Monday, March1, 2021
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Marine Weather and Tides
Honomu, HI

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:38AMSunset 6:26PM Monday March 1, 2021 3:43 PM HST (01:43 UTC) Moonrise 9:13PMMoonset 8:37AM Illumination 88% Phase: Waning Gibbous; Moon at 18 days in cycle
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.
Marine Forecasts
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PHZ122 Big Island Windward Waters- 327 Pm Hst Mon Mar 1 2021
.small craft advisory in effect through Tuesday afternoon...
Tonight..East winds to 25 knots. Wind waves 9 feet. Scattered showers.
Tuesday..East winds to 25 knots. Wind waves 9 feet. Scattered showers.
Tuesday night..East winds 20 knots. Wind waves 8 feet. Scattered showers.
Wednesday..Northeast winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet in the afternoon. Isolated showers.
Wednesday night..Northeast winds 15 knots. Wind waves 5 feet. Northwest swell 5 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 4 feet. Northwest swell 6 feet. Isolated showers in the morning, then scattered showers in the afternoon.
Thursday night..East winds 15 knots. Wind waves 4 feet. Northwest swell 6 feet. Scattered showers.
Friday..East winds 15 knots. Wind waves 4 to 5 feet. North swell 7 to 8 feet. Scattered showers.
Saturday..East winds 15 knots. Wind waves 5 feet. North swell 6 to 7 feet. Scattered showers.
PHZ100 327 Pm Hst Mon Mar 1 2021
Synopsis for hawaiian coastal waters.. Strong high pressure far north of the state will produce strong to gale force trade winds and large rough seas through Tuesday. Trade winds will decrease late Tuesday and Wednesday, then rebuild Thursday and Friday.


7 Day Forecast for Marine Location Near Honomu, HI
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location: 20.04, -155     debug


Area Discussion for -
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FXHW60 PHFO 012000 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 1000 AM HST Mon Mar 1 2021

SYNOPSIS. Windy trade winds will persist through Tuesday and lower to locally breezy speeds during the second half of the week. A more stable air mass is forecast to build over the islands today as the upper level trough weakens and drifts south of the Big Island. An increase of trade wind showers is expected late Thursday into the weekend as an upper level disturbance moves over the state.

DISCUSSION. A 1043 mb high far north of the state will produce windy trades today and a Wind Advisory is in effect across the state. As the air mass stabilizes this afternoon, winds will likely become more gusty with wind gusts of up to 50 mph expected. The Wind Advisory will likely be extended through tonight and potentially through Tuesday as the winds remain strong and gusty through Tuesday. Winds are expected to drop down to moderate to locally breezy speeds during the second half of the week.

As far as precipitation, a drier air mass will begin to move in today which should decrease rainfall amounts over the next several days. With the windy trades in place, we will continue to see passing showers especially during the mornings and nights across windward areas, but rainfall intensities will generally be light to moderate. The next notable increase in showers will likely occur late Thursday through the weekend as moisture from an old frontal boundary moves in across the state. At the same time, an upper level trough will move through the state and will bring unstable conditions across the state. Once again, most of the shower activity will be focused over windward and mountain areas.

AVIATION. The reduction in upstream cloud and shower coverage noted on regional satellite imagery is a sign of the drier airmass now filtering into the area. Ceilings have improved in most areas, although ceilings in the low VFR range will persist in the near term. Shower intensity is forecast to diminish this afternoon as mid- level moisture quality diminishes and convective tops lower, though locally strong trades will continue to focus showery weather over windward areas through the forecast period.

AIRMET Sierra for mountain obscuration remains in effect for Windward Maui and Big Island.

AIRMET Tango for moderate to severe lee turbulence remains in effect. Tango also remains in effect for locally strong surface winds.

MARINE. Strong to locally gale force trade winds continue as strong high pressure holds far north of the state. A Gale Warning is in effect for the typically windy waters around the Big Island and Maui County, and a Small Craft Advisory (SCA) remains posted for all remaining waters due to a combination of winds and large seas. The surface high will weaken and be replaced by another surface high far northwest of the islands on Tuesday, starting a short-lived downward trend in the trade winds. The Gale Warning will be dropped by Tuesday afternoon, and although winds will be on a decline, the SCA will likely remain posted for all waters due to lingering high seas Tuesday night. The SCA may be briefly and entirely dropped by Wednesday as winds and seas decline to border line SCA levels. Trade winds should increase again on Thursday and Friday then hold through the weekend.

Large trade wind-driven seas will maintain high surf along east facing shores for the next couple of days. Nearshore buoys have been holding at 10-12 ft at 10-11 seconds since last night, and these fully developed seas will continue to produce rough east shore surf well above the 8 foot High Surf Advisory (HSA) threshold into Tuesday. As trade winds over and upstream of the islands weaken, east shore surf will decline to border line HSA levels Wednesday, and the HSA will likely be dropped by Thursday. Expect east shore surf to be just below HSA levels late this week and during the weekend.

Surf will remain below advisory levels on other shores through much of the week. Exposed portions of north and south facing shores will pull in some wrapping trade wind swell and keep south shore surf near winter average into Tuesday, followed by a decline late Tuesday and Wednesday. A northwest swell will arrive on Wednesday, peak on Friday, then shift out of the north and decline during the weekend. The bulk of the swell will pass just east of the islands, though north shore surf may reach HSA levels Friday and Saturday.


HFO WATCHES/WARNINGS/ADVISORIES. Wind Advisory until 6 PM HST this evening for Kauai-Oahu-Molokai- Lanai-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-South Big Island-Big Island North and East-Kohala.

High Surf Advisory until 6 PM HST Tuesday for Kauai Windward- Oahu Koolau-Olomana-Molokai Windward-Maui Windward West-Windward Haleakala-South Big Island-Big Island North and East.

Gale Warning until 6 PM HST Tuesday for Maalaea Bay-Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.

Small Craft Advisory until 6 PM HST Tuesday for Kauai Northwest Waters-Kauai Windward Waters-Kauai Leeward Waters-Kauai Channel- Oahu Windward Waters-Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters-Maui County Leeward Waters-Big Island Windward Waters.



DISCUSSION . Kino AVIATION . JVC MARINE . Wroe


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51206 18 mi60 min 76°F12 ft
ILOH1 - 1617760 - Hilo, HI 22 mi55 min ENE 8 G 11 76°F 76°F1019.8 hPa
KWHH1 44 mi55 min WSW 12 G 14 81°F 77°F1016.4 hPa
KLIH1 - 1615680 - Kahului Bay, Maui, HI 98 mi55 min ENE 19 G 25 74°F 74°F1020.9 hPa

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI22 mi50 minNE 1210.00 miMostly Cloudy79°F61°F54%1020.8 hPa

Link to 5 minute data for PHTO

Wind History from HTO (wind in knots)
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Last 24hrNE11NW7W8N5NE16NE10NE10
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E12CalmSW3NE3E9SW45E9E10NE9E13NE14NE14NE12NE12
1 day agoE10E8E6NE8E5SE10
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6SW8NW6S4W6SE4N3W7W7SW3W5S4SW6N7E5NE8--NE7
2 days agoE8E7SE7CalmW6CalmCalmW10SE6S8SW10SW3W5W3S6N6W6SW6NW4N6N7N73E6

Tide / Current Tables for Hilo, Hawaii Island, Hawaii
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Hilo
Click for Map
Mon -- 04:28 AM HST     2.25 feet High Tide
Mon -- 06:39 AM HST     Sunrise
Mon -- 08:37 AM HST     Moonset
Mon -- 11:05 AM HST     -0.02 feet Low Tide
Mon -- 05:14 PM HST     1.93 feet High Tide
Mon -- 06:25 PM HST     Sunset
Mon -- 09:13 PM HST     Moonrise
Mon -- 11:11 PM HST     0.32 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.511.522.22.221.510.50.1-00.10.40.91.41.81.91.91.61.20.80.50.3

Tide / Current Tables for Hilo, Hilo Bay, Hawaii
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Hilo
Click for Map
Mon -- 04:38 AM HST     2.55 feet High Tide
Mon -- 06:39 AM HST     Sunrise
Mon -- 08:37 AM HST     Moonset
Mon -- 11:02 AM HST     -0.08 feet Low Tide
Mon -- 05:06 PM HST     2.07 feet High Tide
Mon -- 06:25 PM HST     Sunset
Mon -- 09:13 PM HST     Moonrise
Mon -- 11:00 PM HST     0.16 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.91.62.12.52.52.31.81.10.50.1-0.10.10.411.51.92.121.61.10.70.30.2

Weather Map
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GEOS Local Image of Hawaii    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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