Sunday, January24, 2021
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Marine Weather and Tides
Naalehu, 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.

Sunrise 6:55AMSunset 6:09PM Sunday January 24, 2021 2:25 PM HST (00:25 UTC) Moonrise 2:50PMMoonset 3:33AM Illumination 88% Phase: Waxing Gibbous; Moon at 12 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- 915 Am Hst Sun Jan 24 2021
.small craft advisory in effect through Wednesday afternoon...
Today..East winds to 25 knots. Wind waves 8 feet. Northwest swell 6 feet. Scattered showers in the morning, then frequent showers in the afternoon.
Tonight..East winds to 25 knots. Wind waves 8 feet. Northwest swell 5 feet. Frequent showers.
Monday..East winds to 25 knots. Wind waves 9 feet. Northwest swell 4 feet. Frequent showers.
Monday night..East winds to 25 knots. Wind waves 9 feet. Northwest swell 3 feet. Frequent showers.
Tuesday..East winds to 25 knots. Wind waves 9 feet. Numerous showers.
Tuesday night..East winds to 25 knots. Wind waves 9 feet. Numerous showers.
Wednesday..East winds to 25 knots. Wind waves 9 to 10 feet. Numerous showers.
Thursday..East winds to 25 knots. Wind waves 11 feet. West swell 3 feet. Scattered showers.
PHZ100 915 Am Hst Sun Jan 24 2021
Synopsis for hawaiian coastal waters.. Strong high pressure will remain northeast of the state through the week.


7 Day Forecast for Marine Location Near Naalehu, HI
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location: 19.08, -155.55     debug


Area Discussion for -
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FXHW60 PHFO 242010 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 1010 AM HST Sun Jan 24 2021

SYNOPSIS. Strong high pressure northeast of the area will maintain locally strong trade winds over the islands through much of the coming week. Windward areas will remain rather rainy. Rainfall will begin to increase over the Big Island tonight and become more wide spread by Monday afternoon and continue through Tuesday. Drier trades are expected by the second half of the week.

DISCUSSION. A strong high far north of the area is producing strong easterly trade winds over the state today. Latest radar and satellite imagery are showing light to moderate showers riding in with the strong trades. Most of these showers are focused over windward and mountain areas.

Starting tonight, a trough west of the state will slowly move closer and then lift north of the state. This will cause the winds to shift toward the southeast. This will bring an increase of moisture across the state with the greatest moisture expected over the Big Island. A Flash Flood Watch has been issued for the Big Island starting tonight and continuing through Tuesday. During this time, east and southeast slopes of the Big Island is expected to see a prolonged period of moderate to locally heavy rainfall.

For rest of the state, we should see moisture spread westward by Monday afternoon. Due to the low level flow mainly being out of the southeast, there will be some rain shadowing from the Big Island and areas across Maui County and Oahu should see less showers compared to the Big Island.

By the second half of the week, models are showing the moisture shifting west of the state and we should see our typical trade wind weather return. Trade winds will be on the strong side thou, with 15 to 30 mph trades expected through most of this week.

AVIATION. High pressure north northeast of the state will bring breezy east southeast flow to the islands today. Deeper moisture lifting towards the area will act to increase cloud cover and showers as the day progresses, especially along windward portions of the Big Island and Kauai. MVRF conditions for ceilings and visibility will likely accompany this activity. Scattered showers elsewhere along windward portions of all other islands.

AIRMET SIERRA remains in effect for Oahu for mountain obscuration above 2500 feet due to reduced visibility from clouds and showers.

AIRMET TANGO remains in effect over and immediately southwest of mountains on all islands due to tempo moderate turbulence.

MARINE. Strong east-southeast winds associated with high pressure to the NE and low pressure to the W will continue through the upcoming week. A Small Craft Advisory is in place across the coastal waters for winds and seas. Surf along east facing shores will remain elevated through midweek and a High Surf Advisory is in place.

Surf along north and west facing shores will steadily lower through Monday as a NW swell eases. Heights will dip below advisory levels by tonight. A large scale weather change across the Pacific will translate to smaller surf for north and west facing shores Monday through Thursday. For the long range, wave models show small, long period energy arriving in Hawaii through the day Thursday out of the WNW, then trending up out of the NW Friday and Friday night. However, large errors typically associated with these sources lead to low forecast confidence.

Surf along south facing shores may trend up Tuesday/Wednesday as an out-of-season SSW swell arrives. The PacIOOS buoy at Samoa observed this source in the long period range, increasing confidence locally.

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Advisory until 6 PM HST this evening for Niihau-Kauai Leeward-Waianae Coast-Oahu North Shore-Molokai Leeward-Maui Central Valley-Kona.

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

Flash Flood Watch from 6 PM HST this evening through Tuesday afternoon for Big Island.

Winter Storm Watch from 6 PM HST this evening through Tuesday afternoon for Big Island Summits.

Small Craft Advisory until 6 PM HST Wednesday for all Hawaiian waters-



DISCUSSION . Kino AVIATION . Thomas MARINE . Morrison


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 52 mi56 min W 2.9 G 5.1 73°F 79°F1015 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 mi33 minWSW 910.00 miMostly Cloudy82°F67°F60%1012.8 hPa

Link to 5 minute data for PHKO

Wind History from HKO (wind in knots)
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Last 24hrSW8SW7SW5SW5SW4W3E4SE4SE4SE5E5E7E8SE4E5E3E5E4E3S7S8SW9SW9SW9
1 day agoS10W7S8S8SE5SE6SE6SE5E7E5E5E6E7SE7SE6E6E4E3SE4W3W5SW7SW7SW7
2 days agoSE6SE10SE7SE5NE3SE3SE3E5E6E7W3N3SE5SE6NE5E3E5N3NE3W5SW7SW9S11S11

Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
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Honuapo
Click for Map
Sun -- 01:29 AM HST     2.46 feet High Tide
Sun -- 03:32 AM HST     Moonset
Sun -- 06:57 AM HST     Sunrise
Sun -- 09:12 AM HST     0.55 feet Low Tide
Sun -- 12:43 PM HST     1.13 feet High Tide
Sun -- 02:49 PM HST     Moonrise
Sun -- 06:10 PM HST     Sunset
Sun -- 06:29 PM HST     0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.22.42.42.31.91.51.20.80.60.50.60.91.11.110.80.60.30.10.10.30.71.11.7

Tide / Current Tables for Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii
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Napoopoo
Click for Map
Sun -- 01:39 AM HST     2.06 feet High Tide
Sun -- 03:35 AM HST     Moonset
Sun -- 07:00 AM HST     Sunrise
Sun -- 09:16 AM HST     0.45 feet Low Tide
Sun -- 12:53 PM HST     0.73 feet High Tide
Sun -- 02:50 PM HST     Moonrise
Sun -- 06:11 PM HST     Sunset
Sun -- 06:33 PM HST     0.01 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.822.11.91.71.310.70.50.40.50.60.70.70.70.50.40.2000.20.50.91.3

Weather Map
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wmap_P
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
Ground Weather Radar Station




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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.