Thursday, May23, 2019 L-36.com


Marine Weather and Tides
Heeia, 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 5:48AMSunset 7:07PM Thursday May 23, 2019 5:32 AM HST (15:32 UTC) Moonrise 11:41PMMoonset 10:06AM Illumination 79% 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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PHZ116 Kaiwi Channel- 330 Am Hst Thu May 23 2019
Today..East winds 20 knots. Wind waves 5 feet. Northwest swell 3 feet in the morning. SWell south 3 feet. Isolated showers through the day.
Tonight..East winds 15 knots. Wind waves 6 feet. SWell south 3 feet. Isolated showers after midnight.
Friday..East winds 15 knots. Wind waves 6 feet. Northwest swell 3 feet in the afternoon. SWell south 3 feet. Isolated showers.
Friday night..East winds 20 knots. Wind waves 7 feet. Mixed swell northwest 4 feet and south 3 feet. Isolated showers through the night.
Saturday..East winds 15 knots. Wind waves 6 feet. Mixed swell northwest 4 feet and south 3 feet. Isolated showers in the morning.
Saturday night..East winds 15 knots. Wind waves 6 feet. Mixed swell northwest 4 feet and south 4 feet. Isolated showers after midnight.
Sunday..East winds 15 knots. Wind waves 5 to 6 feet. Mixed swell northwest 4 feet and south 4 feet. Isolated showers.
Monday..East winds 15 knots. Wind waves 5 feet. Mixed swell north 3 to 4 feet and south 3 to 4 feet. Isolated showers.
PHZ100 330 Am Hst Thu May 23 2019
Synopsis for hawaiian coastal waters.. A ridge north of the state and a front stalled northwest of the islands will slowly shift north as a high strengthens far northeast of the area.


7 Day Forecast for Marine Location Near Heeia, HI
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location: 21.44, -157.81     debug


Area Discussion for -
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Fxhw60 phfo 231347
afdhfo
area forecast discussion
national weather service honolulu hi
347 am hst Thu may 23 2019

Synopsis
A light to moderate east- southeast wind flow will prevail across
the area through Friday as a high pressure area remains far
northeast of the islands. This high pressure strengthens on
Friday, resulting in the return of the trades Friday night and
Saturday, which will remain with us through through at least the
first half of next week. Expect trade wind showers to affect the
islands during this stretch, favoring mainly the windward and
mountain areas, especially during the nights and mornings. There
will be some local afternoon cloudiness over the lee and interior
areas of most islands with isolated showers as well.

Discussion
The main hawaiian islands are under the western part of an area
of high pressure with the center located far northeast of the
area. Under this part of the high, the winds are east-southeast,
where there is some degree of blocking by the islands upwind. This
will lead to daytime sea breezes for especially islands like
kauai, oahu, and lanai. This pattern not only raises the humidity
up a little, but also the discomfort level as well.

The return of the trades is held in check by a stalled front some
450 miles northwest of kauai. This front will be reinforced by
another front, where they are forecast to meet up tonight, before
pushing eastward. This reinforced front will then stall some 240
miles northwest of kauai early Saturday, and will remain there
and slowly weaken through at least the first half of next week.

As the front stalls, the high northeast of the islands
strengthens and the trades come back to the islands in the
process. And when the trades return, it will be locally strong
before softening a notch to moderate speed late in the weekend.

This strength will hold through the middle of next week, and be
light enough for locally day time sea breezes to develop, resulting
in some afternoon clouds over interior and lee areas of all
islands. But during this stretch through Tuesday, ridging in the
mid and upper levels will maintain a low level inversion between 6
and 9k feet, which will keep the afternoon showers to a minimum,
unless there are organized cloud features that may bump up the
chances for a shower. Such is the case of today, and perhaps on
Friday, where the islands could be affected a couple of bands of
clouds and showers. Currently, the first of two bands is over the
island's windward waters. Both the ECMWF and GFS solutions, are
suggesting the band will fall apart as it eases through the
islands today, causing an uptick windward and mauka showers. This
added moisture may coincide with the daytime heating in the
lighter wind areas such as the lee and interior areas of kauai,
oahu, and even lanai. This may result in a bit more interior and
leeward showers than the past few days.

The second band of clouds and showers is slated to reach windward
big island early this evening, then gradually work its way
westward, reaching oahu about daybreak Friday, then clearing kauai
Friday evening. The models are not indicating any more organized
weather features such as these bands over the memorial day weekend
at this time.

Aviation
A ragged band of showery low clouds affects windward and southeast
facing shores and slopes of maui and the big island, and it is
poised to affect islands farther to the west as well later this
morning. Airmet sierra for mountain obscuration is in effect for
north and east sections of maui and the big island. That said, taf
sites are predominantlyVFR.

Marine
A surface ridge will persist and strengthen north of the state, while
a stalled front lingers northwest of the offshore waters. This has
produced easterly trade winds to small craft advisory (sca) speeds
around the big island, with moderate to breezy southeast winds
over maui county windward waters. However, the winds are expected
to ease somewhat this morning and fall below SCA criteria. Also,
remaining waters are mostly blocked from the southeast flow, so
winds will be lighter and more variable there. The front and ridge
will slowly shift northwest through the rest of the week, causing
winds to back out of the east over the smaller islands by Friday,
with easterly trades persisting through next week.

Small to moderate surf will continue along south facing shores through
Friday. A fairly large, long-period swell is forecast to reach the
coastal waters Saturday, and may produce surf near advisory level
along south facing shores through memorial day. A smaller, reinforcing
south swell is possible Tuesday. Surf along north facing shores will
be quite small through today, then small to moderate swells are
expected to arrive into the middle of next week. Lastly, as winds
strengthen northeast of the area over the next day or two, surf
will see a bump along east facing shores.

Hfo watches warnings advisories
None.

H lau powell kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 1 mi57 min ESE 6 G 8.9 78°F 82°F1016.3 hPa
51207 4 mi39 min 78°F4 ft
51210 4 mi33 min 78°F4 ft
51202 - Mokapu Point, HI (098) 7 mi33 min 78°F5 ft
OOUH1 - 1612340 - Honolulu, HI 10 mi33 min Calm G 1 1016.1 hPa (+0.0)
51211 13 mi33 min 80°F3 ft
51212 20 mi33 min 80°F4 ft
51201 - Waimea Bay, HI (106) 23 mi21 min 75°F3 ft

Wind History for Mokuoloe, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI2 mi86 minESE 510.00 miPartly Cloudy78°F72°F82%1015.6 hPa
Daniel K Inouye International Airport, HI9 mi40 minN 010.00 miA Few Clouds74°F69°F85%1016.1 hPa
Wheeler Air Force Base / Oahu, HI12 mi97 minN 010.00 miFair69°F66°F94%1015.2 hPa
Oahu, Kalaeloa Airport, HI16 mi40 minNNE 310.00 miFair71°F66°F87%1017.3 hPa

Wind History from HNG (wind in knots)
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Last 24hrE8E5E10E9E10E9E10NE10NE10NE10NE11NE9E9E9E10E7E9E86E6E7E9E7E5
1 day agoCalmCalmN4NW4N5NE6N8N8N8NE9NE9NE8N8NE6NE5E5E7E5E6E5E5E7SE5E6
2 days agoE7E7E6E6E8E11E9
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E10E9SE7E4E6E5CalmW4W4CalmCalmCalmS3SW4

Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Thu -- 02:23 AM HST     0.09 feet Low Tide
Thu -- 05:50 AM HST     Sunrise
Thu -- 06:45 AM HST     0.38 feet High Tide
Thu -- 10:05 AM HST     Moonset
Thu -- 11:09 AM HST     0.16 feet Low Tide
Thu -- 06:58 PM HST     1.76 feet High Tide
Thu -- 07:05 PM HST     Sunset
Thu -- 11:40 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.20.10.10.20.30.40.40.30.30.20.20.20.30.60.91.21.51.71.81.71.51.20.9

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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Wind Forecast for (11,2,3,4)
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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.