Monday, May27, 2019 L-36.com


Marine Weather and Tides
Kihei, HI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 5:43AMSunset 7:02PM Monday May 27, 2019 2:26 AM HST (12:26 UTC) Moonrise 1:33AMMoonset 1:24PM Illumination 39% Phase: Third Quarter Moon; Moon at 23 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- 917 Pm Hst Sun May 26 2019
Rest of tonight..North winds 20 knots. Wind waves 2 feet or less. SWell south 3 feet.
Monday..North winds 15 knots. Wind waves 2 feet or less. SWell south 3 feet. Isolated showers in the afternoon.
Monday night..Northeast winds 10 knots. Wind waves 2 feet or less. SWell south 3 feet.
Tuesday..Winds variable less than 10 knots. Wind waves 2 feet or less. Isolated showers in the afternoon.
Tuesday night..Northeast winds 10 knots. Wind waves 2 feet or less.
Wednesday..Northeast winds 10 knots in the morning becoming variable less than 10 knots. Wind waves 2 feet or less.
Wednesday night..North winds 20 knots. Wind waves 2 feet or less.
Thursday..North winds 20 knots. Wind waves 2 feet or less.
Friday..North winds to 25 knots. Wind waves 7 feet.
PHZ100 917 Pm Hst Sun May 26 2019
Synopsis for hawaiian coastal waters.. The ridge of high pressure will weaken north of the area through the first half of the week, then strengthen through the second half.


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 270602
afdhfo
area forecast discussion
national weather service honolulu hi
802 pm hst Sun may 26 2019

Synopsis
A strong high pressure system far northeast of the hawaiian
islands will interact with a stalled cold front northwest of
kauai. Trade winds will decrease over the next few days,
strengthening land and sea breezes over leeward slopes of each
island. Scattered afternoon showers will develop over mountain and
interior sections of each island with decreasing trends each
night. By Wednesday the high pressure ridge north of the island
grows stronger pushing the stalled front away from the state
allowing moderate trade winds to return to the region through next
weekend.

Discussion
This evening's satellite imagery shows a few high cirrus clouds
passing over the state with stable low clouds drifting in along
the easterly trade winds. Isolated to scattered showers remain in
the forecast this evening favoring windward and mountain areas.

Daily high temperature records have been broken for several
locations this week due to this warm and stable weather pattern.

Across the east pacific basin we see a high pressure center far
to the northeast of the hawaiian islands with a ridge from this
system just north of the islands producing moderate trade winds.

A stalled cold front lingers a few hundred miles northwest of
kauai keeping our islands along the edge of the high pressure
ridge. The high center will drift slowly to the east over the
next few days. A subtle weakening in the ridge north of the
islands will decrease the trade winds from memorial day into
Tuesday. The trade winds will also veer towards the east-southeast
direction.

Memorial day through Tuesday... Decreasing large scale trade winds
will allow local scale land and sea breezes to grow stronger.

Expect sea breezes to form during the day-light hours along
leeward slopes of each island. Clouds and scattered showers will
form over each island favoring mountain ranges, interior sections,
and sea breeze to background wind convergence zones. Model cross
sections are showing cloud depths up to 10,000 feet during this
period with precipitable water amounts over the islands increasing
through Tuesday. This means shower activity should trend higher
from Monday night into Tuesday.

Wednesday through Sunday... The high pressure ridge will push the
stalled front northward away from the islands on Wednesday allowing
pressure gradients over the state to increase into next weekend.

Expect a return to moderate easterly trade winds through next
Sunday with clouds and showers favoring typical windward and mauka
areas.

Aviation
High pressure northeast of the state will keep a light to moderate
trade wind flow in place tonight, with clouds and showers favoring
windward and mauka areas. The trades will ease on memorial day,
with sea breezes developing in many leeward areas. Showers will
favor windward and mauka areas during the morning hours, with
showers then transitioning to leeward and interior areas during
the afternoon.

No airmets are in effect at this time.

Marine
Moderate to fresh easterly trades associated with a ridge north
of the islands will trend down into the light to moderate
category through the first half of the week. Localized land and
sea breeze conditions near the coasts will become a possibility as
the winds drop off. A return of fresh to strong trades is
forecast through the second half of the week as the ridge
strengthens.

Surf along south facing shores has been building all day today
due to a long-period south swell that has filled in. Local
observations from the lifeguards depicted advisory-level surf at
some locations today. This combined with observations at the
offshore buoys a couple of hundred nautical miles to the south
reflecting similar energy on the way has resulted in an evening
update to include a high surf advisory for south facing shores of
all islands through Monday afternoon.

As the current south swell eases late Monday into Tuesday, a new
long-period south swell (slightly smaller) will fill in Tuesday
and hold through midweek. This overlapping trend will continue
into the second half of the week another small south swell moves
through Thursday through Friday.

The late season small northwest swell that filled in over the
weekend will gradually lower through Tuesday. A similar northwest
swell (slightly smaller) will become a possibility by Thursday in
response to a decent sized pocket of strong breezes focused at
the islands this evening around 1500 nautical miles to the
northwest.

Surf along east facing shores will quickly lower through the
first half of the week as the trades back off. An upward trend
will be likely through the second half of the week as fresh to
strong trades return.

Hfo watches warnings advisories
High surf advisory until 6 pm hst Monday for south facing shores
of all islands.

Discussion... Bohlin
aviation... Jelsema
marine... Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 10 mi44 min SE 1 G 1.9 73°F 1016.2 hPa
51205 19 mi56 min 78°F5 ft
51213 29 mi56 min 80°F4 ft
51202 - Mokapu Point, HI (098) 80 mi56 min 78°F6 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 mi32 minSE 710.00 miFair70°F62°F76%1016.7 hPa

Wind History from HOG (wind in knots)
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Last 24hrCalm4CalmNE9E8
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NE19NE21NE20NE17NE17NE16NE14NE14NE12E5E3E4CalmSE4SE7
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2 days agoSE5E33E5S6NW3NW94NE13
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Tide / Current Tables for Kihei, Maui (Hawaii) (2)
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Kihei
Click for Map
Mon -- 01:32 AM HST     Moonrise
Mon -- 05:37 AM HST     -0.01 feet Low Tide
Mon -- 05:45 AM HST     Sunrise
Mon -- 12:33 PM HST     1.23 feet High Tide
Mon -- 01:24 PM HST     Moonset
Mon -- 05:02 PM HST     0.55 feet Low Tide
Mon -- 07:01 PM HST     Sunset
Mon -- 11:24 PM HST     1.58 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.30.90.50.2000.10.30.60.91.11.21.21.10.80.60.60.60.811.21.41.6

Tide / Current Tables for Makena, Maui Island, Hawaii
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Makena
Click for Map
Mon -- 01:32 AM HST     Moonrise
Mon -- 05:27 AM HST     -0.01 feet Low Tide
Mon -- 05:45 AM HST     Sunrise
Mon -- 12:02 PM HST     0.83 feet High Tide
Mon -- 01:24 PM HST     Moonset
Mon -- 04:52 PM HST     0.55 feet Low Tide
Mon -- 07:00 PM HST     Sunset
Mon -- 10:53 PM HST     1.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.90.60.30.1000.10.30.50.70.80.80.80.70.60.60.60.60.70.911.11.2

Weather Map and Satellite Images
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wmap_P
GOES 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.
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Wind Forecast for (8,2,3,4)
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Ground Weather Radar Station Kohala, 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 numerious 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.