Tuesday, October17, 2017 L-36.com


Marine Weather and Tides
Urban Honolulu, HI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 6:27AMSunset 6:05PM Tuesday October 17, 2017 10:30 AM HST (20:30 UTC) Moonrise 4:40AMMoonset 5:10PM Illumination 7% Phase: Waning Crescent; Moon at 27 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- 933 Am Hst Tue Oct 17 2017
.small craft advisory in effect through early Thursday morning...
Rest of today..Northeast winds to 25 knots. Wind waves 9 feet. North swell 3 feet. Isolated showers through the day.
Tonight..Northeast winds to 25 knots. Wind waves 9 feet. Isolated showers through the night.
Wednesday..Northeast winds to 25 knots. Wind waves 9 feet. Isolated showers through the day.
Wednesday night..East winds to 25 knots. Wind waves 9 feet. Isolated showers through the night.
Thursday..Northeast winds to 25 knots. Wind waves 9 feet. North swell 4 feet in the afternoon. Isolated showers through the day.
Thursday night..East winds to 25 knots. Wind waves 8 feet. North swell 5 feet. Isolated showers through the night.
Friday..Northeast winds 20 knots. Wind waves 7 to 8 feet. North swell 4 to 6 feet. Isolated showers.
Saturday..East winds 15 knots. Wind waves 6 feet. North swell 3 to 4 feet. Isolated showers.
PHZ100 933 Am Hst Tue Oct 17 2017
Synopsis for hawaiian coastal waters.. Strong surface high pressure will persist far north of the islands through Thursday. The trades will begin to ease starting Friday as the high pressure weakens and begins to move eastward.

7 Day Forecast for Marine Location Near Urban Honolulu, HI
   Hourly   EDIT   Help
location: 21.29, -157.88     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 172000
afdhfo
area forecast discussion
national weather service honolulu hi
1000 am hst Tue oct 17 2017

Synopsis
High pressure north of hawaii will keep a windy trade wind
pattern in place through much of the work week, with the trades
trending down slightly Friday and weakening further over the
weekend. Clouds and showers will favor windward and mauka areas
through the period, but showers will reach leeward areas from
time to time as well due to the strength of the trades.

Discussion
Windy conditions will continue to be the main weather player
across the state over the rest of the work week. High pressure
around 1030-1034 mb expected to remain to the north of the state
will result in pressure gradient supportive of strong winds,
locally to wind advisory strength in the windiest areas around
maui county and the big island. See the latest public information
statement for details on peak wind gusts around the state. Along
with the winds, pockets of showers riding along in the trades will
continue to pass over the state. Strength of the wind flow, and
precipitable waters below normal, will keep rain totals generally
on the light side for both windward and leeward areas.

The pattern is expected to shift as we go into the weekend as the
ridge to the north shifts eastward and is replaced by a trough
which carves out from the mid latitude westerlies somewhere to the
north or northwest of the state. GFS ensemble spread is fairly
small for this far out, and ECMWF in good agreement with gfs, thus
the forecast trending towards lighter trade winds Saturday, then
light southeasterly flow Sunday and Monday, looks good. Most areas
should be fairly dry Saturday, however an upper level trough looks
poised to move in from the east on Sunday which will provide more
instability and potential for afternoon and evening showers,
especially interior and leeward areas on Sunday and Monday.

Details will become more clear and the forecast refined over the
coming days for the early part of next week, but there is a threat
of unsettled weather in the state during that time period.

Aviation
High pressure north of the area will continue to deliver strong
trade winds over the state today. Airmet tango for low level
turbulence is posted across the island chain. Scattered showers
riding in on the trade wind flow will stream over the islands,
with some showers being intense but brief and introducing periods
of MVFR to isol ifr CIGS vis. Widespread shower anchoring along
the mountains is not expected, nor is airmet sierra for mountain
obscuration.

Airmet tango for upper level turbulence is also posted between
fl210 and fl280 from molokai through the big island. This will
continue to be evaluated as the tail-end of an upper level moves
away from the state.

Marine
Very strong and gusty trade winds will persist through mid-week
due to a strong surface high far north of the main hawaiian
islands. This high will be replaced by another strong high late
Wednesday, continuing the gusty trades through Friday. The strong
to gale-force trade winds are also producing elevated rough seas
around the islands. A gale warning is posted for the pailolo and
alenuihaha channels through Thursday afternoon, while a small
craft advisory (sca) remains in effect across the remaining
hawaiian waters through the same time. Trade wind speeds are
expected to diminish slightly by Friday as the high starts to
weaken and move east, with winds and seas likely dropping below
sca criteria this weekend.

Elevated rough waves will continue to produce dangerous surf
conditions along most east facing shores across the state. Therefore,
a high surf advisory remains in effect through Wednesday afternoon.

Since the trade winds will continue to be strong, this advisory
will likely be extended through Thursday.

A high surf advisory remains in effect for south facing shores of
all islands through this afternoon. The south swell responsible
for this elevated surf is expected to slowly diminish tonight
through Wednesday. Small southwest and south-southwest swells
arriving this weekend will produce small background surf along
south facing shores.

The current small north-northwest swell is expected to gradually
subside through Wednesday. A long-period north-northwest swell
is expected to arrive Thursday and peak Friday. This swell will likely
produce moderate-sized surf (below the high surf advisory
threshold) along most north facing shores, as well as along some
west facing shores of the smaller islands. A slightly larger
northwest swell may arrive late Sunday, and continue into early
next week.

See the collaborative nearshore swell and wind forecast (srdhfo), for
more detailed information regarding the sources of these swells.

Hfo watches warnings advisories
High surf advisory until 6 pm hst this evening for niihau-kauai
leeward-oahu south shore-waianae coast-molokai leeward-lanai
makai-kahoolawe-maui leeward west-maui central valley-leeward
haleakala-kona-kohala.

High surf advisory until 6 pm hst Wednesday for kauai windward-
oahu koolau-olomana-molokai windward-maui windward west-windward
haleakala-south big island-big island north and east.

Wind advisory until 10 pm hst this evening for lanai-kahoolawe-
big island north and east-kohala.

Small craft advisory until 6 am hst Thursday for kauai northwest
waters-kauai windward waters-kauai leeward waters-kauai channel-
oahu windward waters-oahu leeward waters-kaiwi channel-maui
county windward waters-maui county leeward waters-maalaea bay-
big island windward waters-big island leeward waters-big island
southeast waters.

Gale warning until 6 am hst Thursday for pailolo channel-
alenuihaha channel.

Discussion... Brenchley
aviation... Eaton
marine... Ts


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
OOUH1 - 1612340 - Honolulu, HI 1 mi48 min E 4.1 G 18 80°F 80°F1019.5 hPa
51211 4 mi60 min 80°F4 ft
MOKH1 - 1612480 - Mokuoloe, HI 11 mi54 min ENE 18 G 25 80°F 79°F1019.8 hPa
51202 - Mokapu Point, HI (098) 14 mi56 min 80°F10 ft
51201 - Waimea Bay, HI (106) 29 mi58 min 78°F7 ft

Wind History for Honolulu, HI
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
Last
24hr
E12
G20
NE7
G15
NE8
G16
E8
G20
NE11
G22
NE11
G15
E7
G18
NE6
G14
NE7
G13
NE4
G9
NE5
G11
E3
G16
NE8
G17
NE6
G12
NE7
G11
NE7
G16
NE7
G16
NE10
G15
NE4
G10
NE3
NE10
G18
NE10
G17
NE10
G18
E4
G16
1 day
ago
E7
G19
E8
G20
E9
G28
E8
G17
NE10
G18
E6
G13
NE12
G17
E10
G19
NE9
G19
NE6
G12
NE8
G13
NE8
G19
E6
G12
NE9
G15
NE10
G17
E4
G19
E4
G9
NE4
G7
E7
G19
E7
G14
E12
G21
NE7
G21
E11
G24
E11
G22
2 days
ago
E7
G13
E8
G16
E6
G14
E8
G13
E5
G13
NE6
G11
NE6
G13
NE3
G11
E3
G9
NE2
SE3
G13
E6
G15
NE6
G14
E5
G15
E6
G12
E4
G8
E7
G15
E9
G17
E5
G12
E7
G17
NE9
G17
NE6
G16
NE9
G17
NE7
G21

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Honolulu, Honolulu International Airport, HI5 mi37 minNE 17 G 2510.00 miPartly Cloudy84°F62°F48%1018.5 hPa
Oahu, Kalaeloa Airport, HI10 mi37 minNE 10 G 21 miMostly Cloudy83°F62°F49%1019.6 hPa
Kaneohe, Marine Corps Air Station, HI12 mi93 minENE 14 G 2210.00 miMostly Cloudy82°F64°F56%1018.1 hPa
Wheeler Air Force Base / Oahu, HI15 mi32 minE 12 G 2110.00 miPartly Cloudy78°F63°F62%1018.2 hPa

Wind History from HNL (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
Last 24hrNE18
G26
E22
G28
NE18
G29
NE23
G29
NE20
G26
NE16
G26
NE22
G28
E19
G29
E11
G21
E18
G25
NE16
G23
E15
G21
NE12
G22
E18
G26
NE20NE20
G30
NE15
G23
NE14NE19
G24
NE17
G22
NE10
G21
NE14
G27
NE13
G21
NE17
G25
1 day agoNE18
G28
NE21
G31
NE19
G29
NE20
G26
E21
G27
E23
G30
NE16
G23
NE12
G27
NE12NE16
G20
NE13
G18
E14NE15
G25
NE16
G24
NE17
G22
NE13
G23
NE20
G25
NE15
G21
NE13NE20
G26
E13E18
G25
NE16NE16
G24
2 days agoE12
G21
NE14
G22
E17
G24
NE18
G24
NE16NE17
G25
E16NE11
G20
NE12NE18
G23
NE12NE15
G21
NE13
G23
E13NE11NE13
G20
E12NE11NE15NE12
G19
NE15NE14NE18
G24
NE18
G24

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
Tue -- 02:41 AM HST     1.68 feet High Tide
Tue -- 04:40 AM HST     Moonrise
Tue -- 06:28 AM HST     Sunrise
Tue -- 08:34 AM HST     0.32 feet Low Tide
Tue -- 02:32 PM HST     1.75 feet High Tide
Tue -- 05:10 PM HST     Moonset
Tue -- 06:05 PM HST     Sunset
Tue -- 08:51 PM HST     0.00 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.41.61.71.51.20.90.50.40.30.50.81.21.51.71.71.51.20.80.40.100.10.5

Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Hanauma Bay
Click for Map
Tue -- 01:44 AM HST     1.68 feet High Tide
Tue -- 04:39 AM HST     Moonrise
Tue -- 06:27 AM HST     Sunrise
Tue -- 07:50 AM HST     0.41 feet Low Tide
Tue -- 01:33 PM HST     1.73 feet High Tide
Tue -- 05:09 PM HST     Moonset
Tue -- 06:04 PM HST     Sunset
Tue -- 08:07 PM HST     0.10 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.61.71.51.310.70.50.40.50.81.21.51.71.71.51.20.90.50.20.10.20.50.9

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 (16,3,4,5)
      (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.