Monday, October23, 2017 L-36.com


Marine Weather and Tides
Manele, 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 6:29AMSunset 6:01PM Monday October 23, 2017 2:09 PM HST (00:09 UTC) Moonrise 9:51AMMoonset 9:13PM Illumination 15% Phase: Waxing Crescent; Moon at 4 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
PHZ118 Maui County Leeward Waters- 955 Am Hst Mon Oct 23 2017
Rest of today..South winds 10 knots. Wind waves 4 feet. Northwest swell 5 feet. Haze. Occasional heavy showers and isolated Thunderstorms.
Tonight..South winds 10 knots veering northwest after midnight. Wind waves 5 feet. Northwest swell 4 feet. Haze through the night. Occasional heavy showers in the evening. Isolated Thunderstorms through the night. Heavy showers likely after midnight.
Tuesday..North winds 20 knots. Wind waves 5 feet. Northwest swell 5 feet. Haze in the morning. Heavy showers likely in the morning. Isolated Thunderstorms through the day. Scattered heavy showers in the afternoon.
Tuesday night..North winds 15 knots. Wind waves 5 feet. Northwest swell 6 feet. Scattered showers.
Wednesday..North winds 10 knots. Wind waves 3 feet. Northwest swell 7 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Wednesday night..North winds 15 knots. Wind waves 4 feet. Northwest swell 7 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 3 feet. Northwest swell 5 to 6 feet.
Friday..Northeast winds 10 knots. Wind waves 3 feet. Northwest swell 7 to 9 feet. Isolated showers.
PHZ100 955 Am Hst Mon Oct 23 2017
Synopsis for hawaiian coastal waters.. A front northwest of the area is moving southeastward toward the main hawaiian islands. The front is expected to affect kauai waters tonight, then sweep across the island chain, reaching the big island waters Tuesday. Thunderstorms are possible ahead of and along the front. A new high will build far northwest of the area by the middle of the week.

7 Day Forecast for Marine Location Near Manele, HI
   Hourly   EDIT   Help
location: 20.67, -157.6     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 232000
afdhfo
area forecast discussion
national weather service honolulu hi
1000 am hst Mon oct 23 2017

Synopsis
Heavy showers and thunderstorms associated with a strong cold front
and upper trough approaching could lead to flash flooding,
especially from oahu to the big island today through Tuesday. The
front will reach kauai tonight, then continue down the island chain
and shift east of the big island Wednesday night into Thursday.

Cooler and drier air with breezy northerly winds will follow the
front through the second half of the week.

Discussion
Water vapor loop across the central pacific shows an amplifying
upper pattern across the northern pacific, characterized with a
building ridge east of japan and a shortwave trough digging
southeastward toward the hawaiian islands. A cold front associated
with the upper trough is located about 300 miles northwest of
kauai this morning advancing towards the southeast at around 25
mph. Meanwhile, an area of pre-frontal showers and thunderstorms
are lifting up from the southwest over kauai and oahu this
morning, and will be moving onto maui county this afternoon.

Satellite derived precipitable water (pw) imagery showed a large
area of around 2 inches filling in over the state from the south.

Rainfall coverage will steadily spread southeastward the rest of
today.

Impacts will include: the potential for flash flooding, strong
thunderstorms (an isolated severe storm can't be ruled out), gusty
downslope winds mixing down over windward areas (oahu and kauai),
and the potential for a wintry mix and gusty southwest winds over
the summits tonight into Tuesday.

A flash flood watch remains in effect for oahu, maui county and the
big island through Tuesday. A high wind watch remains in place for
the summits on the big island for late today through Tuesday as
southwest winds ahead of the upper trough strengthen and become
hazardous (gusts to 65 mph).

The cold front will reach kauai tonight and will provide a brief
uptick in showers that will spread southeast down the island chain
on Tuesday. Drier and cooler air will fill in west to behind the
front Tuesday into Wednesday. Some lingering moisture can't be
ruled out over the big island through this time, if the boundary
were to stall. Dewpoints are forecast to reach the 50s over oahu
and kauai Tuesday through midweek in the wake of the front, then
steadily climb back into the 60s through the second half of the
week. Winds are forecast to weaken once again over the upcoming
weekend as another, slightly weaker, cold front approaches the
state.

Aviation
Waves of MVFR showers with embedded ifr visibilities are
affecting kauai and will spread to oahu this morning, located
within a larger prefrontal convergence band. This band will shift
eastward through the day, affecting maui county later in the
afternoon evening. Isolated thunderstorms are embedded within the
convergence band as well. In the meantime, afternoon showers will
develop across maui county big island, with most activity
initially focused across south and southeastern facing sections.

The cold front will follow from west to east tonight Tuesday,
shifting winds northwest and bringing more prevailingVFR
ceilings.

Marine
The background flow will be out of the south and southwest today
as a front approaches from the northwest. The front is expected
to reach the kauai waters by this evening, then continue down the
island chain, reaching the big island waters Tuesday. Heavy
showers and thunderstorms will be possible along and east of the
front. Some of the thunderstorms may be strong enough to warrant
special marine warnings. Behind the front, fresh to locally
strong northerly winds are expected, but should become light to
moderate by Wednesday, and persist through the remainder of the
week.

The current northwest swell is peaking along north facing shores
right around advisory levels. Surf is high enough to warrant the
issuance of an high surf advisory for north facing shores today.

Even though this swell and associated surf will decline slightly
tonight, a bigger northwest swell on Tuesday and Wednesday will
produce surf above the advisory threshold again for north facing
shores. Therefore, the high surf advisory will run today through
Wednesday afternoon, covering both swells. The Tuesday Wednesday
swell will also boost combined seas above the 10 foot level, so a
small craft advisory will likely be needed for exposed waters. An
even larger northwest swell is forecast to arrive Friday and could
produce warning level surf along north and west facing shores.

A low east of new zealand generated a swell which will produce surf
near the advisory level along south facing shores through Monday.

The oahu surf discussion (srdhfo) will be updated this afternoon
with additional details on surf and swell.

Hfo watches warnings advisories
Flash flood watch through Tuesday afternoon for oahu-molokai-
lanai-kahoolawe-maui-big island.

High wind watch from 6 pm hst this evening through Tuesday
afternoon for big island summits.

High surf advisory for north facing shores of niihau, kauai, oahu,
molokai and maui.

Discussion... Foster
aviation... Bravender
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 46 mi51 min SSE 2.9 G 8 78°F 80°F1012 hPa
51211 47 mi69 min 80°F4 ft

Wind History for Honolulu, HI
(wind in knots)    EDIT      (on/off)   Help
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
11
AM
12
PM
1
PM
Last
24hr
SW5
G10
SW5
SW3
SW4
SW3
SW1
NW1
NE1
--
NE1
NE2
E2
NE2
E1
NE2
SE1
E2
E2
E3
SE5
G8
S6
G10
S3
G6
SE4
G8
SE6
G11
1 day
ago
E5
G13
NE9
NE7
G12
NE8
G14
NE5
G9
NE4
G8
NE2
G8
E2
E1
NE2
--
N1
NE1
S1
N1
NE1
--
SE1
W1
SW5
SW6
S6
G11
S4
G11
SE4
G8
2 days
ago
NE11
G20
NE11
G17
NE10
G23
NE9
G19
NE6
G19
NE6
G11
NE4
G8
NE4
G8
NE6
G9
NE5
G10
NE5
G9
E1
NE3
G8
E2
W2
NE4
NE3
NE7
G10
S3
NE6
G9
NE4
G9
NE6
G9
NE5
G9
NE5
G9

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lanai City, Lanai Airport, HI35 mi73 minS 1310.00 miMostly Cloudy76°F71°F85%1011.7 hPa

Wind History from HNY (wind in knots)
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
11
AM
12
PM
1
PM
2
PM
Last 24hrNW7NW5NW3SE6SE6E5CalmNE3NE3N4N6NE3S3E3E5SE3E4E4S7--S7S9S13S14
1 day agoNE20NE20NE15
G22
NE12NE13NE12NE11NE9E4E4NE4NE5E4E3NE4NE5E5E3CalmW76W7W7W10
2 days agoNE20
G27
NE21
G25
NE17
G29
NE21
G28
NE25
G33
NE21
G28
NE15
G19
NE18
G22
5NE13E7NE17NE14NE9NE5E10NE10E76NE12
G19
CalmE6NE13
G16
NE18

Tide / Current Tables for Kaumalapau, Lanai Island, Hawaii
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Kaumalapau
Click for Map
Mon -- 06:16 AM HST     2.23 feet High Tide
Mon -- 06:26 AM HST     Sunrise
Mon -- 09:48 AM HST     Moonrise
Mon -- 01:29 PM HST     0.48 feet Low Tide
Mon -- 05:57 PM HST     Sunset
Mon -- 06:06 PM HST     1.06 feet High Tide
Mon -- 09:10 PM HST     Moonset
Mon -- 11:29 PM HST     0.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.50.91.41.82.12.22.221.61.20.90.60.50.50.60.811.110.90.70.40.3

Tide / Current Tables for Kolo, Molokai Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Kolo
Click for Map
Mon -- 06:22 AM HST     2.00 feet High Tide
Mon -- 06:27 AM HST     Sunrise
Mon -- 09:49 AM HST     Moonrise
Mon -- 01:32 PM HST     0.54 feet Low Tide
Mon -- 05:58 PM HST     Sunset
Mon -- 06:12 PM HST     0.90 feet High Tide
Mon -- 09:11 PM HST     Moonset
Mon -- 11:29 PM HST     0.38 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.60.91.21.61.9221.81.51.20.90.70.60.60.60.70.80.90.90.80.60.50.4

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 (20,4,5,8)
      (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.