Thursday, May24, 2018

Marine Weather and Tides
Kilauea, HI

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:49AMSunset 7:09PM Thursday May 24, 2018 3:40 PM HST (01:40 UTC) Moonrise 2:38PMMoonset 2:21AM Illumination 77% Phase: Waxing Gibbous; Moon at 10 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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7 Day Forecast for Marine Location Near Kilauea, HI
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location: 36.66, -151.22     debug

Area Discussion for -
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Fxhw60 phfo 241942
area forecast discussion
national weather service honolulu hi
942 am hst Thu may 24 2018

Breezy trade winds are expected to persist through Saturday, which
will focus clouds and showers over windward areas, with a few
brief showers carried over to leeward sections at times. The
trades are expected to ease somewhat from Sunday through early
next week. Trade showers may increase slightly from Friday night
through Saturday, with more widespread rainfall possible across
parts of the state starting next Tuesday.

No significant changes to the forecast at this time, nor any
significant changes expected today. High pressure continues to
dominate the weather with breezy trade winds continuing. This high
pressure north of the islands will slowly shift to the east
starting tomorrow. By Sunday is will be far enough to the east,
with a front passing the islands to the north that trades will
likely ease a bit.

A new high pressure system will set up further north of the
islands Monday, and move to the east during the first half of the
new week. This will continue to keep trade winds on the lighter

Meanwhile, an upper level trough west of the islands will move to
the east through the end of the week, and could help to enhance
trade wind showers as we head into the weekend. This trough
lingers near the western islands through the weekend and into
early next week. This will likely result in some increased shower
activity over what we have been experiencing, but at this time not
expecting any issues with rainfall totals.

A special weather statement continues to highlight the trace
ashfall potential across portions of the big island's kau
district. With trade winds expected to continue into the weekend,
continue to expect any ashfall to be focused over this area.

MainlyVFR conditions are expected for all TAF sites today, though
passing low clouds and showers may bring brief MVFR ceiling and
vis conditions along the windward areas. There may be enough low
cloud coverage to warrant airmet mtn obsc along the windward
slopes at times later today.

Rather brisk trade winds will persist across the area today as a
strong high pressure passes far north of the islands. Airmet
tango series remains posted for low level turbulence over and
immediately south and west of mountains below 8000 feet on all
islands. These conditions are expected to persist through

Periodic explosive eruptions at kilauea halemaumau crater continue
to produce billows of volcanic ash at times, with the plume of
emissions predominately rising to slightly above the inversion
level and spreading to the southwest over kau district on the big
island. MVFR vis can be expected in this area. Sigmet tango series
for volcanic ash remains in effect.

A surface high north of the area will produce locally strong trade
winds through Friday evening. The trades will weaken from Saturday
through memorial day as the high moves east and a front approaches
from the northwest. Winds are expected to strengthen again during
the second half of next week as the front dissipates and a strong
new high builds north of the area. A small craft advisory (sca)
will likely remain in effect through at least Friday night for the
strong trade winds.

Surf will remain below advisory levels along all shores through
at least the middle of next week. A series of swells from the
tasman sea will keeping surf along south facing shores near the
summertime average. Rough surf along east facing shores will
subside early next week as trade winds weaken.

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

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

Discussion... M ballard
aviation... Ts
marine... Donaldson

Weather Reporting Stations
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Airport Reports
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Tide / Current Tables for
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Tide / Current Tables for
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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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (21,6,7,8)
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Ground Weather Radar Station Kauai, HI
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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 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 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.