Monday, May21, 2018 L-36.com


Marine Weather and Tides
Heeia, 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 7:06PM Monday May 21, 2018 4:18 PM HST (02:18 UTC) Moonrise 12:14PMMoonset 12:34AM Illumination 47% Phase: First Quarter Moon; Moon at 7 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- 332 Pm Hst Mon May 21 2018
Tonight..Northeast winds 20 knots. Wind waves 7 feet. Scattered showers.
Tuesday..Northeast winds 20 knots. Wind waves 6 feet. Scattered showers.
Tuesday night..Northeast winds to 25 knots. Wind waves 6 feet. Northwest swell 3 feet after midnight. Scattered showers in the evening, then isolated showers after midnight.
Wednesday..Northeast winds to 25 knots. Wind waves 6 feet. Northwest swell 3 feet. Isolated showers.
Wednesday night..Northeast winds to 25 knots. Wind waves 7 feet. Northwest swell 3 feet. Scattered showers in the evening, then isolated showers after midnight.
Thursday..Northeast winds to 25 knots. Wind waves 7 feet. Northwest swell 3 feet. Isolated showers.
Thursday night..East winds to 25 knots. Wind waves 7 feet. Northwest swell 3 feet in the evening. Scattered showers in the evening, then isolated showers after midnight.
Friday..East winds 20 knots. Wind waves 5 to 6 feet. Isolated showers.
Saturday..East winds 20 knots. Wind waves 6 to 7 feet. Isolated showers.
PHZ100 332 Pm Hst Mon May 21 2018
Synopsis for hawaiian coastal waters.. Ridge of high pressure will remain north of the waters through the week.

7 Day Forecast for Marine Location Near Heeia, HI
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location: 21.44, -157.81     debug


Area Discussion for -
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Fxhw60 phfo 220132
afdhfo
area forecast discussion
national weather service honolulu hi
332 pm hst Mon may 21 2018

Synopsis
High pressure far northeast of the islands will move to the east
and weaken through Tuesday as a front moves from west to east,
north of the islands. Behind the front, a stronger high will build
in, allowing trades to persist through the second half of the
week.

Discussion
No changes to the forecast this afternoon, with trade winds
expected to continue through the end of the week. High pressure
was analyzed about 1200 miles to the northeast of honolulu this
morning at 1026 mb. There was little change from the overnight
analysis.

Models agree with the high moving to the east over the next 24
hours or so, as a front due north of the islands moves from west
to east. Winds may ease just a bit through tomorrow as a result,
but current guidance continues to suggest trade winds will
persist.

Behind this front, a 1030 mb high was analyzed this morning
about 1450 miles northwest of the islands. This high will move to
the east, and is expected to be due north of the islands by
Wednesday morning, where it will linger through the end of the
week.

Expect trade winds to persist with clouds and showers focused
over the typical windward areas. That being said, precipitable
water (pw) values are at or below normal this afternoon, with
satellite derived pw showing the drier trend continuing upstream.

Models show the next uptick in pw coming on Wednesday. As such,
showers could be limited over the next 24 hours or so. Satellite
shows showery low clouds east of the big island which could reach
there overnight.

No significant rainfall is expected through the end of the week.

A special weather statement continues to be posted for the the kau
area of the big island after overnight and morning activity at
kilauea. Close monitoring of the volcano on the big island
continues, as hawaii volcano observatory personnel indicate that
additional steam-driven explosions are possible at any time.

Ashfall advisories or warnings will be issued if necessary.

Aviation
Moderate to strong low-level NE trades are still in place with
slight weakening into Tuesday as the high centered at 31n141w
weakens and the pressure gradient loosens. Will continue airmet
tango for low-level turbulence should continue until the end of
this period. Otherwise there is a relatively stable pattern in
place period with intermittent interruptions of a few lower
ceilings and a few scattered showers on kauai and windward big
island. This may cause isolated MVFR conditions for ceilings.

Periodic explosive eruptions at kilauea halemaumau crater
continue to produce periods of volcanic ash with a plume of
emissions. Volcanic ash sigmet tango remains in place at this
time.

Marine
Fresh to strong trades associated with high pressure north of the
waters are forecast to hold into this weekend. A small craft
advisory is in effect for the typically windier channel waters
around maui county and the big island through Wednesday, and will
likely be extended through much of the week due to the persistent
breezy winds. Seas will remain rough over these exposed waters.

The current south southwest swell will decline this evening. A
small to moderate south southwest (200-210 deg) is expected to
begin filling in through the day Wednesday, then hold through
Friday before lowering into the upcoming weekend. Surf heights
along south facing shores should remain below advisory conditions
this week.

Small northwest swell will continue through Tuesday, with a slight
pulse coming in on Wednesday, then continuing small through the
rest of the week.

Surf along east facing shores will remain rough as fresh to
strong trades hold locally and upstream south of the high. A
gradual downward trend is possible through Wednesday as a front
passes to the north and the large area of upstream fresh breezes
weaken.

For the long range, guidance continues to depict plenty of energy
setting up within hawaii's swell window from the tasman sea over
the next few days. ECMWF and GFS show back-to-back gale to storm-
force lows nosing northward through the tasman focusing energy
down the 200-220 deg directional band through Wednesday (peak seas
reaching the 30-40 ft range). Wavewatch iii depicts two main
long-period pulses from these sources out of 220 deg filling in at
pago pago with the first source arriving Thursday night into
Friday (5 25) and the second pulse arriving Saturday night into
Sunday (5 27). If this scenario evolves as predicted, these
sources should make it to the local hawaiian waters toward the end
of the month (around 5 29).

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... M ballard
aviation... Chevalier
marine... Foster


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 1 mi49 min ENE 12 G 14 78°F 80°F1017.8 hPa
51210 4 mi49 min 77°F5 ft
51207 4 mi55 min 77°F5 ft
51202 - Mokapu Point, HI (098) 7 mi45 min 77°F7 ft
OOUH1 - 1612340 - Honolulu, HI 10 mi49 min NE 6 G 9.9 80°F 78°F1016.5 hPa
51211 13 mi49 min 78°F4 ft

Wind History for Mokuoloe, HI
(wind in knots)    EDIT      (on/off)   Help
5
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Last
24hr
NE11
E12
G17
E10
G14
E9
G17
E6
G12
E9
G14
E9
NE10
E4
G8
E9
G16
E9
G12
E7
G12
E7
G10
E10
G13
E8
G13
E7
G11
NE9
G12
NE11
G15
NE12
G17
E9
G15
E11
G14
E12
G15
E11
G16
E14
G17
1 day
ago
E14
G20
E12
G17
E14
G19
E10
G15
E9
G12
E11
G16
E11
G18
E15
G20
E14
G17
E9
G16
E8
G15
E8
G12
E10
G16
E11
G16
E9
G14
E8
G13
E11
G17
E11
G17
E10
G16
E9
G15
E7
G12
NE12
G15
E11
G15
NE12
G16
2 days
ago
E10
G14
E8
G15
E11
G15
NE6
G13
E10
G15
E8
G14
E8
G12
E7
G14
E9
G15
E8
G12
E9
G13
E8
G15
E8
G13
E9
G13
E13
G17
E11
G19
E12
G16
E8
G15
E15
E12
G17
E13
G18
E13
G18
E11
G17
E10
G16

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI2 mi82 minENE 1210.00 miMostly Cloudy81°F68°F65%1016.7 hPa
Daniel K Inouye International Airport, HI9 mi26 minENE 18 G 2610.00 miMostly Cloudy and Breezy83°F62°F49%1016.5 hPa
Wheeler Air Force Base / Oahu, HI12 mi23 minE 810.00 miPartly Cloudy78°F63°F61%1016.3 hPa
Oahu, Kalaeloa Airport, HI16 mi26 minNE 10 G 2010.00 miFair82°F62°F51%1017.4 hPa

Wind History from HNG (wind in knots)
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Last 24hrNE9NE7
G16
E6
G24
E11
G15
E5
G14
NE5E6NE10E10
G18
E9E8E6E7E10
G14
E7NE8NE9NE8
G17
E11E11
G16
NE9
G16
NE9E11
G16
NE11
G16
1 day agoE11
G21
E9
G22
E10
G18
E7
G15
E8E16
G21
E14
G22
E13
G22
E14
G21
E12
G19
E9E10
G23
E10
G20
E12
G18
E12
G19
NE7
G16
E15
G19
NE9
G20
E10
G19
NE9
G18
E12
G19
NE9NE12
G16
NE10
G18
2 days agoE9
G16
E9
G15
E9E10E10
G16
E7E8
G19
E7
G16
E8E11
G15
E9E10E6E10
G19
E16
G22
E16
G21
E11
G21
E11
G19
E11
G19
NE10
G18
NE12
G19
E10
G18
E12
G20
E11
G21

Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
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Honolulu
Click for Map
Mon -- 12:34 AM HST     Moonset
Mon -- 04:46 AM HST     -0.09 feet Low Tide
Mon -- 05:51 AM HST     Sunrise
Mon -- 10:39 AM HST     0.67 feet High Tide
Mon -- 12:14 PM HST     Moonrise
Mon -- 02:56 PM HST     0.36 feet Low Tide
Mon -- 05:50 PM HST     First Quarter
Mon -- 07:05 PM HST     Sunset
Mon -- 10:05 PM HST     1.78 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.30.80.40.1-0-0.1-00.20.40.50.60.70.60.50.40.40.40.60.81.21.51.71.81.7

Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Mon -- 12:33 AM HST     Moonset
Mon -- 04:04 AM HST     -0.12 feet Low Tide
Mon -- 05:50 AM HST     Sunrise
Mon -- 09:48 AM HST     0.65 feet High Tide
Mon -- 12:13 PM HST     Moonrise
Mon -- 02:17 PM HST     0.36 feet Low Tide
Mon -- 05:50 PM HST     First Quarter
Mon -- 07:04 PM HST     Sunset
Mon -- 09:08 PM HST     1.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.50.2-0-0.1-0.10.10.30.50.60.60.60.50.40.40.40.50.81.11.41.61.71.61.4

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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Wind Forecast for (22,6,7,8)
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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.