Friday, November16, 2018 L-36.com


Marine Weather and Tides
Hana, 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 6:35AMSunset 5:45PM Thursday November 15, 2018 11:41 PM HST (09:41 UTC) Moonrise 1:09PMMoonset 12:00AM Illumination 59% Phase: Waxing Gibbous; Moon at 8 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- 924 Pm Hst Thu Nov 15 2018
.small craft advisory in effect through Saturday afternoon...
Rest of tonight..Northeast winds to 25 knots. Wind waves 3 feet.
Friday..Northeast winds 20 knots. Wind waves 3 feet. Isolated showers.
Friday night..Northeast winds to 25 knots. Wind waves 3 feet.
Saturday..Northeast winds to 25 knots. Wind waves 4 feet. Isolated showers.
Saturday night..Northeast winds to 25 knots. Wind waves 4 feet. Isolated showers after midnight.
Sunday..Northeast winds to 25 knots. Wind waves 3 feet in the morning then 2 feet or less. Isolated showers.
Sunday night..North winds to 25 knots. Wind waves 2 feet or less.
Monday..North winds to 25 knots. Wind waves 3 feet.
Tuesday..Northeast winds to 25 knots. Wind waves 3 feet.
PHZ100 924 Pm Hst Thu Nov 15 2018
Synopsis for hawaiian coastal waters.. High pressure will build north of the area over the weekend in the wake of a front, then strengthen early next week.


7 Day Forecast for Marine Location Near Hana, HI
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location: 20.77, -155.98     debug


Area Discussion for -
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Fxhw60 phfo 160628
afdhfo
area forecast discussion
national weather service honolulu hi
828 pm hst Thu nov 15 2018

Synopsis
Surface high pressure building northwest of the area will cause
the trade winds to strengthen across the islands through early
next week. An upper-level trough passing near the state may cause
increasing instability and wetter conditions as moisture
associated with a weakening frontal band moves down across the
area through this weekend. The frontal band is expected to push
south of the big island Sunday night. The trailing end of another
front may move over the islands around the middle of next week.

Discussion
A weak north-northeast to south-southwest oriented surface trough
appears to be just north of the central hawaiian islands early
this evening. The leading edge of a band of broken to overcast low
clouds and numerous showers assoicated with a weakening frontal
boundary is located about 250 miles north-northwest of lihue. This
leading edge has been moving toward the south-southeast at about
10 mph during the past six hours. The surface trough and the front
continue to keep the pressure gradient relatively relaxed across
the region early this evening. This is producing light winds
across most areas for now. However, a 1026 mb surface high near
34n 168w, or nearly 1000 miles northwest of lihue, is moving
toward the east at about 15 mph. This feature is expected to
gradually cause the pressure gradient to tighten across the state
later tonight and Friday as it moves closer to the area.

Aloft, a middle tropospheric trough is evident near kauai, while
a broad upper tropospheric trough is digging down toward the
region from the northwest. Even though the trough aloft near kauai
is producing some instability, the mid-layers of the atmosphere
are quite dry. There are also high clouds streaming over the area
from the southwest ahead of the digging upper-level trough. This
continues to produce mostly cloudy skies the islands. However,
rainfall remains minimal across the state early this evening.

The forecast guidance continues to indicate the trades will become
locally breezy starting Friday as the surface high builds
eastward. At the same time, showers are forecast to increase over
windward sections. Note that even though the models indicate
unstable conditions will develop due to the troughing aloft, the
most recent forecast has removed any mention of thunderstorms and
heavy rainfall. We will be monitoring the situation overnight in
case there need to be updates to the short-term forecast.

As we head in to this weekend, the surface high will likely push
the weakening frontal band down toward the islands. Based on the
latest guidance, we expect the remnant band of low clouds and
showers will reach kauai late Friday night, and then oahu Saturday
morning. After that, it may move over maui county Saturday
evening and the big island Saturday night. The band is expected to
move southeast of the big island Sunday night. Numerous showers
can be expected over windward areas as this band passes. In
addition, the strong trades will likely transport scattered
showers over many leeward sections of the smaller islands.

The surface high will gradually weaken early next week. At the
same time, a new front is forecast to approach the region from the
northwest due to a strong new high building behind this front.

The trailing end of the front will likely move over the islands
during the middle of next week, which will produce a wet trade
wind weather pattern.

Aviation
High pressure will build northwest of the state resulting in
strengthening trade winds. High level clouds along the subtropical
jet will gradually shift eastward as an upper level trough moves
over the islands. These high clouds range from fl200-300, but may
thicken up later tonight along the western end of the band.

Moderate turbulence and light icing are both expected within this
cloud band. Airmet tango remains posted for tempo moderate
turbulence in fl200-300 kauai to maui.

The atmosphere will become more unstable later tonight as the
upper trough approaches. Combined with increasing trade winds,
this will cause showers to become more frequent over windward
sections, with areas of MVFR conditions and mountain obscuration
possible. Airmet sierra may be required for mountain obscuration
later tonight.

No other airmets are in effect.

Marine
Trades are forecast to increase across the island waters and hold in
the fresh to strong category through the weekend as high pressure
builds north of the state in the wake of a front. Trades may reach
the strong category across most waters Monday night through
Wednesday with near gales across the typically windier waters
between maui county and the big island. Seas are forecast to reach
the advisory level (10 ft) across the northwest waters late tonight
through Saturday due to a combination of a new northwest swell
filling in and locally generated wind seas. As a result, the
small craft advisory currently in place will remain up and will
likely need to be expanded to other areas in later forecast
packages.

Surf along north and west facing shores will quickly rise overnight
as a new northwest swell fills in from a system that reached storm-
force category Tuesday night into Wednesday as it tracked east of
the date line around 40n. Buoy observations are already
reflecting this new source within the 14-18 second bands (320-330
deg) at the northwest offshore buoys and the nearshore pacioos
hanalei buoy. Surf is forecast to reach the advisory thresholds
for north and west facing shores of the smaller islands by
daybreak Friday morning, then hold through Friday night before
slowly easing over the weekend. Expect this source to gradually
shift out of a more northerly direction through the weekend as it
fades.

A reinforcement out of the northwest is expected to fill in late
Monday, peak Monday night into Tuesday, then fade through midweek.

This source will be from a storm-force low that was depicted in
the latest analysis over the far northwest pacific near the
western aleutians. Ascat showed a decent sized area of strong- to
gale-force westerly winds associated with it focused at the area
within the 300-320 directional band. Guidance remains in decent
agreement and shows this feature tracking eastward to the date
line come Saturday. Surf should remain below the advisory levels
along north and west facing shores as it peaks early next week.

Surf along east facing shores will gradually rise over the weekend
and early next week as the trades increase into the fresh to strong
category, especially next Tuesday as trades reach the strong
category across most waters locally. Limited fetch upstream of the
state, however, should keep the surf below advisory levels for east
facing shores through this time.

Small surf will continue along south facing shores with mainly
background southern pacific pulses moving through.

Hfo watches warnings advisories
High surf advisory until 6 am hst Saturday for north and west facing
shores of niihau, kauai, oahu, and molokai, and for north facing
shores of maui.

Small craft advisory until 6 pm hst Saturday for kauai northwest
waters-kauai windward waters-kauai leeward waters-kauai channel-
oahu windward waters-maalaea bay-pailolo channel-alenuihaha
channel-big island southeast waters.

Discussion... Houston
aviation... Powell
marine... Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 27 mi47 min NE 12 G 13 77°F 1015.5 hPa
51205 29 mi41 min 80°F6 ft
ILOH1 - 1617760 - Hilo, HI 87 mi59 min SSW 5.1 G 6 72°F 80°F1015.5 hPa

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI25 mi47 minNE 810.00 miFair77°F71°F82%1016 hPa

Wind History from HOG (wind in knots)
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Last 24hrCalmCalmW6SE5S3CalmE6CalmCalmN6N7NE10NE17NE15NE17NE15NE12NE12N11NE7NE6NE8NE6NE8
1 day agoE3SE9SE7S4SE6SE6S4SE6SE4CalmN3N4N7N9N9N9NE10NE10NE6NE5N6CalmNW5E5
2 days agoNE10E6NE10S5E5SE5SE7S4S5SE9NW5E13
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Tide / Current Tables for Hana, Maui Island, Hawaii
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Hana
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Fri -- 12:45 AM HST     Moonset
Fri -- 03:05 AM HST     0.78 feet Low Tide
Fri -- 06:34 AM HST     Sunrise
Fri -- 09:50 AM HST     2.14 feet High Tide
Fri -- 01:46 PM HST     Moonrise
Fri -- 04:56 PM HST     0.23 feet Low Tide
Fri -- 05:42 PM HST     Sunset
Fri -- 11:35 PM HST     1.71 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.20.90.80.811.31.61.92.12.121.81.40.90.60.30.20.30.60.91.31.51.7

Tide / Current Tables for Makena, Maui Island, Hawaii
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Makena
Click for Map
Fri -- 12:47 AM HST     Moonset
Fri -- 03:56 AM HST     0.78 feet Low Tide
Fri -- 06:36 AM HST     Sunrise
Fri -- 10:31 AM HST     1.54 feet High Tide
Fri -- 01:48 PM HST     Moonrise
Fri -- 05:44 PM HST     Sunset
Fri -- 05:47 PM HST     0.23 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.90.80.80.80.80.91.11.31.41.51.51.41.20.90.70.40.30.20.30.50.70.91

Weather Map and Satellite Images
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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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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.