Thursday, May25, 2017 L-36.com


Marine Weather and Tides
Holualoa, 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 5:40AMSunset 6:54PM Wednesday May 24, 2017 7:03 PM HST (05:03 UTC) Moonrise 4:59AMMoonset 6:07PM Illumination 0% Phase: New Moon; Moon at 29 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
PHZ123 Big Island Leeward Waters- 311 Pm Hst Wed May 24 2017
.small craft advisory in effect through early Thursday morning...
Tonight..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 5 feet. Haze through the night. Isolated showers through the night.
Thursday..West of the big island...winds variable less than 10 knots becoming west 10 knots in the afternoon. NEar south point...northeast winds 15 knots. Wind waves 4 feet. Haze. Isolated showers.
Thursday night..West of the big island...south winds 10 knots in the evening becoming variable less than 10 knots. NEar south point...northeast winds 15 knots. Wind waves 4 feet. Isolated showers in the evening. Haze through the night.
Friday..North winds 10 knots. Wind waves 2 feet or less. SWell south 3 feet. Isolated showers in the morning. Haze through the day.
Friday night..Winds variable less than 10 knots west of the big island...east 10 knots near south point. Wind waves 4 feet. SWell south 3 to 4 feet. Haze through the night. Isolated showers through the night.
Saturday..Winds variable less than 10 knots west of the big island...east 10 knots near south point. Wind waves 4 feet. SWell south 5 feet. Haze. Isolated showers.
Saturday night..Winds variable less than 10 knots west of the big island...east 15 knots near south point. Wind waves 4 feet. SWell south 4 to 5 feet. Haze through the night. Scattered showers in the evening. Isolated showers after midnight.
Sunday..Winds variable less than 10 knots west of the big island...east 15 knots near south point. Wind waves 4 feet. SWell south 3 to 4 feet. Haze. Scattered showers.
Monday..Winds variable less than 10 knots west of the big island...east 15 knots near south point. Wind waves 4 to 5 feet. Haze. Scattered showers.
PHZ100 311 Pm Hst Wed May 24 2017
Synopsis for hawaiian coastal waters.. High pressure well north of the state will drive trade winds through Friday which will then weakening through the holiday weekend.

7 Day Forecast for Marine Location Near Holualoa, HI
   Hourly   EDIT   Help
location: 19.65, -156     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 250203
afdhfo
area forecast discussion
national weather service honolulu hi
403 pm hst Wed may 24 2017

Synopsis
Breezy trades will persist today, pushing clouds and showers
across windward areas. Winds will gradually weaken through the
second half of the week, becoming light and variable through the
memorial day weekend. Daytime sea breezes and nighttime land
breezes will take over this weekend and bring warm and humid
weather with possible vog. A weak upper trough will pass over the
state this weekend and may provide some enhancement to afternoon
showers.

Discussion
Breezy trade winds have been pushing an old frontal boundary over
windward kauai through the day bringing showers and moderate
rainfall. Showers will continue overnight on kauai and increase
over windward oahu as those same showers affecting kauai sag
south. The boundary will continue bringing showers to the western
end of the state into Thursday before finally dissipating tomorrow
night.

A strong high pressure system centered far NW of the islands is
providing the breezy trade winds over the state. Trades will
weaken tonight and tomorrow as a surface low forms to the ne,
diminishing the pressure gradient over the state. Winds will
remain light and variable through the weekend as an approaching
front from the NW turns the synoptic scale winds out of the se.

The light SE flow will allow for afternoon sea breezes and
nighttime downslope winds to prevail over the islands from
Saturday into early next week.

Windward and mountain areas will see the majority of showers
through Friday, but sea breezes over the weekend will bring
passing afternoon showers to interior and leeward areas. A weak
upper level low will bring some instability to the atmosphere
Saturday and Sunday. The instability will enhance rainfall,
allowing for some isolated heavy showers to occur.

The light SE flow will bring volcanic haze, or vog, up over the
smaller islands by Sunday and linger into the beginning of next
week. The light winds will also bring hot and humid conditions for
the memorial day weekend.

Aviation
Airmet tango continues for mechanical turbulence to the lee of the
mountains due to the breezy trade winds. Expect the turbulence to
continue through tonight. Winds are expected to continue to
decline over the next couple of days.

Clouds and showers continue to impact kauai and oahu this
afternoon and have made little progress southward. Expect these
clouds and showers to continue to bring periods of MVFR
conditions. As such, airmet sierra continues for mountain
obscuration. Remaining areas should remainVFR through the first
part of the night.

Marine
The latest surface analysis showed a large area of high pressure
encompassing much of the northern pacific. The high pressure is
driving moderate to fresh trade winds over the state. A small
craft advisory (sca) is in effect for locally strong trades in
the typical windy zones around maui county and the big island
through tonight, and should begin to taper off Thursday.

Surf along north facing shores will steadily trend down tonight
as the north, short period swell declines. For the long range,
models are hinting at another moderate north northwest (340 deg)
swell filling in early next week due to a low tracking east of the
date line over the weekend and deepening as it passes well north
of the state on Monday.

Surf along south facing shores is expected to maintain through
Thursday night. The largest south swell this season is forecast
to fill in Friday, peak Friday night through Saturday night, then
slowly ease into early next week. A high surf advisory for south
facing shores will be likely beginning Friday through memorial day
weekend, before steadily easing into early next week.

In addition to the expected advisory-level surf through the
weekend along south facing shores, coastal flooding is anticipated
due to a combination of record level spring (king) tides
(especially for maui county and oahu) and large surf. See the
special weather statement on our website for more details.

Similar to the april 28th through may 1st weekend, when the
highest tides on record were reported for honolulu, impacts will
include beach flooding and standing water on roadways and low-
lying areas near the coast around the times of high tides each day
through the weekend.

The following are the daily high tide times for honolulu which
will correspond to the maximum coastal impact:
5 25 Thursday 4:21 pm hst 2.4 feet
5 26 Friday 5:07 pm hst 2.5 feet (south shore surf expected)
5 27 Saturday 5:56 pm hst 2.4 feet (south shore surf expected)
5 28 Sunday 6:47 pm hst 2.3 feet
5 29 Monday 7:40 pm hst 2.1 feet
for more detailed information on surf for oahu, see the latest
collaborative nearshore swell and wind forecast that was issued
this afternoon (

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
KWHH1 28 mi64 min WSW 6 G 8.9 79°F 80°F1014.8 hPa (-0.0)
ILOH1 - 1617760 - Hilo, HI 50 mi64 min NE 5.1 G 7 80°F 78°F1016 hPa (-0.0)
KLIH1 - 1615680 - Kahului Bay, Maui, HI 90 mi64 min NNE 18 G 21 77°F 80°F1016.3 hPa (+0.4)

Wind History for Kawaihae, HI
(wind in knots)    EDIT      (on/off)   Help
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
3
PM
4
PM
5
PM
6
PM
Last
24hr
W6
G12
SW5
SE2
SW3
G7
NW2
NW2
NE2
E2
G5
E8
G13
NE5
G13
E10
G18
NE15
G22
E13
G21
E3
G9
NW9
G12
NW10
W9
SW8
G11
SW10
SW11
G14
SW10
G14
SW8
G11
SW8
G12
SW6
G9
1 day
ago
SW8
W11
G14
SW5
G9
W6
NE1
G5
W7
SE10
G15
S12
G24
SE15
G24
E14
G22
E8
G13
SE11
G22
SE12
G19
E14
G23
E9
G17
E8
G14
SE11
G18
W11
G17
W13
NW9
NW9
G13
W11
G15
W14
G19
SW10
G13
2 days
ago
E11
G21
NE1
G5
NE8
G13
E14
G24
NE11
G18
E19
G24
W10
SW7
W9
SW8
G11
SW10
W12
W10
W6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI0 mi71 minS 910.00 miMostly Cloudy81°F66°F61%1014.6 hPa

Wind History from HKO (wind in knots)
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
3
PM
4
PM
5
PM
6
PM
7
PM
Last 24hrSE7E7E11NE13NW8N4S4SE8E8E4E5NE6CalmW7S9SW10S10SW10SW9SW9SW10SW9S9S9
1 day agoNE14N9NE12NE6NE8E33NE5NE4NE5NE6CalmSE7S7SW9S9SW7W8SW6SW8S10S10S11SE5
2 days agoCalmNE15N14NE11
G14
NE12NE16
G20
NE9N3CalmCalmNE7N5N5NW8N16
G21
NW16E6
G21
--S13S13S10S9S10S9

Tide / Current Tables for Kailua Kona, Big Island, Hawaii
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Kailua Kona
Click for Map
Thu -- 03:04 AM HST     1.01 feet High Tide
Thu -- 05:45 AM HST     Sunrise
Thu -- 05:52 AM HST     Moonrise
Thu -- 08:52 AM HST     -0.33 feet Low Tide
Thu -- 09:46 AM HST     New Moon
Thu -- 04:00 PM HST     2.43 feet High Tide
Thu -- 06:56 PM HST     Sunset
Thu -- 07:12 PM HST     Moonset
Thu -- 11:00 PM HST     0.05 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.70.910.90.70.40-0.3-0.3-0.20.20.71.41.92.32.42.321.50.90.50.20

Tide / Current Tables for Kawaihae, Big Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Kawaihae
Click for Map
Thu -- 03:27 AM HST     1.23 feet High Tide
Thu -- 05:44 AM HST     Sunrise
Thu -- 05:51 AM HST     Moonrise
Thu -- 09:14 AM HST     -0.33 feet Low Tide
Thu -- 09:46 AM HST     New Moon
Thu -- 04:21 PM HST     2.75 feet High Tide
Thu -- 06:56 PM HST     Sunset
Thu -- 07:12 PM HST     Moonset
Thu -- 11:15 PM HST     0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.711.21.210.60.2-0.1-0.3-0.30.10.61.322.52.72.72.41.81.20.70.20.1

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 (1,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Kohala, 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.