables for Kihei, Maui (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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Ground Weather Radar Station Kohala, HI

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