Monday, October21, 2019 L-36.com


Marine Weather and Tides
Urban Honolulu, HI

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:27AMSunset 6:04PM Sunday October 20, 2019 10:16 PM HST (08:16 UTC) Moonrise 11:51PMMoonset 12:38PM Illumination 48% Phase: Third Quarter Moon; Moon at 22 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- 930 Pm Hst Sun Oct 20 2019
Rest of tonight..East winds 15 knots. Wind waves 6 feet. North swell 3 feet. Scattered showers.
Monday..East winds 20 knots. Wind waves 5 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Monday night..East winds 20 knots. Wind waves 6 feet. Isolated showers.
Tuesday..East winds 20 knots. Wind waves 7 feet. Isolated showers through the day.
Tuesday night..East winds 20 knots. Wind waves 7 feet. Northwest swell 3 feet. Isolated showers.
Wednesday..East winds 15 knots. Wind waves 7 feet. Northwest swell 3 feet. Isolated showers.
Wednesday night..East winds 15 knots. Wind waves 6 feet. Northwest swell 3 feet. Isolated showers.
Thursday..East winds 15 knots. Wind waves 5 feet. Northwest swell 3 to 4 feet. Isolated showers.
Friday..East winds 15 knots. Wind waves 4 to 5 feet. North swell 4 to 5 feet. Isolated showers.
PHZ100 930 Pm Hst Sun Oct 20 2019
Synopsis for hawaiian coastal waters.. A ridge of high pressure north of the area will lift north and strengthen over the next few days. The ridge is expected to weaken during the second half of the week as a front passes to the north.


7 Day Forecast for Marine Location Near Urban Honolulu, HI
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location: 21.29, -157.88     debug


Area Discussion for -
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Fxhw60 phfo 210648
afdhfo
area forecast discussion
national weather service honolulu hi
848 pm hst Sun oct 20 2019

Synopsis
Light winds are expected through tonight as high pressure lingers
far to our northeast. Showers will continue to favor windward and
mauka areas. Moderate trades are expected to return on Monday and
linger through Thursday with passing showers focused over windward
and mauka areas, especially during the night and early morning
hours. Trade winds will become lighter as we head into next
weekend due to a front developing to our north.

Discussion
Have decreased pops overnight for the western end of the state,
based on the latest satellite and radar data. Satellite derived
precipitable (pw) continues to show the highest values to the
southwest outside the coastal waters, and the values over kauai
and oahu and surrounding waters should be on the decline
overnight.

The general forecast philosophy remains the same for the forecast
period. Satellite derived pw shows some increased moisture east of
the big island that could be moving in there by tomorrow
afternoon. Pw values are around 1.6 inches which is near normal
for october, so just looking for an increase in some of the trade
wind showers mostly over the windward side of the island.

The front to the far north is weakening as it continues to move to
the east tonight. By Monday morning, we expect the ridge to the
north to lift northward, which will allow winds to become more
easterly across the state. This will also allow wind speeds to
rebound back to more moderate levels into the middle of the week.

Expect passing trade showers through Thursday focused over the
typical windward and mauka areas.

Heading into the next weekend, another front to the north of the
islands will once again turn the winds to the southeast. The
latest global model runs are showing an uptick in pw coming in
over the islands from the southeast during this time. Will have to
watch future model runs to see how much pw will make it into the
islands and when, to determine any such impact.

Aviation
Trade winds will re-strengthen as we head into Monday, which will
focus most of the clouds and shower activity on the windward side
of the islands for the next few days. Brief MVFR conditions are
possible in passing showers, butVFR conditions are expected to
prevail, with no airmets expected through Monday.

Marine
Since the most current winds remain at borderline small craft
advisory (sca) speeds, the SCA continues through Monday
afternoon.

A front will stall well north of the islands and dissipate
Monday, which will result in the nearby ridge moving north and
strengthening. This will boost winds slightly across the area and
will likely lead to an expansion of the SCA to include other
typically windy zones by Tuesday. Another front approaching late
in the week may once again lead to diminishing winds.

Small background northwest swells will persist over the next
several days along north facing shores. Further out, the latest
model guidance is indicating surf rising late Wednesday through
Thursday and peaking Friday along north facing shores. There are
still some uncertainties with the swell heights as the swell
makes it to local shores. However, with the typical low bias of
these models, the isles may see surf heights near high surf
advisory levels along north and west facing shores later this
week.

Trade winds will push short-period wind waves onto east facing
shores for at least the next couple of days, trending down later
in the week. Surf along south facing shores will remain small
through the week with mainly background swells out of the sw, s,
and se.

Hfo watches warnings advisories
Small craft advisory until 6 pm hst Monday for alenuihaha
channel-big island leeward waters-big island southeast waters.

Discussion... M ballard
aviation... Ts
marine... Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OOUH1 - 1612340 - Honolulu, HI 1 mi53 min ENE 2.9 G 7 81°F 83°F1016.6 hPa
51211 4 mi47 min 82°F3 ft
MOKH1 - 1612480 - Mokuoloe, HI 11 mi41 min E 4.1 G 8.9 80°F 82°F1017 hPa
51202 - Mokapu Point, HI (098) 14 mi47 min 81°F6 ft
51210 14 mi47 min 80°F5 ft
51212 14 mi47 min 83°F4 ft
51207 15 mi47 min 81°F5 ft
51201 - Waimea Bay, HI (106) 29 mi41 min 78°F4 ft

Wind History for Honolulu, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Daniel K Inouye International Airport, HI5 mi24 minNE 1110.00 miA Few Clouds81°F69°F67%1016.4 hPa
Oahu, Kalaeloa Airport, HI10 mi4.9 hrsWNW 710.00 miOvercast83°F75°F77%1014.9 hPa
Kaneohe, Marine Corps Air Station, HI12 mi45 minE 710.00 miMostly Cloudy81°F71°F72%1016.3 hPa
Wheeler Air Force Base / Oahu, HI15 mi21 minN 010.00 miMostly Cloudy73°F70°F93%1016.1 hPa

Link to 5 minute data for PHNL

Wind History from HNL (wind in knots)
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Last 24hrNW4NW3N4NE3NE3CalmN4N3N4NE3E4SE5NE83NE9NE7N55NE10NE9NE7NE11NE10NE11
1 day agoE8E8E10E9E4E8NE7NE6E5NE7NE7E11NE13NE11
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2 days agoE6NE4NE5NE7N33NE6N5NE5NE8NE12NE7NE17
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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
Mon -- 01:48 AM HST     0.53 feet Low Tide
Mon -- 02:41 AM HST     Last Quarter
Mon -- 06:28 AM HST     Sunrise
Mon -- 09:31 AM HST     2.04 feet High Tide
Mon -- 01:31 PM HST     Moonset
Mon -- 05:32 PM HST     0.32 feet Low Tide
Mon -- 06:01 PM HST     Sunset
Mon -- 10:48 PM HST     0.88 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.50.50.60.811.31.61.9221.91.61.310.70.50.30.30.40.60.70.80.9

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 (4,6,7,8)
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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 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.