Wednesday, May22, 2019 L-36.com


Marine Weather and Tides
Laupahoehoe, 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 5:41AMSunset 6:52PM Wednesday May 22, 2019 2:39 PM HST (00:39 UTC) Moonrise 10:39PMMoonset 9:00AM Illumination 84% 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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PHZ122 Big Island Windward Waters- 930 Am Hst Wed May 22 2019
.small craft advisory in effect through early Thursday morning...
Rest of today..East winds to 25 knots. Wind waves 6 feet. Isolated showers through the day.
Tonight..East winds 20 knots. Wind waves 6 feet. Scattered showers in the evening, then isolated showers after midnight.
Thursday..East winds 20 knots. Wind waves 5 feet. SWell south 3 feet. Isolated showers.
Thursday night..East winds 20 knots. Wind waves 5 feet. SWell south 3 feet. Scattered showers in the evening, then isolated showers after midnight.
Friday..East winds 20 knots. Wind waves 5 feet. SWell south 3 feet. Isolated showers.
Friday night..East winds 20 knots. Wind waves 4 feet. SWell south 3 feet. Scattered showers in the evening, then isolated showers after midnight.
Saturday..East winds 15 knots. Wind waves 4 to 5 feet. Northwest swell 3 to 4 feet. Scattered showers.
Sunday..East winds 15 knots. Wind waves 4 to 5 feet. Mixed swell northwest 4 feet and south 3 feet. Scattered showers.
PHZ100 930 Am Hst Wed May 22 2019
Synopsis for hawaiian coastal waters.. A ridge to the north and a stalled front northwest of kauai will slowly shift north as a high strengthens far northeast of the area.


7 Day Forecast for Marine Location Near Laupahoehoe, HI
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location: 20.8, -154.34     debug


Area Discussion for -
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Fxhw60 phfo 221947
afdhfo
area forecast discussion
national weather service honolulu hi
947 am hst Wed may 22 2019

Synopsis
Daytime sea breezes and nighttime land breezes will prevail
through Friday as high pressure remains far northeast of the area
and a frontal boundary remains stalled northwest of the state. A
more typical trade wind weather pattern is expected over the
memorial day weekend as the front weakens and high pressure build
back in toward the area. Clouds and passing showers will tend to
favor windward and mauka areas.

High pressure is currently centered far northeast of the state
while a frontal boundary is located a few hundred miles west
northwest of kauai. This places the islands in a light east to
southeast wind environment. Generally dry conditions prevail
across the area with just a few light passing showers occurring
mainly over windward and mauka locations. Under this light wind
regime, daytime sea breezes and nighttime land breezes will
prevail through tonight. Some increase in shower activity may
occur during the afternoon hours due to sea breeze convergence.

The high and front are forecast to remain in place through Friday,
thus the daytime sea breeze and nighttime land breeze environment
will continue. Satellite imagery shows a band of showery clouds
just upwind of maui and the big island. This band of moisture will
likely move through the area tonight and early Thursday. Shower
activity will likely increase over windward and mauka areas
especially over the east end of the state. Heavy showers are not
expected since a mid level ridge is in place over the area. This
area of moisture will likely exit the state by midday Thursday
with drier conditions expected in its wake.

As we head into memorial day weekend, the front northwest of the
area will weaken and the high to the northeast will build back in.

This will allow for a more typical trade wind weather pattern to
make a return. The airmass will remain rather stable so passing
showers will mainly occur over windward and mauka areas especially
during the night and early morning hours.

Aviation
A front has stalled west of kauai as high pressure builds to the
east of the island chain, allowing for light southeasterly winds
across much of the area through the day. Clouds will develop
along interior and mauka sections of the state this afternoon with
isolated -shra, butVFR conditions are expected to prevail
elsewhere.

Overnight, an area of moisture will make its way toward the big
island and maui as the high continues to move closer to the
state. An airmet for mountain obscuration may be needed by
tomorrow. Winds will strengthen a bit and turn more out of the ese
before finally becoming more easterly late Thursday into Friday.

Marine
A surface ridge will persist and strengthen north of the state, while
a stalled front lingers northwest of the offshore waters. This will
produce easterly trade winds to small craft advisory speeds around
the big island today, with fresh southeast winds over maui county
windward waters. Remaining waters are mostly blocked from the southeast
flow, so winds will be gentle and variable there. The front and ridge
will slowly shift northwest through 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 Thursday, with small to moderate swells into
the middle of next week. Surf along east facing shores will remain
small through the middle of the week. As winds strengthen northeast
of the area during the second half of this week, surf will build
along east facing shores.

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

Discussion... Burke
aviation... Dye
marine... Ts


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 83 mi39 min SE 8.9 G 14 86°F 77°F1015.5 hPa (-1.4)

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, HI84 mi46 minESE 1310.00 miFair88°F64°F46%1016 hPa

Wind History from HTO (wind in knots)
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Last 24hrE12SE9
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1 day agoE11E12SE11SE8SE5S3SW4SW3SW5SW5CalmSE6S3SW3S3CalmS5W6W8S7S4SE7S5SE11
2 days agoE12NE10E8NE5E5CalmCalmSW4SW5SW6W7SW5SW6SW4S5SW4W10W9SE6E8E10
G16
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Tide / Current Tables for Hilo, Hawaii Island, Hawaii
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Hilo
Click for Map
Wed -- 01:09 AM HST     0.20 feet Low Tide
Wed -- 05:26 AM HST     0.90 feet High Tide
Wed -- 05:42 AM HST     Sunrise
Wed -- 09:05 AM HST     Moonset
Wed -- 10:16 AM HST     0.12 feet Low Tide
Wed -- 06:04 PM HST     2.38 feet High Tide
Wed -- 06:51 PM HST     Sunset
Wed -- 10:40 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.20.30.50.70.90.90.70.50.30.10.20.30.71.11.622.32.42.321.71.20.8

Tide / Current Tables for Hilo, Hilo Bay, Hawaii
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Hilo
Click for Map
Wed -- 12:25 AM HST     0.62 feet Low Tide
Wed -- 04:38 AM HST     1.06 feet High Tide
Wed -- 05:42 AM HST     Sunrise
Wed -- 09:05 AM HST     Moonset
Wed -- 10:38 AM HST     -0.11 feet Low Tide
Wed -- 06:14 PM HST     2.45 feet High Tide
Wed -- 06:51 PM HST     Sunset
Wed -- 10:40 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.60.80.911.10.90.70.40.1-0.1-0.10.10.40.91.51.92.32.42.42.21.81.41

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 (20,4,5,8)
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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.