Saturday, August8, 2020
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Marine Weather and Tides
Kihei, 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 6:01AMSunset 7:01PM Friday August 7, 2020 7:48 PM HST (05:48 UTC) Moonrise 10:01PMMoonset 9:33AM 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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PHZ119 Maalaea Bay- 343 Pm Hst Fri Aug 7 2020
.small craft advisory in effect through Sunday afternoon...
Tonight..North winds to 25 knots. Wind waves 3 feet.
Saturday..North winds to 25 knots. Wind waves 3 feet.
Saturday night..North winds to 25 knots. Wind waves 3 feet.
Sunday..North winds to 25 knots. Wind waves 3 feet.
Sunday night..North winds to 25 knots. Wind waves 3 feet.
Monday..North winds to 25 knots. Wind waves 3 feet.
Monday night..North winds to 25 knots. Wind waves 3 feet.
Tuesday..North winds 20 knots. Wind waves 3 feet.
Wednesday..North winds 15 knots. Wind waves 2 feet or less.
PHZ100 343 Pm Hst Fri Aug 7 2020
Synopsis for hawaiian coastal waters.. High pressure will remain far north-northeast of the islands through the forecast period. Winds will trend up slightly this weekend.


7 Day Forecast for Marine Location Near Kihei, HI
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location: 20.75, -156.45     debug


Area Discussion for -
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FXHW60 PHFO 080144 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 344 PM HST Fri Aug 7 2020

SYNOPSIS. A typical trade wind weather pattern can be expected through the weekend and on into the middle of next week thanks to high pressure far north of the area. Clouds and passing showers will tend to favor windward and mauka areas with just a few brief showers expected over select leeward locations.

DISCUSSION. Surface high pressure is centered far north of the area. This places the islands in a moderate to breezy trade wind environment. Moisture embedded in the trades is providing for some passing light showers over some windward and mauka areas with leeward areas being generally dry. There will likely be some increase in shower coverage later tonight and on into the morning hours as an area of moisture seen on satellite imagery upstream of the state moves in from the east.

The area of high pressure will remain to our north through the weekend and on into the middle of next week. Little day to day change in wind speeds or direction is expected. Satellite imagery shows plenty of moisture upstream of the islands. Even though the airmass will be more stable, this moisture will tend to interact with island terrain and continue to allow for passing showers over windward and mauka areas especially during the late night through mid morning hours with a possible second maximum during the late afternoon and early evening hours. Models indicate a drier airmass will be in place early next week but another mid level low may be in the island vicinity which could keep shower probabilities a bit elevated especially for windward and mauka areas.

AVIATION. Moderate trades predominantly out of the east have been relatively dry today suggesting AIRMET SIERRA will not be required in the near term. Improved moisture spreading back into the area during the latter half of the period will bring an increased likelihood of periodic showers and MVFR/mountain obscuration for windward areas.

AIRMET TANGO remains in effect over and immediately south thru west of mountains below 9000 feet for tempo moderate turbulence.

MARINE. Breezy trade winds will trend up this weekend as the high north- northeast of the area strengthens. The Small Craft Advisory (SCA) will expand to include Maui windward waters, the Kaiwi Channel, and Oahu leeward waters by 6am HST Saturday through Sunday afternoon. The current SCA in effect for the typically windier waters and the around Maui County and the Big Island has also been extended through Sunday afternoon. Winds are expected to back down again early next week.

South facing shore surf will return to background levels by tomorrow and stay below summer average into next week. Small short period southeast swell will continue, with the Big Island blocking some of that energy from reaching the smaller islands. Surf along east facing shores will build through the weekend as trade winds strengthen. Although, surf heights should remain below the advisory levels along east facing shores.

A small north-northwest swell will provide a bit of energy to the north facing shores, keeping surf just above flat tonight and Saturday.

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.

Small Craft Advisory from 6 AM Saturday to 6 PM HST Sunday for Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters.



DISCUSSION . Burke AVIATION . Powell/Clark MARINE . EATON


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 10 mi48 min ENE 17 G 24 78°F 81°F1016.1 hPa (+1.5)
51205 19 mi22 min 80°F6 ft
51213 29 mi52 min 83°F4 ft
51202 - Mokapu Point, HI (098) 80 mi22 min 81°F7 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI10 mi54 minENE 15 G 2410.00 miPartly Cloudy82°F70°F67%1016.2 hPa
Lahaina - West Maui, HI21 mi2.1 hrsENE 1415.00 miLight Drizzle79°F71°F79%1015.6 hPa

Link to 5 minute data for PHOG

Wind History from HOG (wind in knots)
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Last 24hrNE11NE10NE11NE8NE9NE6NE13NE9NE10NE12NE7NE11NE15NE17
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1 day agoNE16
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NE11NE9CalmNE5NE10NE5NE4NE9NE13NE14
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2 days agoNE13NE11NE13NE13NE14
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NE13NE16NE10NE9NE10NE17
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E16
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Tide / Current Tables for Kihei, Maui (Hawaii) (2)
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Kihei
Click for Map
Sat -- 01:09 AM HST     0.32 feet Low Tide
Sat -- 06:02 AM HST     Sunrise
Sat -- 07:35 AM HST     1.49 feet High Tide
Sat -- 10:21 AM HST     Moonset
Sat -- 12:28 PM HST     0.66 feet Low Tide
Sat -- 06:59 PM HST     Sunset
Sat -- 07:06 PM HST     1.85 feet High Tide
Sat -- 10:33 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.40.60.81.11.31.51.51.31.10.80.70.70.811.31.61.81.91.81.61.20.9

Tide / Current Tables for Makena, Maui Island, Hawaii
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Makena
Click for Map
Sat -- 12:59 AM HST     0.32 feet Low Tide
Sat -- 06:03 AM HST     Sunrise
Sat -- 07:04 AM HST     1.09 feet High Tide
Sat -- 10:21 AM HST     Moonset
Sat -- 12:18 PM HST     0.66 feet Low Tide
Sat -- 06:35 PM HST     1.45 feet High Tide
Sat -- 06:59 PM HST     Sunset
Sat -- 10:33 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.40.50.70.911.11.110.80.70.70.70.811.11.31.41.41.31.20.90.7

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 (1,6,7,8)
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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.