Friday, April20, 2018 L-36.com


Marine Weather and Tides
Ualapu'e, HI

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:01AMSunset 6:48PM Friday April 20, 2018 8:37 AM HST (18:37 UTC) Moonrise 10:14AMMoonset 11:52PM Illumination 29% Phase: Waxing Crescent; Moon at 5 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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PHZ120 Pailolo Channel- 330 Am Hst Fri Apr 20 2018
.small craft advisory in effect through early Saturday morning...
Today..East winds to 25 knots. Wind waves 7 feet. Northwest swell 3 feet. Scattered heavy showers.
Tonight..Northeast winds to 25 knots. Wind waves 5 feet. Northwest swell 3 feet. Isolated showers through the night.
Saturday..East winds to 25 knots. Wind waves 6 feet. Northwest swell 3 feet. Isolated showers in the morning, then scattered showers in the afternoon.
Saturday night..East winds to 25 knots. Wind waves 7 feet. Northwest swell 3 feet. Scattered showers in the evening, then isolated showers after midnight.
Sunday..East winds to 25 knots. Wind waves 6 feet. Northwest swell 3 feet. Isolated showers.
Sunday night..Northeast winds to 25 knots. Wind waves 7 feet. Northwest swell 4 feet. Isolated showers.
Monday..Northeast winds to 25 knots. Wind waves 7 to 8 feet. Northwest swell 4 feet. Isolated showers.
Tuesday..Northeast winds to 25 knots. Wind waves 7 to 8 feet. Northwest swell 3 to 4 feet. Isolated showers.
PHZ100 330 Am Hst Fri Apr 20 2018
Synopsis for hawaiian coastal waters.. A high far north of the islands will move east through early next week. A trough aloft will produce locally heavy downpours and a slight chance of Thunderstorms today. A new high will build nw of the area early next week.

7 Day Forecast for Marine Location Near Ualapu'e, HI
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location: 21.05, -156.88     debug


Area Discussion for -
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Fxhw60 phfo 201330
afdhfo
area forecast discussion
national weather service honolulu hi
330 am hst Fri apr 20 2018

Synopsis
Wet weather and cloudy skies will remain in place through today,
particularly over windward areas. Some showers may be heavy at
times and isolated thunderstorms are possible. A typical trade
wind pattern will return tonight, with showers favoring windward
and mauka areas. High pressure north of the state will maintain
moderate to breezy trade winds through the weekend, before
strengthening to locally windy levels next week.

Discussion
An upper level trough across the main hawaiian islands has
destabilized our airmass, while an old frontal boundary embedded
within trade flow supplies low level moisture from the east. This
combination warrants continuation of a flash flood watch through
this afternoon. Mostly cloudy to overcast conditions will prevail
across the state, with an extensive shield of mid and high cloud
currently extending well southwest of the island chain. These
layered clouds are pushing east, raising chances of winter
weather at the big island summits. A winter storm warning has been
extended there through tonight.

Radar shows showers pushing into windward areas at this hour, with
some of these showers becoming briefly heavy across windward
sections of kauai, oahu and maui. Models show continued trade
flow through the forecast period, so showers will continue to
favor windward and mountains areas. However, leeward locations
will get wet as well from time to time. The upper trough will push
eastward across the islands through today, maintaining the
possibility of heavy rainfall and thunderstorms. By this evening,
drier air from the east and increasing stability will gradually
decrease shower intensity and coverage.

A surface ridge to the north will maintain moderate to locally
breezy trade winds tonight through the weekend. High pressure
will strengthen Monday bringing trades to locally windy levels
through Wednesday. Overall, a fairly typical trade wind pattern is
expected through the period, with bands of enhanced clouds and
showers drifting through the islands from time to time. Showers
will focus over windward and mauka areas with some showers riding
the strong trades to leeward locations.

Aviation
A ridge of high pressure north of the state will keep a moderate
trade wind flow in place through tonight. Abundant moisture over
the state along with an upper level trough moving overhead will
result in showery weather this morning in windward areas with
conditions improving from northwest to southeast down the island
chain this afternoon. Widespread MVFR CIGS vsbys are expected
this morning for windward areas, withVFR conditions then
developing from northwest to southeast down the island chain this
afternoon. PredominantlyVFR conditions are expected tonight,
with some MVFR CIGS vsbys possible across windward sections of
maui and the big island.

Airmet sierra remains in effect for mountain obscuration over
north thru east sections of kauai, oahu, molokai, maui and the
big island. These conditions are expected to continue through the
morning, with improving conditions this afternoon.

Airmet tango remains in effect for low level turbulence below 100
over and downwind of the terrain of all islands. These conditions
will likely continue through the day. Airmet tango is also in
effect for moderate upper level turbulence between fl250 and
fl450 due to a jet stream in the vicinity of the islands. This
airmet will likely remain in place through Saturday.

Airmet zulu remains in effect for moderate icing between 120 and
fl250 from molokai eastward to the big island. These conditions
are expected to continue through the morning, although some
improvement is possible over the maui county islands.

Marine
A surface high north of the area will move northeast through
Saturday. The high is producing locally strong trade winds over
hawaiian waters, but a trough aloft is keeping winds weaker than
might be expected. The trough will bring a slight chance of
thunderstorms with locally heavy downpours today.

A small craft advisory (sca) continues through early Saturday
morning for strong trade winds in the windier areas near maui
county and the big island. A new high building northwest of the
area will cause the trade winds to strengthen starting this
weekend. The SCA will likely be extended and expanded.

Surf is expected to remain below high surf advisory (hsa)
thresholds along all shores through this weekend. Rough surf will
persist along east facing shores through Sunday night due to the
trade winds, but heights will remain moderate through the weekend.

As trade winds strengthen early next week, surf may approach the hsa
threshold.

A moderate northwest swell is expected to build today. A slightly
larger swell will peak Sunday and another moderate swell is
possible next Thursday.

A series of small swells from the southern hemisphere will maintain
modest surf along south facing shores chain through this weekend.

Lows in the southern hemisphere may strengthen and shift east
enough to produce some bigger surf along south facing shores by
the end of next week.

See the collaborative surf discussion for additional details on
surf and swell.

Hfo watches warnings advisories
Flash flood watch through this afternoon for niihau-kauai-oahu-
molokai-lanai-kahoolawe-maui-kona-south big island-big island
north and east-kohala-big island interior.

Winter storm warning until 6 am hst Saturday for big island
summits.

Small craft advisory until 6 am hst Saturday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Discussion... Powell
aviation... Jelsema
marine... Donaldson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 24 mi55 min N 13 G 16 75°F 76°F1017.8 hPa
51205 24 mi37 min 76°F7 ft
51202 - Mokapu Point, HI (098) 49 mi63 min 75°F7 ft

Wind History for Kahului, Kahului Harbor, HI
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Last
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N12
G17
NE14
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G20
NE14
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G22
NE16
G22
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G21
NE13
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E10
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NE3
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G24
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N9
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NE13
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G22
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G28
NE17
G25
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NE15
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G16
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G18
NE15
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NE9
G14
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G16
NE8
G12
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G15
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NE12
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G18
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G20
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NE18
G24
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G26
NE14
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NE12
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NE9
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G19
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G21
NE15
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G22
NE13
G24
NE11
G15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI13 mi47 minNNE 515.00 miOvercast75°F66°F74%1018.3 hPa
Kaunakakai, Molokai Airport, HI14 mi43 minNNE 510.00 miA Few Clouds76°F66°F72%1018.2 hPa
Lanai City, Lanai Airport, HI19 mi41 minNE 1010.00 miFair71°F64°F81%1017.8 hPa

Wind History from HJH (wind in knots)
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Last 24hrN8
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------------------------E5NE5
1 day agoNE10NE13NE13NE13
G21
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------------------------NE11
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NE8
2 days agoNE20
G27
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NE18NE13
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NE15------------------------NE12
G18
NE14

Tide / Current Tables for Kamalo Harbor, Molokai Island, Hawaii
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Kamalo Harbor
Click for Map
Fri -- 02:29 AM HST     0.16 feet Low Tide
Fri -- 06:04 AM HST     Sunrise
Fri -- 06:38 AM HST     0.64 feet High Tide
Fri -- 10:14 AM HST     Moonrise
Fri -- 12:21 PM HST     -0.06 feet Low Tide
Fri -- 06:48 PM HST     Sunset
Fri -- 07:46 PM HST     2.01 feet High Tide
Fri -- 11:51 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.30.20.20.30.50.60.60.60.40.20-0.1-00.10.50.91.31.7221.91.61.3

Tide / Current Tables for Kaunakakai, Molokai (Hawaii)
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Kaunakakai
Click for Map
Fri -- 02:35 AM HST     0.26 feet Low Tide
Fri -- 06:04 AM HST     Sunrise
Fri -- 07:20 AM HST     0.70 feet High Tide
Fri -- 10:15 AM HST     Moonrise
Fri -- 12:42 PM HST     0.06 feet Low Tide
Fri -- 06:49 PM HST     Sunset
Fri -- 08:20 PM HST     2.01 feet High Tide
Fri -- 11:52 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.40.30.30.40.50.60.70.70.60.40.20.10.10.20.40.81.21.61.9221.81.5

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (14,3,4,5)
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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 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.