Tuesday, March2, 2021
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Marine Weather and Tides
Nanawale Estates, 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 6:37AMSunset 6:27PM Tuesday March 2, 2021 1:05 PM HST (23:05 UTC) Moonrise 10:13PMMoonset 9:18AM Illumination 82% Phase: Waning Gibbous; Moon at 19 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- 946 Am Hst Tue Mar 2 2021
.small craft advisory in effect through Wednesday afternoon...
Rest of today..East winds to 25 knots. Wind waves 9 feet. Scattered showers late in the morning, then isolated showers in the afternoon.
Tonight..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 through the day.
Wednesday night..Northeast winds 15 knots. Wind waves 5 feet. Northwest swell 4 feet increasing to 6 feet after midnight. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 4 feet. Northwest swell 6 feet. Isolated showers.
Thursday night..East winds 15 knots. Wind waves 4 feet. Northwest swell 7 feet. Scattered showers.
Friday..East winds 15 knots. Wind waves 4 to 5 feet. North swell 8 to 9 feet. Scattered showers.
Saturday..East winds 15 knots. Wind waves 5 feet. North swell 7 to 8 feet. Scattered showers.
PHZ100 946 Am Hst Tue Mar 2 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. Trade winds will weaken later today and Wednesday, then restrengthen Thursday and Friday.


7 Day Forecast for Marine Location Near Nanawale Estates, HI
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location: 19.49, -154.81     debug


Area Discussion for -
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FXHW60 PHFO 021958 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 958 AM HST Tue Mar 2 2021

SYNOPSIS. Windy trade winds will persist through today and slowly decrease over the next few days. Locally strong trades will return Friday into the weekend and will likely further strengthen early next week. A wet trade wind pattern is expected Thursday night into the weekend due to another upper level disturbance.

DISCUSSION. This mornings satellite imagery shows some scattered showers across windward areas and a band of moisture roughly 200 miles northeast of the state. For rest of the day today, we will continue to see widespread windy conditions where a Wind Advisory is in effect across the state. Gusts up to 50 mph will be possible through this afternoon.

Starting tonight, we should see a slight decrease of winds and this slight decrease may be enough for winds to drop below the advisory threshold. The band of moisture upstream of the state will arrive this evening and will bring showery conditions across windward and mountain areas this evening through tonight. A drier air mass will follow behind and we should see near normal or slightly drier than normal conditions with locally strong trades for Wednesday.

Starting Thursday night, we should see a notable increase of shower coverage as moisture from an old frontal boundary moves through the state. Friday is looking to be a rather wet day and with unstable conditions aloft, we could see an increasing threat of heavy rain through Saturday. Long range models are hinting at a windy and showery trade wind pattern for the first half of next week.

AVIATION. Strong trade winds will continue to be supported by a surface high to the N, delivering stable and showery low clouds focused over windward slopes and coasts, resulting in periods of MVFR VIS/CIG.

AIRMET Tango remains in effect for moderate to severe low-level turbulence near and downwind of the terrain, for locally strong surface winds, and for moderate mid-level turbulence between FL220 and FL300 due to a trough aloft. Some decrease in low-level wind speed is expected tonight into Wednesday while the turbulence aloft should also diminish as the trough aloft moves E of the area.

MARINE. A Gale Warning is in effect through this afternoon for typical windier waters around the Big Island and Maui County as a strong high pressure north of the states maintains strong to local gale force trade winds. A Small Craft Advisory (SCA) remains posted for all of the remaining waters due to the combination of both strong trade winds and resultant rough seas. The surface high will weaken today and be replaced by another surface high far northwest of the islands. This will create a short- lived downward trend in the trades. In response, the Gale Warning will downgrade to a SCA this evening, allowing for a SCA for all waters through tomorrow afternoon. The SCA may be scaled back briefly to typically windy waters around Big Island and Maui County tomorrow night. Building high pressure to the northwest of the state will boost trades first over waters west of Kauai then the rest of the island chain Thursday into the weekend which may warrant an expansion and continuation of the SCA.

Large trade wind-driven seas will maintain rough east shoreline surf above the 8 foot High Surf Advisory (HSA) threshold through tomorrow afternoon. As trade winds over and upstream of the islands weaken today into tomorrow, surf along eastern exposures will lower to borderline HSA levels by tomorrow evening. A northerly swell is expected to provide some wrap to north exposed east shores end of the week and into the weekend which may maintain surf heights near HSA levels.

Moderate height, long period northwest swell will begin arriving tomorrow afternoon and evening, peaking surf along north and west- facing shores late Thursday into Friday. As mentioned above, a secondary north swell will arrive Friday in tandem with some trade wind swell wrap that will keep surf at, or slightly above, HSA heights end of this week and into the weekend.

Surf along south-facing shores continues to pull in some trade wind swell wrap with an expected slow decline with the easing trades into tomorrow. A long period southwest swell will fill in late tomorrow through Thursday which will keep south shore surf from going flat before slowly declining through the weekend.


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 Wednesday for Kauai Windward- Oahu Koolau-Olomana-Molokai Windward-Maui Windward West-Windward Haleakala-South Big Island-Big Island North and East.

Small Craft Advisory from 6 PM this evening to 6 PM HST Wednesday for Maalaea Bay-Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.

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

Small Craft Advisory until 6 PM HST Wednesday 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 . TS MARINE . Almanza


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 21 mi137 min E 5.1 G 9.9 74°F 77°F1021.9 hPa
51206 22 mi142 min 76°F11 ft

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, HI21 mi72 minNNE 58.00 miLight Rain73°F64°F74%1022.1 hPa

Link to 5 minute data for PHTO

Wind History from HTO (wind in knots)
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Last 24hrNE12NE12E8E8E10NE8E9E9
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1 day ago--NE7NE11NW7W8N5NE16NE10NE10
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Tide / Current Tables for Hilo, Hawaii Island, Hawaii
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Hilo
Click for Map
Tue -- 05:04 AM HST     1.97 feet High Tide
Tue -- 06:38 AM HST     Sunrise
Tue -- 09:18 AM HST     Moonset
Tue -- 11:37 AM HST     -0.01 feet Low Tide
Tue -- 06:12 PM HST     2.04 feet High Tide
Tue -- 06:25 PM HST     Sunset
Tue -- 10:14 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.71.11.51.821.91.61.20.70.3000.20.61.11.51.9221.71.410.7

Tide / Current Tables for Hilo, Hilo Bay, Hawaii
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Hilo
Click for Map
Tue -- 05:09 AM HST     2.27 feet High Tide
Tue -- 06:38 AM HST     Sunrise
Tue -- 09:18 AM HST     Moonset
Tue -- 11:35 AM HST     -0.11 feet Low Tide
Tue -- 06:00 PM HST     2.10 feet High Tide
Tue -- 06:25 PM HST     Sunset
Tue -- 10:14 PM HST     Moonrise
Tue -- 11:54 PM HST     0.51 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.71.21.72.12.32.21.81.30.70.2-0.1-0.10.20.61.11.622.121.71.30.90.6

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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