Tuesday, February25, 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 6:42AMSunset 6:24PM Monday February 24, 2020 11:30 PM HST (09:30 UTC) Moonrise 7:39AMMoonset 7:34PM Illumination 3% 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
PHZ122 Big Island Windward Waters- 941 Pm Hst Mon Feb 24 2020
Rest of tonight..East winds 20 knots. Wind waves 6 feet. Northwest swell 4 feet. Isolated showers.
Tuesday..East winds 20 knots. Wind waves 6 feet. Northwest swell 6 feet increasing to 8 feet in the afternoon. Isolated showers.
Tuesday night..Northeast winds 20 knots. Wind waves 7 feet. Northwest swell 9 feet. Isolated showers in the evening, then scattered showers after midnight.
Wednesday..Northeast winds 20 knots. Wind waves 7 feet. Northwest swell 8 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Wednesday night..Northeast winds 20 knots. Wind waves 7 feet. Northwest swell 7 feet. Isolated showers in the evening, then scattered showers after midnight.
Thursday..Northeast winds 20 knots. Wind waves 6 feet. Northwest swell 6 feet. Scattered showers.
Thursday night..Northeast winds 20 knots. Wind waves 7 feet. Northwest swell 7 feet. Scattered showers.
Friday..Northeast winds 20 knots. Wind waves 7 to 8 feet. Northwest swell 7 to 8 feet. Scattered showers.
Saturday..East winds 20 knots. Wind waves 10 feet. Northwest swell 6 to 7 feet. Scattered showers.
PHZ100 941 Pm Hst Mon Feb 24 2020
Synopsis for hawaiian coastal waters.. High pressure will strengthen far northeast of the islands over the next couple days, resulting in increasing trade winds across the waters. A new and stronger high will build north of the state over the weekend, bringing near-gale to gale force winds to much of the marine area.


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 250654 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 854 PM HST Mon Feb 24 2020

SYNOPSIS. A mostly dry and pleasant trade wind pattern is expected through midweek. Clouds and showers will favor windward areas, especially through the overnight and early morning periods each day. Rainfall chances are expected to trend up Thursday through the weekend as an upper disturbance moves over the area. This combined with increasing trades will translate to a wet and windy pattern this weekend, which may continue through early next week.

DISCUSSION. The latest surface analysis showed high pressure building north of the area behind a dissipating frontal boundary stalled to the north. A return of moderate trade winds has been the result today across the state. The leading edge of a band of moisture near the stalled boundary combined with the trades are supporting scattered, mostly light, showers over the adjacent windward waters of the smaller islands this evening. Expect this general trend to hold overnight into Tuesday morning with clouds and showers favoring windward areas.

The short-term guidance remains in decent agreement and depicts a mostly dry and stable trade wind pattern continuing through midweek as high pressure builds to the north and upper heights rise. Trades will steadily increase and become breezy, especially by Wednesday. Clouds and showers will favor windward areas, especially through the overnight and early morning periods. Rainfall accumulations should remain light with precipitable water (PW) values forecast to remain around or below an inch (dry).

The extended guidance shows a pattern shift later in the week through the upcoming weekend as an upper low closes off across the state and 1040 mb high pressure sets up to the north. Increasing instability associated with lowering upper heights combined with a modest increase in moisture being drawn into the area will support increasing rainfall chances. As the pressure gradient tightens in response to the 1040 mb high, local winds will strengthen and become windy. Guidance suggests this wet and windy pattern holding into next week, which may result in localized flooding concerns where the heaviest rainfall becomes focused. Although most of the showers will focus over windward areas, some will spread into leeward sections given the strong winds expected.

AVIATION. Tonight a 1031 mb high to the north of the island chain will allow for moderate east northeast trade flow to persist. Thus, isolated to scattered showers will press up against the windward coasts and slopes. Periods of MVFR conditions may develop due to lower ceilings from the passing shower activity. Otherwise, mainly dry weather and VFR for leeward locations.

No AIRMETs are in effect at this time.

MARINE. High pressure will strengthen far northeast of the islands over the next couple days, resulting in increasing trade winds across the island chain. This in combination with an incoming large long- period northwest swell will bring Small Craft Advisory (SCA) conditions to most marine zones by late Tuesday or Tuesday night. SCA conditions will continue through the weekend and into early next week for most areas. In fact, the trades will become even stronger late in the week and over the weekend as a new and 1040+ mb high builds north of the state, with near-Gale to Gale force winds likely to develop across much of the marine area.

The current small short period northwest swell will linger through tonight. A larger long-period northwest swell will fill in Tuesday morning, peak late Tuesday and Tuesday night, then gradually lower Wednesday and Wednesday night. Current guidance continues to show surf reaching high end advisory levels with this swell, but if the swell comes in a bit higher than expected, the advisory may need to be upgraded to a warning. We will continue to closely monitor the NOAA buoys northwest of the state through the night as the swell begins to arrive.

Another long period, but slightly smaller northwest swell is expected to build Wednesday night and Thursday, peak Thursday night, then lower gradually Friday through Sunday. Advisory level surf is expected with this swell.

Short period choppy surf along east facing shores will gradually rise through the week and become rather large by the weekend due to strengthening trade winds. Advisory level surf is likely by the weekend, with warning level surf possible Sunday through early next week. There will also be a series of small background south swells through the week and on through the weekend.

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Advisory from noon Tuesday to 6 AM HST Wednesday for Waianae Coast-Oahu North Shore-Oahu Koolau-Molokai-Maui Windward West-Maui Central Valley-Windward Haleakala.

High Surf Advisory from 6 AM Tuesday to 6 AM HST Wednesday for Niihau-Kauai Windward-Kauai Leeward.

Small Craft Advisory until 6 PM HST Wednesday for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.

Small Craft Advisory from 6 AM Tuesday to 6 PM HST Wednesday for Kauai Northwest Waters-Kauai Windward Waters-Kauai Leeward Waters-Kauai Channel-Oahu Windward Waters-Oahu Leeward Waters- Kaiwi Channel-Maui County Windward Waters.



DISCUSSION . Gibbs AVIATION . Thomas MARINE . Jelsema


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 SSW 1.9 G 2.9 68°F 77°F1021.4 hPa
51206 22 mi45 min 76°F6 ft

Wind History for Hilo, Hilo Bay, Kuhio Bay, 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
SW2
SW3
SW1
G4
SW2
SW2
S1
S2
G5
S2
G5
S2
S2
SE3
G7
S7
G11
SE7
G14
SE7
G12
E8
G11
E5
G10
E6
N3
N1
W5
W2
W1
SW1
SW1
1 day
ago
SW2
SW1
SW2
S1
G4
S2
SW2
SW2
SW1
G4
SW2
S4
SE6
SE7
G13
SE11
G15
SE12
G17
SE10
G16
E10
G14
SE10
G14
SE6
G10
SE3
S1
S1
SW1
S1
SW2
2 days
ago
S2
W4
SW2
G6
W3
SW1
G4
S2
G5
SE4
G7
SE6
G12
E7
G12
SE8
G12
SE10
G14
SE6
G11
SE7
G10
SE4
G8
SW1
SW1
SW2
SW3
SW2
G5

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 410.00 miFair68°F60°F76%1022.9 hPa

Link to 5 minute data for PHTO

Wind History from HTO (wind in knots)
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 24hrSW4SW6SW6SW7SW6SW5S6SW4SW6S4SW5SE8SE11SE9E11E10E9E7NE5NW4NW4W3SW3W4
1 day agoSW5S5SW5SW7SW8SW8SW5SW6SW4S4SE9SE11E13E15
G22
SE14E13
G18
SE9E11SE6CalmS3S3SW3SW3
2 days agoSW5SW7CalmSW3W6SW5S7SW7W5S6S6SE6SE10SE10E12SE14SE9SE10SE9SW4CalmCalmSW4SW3

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Honuapo
Click for Map
Tue -- 04:46 AM HST     2.26 feet High Tide
Tue -- 06:44 AM HST     Sunrise
Tue -- 08:15 AM HST     Moonrise
Tue -- 11:33 AM HST     0.21 feet Low Tide
Tue -- 05:09 PM HST     1.64 feet High Tide
Tue -- 06:26 PM HST     Sunset
Tue -- 08:25 PM HST     Moonset
Tue -- 10:58 PM HST     0.30 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
0.50.91.41.92.22.32.11.71.30.80.50.20.20.40.81.21.51.61.61.310.70.40.3

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 (4,6,7,8)
      (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.