Wednesday, April24, 2019 L-36.com


Marine Weather and Tides
Honomu, 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 5:55AMSunset 6:41PM Tuesday April 23, 2019 10:32 PM HST (08:32 UTC) Moonrise 11:09PMMoonset 9:33AM Illumination 77% Phase: Waning Gibbous; Moon at 20 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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PHZ122 Big Island Windward Waters- 905 Pm Hst Tue Apr 23 2019
Rest of tonight..Northeast winds 20 knots. Wind waves 5 feet. Northwest swell 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Wednesday..Northeast winds 15 knots. Wind waves 5 feet. Northwest swell 3 feet. Isolated showers.
Wednesday night..East winds 15 knots. Wind waves 5 feet. North swell 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Thursday..East winds 15 knots. Wind waves 5 feet. North swell 3 feet. Isolated showers.
Thursday night..East winds 15 knots. Wind waves 5 feet. North swell 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Friday..East winds 15 knots. Wind waves 5 feet. North swell 3 feet. Isolated showers.
Friday night..East winds 15 knots. Wind waves 4 feet. North swell 3 feet. Scattered showers.
Saturday..East winds 15 knots. Wind waves 4 feet. North swell 3 feet. Scattered showers.
Sunday..Southeast winds 10 knots. Wind waves 3 to 4 feet. Northwest swell 3 to 5 feet. Scattered showers.
PHZ100 905 Pm Hst Tue Apr 23 2019
Synopsis for hawaiian coastal waters.. A ridge of high pressure will remain north of the state through Thursday, then begin to weaken Friday as a front stalls northwest of the area.


7 Day Forecast for Marine Location Near Honomu, HI
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location: 20.04, -155     debug


Area Discussion for -
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Fxhw60 phfo 240610
afdhfo
area forecast discussion
national weather service honolulu hi
810 pm hst Tue apr 23 2019

Synopsis
Seasonal trade wind conditions will prevail through Thursday as high
pressure remains in place to the north. Clouds and showers will
favor the typical windward locations through this time, leaving
leeward areas mostly dry. Trade winds are forecast to weaken
Thursday through Friday, which will lead to light and variable winds
for the upcoming weekend as a cold front approaches. Clouds and
showers will then become focused over interior locations through the
afternoon periods into early next week.

Discussion
The latest surface analysis depicted a weak front passing north of
the islands and a 1034 mb area of high pressure centered to its
north. Water vapor imagery showed a ridge extending northward
several hundred miles to the west and mostly dry mid- to upper-level
air over the islands. Satellite and the afternoon upper air
soundings showed moisture levels below normal for this time of year
and a strong subsidence inversion between five and six thousand
feet. Rain gages support the dry conditions with minimal
accumulations measured over the past 12-hrs (through 7 pm hst).

Guidance supports the mostly dry and stable trade wind pattern to
continue through Thursday. Upper heights will rise as the previously
mentioned upper ridge shifts eastward over the state. This upper
ridge and dry air aloft combined with a strong subsidence inversion
will limit the rainfall potential coverage, even for windward
locations. The exception will be due to pockets of higher moisture
moving through periodically within the trades, which will translate
to better windward rainfall coverage.

A transition period is expected Friday into the weekend as upper
heights lower and the surface ridge to the north weakens in response
to a shortwave trough and surface front moving into the region.

Trades will veer out of the southeast on or by Saturday and likely
be completely disrupted Sunday through Monday as the upper level
trough moves overhead. An unstable land and sea breeze regime will
result. Expect afternoon clouds and showers over the islands,
followed by partial clearing at night. Increasing instability
associated with the upper trough combined with increasing moisture
and daytime heating will support locally heavy showers.

Additionally, a thunderstorm or two can't be ruled Sunday through
Monday, especially through the afternoon hours.

Though there remains some run-to-run inconsistency in ECMWF and gfs
models, the latest runs suggest that the upper level trough will
move east of the state on Tuesday as the remnants of the above
mentioned front stall near kauai. Though there remains considerable
uncertainty regarding the winds and rainfall pattern, the atmosphere
will likely be increasingly stable, with the likelihood for heavy
rainfall trending down.

Aviation
A surface high pressure northeast of the state will continue to
advance further eastward. This will result in slow and slight
easing of the easterly trades through Wednesday. Low clouds and
embedded showers are still favored over the windward and mauka
locations under the easterly winds and may bring brief MVFR
ceiling to those areas. OtherwiseVFR conditions are expected to
prevail for all sites.

Airmet tango remains in effect for areas south thru west of
mountains below 7000 feet for tempo moderate turbulence this
evening. Winds may ease enough overnight leading to the possible
cancellation.

Marine
Expect moderate to locally strong trades to continue into Thursday,
then ease through the weekend as the surface ridge, currently north
of the islands, gets nudged eastward by a front stalling northwest
of kauai. The small craft advisory for the typical windy waters around
maui and south of the big island GOES through at least Wednesday at
this time. Will keep an eye on winds to see if the SCA needs to be
extended a bit further.

Surf is expected to remain below advisory levels through the week
for all shores. There will be a series of small west-northwest to
north-northwest swells over the rest of this week, with a moderate
size northwest swell arriving late Sunday afternoon, peaking Sunday
night, then lowering through Monday night. A series of small swells
will maintain relatively small surf along south facing shores through
the period with the largest bumps today and Saturday. Surf along east
facing shores will hold steady in the small to moderate range through
Thursday due to the breezy trades, then lower over the weekend as the
trades lessen.

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

Discussion... Gibbs
aviation... Hui
marine... Powell


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51206 18 mi47 min 77°F7 ft
ILOH1 - 1617760 - Hilo, HI 22 mi33 min ENE 5.1 G 8.9 76°F 78°F1018.7 hPa (+1.2)
KWHH1 44 mi33 min E 5.1 G 11 78°F 79°F1017.6 hPa (+1.4)
KLIH1 - 1615680 - Kahului Bay, Maui, HI 98 mi33 min NE 13 G 18 74°F 1019.5 hPa (+1.3)

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI22 mi40 minNE 310.00 miOvercast73°F66°F79%1019.1 hPa

Wind History from HTO (wind in knots)
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Last 24hrE5E5S3SW3CalmSW4W4SW4CalmCalmNE5CalmW4N6N7N8NE8NE9NE8NE7NE4NE5NE8NE3
1 day agoN3SW3SW8SW5SW4SW4W6SW5SW6SW53SW5--E7E10E9E11NE8NE6NE6E5E5E7NE5
2 days agoSW6SW3CalmCalmCalmSW3SW4W9CalmSW5SW3S4SE9SE9E10
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Tide / Current Tables for Hilo, Hawaii Island, Hawaii
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Hilo
Click for Map
Wed -- 02:44 AM HST     0.29 feet Low Tide
Wed -- 05:55 AM HST     Sunrise
Wed -- 06:55 AM HST     0.90 feet High Tide
Wed -- 10:24 AM HST     Moonset
Wed -- 11:36 AM HST     0.25 feet Low Tide
Wed -- 06:41 PM HST     Sunset
Wed -- 07:40 PM HST     2.15 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.50.30.30.40.70.80.90.80.70.40.30.30.40.60.91.31.61.92.12.121.81.4

Tide / Current Tables for Hilo, Hilo Bay, Hawaii
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Hilo
Click for Map
Wed -- 01:48 AM HST     0.76 feet Low Tide
Wed -- 05:36 AM HST     0.99 feet High Tide
Wed -- 05:55 AM HST     Sunrise
Wed -- 10:24 AM HST     Moonset
Wed -- 11:47 AM HST     0.12 feet Low Tide
Wed -- 06:41 PM HST     Sunset
Wed -- 07:43 PM HST     2.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.80.80.80.9110.90.70.50.30.20.10.20.50.81.21.61.92.12.121.81.5

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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Wind Forecast for (4,6,7,8)
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Ground Weather Radar Station Kohala, 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.