Thursday, January18, 2018 L-36.com


Marine Weather and Tides
Kalaoa, HI

Version 3.4
What's New / NOTES
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.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:56AMSunset 6:05PM Wednesday January 17, 2018 7:34 PM HST (05:34 UTC) Moonrise 7:30AMMoonset 6:58PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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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PHZ123 Big Island Leeward Waters- 327 Pm Hst Wed Jan 17 2018
.gale warning in effect through early Friday morning...
Tonight..Winds variable less than 10 knots west of the big island...east gales to 35 knots near south point. Wind waves around 13 feet. Northwest swell 7 feet and southeast 3 feet. Hazy. Isolated showers.
Thursday..Winds variable less than 10 knots west of the big island...east gales to 35 knots near south point. Wind waves around 14 feet. Mixed swell northwest 5 feet and southeast 3 feet. Isolated showers in the morning. Hazy.
Thursday night..Winds variable less than 10 knots west of the big island...east to 30 knots near south point. Wind waves around 14 feet. Mixed swell northwest 4 feet and southeast 3 feet. Hazy. Isolated showers.
Friday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves around 11 feet. Mixed swell northwest 3 feet and southeast 3 feet. Isolated showers in the morning. Hazy.
Friday night..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves around 10 feet. Mixed swell north 3 feet and southeast 3 feet. Hazy. Isolated showers.
Saturday..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves around 9 feet. North swell 3 feet in the morning. SWell southeast 3 feet. Hazy. Scattered showers.
Saturday night..Winds variable less than 10 knots west of the big island...east 15 knots near south point. Wind waves around 7 feet. North swell 3 feet after midnight. SWell southeast 3 feet. Hazy. Scattered showers in the evening. Isolated showers after midnight.
Sunday..Winds variable less than 10 knots west of the big island...east 15 knots near south point. Wind waves 6 to 7 feet. Mixed swell northwest 3 to 5 feet and southeast 3 feet. Hazy. Isolated showers.
Monday..Winds variable less than 10 knots west of the big island...east 15 knots near south point. Wind waves 6 to 7 feet. Northwest swell 5 to 6 feet. Hazy. Scattered showers.
PHZ100 327 Pm Hst Wed Jan 17 2018
Synopsis for hawaiian coastal waters.. Building high pressure far north of the state will bring strong trade winds and elevated, rough seas through Thursday night. As the high moves away from the area later this week, the trades will gradually weaken to moderate speeds. A surface trough developing west of the area this weekend is expected to produce much lighter winds by Sunday.

7 Day Forecast for Marine Location Near Kalaoa, HI
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location: 19.75, -156.05     debug


Area Discussion for -
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Fxhw60 phfo 180124
afdhfo
area forecast discussion
national weather service honolulu hi
324 pm hst Wed jan 17 2018

Synopsis
Strong and gusty trade winds are in store through Thursday as
robust surface high pressure passes north of the state. Clouds and
showers will favor windward and mauka areas, though a few showers
will periodically spread leeward on the gusty trades. Winds will
gradually decrease from Friday into the weekend as the surface
high is pushed far northeast of the islands.

Discussion
Strong and gusty trade winds continue to develop. Currently, a
building 1033 mb surface high is located about 1,100 miles
northwest of kauai, while a decaying front is stalling about 50
miles north of kauai. A rather strong ridge aloft over the region
is maintaining a solid inversion based at 3,500 to 5,500 ft
according to the afternoon soundings and recent aircraft data.

Winds have been steadily ramping up during the past 24 hours, with
numerous stations on maui county and the big island reporting
advisory level winds.

A further increase in winds is expected into Thursday as the
surface high passes north of the state and builds to 1037 mb. The
inversion will remain unchanged in most areas, causing the trade
winds to be accelerated over and around island terrain. As a
result, the wind advisory has been expanded to cover the lower
elevations of all islands, and with the GFS and ECMWF models
showing winds near the inversion level increasing another 5 kt or
so, we will have to closely monitor locations such as the leeward
kohala districts for the potential for high wind warning
conditions. The wind advisory currently runs through Thursday
afternoon, though it will likely need to be extended through
Thursday night for the state and possibly into Friday for portions
of the big island and maui.

Showers will be focused over windward slopes during the next couple
of days. The atmosphere will remain stable, as the inversion
holds firm. The above mentioned decaying frontal band will sag
southward and likely reach kauai tonight, making windward portions
of the garden isle wetter than most areas. This band of moisture
is expected to slowly lift northward late Thursday and Friday. A
separate area of poorly-defined low level moisture is expected to
fill in across windward big island tonight then spread up the
island chain on Friday.

A gradual decrease in trade winds will begin on Friday and
continue into the weekend. During this time, the surface high
will be weakened and pushed off to the northeast of the state,
leaving an associated surface ridge about 300 miles north of kauai
by Friday night. A north pacific trough will erode the surface
ridge during the weekend. During this time, trade winds will veer
out of the east to east-southeast and may become light enough for
daytime sea breezes to dominate across the western end of the
island chain.

Beyond the weekend, the GFS and ECMWF are not in good agreement
on the details of a developing low near midway atoll. However, the
models do show moderate easterly trades hanging on over the big
island with southeasterly flow across the smaller islands. The mid
level ridge currently over the state will likely erode
significantly, leading to some instability and the potential for a
few heavier showers.

Aviation
With high pressure building over the state from the northwest and
north, trade winds will be strengthening. Therefore, low cloud
ceilings and accompanying showers will be mainly affecting
windward and mauka sections with brief to tempo MVFR conditions.

With the stronger winds, low ceilings may also pass over some
leeward sections from time to time as well. Lastly, a front
currently north of kauai and drifting south may affect the isle
tonight with additional clouds and showers.

An airmet for low level turbulence to the lee of the mountains has
been posted for all islands due to the breezy trades.

Marine
The bump in the northwest swell is already on the decline at buoy
51101, and we anticipate the surf along north and west facing
shores to decline overnight. A high surf warning continues
overnight for those areas. Meanwhile, the increasing trade winds
will bring an increase in surf along east facing shores.

Anticipating advisory level surf arriving on Thursday, and
persisting through the end of the week. The high surf advisory for
east facing shores will likely be posted overnight.

The current northwest swell will continue to subside through the
end of the week. New west-northwest and northwest swells are
expected to arrive this weekend, and will again boost surf heights
along north and west facing shores of most of the islands from
Saturday night and Sunday into early next week.

The strong winds and the northwest swell will maintain small
craft advisory (sca) for all waters through at least tomorrow
night. A gale warning is in effect for the typical windier areas
around maui county and the big island through tomorrow night. The
sca will likely need to be extended for some areas as winds and
seas begin to lower this weekend.

See the latest oahu surf discussion (srdhfo) for additional
details on surf and swell.

Hfo watches warnings advisories
Wind advisory until 6 pm hst Thursday for all islands except the
summits of the big island and haleakala.

High surf warning until 6 am hst Thursday for north and west
facing shores of niihau-kauai-oahu-molokai and for north facing
shores of maui.

Gale warning until 6 am hst Friday for maalaea bay-pailolo
channel-alenuihaha channel-big island leeward waters-big island
southeast waters.

Small craft advisory until 6 am hst Friday for kauai northwest
waters-kauai windward waters-kauai leeward waters-kauai channel-
oahu windward waters-oahu leeward waters-kaiwi channel-maui
county windward waters-maui county leeward waters-big island
windward waters.

Discussion... Wroe
aviation... Kinel
marine... M ballard


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 23 mi46 min SW 8.9 G 14 78°F 78°F1016.9 hPa
ILOH1 - 1617760 - Hilo, HI 53 mi52 min NNE 14 G 17 75°F 76°F1021.5 hPa
KLIH1 - 1615680 - Kahului Bay, Maui, HI 82 mi52 min NE 16 G 21 74°F 76°F1021.2 hPa

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI7 mi41 minVar 310.00 miMostly Cloudy77°F57°F50%1017.3 hPa

Wind History from HKO (wind in knots)
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Last 24hrNE15NE18
G26
NE16NE9NE12NE14
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4NE11E5E4CalmE5E9SE13S11S11S9S13S14S10S5NE19E113
1 day agoW3CalmN6NE5E7E6CalmNE9NE10NE10NE13NW8E6NE13
G23
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NW11W6W7W10SW10SW10SW7SW6NW6
2 days agoS8CalmCalmSW3NE4CalmSE6NE5E6NE34NE10N7S6S9S10S13S13SW9W7W6W6W5W4

Tide / Current Tables for Kailua Kona, Hawaii Island, Hawaii
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Kailua Kona
Click for Map
Thu -- 04:58 AM HST     2.19 feet High Tide
Thu -- 07:01 AM HST     Sunrise
Thu -- 08:12 AM HST     Moonrise
Thu -- 11:31 AM HST     0.33 feet Low Tide
Thu -- 04:29 PM HST     1.16 feet High Tide
Thu -- 06:07 PM HST     Sunset
Thu -- 07:48 PM HST     Moonset
Thu -- 10:25 PM HST     -0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.81.31.82.12.22.11.71.30.90.50.40.40.50.811.11.110.70.40.1-0.1-0.1

Tide / Current Tables for Kailua Kona, Big Island, Hawaii
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Kailua Kona
Click for Map
Thu -- 04:45 AM HST     2.22 feet High Tide
Thu -- 07:01 AM HST     Sunrise
Thu -- 08:12 AM HST     Moonrise
Thu -- 11:54 AM HST     0.15 feet Low Tide
Thu -- 04:49 PM HST     0.84 feet High Tide
Thu -- 06:07 PM HST     Sunset
Thu -- 07:48 PM HST     Moonset
Thu -- 10:07 PM HST     0.05 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.511.51.92.22.221.71.30.80.50.20.20.20.40.60.80.80.70.60.30.10.10.1

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
cpac_satellite

GOES Local Image of Hawaii    EDIT
Geos

Wind Forecast for (0,6,7,8)
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Ground Weather Radar Station Kohala, HI
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weather_mapweather_map weather_map

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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.