Friday, July10, 2020
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Marine Weather and Tides
Nanawale Estates, 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 5:46AMSunset 7:04PM Thursday July 9, 2020 8:24 PM HST (06:24 UTC) Moonrise 10:48PMMoonset 9:56AM Illumination 77% 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- 335 Pm Hst Thu Jul 9 2020
Tonight..East winds 20 knots. Wind waves 6 feet. Scattered showers.
Friday..East winds 20 knots. Wind waves 6 feet. Scattered showers.
Friday night..East winds 20 knots. Wind waves 6 feet. Scattered showers in the evening, then isolated showers after midnight.
Saturday..East winds 20 knots. Wind waves 5 feet. Isolated showers.
Saturday night..East winds 15 knots. Wind waves 5 feet. Isolated showers in the evening, then scattered showers after midnight.
Sunday..East winds 20 knots. Wind waves 5 feet. Scattered showers.
Sunday night..East winds 15 knots. Wind waves 5 feet. Scattered showers.
Monday..East winds 15 knots. Wind waves 4 to 5 feet. Scattered showers.
Tuesday..East winds 15 knots. Wind waves 6 feet. SWell southeast 3 feet. Scattered showers.
PHZ100 335 Pm Hst Thu Jul 9 2020
Synopsis for hawaiian coastal waters.. High pressure far north of the islands will maintain fresh to strong trade winds into early next week. Winds may slightly decrease around Tuesday of next week as a weak disturbance passes north of the state.


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 100145 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 345 PM HST Thu Jul 9 2020

SYNOPSIS. The breezy trade wind pattern will continue through early next week. Wetter than normal trade wind weather will continue through early Friday as a weak disturbance and higher moisture move through from east to west acoss the state. Drier trade wind conditions will prevail Friday and Saturday, trending slightly wetter Sunday into next week.

DISCUSSION. A 1029 mb surface high is centered 1300 miles to the north driving fresh trade winds across the state this afternoon. A weak surface and midlevel trough north and west of the area (respectively) is currently dragging a broad band of moisture onto the islands since Wednesday afternoon. 00Z soundings show precipitable water (PW) values near normal for July at around 1.4 inches. MIMIC satellite Total PW shows a boost to 1.6 moving onto the Big Island at this hour. Soundings also show a midlevel inversion present at around 9 to 10 kft. Radar and visible satellite show broken low cloud cover and scattered showers focused over the windward slopes. Rainfall amounts have been light, with locally moderate accumulations in terrain enhanced areas.

Clouds and showers will fill in a bit more tonight as the higher PW sweeps east to west in combination with the diurnal shower maximum (at night). Showers will continue to focus windward. Some showers will periodically make their way to leeward sides of the smaller islands. Overall, the next 12 to 18 hours should be a wetter-than-normal trade wind weather pattern for summer.

A large area of stable stratocumulus clouds will move in through the day Friday, resulting in decreasing showers that will continue into Saturday. An upper low will set up to the northeast and may trend the the trade showers up slightly Sunday through Tuesday. Wind speeds will maintain the current strength into the middle of next week.

Although confidence remains very low being this far out in time, model solutions are trending toward a wet middle-to latter-half of next week as a remnant trough associated with Tropical Storm Cristina in the far eastern Pacific approaches and moves into the area. Additional fine tuning of the forecast will be expected over the coming days as forecast confidence rises and guidance converges on a solution.

AVIATION. VFR conditions prevail at all TAF sites with brief MVFR conditions occurring at phto and phny in low clouds. There may be brief periods of MVFR conditions over windward slopes and summits of all islands through the evening and on through the overnight hours as moisture embedded in the trades interacts with island terrain. There may also be some local MVFR conditions over the leeward Big Island slopes through the evening hours due to afternoon cloud buildups.

Airmet TANGO is currently posted over and downwind of mountainous terrain of Maui County and the Big Island. This will likely be cancelled later today with an expected drop off in trade wind speeds.

MARINE. High pressure far north and northeast of the state will maintain fresh to strong trade winds into early next week. Some minor fluctuations are expected with trades slightly increasing Friday and Saturday. A Small Craft Advisory (SCA) remains in effect for the typically windier waters around Maui and the Big Island through Sunday. This SCA will likely need to be extended into Monday. Latest model guidance is suggesting a brief decrease of winds on Tuesday of next week as a weak disturbance passes north of the state. Winds could briefly drop below SCA thresholds next Tuesday.

No significant swells are due through much of next week. A mix of background south and southeast swells will continue to produce small surf along south facing shores through next week. A small south-southwest filled in during the day today and will likely hold through Friday morning and taper off in the afternoon. Trade wind swell will gradually build through Friday, then hold into early next week. Additionally, a small long-period swell from tropical cyclone Cristina could arrive early next week. Surf along north facing shores will remain nearly flat through next week.


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



DISCUSSION . Foster AVIATION . Burke MARINE . Kino


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 21 mi55 min Calm G 1.9 78°F 80°F1015.6 hPa
51206 22 mi42 min 79°F7 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 mi32 minN 06.00 miRain76°F69°F79%1017.1 hPa

Link to 5 minute data for PHTO

Wind History from HTO (wind in knots)
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Last 24hrW7W3CalmSW5S6W7SW5SW5SW4CalmCalmNW6NW3W6SW8NW635E9E8E7E5E3Calm
1 day agoW8SW7SW4SW3SW4SW4W5SW5SW4W3SW3SW4W6W3E9E12E10
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2 days agoCalm3SW3SW6W4SW3SW5SW4SW5W33SW6SW4N76NE7NE11
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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 Honuapo, Hawaii Island, Hawaii
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Honuapo
Click for Map
Fri -- 02:34 AM HST     0.27 feet Low Tide
Fri -- 05:51 AM HST     Sunrise
Fri -- 08:17 AM HST     1.34 feet High Tide
Fri -- 10:49 AM HST     Moonset
Fri -- 12:48 PM HST     0.67 feet Low Tide
Fri -- 07:03 PM HST     Sunset
Fri -- 07:34 PM HST     2.13 feet High Tide
Fri -- 11:25 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.50.30.30.40.711.21.31.31.10.90.70.70.811.31.61.92.12.121.71.3

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
Wind Forecast for (2,6,7,8)
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Ground Weather Radar Station South Shore, 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.