Saturday, May27, 2017 L-36.com


Marine Weather and Tides
Kahaluu, HI

Version 3.4
What's New / NOTES
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 5:47AMSunset 7:09PM Friday May 26, 2017 11:59 PM HST (09:59 UTC) Moonrise 6:55AMMoonset 8:28PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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
    EDIT      (on/off)   Help
PHZ116 Kaiwi Channel- 940 Pm Hst Fri May 26 2017
Rest of tonight..East winds 15 knots. Wind waves 4 feet. Mixed swell north 3 feet and south 4 feet. Isolated showers.
Saturday..East winds 10 knots. Wind waves 3 feet. Mixed swell north 3 feet and south 5 feet. Isolated showers through the day.
Saturday night..East winds 15 knots. Wind waves 5 feet. Mixed swell north 3 feet and south 4 to 5 feet. Isolated showers.
Sunday..East winds 10 knots. Wind waves 3 feet. Mixed swell northeast 3 feet and south 4 feet. Isolated showers through the day.
Sunday night..East winds 10 knots. Wind waves 3 feet. Mixed swell northeast 3 feet and south 4 feet. Isolated showers.
Monday..East winds 10 knots. Wind waves 3 feet. Mixed swell north 3 feet and south 3 to 4 feet. Isolated showers through the day.
Monday night..Northeast winds 15 knots. Wind waves 3 feet. SWell south 3 feet. Isolated showers.
Tuesday..East winds 15 knots. Wind waves 4 to 5 feet. North swell 3 to 4 feet. Isolated showers.
Wednesday..East winds 20 knots. Wind waves 6 feet. Northwest swell 3 to 4 feet. Isolated showers.
PHZ100 940 Pm Hst Fri May 26 2017
Synopsis for hawaiian coastal waters.. A surface high centered far north-northwest of the islands is forecast to weaken this weekend. In addition...a surface low far northeast of the state will result in lighter winds into early next week. Surface high pressure will begin to gradually build north of the state starting Monday night and Tuesday.

7 Day Forecast for Marine Location Near Kahaluu, HI
   Hourly   EDIT   Help
location: 21.46, -157.8     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 270711 cca
afdhfo
area forecast discussion... Corrected
national weather service honolulu hi
830 pm hst Fri may 26 2017

Synopsis
Light winds with localized land and sea breezes will prevail across
the island chain as pressure gradient slackens across the region
through the memorial day weekend. Passing showers will favor
windward areas, while convection developing in the afternoons and
evenings over the islands will bring showers to the interior and
leeward sections. Typical trade wind weather is expected to return
early part of next week as high pressure is expected to strengthen
just north to northeast of the islands.

Discussion
Mainly fair weather prevails over much of the islands this evening,
as not much low clouds are present in the island vicinity. The
exceptions are kauai, where persistent low clouds continue to bring
some showers to that island and vicinity, and maui and the big
island, where lingering clouds from afternoon convection will
continue through early part of the evening, providing some showers.

Rather light winds present across the island chain this evening,
with land breezes developing, as pressure gradient slackens across
the region.

A weak pressure pattern will prevail in the island vicinity through
the memorial weekend as high pressure far northwest continues to
weaken far northwest. Therefore, synoptic winds will stay light
across the island chain through the holiday weekend, with a general
background easterly flow. Widespread daytime sea breezes and
overnight land breezes are expected. Clouds will build over the
interior and leeward areas of the islands during the day under the
converging sea breezes, with showers developing, while there will be
some clearing at night as diverging land breezes develop. The
background light easterly wind flow may also bring some clouds and
showers to the windward areas at times. An upper level trough
currently northwest of the islands will pass over the area in the
next couple of days. It will bring cold temperatures aloft,
allowing the airmass in the island vicinity to become more unstable.

Showers will be enhanced, with locally heavy downpour possible. As
the upper level trough sweeps in from the northwest, kauai and oahu
may see more active weather on Saturday. And as the trough travels
east, the focus will turn to the eastern islands late Saturday into
Sunday. Atmospheric conditions may become unstable enough for even a
thunderstorms to develop over the big island. Shall consult with the
latest model runs before adding the mention of thunderstorm chance
to the forecast package at this point.

High pressure far northeast of the state is expected to extend
westward early part of next week, and may stay north to
north-northeast of the islands through later part of the next week.

This will bring stronger trade winds back to the island chain by
late Tuesday, with speeds reaching moderate levels later part of
next week. Airmass in the island vicinity is expected to become more
stable as an upper level ridge builds in the region. Thus, typical
trade wind weather is expected for the islands for much of next week
at this point.

Aviation
Light winds will allow island-scale land and sea breezes to drive
weather conditions over the islands and adjacent waters through
Saturday. The expectation is for general clearing and prevailingVFR
over most land areas through early Saturday as land breezes clear
skies. Isol MVFR in shra are possible, mainly over kauai and
adjacent waters, due to the presence of increased moisture
associated with a nearby stalled frontal boundary. Sea breezes
converging over the islands Saturday afternoon will lead to the
development of clouds and showers over island interiors. A
developing trough aloft will destabilize the island atmosphere,
allowing for the development of +shra that are expected to bring
tempo MVFR and isol ifr cig vis, mainly between 22z and 04z.

No airmets are in effect, but localized mountain obscuration may
prompt the issuance of airmet sierra Saturday afternoon.VFR
conditions are expected to prevail at the TAF sites, except for MVFR
cig at phny from 20z-04z, and the chance of brief MVFR conditions at
phli.

Marine
Trade winds will continue to weaken during the memorial day holiday
weekend as the pressure gradient across the region continues to
relax in response to a surface low far north-northeast of the state.

These weaker background winds will also allow the locally generated
wind waves to trend down. Therefore, we do not anticipate a need for
a small craft advisory (sca) into early next week. The latest
forecast indicates the trades may strengthen again around mid-week,
so a SCA may be needed for the typically windy waters adjacent to
the islands of maui county and the big island starting next
Wednesday.

Surf along south facing shores is steadily rising this evening as
the south-southwest swell continues to build. The surf is expected
to peak on Saturday, then slowly subside into early next week. As a
result, a high surf advisory remains in effect through Sunday
afternoon for all south facing shores. Please see the latest coastal
hazard message (cfwhfo) on our website for additional information
about the hazardous surf conditions.

In addition to the building surf along south facing shores, coastal
flooding impacts associated with record-level king tides will
continue each day this weekend along all shores, especially in maui
county and oahu. Beaches and shorelines, boat ramps and docks, and
vulnerable low-lying roads and structures will be impacted during
these late afternoon and early evening high tides. Please see the
special weather statement (spshfo) product on our website for more
information about the potential impacts from the high tides and the
south swell.

A small, long-period south swell (170-190 deg) is expected to arrive
late next week. Otherwise, no significant sources of south swell
energy are expected from mid-week through next weekend. Surf along
east facing shores will trend down through the weekend as the trades
relax. However, a small short-period north-northeast swell will
support small surf along east facing beaches and reefs with exposure
to swell energy from this direction through Monday.

Small background surf is expected to persist along north facing
shores each day, mainly at locations exposed to the north-northeast
swell mentioned above. The latest wave model guidance continues to
show a small to moderate northwest (330 deg) swell filling in from
Monday night through mid-week due to the fetch associated with a
surface low pressure tracking north of the state later this weekend.

Hfo watches warnings advisories
High surf advisory until 6 am hst Sunday for niihau-kauai
windward-kauai leeward-oahu south shore-waianae coast-molokai
leeward-lanai makai-kahoolawe-maui leeward west-windward
haleakala-leeward haleakala-kona-south big island-big island
north and east.

Aviation... Birchard
marine... Houston
rest... Hui


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 2 mi83 min ENE 4.1 G 6 76°F 81°F1016.4 hPa
51210 3 mi59 min 80°F5 ft
51207 3 mi34 min 80°F4 ft
51202 - Mokapu Point, HI (098) 7 mi55 min 79°F4 ft
OOUH1 - 1612340 - Honolulu, HI 11 mi47 min N 1 G 1.9 75°F 79°F1017.1 hPa
51201 - Waimea Bay, HI (106) 22 mi57 min 78°F4 ft

Wind History for Mokuoloe, HI
(wind in knots)    EDIT      (on/off)   Help
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
Last
24hr
E5
E5
E5
E6
NE4
E5
S2
SW1
--
N5
N6
NE6
N4
G7
NE6
G13
NE6
G9
N5
NE5
N4
G7
NE5
NE3
NE3
NE6
NE5
NE2
1 day
ago
E15
G20
NE10
G14
E17
G22
S2
E10
G16
SW2
W2
W3
NW1
E6
G10
E5
G10
E8
G12
E7
G11
NE9
G14
NE11
G14
NE10
G13
NE9
G12
NE10
G13
NE11
G15
NE10
G14
NE8
G11
NE10
NE8
E7
G10
2 days
ago
E8
G11
E6
G10
E7
NE8
E11
G16
E9
G15
E8
G14
E10
G14
E11
G15
NE10
G14
NE10
G13
NE12
G17
NE10
G13
NE13
NE12
G16
E9
G13
NE9
G14
E12
G15
E9
G12

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI2 mi4 hrsENE 47.00 miA Few Clouds77°F66°F69%1014.1 hPa
Honolulu, Honolulu International Airport, HI10 mi66 minN 310.00 miA Few Clouds73°F64°F74%1016.2 hPa
Wheeler Air Force Base / Oahu, HI12 mi61 minWNW 410.00 miPartly Cloudy67°F64°F90%1015.6 hPa
Oahu, Kalaeloa Airport, HI17 mi66 minNE 310.00 miFair73°F64°F74%1017.3 hPa

Wind History from HNG (wind in knots)
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
Last 24hr----------E4E35Calm4NE6NE6N7--NE10NE8--NE6--N6--NE4--NE3
1 day agoE7NE12
G19
NE11
G16
E12
G18
E10
G16
E8555NE5E5NE7
G15
NE9NE8NE10NE10NE9NE11NE11NE9NE10NE7--NE8
2 days ago------NE9
G17
E9
G18
E8
G17
E66E8NE7E7E7E7
G15
NE8
G15
NE10
G17
NE12--NE11
G17
NE10NE11NE10
G17
NE8NE9
G15
NE11
G17

Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Honolulu
Click for Map
Sat -- 12:16 AM HST     -0.03 feet Low Tide
Sat -- 05:03 AM HST     0.68 feet High Tide
Sat -- 05:49 AM HST     Sunrise
Sat -- 07:56 AM HST     Moonrise
Sat -- 10:30 AM HST     -0.33 feet Low Tide
Sat -- 05:55 PM HST     2.41 feet High Tide
Sat -- 07:07 PM HST     Sunset
Sat -- 09:31 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-000.20.40.60.70.60.40.1-0.1-0.3-0.3-0.10.30.91.422.32.42.31.91.40.90.4

Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Hanauma Bay
Click for Map
Sat -- 04:09 AM HST     0.62 feet High Tide
Sat -- 05:49 AM HST     Sunrise
Sat -- 07:55 AM HST     Moonrise
Sat -- 09:47 AM HST     -0.32 feet Low Tide
Sat -- 05:00 PM HST     2.29 feet High Tide
Sat -- 07:07 PM HST     Sunset
Sat -- 09:30 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-00.10.30.50.60.60.40.2-0.1-0.3-0.3-0.20.20.71.31.82.22.32.21.91.40.90.50.1

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
cpac_satellite

GOES Local Image of Hawaii    EDIT
Geos

Wind Forecast for (5,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Molokai, HI
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.