Sunday, July5, 2020
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Marine Weather and Tides
Hilo, HI

Version 3.4
NOTICE
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 5:45AMSunset 7:04PM Sunday July 5, 2020 4:33 PM HST (02:33 UTC) Moonrise 7:59PMMoonset 6:15AM Illumination 100% Phase: Full Moon; Moon at 15 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- 338 Pm Hst Sun Jul 5 2020
Tonight..East winds 15 knots. Wind waves 4 feet. SWell southeast 3 feet. Isolated showers.
Monday..East winds 15 knots. Wind waves 3 feet. SWell southeast 3 feet. Isolated showers.
Monday night..East winds 15 knots. Wind waves 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Tuesday..East winds 15 knots. Wind waves 4 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Tuesday night..East winds 15 knots. Wind waves 4 feet. Isolated showers in the evening, then scattered showers after midnight.
Wednesday..East winds 15 knots. Wind waves 5 feet. SWell southeast 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Wednesday night..East winds 15 knots. Wind waves 5 feet. SWell southeast 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Thursday..East winds 20 knots. Wind waves 6 feet. SWell southeast 3 feet. Scattered showers.
Friday..East winds 20 knots. Wind waves 6 feet. SWell southeast 3 feet. Scattered showers.
PHZ100 338 Pm Hst Sun Jul 5 2020
Synopsis for hawaiian coastal waters.. Surface trough west of kauai will continue westward and away from the area through Monday. High pressure will build to the north through the week.


7 Day Forecast for Marine Location Near Hilo, HI
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location: 19.72, -155.08     debug


Area Discussion for -
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FXHW60 PHFO 060117 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 317 PM HST Sun Jul 5 2020

SYNOPSIS. Light to moderate easterly trade winds will produce showers over windward slopes tonight, while a few showers linger over leeward areas during the evening. Trade winds will gradually increase on Monday and become locally breezy Tuesday into next weekend. The stronger trades will promote a typical summertime weather pattern, focusing rainfall along windward slopes and producing afternoon showers over leeward Big Island.

DISCUSSION. Light to moderate trade winds have been overpowered by sea breezes across most leeward areas this afternoon. The islands lie between an area of moisture that moved through yesterday and a weak band of moisture passing just north. As a result, windward rainfall has been modest today. Sea breezes have triggered a few showers over sheltered leeward slopes from Kauai to to Maui, and as is typical in the summer, more extensive and briefly heavy shower activity has flared over leeward Big Island.

Easterly trade winds will remain somewhat suppressed tonight and will begin a gradual increase Monday afternoon. The incoming band of moisture will produce showers along mainly windward slopes tonight, possibly into early Monday morning on Kauai. Leeward shower activity will decrease during the evening as lingering convection dissipates and gives way to land breezes. Aside from trailing moisture over Kauai, showers should be less active on Monday as a drier and more stable airmass moves in from the east.

Trade winds will become locally breezy by Tuesday as high pressure builds far north of the state. A typical summertime weather pattern is expected into next weekend. Rainfall will be largely focused over windward slopes, while afternoon showers develop each afternoon over leeward Big Island. A ridge aloft will maintain stable conditions.

AVIATION. VFR conditions prevail at most TAF sites this afternoon. Periods of MVFR conditions are expected through the evening hours for portions of the leeward Big Island slopes where locally heavy showers are occurring. There may be some brief MVFR conditions through the overnight hours over windward slopes of all islands.

MARINE. Light to moderate east-southeast winds will hold tonight as a weak trough west of Kauai continues westward away from the state. A return of a more typical trade wind pattern is anticipated Monday with winds reaching the moderate to fresh range. Winds should ramp up to fresh to strong by Tuesday, likely requiring a Small Craft Advisory for the typical windier waters around Maui County and the Big Island. The advisory may need to be expanded to additional marine areas as the trades continue to increase though the week. Seas will also approach advisory level (10 ft) over the Alenuihaha Channel and waters south of the Big Island by the end of the week.

Surf along south facing shores will remain small through the week, with mainly a mix of small south and south-southeast energy. For the extended, guidance depicts a a solid area of gales setting up in the Tasman Sea through the first half of the week, which could result in an uptick in surf locally by mid-month.

Surf along east facing shores will remain small through Tuesday, then gradually trend up through the rest of the week as the trades increase locally and upstream of the islands across the eastern Pacific. Surf along north facing shores will remain small through the upcoming week.

HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . Wroe AVIATION . Burke MARINE . TS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 1 mi45 min NE 8 G 11 79°F 80°F1014.1 hPa
51206 7 mi50 min 80°F5 ft
KWHH1 45 mi45 min SSW 8.9 G 11 81°F 82°F1014 hPa

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI1 mi40 minE 810.00 miOvercast82°F68°F63%1015.4 hPa

Link to 5 minute data for PHTO

Wind History from HTO (wind in knots)
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Last 24hrE8E8SE10CalmS3S3S8SW5W4W4W3SW3S4SW7W5SW3SE7SE10SE9SE11E8E10E8E8
1 day agoSE13SE10E9SE5S3SE3SE6S3CalmSW5SW7W7SW4W7SW6W4CalmCalm5E9E11E9E11E12
2 days agoNE8E7NE6CalmE5W6W5SW5CalmW5SW4NE4SW4SW5SW7CalmSE6SE55SE8E10E9E11SE11

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Kawaihae, Big Island, Hawaii
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Kawaihae
Click for Map
Sun -- 04:01 AM HST     0.78 feet High Tide
Sun -- 05:49 AM HST     Sunrise
Sun -- 06:17 AM HST     Moonset
Sun -- 09:20 AM HST     -0.19 feet Low Tide
Sun -- 04:46 PM HST     2.70 feet High Tide
Sun -- 07:07 PM HST     Sunset
Sun -- 08:02 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.30.50.70.80.70.50.2-0-0.2-0.10.10.61.11.82.32.62.72.52.11.510.50.2

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
Wind Forecast for (22,6,7,8)
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Ground Weather Radar Station Kohala, HI
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weather_mapweather_map weather_map

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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.