Tuesday, May11, 2021
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Marine Weather and Tides
Discovery Harbour, 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 5:44AMSunset 6:48PM Tuesday May 11, 2021 1:24 AM HST (11:24 UTC) Moonrise 5:53AMMoonset 7:04PM Illumination 0% Phase: New Moon; Moon at 29 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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PHZ124 Big Island Southeast Waters- 934 Pm Hst Mon May 10 2021
.small craft advisory in effect through Tuesday afternoon...
Rest of tonight..Northeast winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet. Scattered showers.
Tuesday..Northeast winds 20 knots. Wind waves 6 feet. Isolated showers.
Tuesday night..Northeast winds 20 knots. Wind waves 6 feet. Scattered showers.
Wednesday..Northeast winds 20 knots. Wind waves 6 feet. Isolated showers.
Wednesday night..East winds to 25 knots. Wind waves 7 feet. Scattered showers.
Thursday..East winds to 25 knots. Wind waves 7 feet. Isolated showers.
Thursday night..Northeast winds to 25 knots. Wind waves 7 feet. SWell south 3 feet. Scattered showers.
Friday..Northeast winds to 25 knots. Wind waves 7 to 8 feet. SWell south 3 feet. Isolated showers.
Saturday..Northeast winds to 25 knots. Wind waves 8 feet. Isolated showers.
PHZ100 934 Pm Hst Mon May 10 2021
Synopsis for hawaiian coastal waters.. Ridge will remain north of the area through the upcoming weekend.


7 Day Forecast for Marine Location Near Discovery Harbour, HI
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location: 19.05, -155.63     debug


Area Discussion for -
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FXHW60 PHFO 110633 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 833 PM HST Mon May 10 2021

SYNOPSIS. A broad high pressure ridge north of the island chain will keep moderate to locally breezy trade winds in the forecast into the weekend. Passing showers will favor windward and mountain areas with lower chances for showers possible over leeward locations.

DISCUSSION. A broad high pressure ridge north of the state will produce moderate to locally breezy trade winds across the region through the weekend. Cooler temperatures aloft northeast of the islands will keep passing showers in the forecast for mostly windward and mountain areas. Shower activity will trend higher in the overnight to early morning hours and trend lower in the daylight hours.

Long range guidance this weekend continues to show an unstable upper level low dropping into the region from the north. The latest model solutions show the cut off low centered just northeast of the island chain. This system may increase rainfall coverage from this weekend into early next week. Rainfall impacts will depend upon how close this unstable low tracks relative to each island, the closer it gets the higher the rainfall totals. Confidence on a wetter solution remains low this far out, as much can change with the location of this system over the next five days.

AVIATION. Moderate to locally breezy trades will focus clouds and showers over windward areas through the period. Periods of MVFR will be possible overnight as an area of increased moisture embedded in the trades approaches from the east. This will particularly be the case over Windward Big Island where AIRMET Sierra for mountain obscuration is scheduled to take effect at 06z/10pm HST.

MARINE. Fresh to strong easterly trades will continue into the second half of the week as high pressure remains anchored to the north. Winds could back slightly to a more northeast direction later in the week as a broad trough develops far northeast of the area. The Small Craft Advisory currently in place for the typically windier waters between Maui County and the Big Island through Tuesday will likely need to be extended in a later package. Seas will remain rough in these windier areas, but should hold below the 10 ft advisory threshold through the week.

Surf along south facing shores will remain steady each day through the week as small, overlapping, long-period swells from the southern Pacific roll through. The next in the series should arrive by Wednesday, then again late in the week going into the weekend.

Surf along east facing shores will remain rough and choppy due to the onshore trades. Surf should hold in the small category each day due to a limited fetch upstream.

Surf along north facing shores will trend down Tuesday into midweek to near flat levels as the current northwest swell moves out. Expect the summer-like conditions to hold through the weekend.

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



DISCUSSION . Bohlin AVIATION . JVC MARINE . Gibbs


Weather Reporting Stations
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On 03/09/2021 the NDBC primary processing servers were shut off due to a facilities issue. Station pages on the NDBC website are not updating and there is no ETR at this time. We will update this banner as we learn more.
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 56 mi54 min Calm G 1.9 71°F 78°F1016.6 hPa

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI46 mi31 minN 010.00 miMostly Cloudy76°F67°F74%1015.5 hPa

Link to 5 minute data for PHKO

Wind History from HKO (wind in knots)
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Last 24hrS6SE7S7SE4SE6CalmSE6S6SW10W8SW6SW9SW9SW9SW8SW10W6W7NE15NW9W12W5CalmCalm
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Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
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Honuapo
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Tue -- 02:58 AM HST     1.27 feet High Tide
Tue -- 05:48 AM HST     Sunrise
Tue -- 05:52 AM HST     Moonrise
Tue -- 08:54 AM HST     -0.09 feet Low Tide
Tue -- 09:01 AM HST     New Moon
Tue -- 03:57 PM HST     2.36 feet High Tide
Tue -- 06:48 PM HST     Sunset
Tue -- 07:04 PM HST     Moonset
Tue -- 11:05 PM HST     0.28 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.91.21.31.20.90.60.3-0-0.100.40.91.41.92.22.42.21.91.510.60.40.3

Tide / Current Tables for Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii
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Napoopoo
Click for Map
Tue -- 03:08 AM HST     0.87 feet High Tide
Tue -- 05:49 AM HST     Sunrise
Tue -- 05:53 AM HST     Moonrise
Tue -- 08:58 AM HST     -0.19 feet Low Tide
Tue -- 09:01 AM HST     New Moon
Tue -- 04:07 PM HST     1.96 feet High Tide
Tue -- 06:50 PM HST     Sunset
Tue -- 07:06 PM HST     Moonset
Tue -- 11:09 PM HST     0.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.60.80.90.80.60.40.1-0.1-0.2-0.10.20.61.11.51.821.91.61.30.90.50.30.2

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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