Saturday, August15, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Nanawale Estates, HI

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:59AMSunset 6:49PM Saturday August 15, 2020 6:31 AM HST (16:31 UTC) Moonrise 2:37AMMoonset 4:19PM Illumination 11% Phase: Waning Crescent; Moon at 26 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
PHZ122 Big Island Windward Waters- 335 Am Hst Sat Aug 15 2020
Today..East winds 20 knots. Wind waves 6 feet. Northeast swell 4 feet. SWell southeast 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Tonight..East winds 20 knots. Wind waves 5 feet. Northeast swell 4 feet and southeast 3 feet. Scattered showers.
Sunday..East winds 15 knots. Wind waves 4 feet. Northeast swell 3 feet and southeast 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Sunday night..Northeast winds 10 knots. Wind waves 4 feet. Mixed swell northeast 3 feet and southeast 3 feet. Scattered showers.
Monday..East winds 15 knots. Wind waves 4 feet. Northeast swell 3 feet in the morning. SWell southeast 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Monday night..East winds 10 knots. Wind waves 3 feet. SWell southeast 3 feet. Scattered showers.
Tuesday..East winds 10 knots. Wind waves 3 feet. SWell southeast 3 feet. Scattered showers.
Wednesday..East winds 10 knots. Wind waves 3 feet. SWell southeast 3 feet. Scattered showers.
PHZ100 335 Am Hst Sat Aug 15 2020
Synopsis for hawaiian coastal waters.. Moderate to locally strong trade winds will continue through tonight before easing off to moderate speed. This comes as an area of low pressure passes far south of the islands. Moderate trades will last through Tuesday night before turning light to moderate.


7 Day Forecast for Marine Location Near Nanawale Estates, HI
   Hourly   EDIT   Help
location: 19.49, -154.81     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXHW60 PHFO 151336 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 336 AM HST Sat Aug 15 2020

SYNOPSIS. Breezy trade winds will prevail into tonight, then trend down Sunday through the upcoming week as high pressure to the northeast weakens. Clouds and showers will favor windward and mountain areas each day, especially through the overnight and early morning periods as pockets of moisture move through. Shower coverage may increase by the middle of the upcoming week as an upper disturbance moves into the area.

DISCUSSION. Latest surface analysis and satellite imagery showed the subtropical ridge anchored north of the islands and a weak trough moving over the western end of the state this morning from east to west. Trade wind convergence into this trough has led to a band of clouds and spotty windward showers overnight. Rain gages reflected this and showed only light accumulations over these windward areas in the past several hours.

Guidance has initialized well with the current pattern and shows the easterly trades trending up today through tonight as the aforementioned weak trough continues westward and the gradient tightens over the region between the ridge to the north and low pressure passing far to the south. Drier air trailing this weak trough combined with an upper ridge nosing westward over the region will support decreasing windward shower coverage from east to west through the weekend.

Guidance shows the pressure gradient relaxing Sunday into early next week as the area of low pressure to the south continues westward and a weakness in the subtropical ridge forms far north of the state as a backdoor front drops southward over the northern Pacific. An upper trough associated with this surface feature is forecast to drop farther south over the islands by midweek. If this materializes, a slight increase in windward shower coverage will become a possibility, especially as pockets of moisture move through. Localized sea breeze pattern can't be ruled out through the second half of the upcoming week, which would allow the showers to become focused over interior areas through the afternoon hours.

AVIATION. A band of low clouds and showers over the western end of the island chain will continue westward this morning. MVFR cigs/vsbys can be expected in windward areas as these showers move through, with VFR conditions generally prevailing in leeward areas. Drier conditions and breezy trade winds are expected to develop statewide by mid morning, then continue into tonight.

AIRMET Sierra is in effect for mountain obscuration across windward sections of Kauai and Oahu. Conditions should improve later this morning, first on Oahu, and by mid morning on Kauai.

AIRMET Tango remains in effect for moderate low level turbulence over and downwind of the terrain of Maui and the Big Island. This AIRMET will likely be expanded to the entire island chain later this morning.

MARINE. Moderate to locally strong trade winds will be blowing through the main Hawaiian Islands through tonight as the pressure gradient tightens over the islands in response to an area of low pressure passing far to the south. A Small Craft Advisory (SCA) has been posted for the typical windier waters Maui County and the Big Island through early Sunday morning. Trades may briefly bump up a notch to locally strong Monday night, then settle down to light to moderate speed by Thursday.

The northeast swell may have peaked and will be becoming smaller over the weekend, leading to diminishing surf along the north facing shores. The short period trade wind swell will result in mainly moderate surf along the east facing shores over the weekend. This swell could be buoyed by a small easterly swell generated by the former TC Elida in the eastern Pacific, especially for the eastern end of the state.

A small south- southwest swell from the south will bring surf to gradually trend up Sunday into early next week. A reinforcement swell from the same direction arrives Monday night through Tuesday, then hold through midweek before easing.

HFO WATCHES/WARNINGS/ADVISORIES. Small Craft Advisory until 6 AM HST Sunday for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.



DISCUSSION . Gibbs AVIATION . Jelsema MARINE . H Lau


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
ILOH1 - 1617760 - Hilo, HI 21 mi43 min SW 1.9 G 4.1 72°F 81°F1013.3 hPa
51206 22 mi48 min 80°F7 ft

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
Last
24hr
S3
NE2
N3
W3
N5
NE8
NE10
G13
E11
G16
SE3
G8
E8
G11
SE5
S2
G6
N1
G6
NW5
SW2
S1
W2
W2
--
N1
G4
W2
SW2
SW2
SW2
1 day
ago
SW2
NW1
N4
N4
E2
G5
NE6
NE6
G10
NE8
E7
G11
NE7
E2
G5
E3
SW2
G6
SW1
G5
SW2
SW2
SW2
S3
SW3
SW3
S2
SW3
SW1
SW3
2 days
ago
W4
SE3
W4
W4
G7
W6
N5
NE5
NE6
N4
NE6
NE4
G7
NE4
NE3
N3
SW1
SW1
S2
SW2
SE1
S2
SW3
SW3
W1
SE1

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI21 mi38 minWSW 510.00 miMostly Cloudy73°F68°F84%1014.6 hPa

Link to 5 minute data for PHTO

Wind History from HTO (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
Last 24hrSW6CalmCalmSW33NE8NE8E12E11E11
G16
S6E6SW4CalmNW3W3W5SW4CalmE4SW4SW5SW4W5
1 day agoSW3CalmN5N5SE6E6NE9E11E9E10E5E4CalmSW5SW5SW4SW5SW5SW4SW4SW6SW6SW7SW6
2 days agoSW5CalmW7NW5W74NE5NE9N85NE8N5NE3CalmSW4SW5S4SW5SW5SW4SW6SW4W7SW5

Tide / Current Tables for Hilo, Hawaii Island, Hawaii
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Hilo
Click for Map
Sat -- 12:01 AM HST     1.31 feet High Tide
Sat -- 02:37 AM HST     Moonrise
Sat -- 05:36 AM HST     0.25 feet Low Tide
Sat -- 06:00 AM HST     Sunrise
Sat -- 01:08 PM HST     2.77 feet High Tide
Sat -- 04:20 PM HST     Moonset
Sat -- 06:48 PM HST     Sunset
Sat -- 08:29 PM HST     0.52 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
1.31.21.10.80.50.30.30.40.81.21.82.32.62.82.72.421.510.70.50.60.81

Tide / Current Tables for Hilo, Hilo Bay, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Hilo
Click for Map
Sat -- 02:37 AM HST     Moonrise
Sat -- 06:00 AM HST     Sunrise
Sat -- 06:05 AM HST     0.01 feet Low Tide
Sat -- 01:34 PM HST     2.70 feet High Tide
Sat -- 04:20 PM HST     Moonset
Sat -- 06:48 PM HST     Sunset
Sat -- 08:18 PM HST     0.79 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
1.31.210.70.40.100.10.40.91.422.42.72.72.52.11.71.20.90.80.811.2

Weather Map
       (on/off)   Help Weather Map
wmap_P
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (12,3,4,5)
      (on/off)   Help

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

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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 numerous 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.