Saturday, July4, 2020
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Marine Weather and Tides
Paia, 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 5:48AMSunset 7:12PM Friday July 3, 2020 8:16 PM HST (06:16 UTC) Moonrise 6:12PMMoonset 4:24AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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- 322 Pm Hst Fri Jul 3 2020
Tonight..Winds variable less than 10 knots. Wind waves 2 feet or less. Isolated showers through the night.
Saturday..Winds variable less than 10 knots. Wind waves 2 feet or less. Isolated showers.
Saturday night..Winds variable less than 10 knots. Wind waves 2 feet or less. Isolated showers through the night.
Sunday..Winds variable less than 10 knots becoming northeast 20 knots in the afternoon. Wind waves 2 feet or less.
Sunday night..Northeast winds 20 knots. Wind waves 2 feet or less.
Monday..Northeast winds to 25 knots. Wind waves 2 feet or less.
Monday night..Northeast winds to 25 knots. Wind waves 2 feet or less.
Tuesday..North winds to 25 knots. Wind waves 3 feet.
Wednesday..North winds to 25 knots. Wind waves 6 feet.
PHZ100 322 Pm Hst Fri Jul 3 2020
Synopsis for hawaiian coastal waters.. A weak surface trough passing through the area will bring light to moderate trades through Sunday. High pressure will strengthen early next week, and accelerate trade winds into the moderate to breezy range.


7 Day Forecast for Marine Location Near Paia, HI
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location: 20.9, -156.36     debug


Area Discussion for -
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FXHW60 PHFO 040136 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 336 PM HST Fri Jul 3 2020

SYNOPSIS. Light to moderate trade winds will prevail through the holiday weekend, then strengthen early next week. An area of increased moisture is expected to impact the islands through Saturday. Expect warm and muggy conditions, and an uptick in showers. The boost in the trades early next week, will bring with it a drier and more stable air mass.

DISCUSSION. Have made some tweaks to the first 36 hours of the forecast. Have modified dewpoints, nudging more to the higher resolution ARW model which was better capturing the upper 60s/lower 70s dewpoints that we have seen in observations today. Also made some tweaks to the PoP and associated fields. The biggest change was to lower values over the leeward sides of the smaller islands. At the same time, some areas across the state saw a boost in the their forecast QPF.

The general forecast philosophy remains the same this afternoon. The weak trough to the east of the islands has washed out and was not analyzed with the morning analysis. The showery cloud area to the east of the islands has started to fall apart, but satellite derived precipitable water (PW) continues to show a sizable area of 1.4+ inches over the central islands and upstream of the Big Island. Anticipate another uptick in showers overnight and continuing tomorrow.

As mentioned above, dewpoints have reached into the low 70s in a few locations. Elevated dewpoints are expected to continue through tomorrow before dropping back gradually with the new week. With the lighter winds and elevated dewpoints, expect muggy conditions to continue.

While light to moderate trades continue, some areas have seen winds weaken enough to allow for localized land and sea breezes. Expect winds to strengthen as we head into Sunday. As the trades build back in, we can expect a return to more typical trade wind showers.

AVIATION. No AIRMETs are currently in effect.

A high far north of the area will maintain gentle to moderate low-level easterly flow through the weekend. The low-level easterly flow will be light enough to allow local afternoon sea breezes and nighttime land breezes. VFR conditions will prevail, but sea breezes will produce isolated MVFR conditions over west and interior sections of the islands, mainly during the afternoon and evening hours. The low-level flow will carry some clouds over east sections of the islands and produce isolated MVFR ceilings and visibilities. These conditions will be most prevalent during the night and early morning hours.

MARINE. The remains of a weak surface trough passing through the area will bring light to moderate trades through Sunday. High pressure will strengthen early next week, and accelerate trade winds into the moderate to breezy range. Small Craft Advisory conditions for the typically windy areas around Maui County and the Big Island are expected to return by Tuesday.

A current small SSW swell will gradually decline into Saturday. Otherwise, a mix of small background swells from the SSE and SSW are expected through next week. Surf is expected to stay below advisory levels.

Surf along east facing shores will decrease through the weekend as the trades weaken. Surf along north facing shores will remain nearly flat with mainly background trade wind swell.

HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . M Ballard AVIATION . Donaldson MARINE . Morrison


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 6 mi47 min E 12 G 18 78°F 81°F1013.7 hPa
51205 9 mi51 min 80°F5 ft
51213 36 mi51 min 80°F3 ft
51202 - Mokapu Point, HI (098) 78 mi51 min 80°F5 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI4 mi23 minE 910.00 miPartly Cloudy81°F66°F61%1014.4 hPa
Lahaina - West Maui, HI17 mi2.5 hrsNE 7 G 1415.00 miPartly Cloudy79°F66°F65%1013.9 hPa

Link to 5 minute data for PHOG

Wind History from HOG (wind in knots)
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Last 24hrNE12NE6NE6----N7NE4E5NE6NE6N6N9N11N12N15
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1 day ago------------N6NE7NE7NE9E14
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2 days agoNE12NE15NE11NE11N9NE9NE8NE13NE14NE7NE13NE13
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NE14NE12

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Kahului
Click for Map
Sat -- 12:48 AM HST     1.31 feet High Tide
Sat -- 05:20 AM HST     Moonset
Sat -- 05:49 AM HST     Sunrise
Sat -- 07:22 AM HST     -0.53 feet Low Tide
Sat -- 02:57 PM HST     2.86 feet High Tide
Sat -- 06:44 PM HST     Full Moon
Sat -- 07:11 PM HST     Sunset
Sat -- 07:12 PM HST     Moonrise
Sat -- 09:38 PM HST     0.86 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.31.20.90.50.1-0.3-0.5-0.5-0.20.411.72.32.72.92.72.41.91.51.10.90.91

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii (2)
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Kahului
Click for Map
Sat -- 01:13 AM HST     1.00 feet High Tide
Sat -- 05:20 AM HST     Moonset
Sat -- 05:49 AM HST     Sunrise
Sat -- 06:51 AM HST     -0.04 feet Low Tide
Sat -- 02:18 PM HST     2.86 feet High Tide
Sat -- 06:44 PM HST     Full Moon
Sat -- 07:11 PM HST     Sunset
Sat -- 07:12 PM HST     Moonrise
Sat -- 09:57 PM HST     0.35 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.9110.80.50.20-00.10.511.62.22.62.82.82.52.11.61.10.70.40.30.5

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 Molokai, HI
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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.