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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:09AM | Sunset 6:59PM | Monday August 19, 2019 5:37 PM HST (03:37 UTC) | Moonrise 9:54PM | Moonset 9:38AM | Illumination 79% |  |
PHZ116 Kaiwi Channel- 338 Pm Hst Mon Aug 19 2019
Tonight..Northeast winds 20 knots. Wind waves 4 feet. South swell 3 feet. Isolated showers.
Tuesday..East winds 15 knots. Wind waves 5 feet. South swell 3 feet increasing to 5 feet in the afternoon. Scattered showers in the morning, then isolated showers in the afternoon.
Tuesday night..East winds 20 knots. Wind waves 5 feet. South swell 5 feet. Isolated showers in the evening, then scattered showers after midnight.
Wednesday..Northeast winds 20 knots. Wind waves 5 feet. South swell 5 feet. Isolated showers through the day.
Wednesday night..Northeast winds 20 knots. Wind waves 5 feet. South swell 4 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 4 feet. Mixed swell south 4 feet and northwest 3 feet. Isolated showers.
Thursday night..Northeast winds 15 knots. Wind waves 4 feet. South swell 3 feet in the evening. SWell northwest 3 feet. Isolated showers.
Friday..East winds 15 knots. Wind waves 4 to 5 feet. SWell northwest 3 feet. Isolated showers.
Saturday..East winds 15 knots. Wind waves 5 to 7 feet. SWell northwest 3 feet. Isolated showers.
Tonight..Northeast winds 20 knots. Wind waves 4 feet. South swell 3 feet. Isolated showers.
Tuesday..East winds 15 knots. Wind waves 5 feet. South swell 3 feet increasing to 5 feet in the afternoon. Scattered showers in the morning, then isolated showers in the afternoon.
Tuesday night..East winds 20 knots. Wind waves 5 feet. South swell 5 feet. Isolated showers in the evening, then scattered showers after midnight.
Wednesday..Northeast winds 20 knots. Wind waves 5 feet. South swell 5 feet. Isolated showers through the day.
Wednesday night..Northeast winds 20 knots. Wind waves 5 feet. South swell 4 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 4 feet. Mixed swell south 4 feet and northwest 3 feet. Isolated showers.
Thursday night..Northeast winds 15 knots. Wind waves 4 feet. South swell 3 feet in the evening. SWell northwest 3 feet. Isolated showers.
Friday..East winds 15 knots. Wind waves 4 to 5 feet. SWell northwest 3 feet. Isolated showers.
Saturday..East winds 15 knots. Wind waves 5 to 7 feet. SWell northwest 3 feet. Isolated showers.
PHZ100 338 Pm Hst Mon Aug 19 2019
Synopsis for hawaiian coastal waters.. A new surface high pressure system will build north of the state from tonight through mid-week. A front approaching from the north later this week may cause the trade winds to weaken slightly from late Thursday into Friday.
Synopsis for hawaiian coastal waters.. A new surface high pressure system will build north of the state from tonight through mid-week. A front approaching from the north later this week may cause the trade winds to weaken slightly from late Thursday into Friday.
7 Day Forecast for Marine Location Near Kaneohe, HI
Hourly EDIT Helplocation: 21.42, -157.78 debug
Area Discussion for -
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxhw60 phfo 200150 afdhfo area forecast discussion national weather service honolulu hi 350 pm hst Mon aug 19 2019 Synopsis A building ridge north of the state will maintain a trade wind pattern through the upcoming weekend. Showers will be focused over windward and mountains areas in this flow. Light to moderate trade winds will persist with periods of moderate to locally breezy trades in the middle of the week and again for the weekend. Discussion No major changes to the forecast package with the afternoon package. Have boosted pops in several areas tonight through tomorrow night based satellite and satellite derived information. Satellite derived precipitable water (pw) shows a slug of moisture to the east and southeast of the big island. Pw values exceed 1.5 inches, with pockets near 2.0 inches. The afternoon sounding from lihue has 1.21 pw and hilo has 1.11 inches. As the moisture seen on satellite moves to the west on the trade wind flow, it will bring an uptick in shower activity to the islands. The trades will focus those showers over windward and mauka areas. A surface ridge north of the islands will maintain the trade wind flow through the week. Expect an uptick in winds tomorrow and Wednesday to moderate to locally breezy conditions. There could be a small downward trend Thursday and Friday, but expecting more widespread moderate to breezy conditions for the weekend. The downward trend will be due in part to an old front northeast of the islands that will help to disrupt the trade wind flow. While the front is not expected to reach the islands, leftover moisture is expected to reach the islands on the trade wind flow. This could mean an uptick in shower activity at the end of the week. The models continue to show the bulk of that moisture staying north of kauai, but it will likely increase showers over the windward sides of kauai and possibly oahu. Beyond the weekend, the forecast continues to depict a trade wind flow which is more in line with the ECMWF depiction, as there have been several run to run differences in the gfs. Aviation An elongated surface high to the north of the state will act to maintain weak to moderate east northeast trades this afternoon through tonight. Thus, expect most shower activity to occur along the windward side of the islands after Sun down. Brief MVFR conditions may develop at times, mainly due to lowered visibility |
and mountain obscuration from the low clouds and showers. No airmets are currently in effect. Marine As a new surface high pressure system builds north of state from tonight through mid-week, east-northeast trade winds will gradually strengthen. Based on the latest forecast, trade winds are expected to reach the small craft advisory (sca) threshold starting Tuesday night across the typically windier waters adjacent to the islands of maui county and the big island. These sca conditions may persist over these waters through Wednesday night. A weak surface front approaching the area from the north later this week is expected to cause a slight disruption in the pressure gradient over the region. Therefore, the trade winds are forecast to weaken slightly from late Thursday through Friday. Surf along south facing shores will continue to build tonight and through the day Tuesday as the new large, long-period south- southwest peaks Tuesday night. Long-period forerunners are starting to register on the offshore buoys at NOAA buoy 51002 and 51004, with a spike in energy registered this afternoon. This should lead to advisory level surf by later tonight. Thus a high surf advisory (hsa) has been issued starting midnight tonight along south facing shores of all hawaiian islands. As this swell passed through the pacioos buoy at pago pago several days ago, it registered swell heights and energy levels slightly higher than our recent mid-july 2019 warning-level event along south facing shores. The possible limiting factor for this swell event in hawaii was that the storm was slightly more compact compared with other high surf events. We will be monitoring observations in case a high surf warning might be required during the peak of this event on Tuesday or Tuesday night. The surf may not drop below the hsa criteria along south facing shores until Thursday based on the latest guidance. Surf along north and west facing shores of the smaller islands may increase from late Wednesday through Friday as small northwest swells spread down the island chain. Small, choppy surf may trend up slightly along east facing shores later this week as the trades strengthen. Hfo watches warnings advisories High surf advisory from midnight tonight to 6 am hst Thursday for niihau-kauai windward-kauai leeward-oahu south shore-waianae coast-molokai leeward-lanai makai-kahoolawe-maui leeward west- maui central valley-leeward haleakala-kona-south big island-big island north and east. Discussion... M ballard aviation... Thomas marine... Kino |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| MOKH1 - 1612480 - Mokuoloe, HI | 1 mi | 61 min | NNE 6 G 9.9 | 82°F | 85°F | 1014.1 hPa | ||
| 51207 | 4 mi | 43 min | 82°F | 4 ft | ||||
| 51210 | 4 mi | 37 min | 82°F | 4 ft | ||||
| 51202 - Mokapu Point, HI (098) | 5 mi | 37 min | 82°F | 4 ft | ||||
| OOUH1 - 1612340 - Honolulu, HI | 9 mi | 55 min | ENE 8 G 16 | 84°F | 83°F | 1013.2 hPa | ||
| 51211 | 13 mi | 67 min | 82°F | 3 ft | ||||
| 51212 | 21 mi | 37 min | 84°F | 3 ft | ||||
| 51201 - Waimea Bay, HI (106) | 25 mi | 55 min | 78°F | 3 ft |
Wind History for Mokuoloe, HI
(wind in knots) EDIT (on/off) Help| 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 | 3 PM | 4 PM | 5 PM | |
| Last 24hr | NE G11 | E G10 | NE | E G10 | E G10 | E G8 | E G8 | E G8 | E | E G6 | E | S | S | E | E G10 | NE G10 | NE G11 | NE G11 | NE | NE G12 | N | N G11 | NE G13 | E |
| 1 day ago | E G15 | E G11 | E G10 | E G13 | NE | E G10 | E G13 | E G11 | E G10 | E G10 | E | E | SE | NE | E G10 | E G9 | E G11 | E G12 | NE G12 | NE | NE G11 | NE G11 | NE G12 | NE G13 |
| 2 days ago | E G11 | E G9 | E G14 | E G11 | E G11 | E | E | E G11 | E | E G13 | W | E G10 | E G12 | E G12 | E G12 | E G15 | E G12 | E G15 | E G12 | SE | E G12 | E G11 | E G12 | E G14 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Kaneohe, Marine Corps Air Station, HI | 2 mi | 2.7 hrs | NE 10 | 10.00 mi | A Few Clouds | 87°F | 70°F | 57% | 1013.1 hPa |
| Daniel K Inouye International Airport, HI | 9 mi | 1.7 hrs | NE 15 G 19 | 10.00 mi | Partly Cloudy | 89°F | 64°F | 43% | 1013.1 hPa |
| Wheeler Air Force Base / Oahu, HI | 14 mi | 1.7 hrs | NE 12 G 18 | 10.00 mi | A Few Clouds | 85°F | 64°F | 51% | 1012.7 hPa |
| Oahu, Kalaeloa Airport, HI | 17 mi | 1.7 hrs | Var 6 G 14 | 10.00 mi | A Few Clouds | 90°F | 64°F | 44% | 1014 hPa |
Link to 5 minute data for PHNG
Wind History from HNG (wind in knots)
| 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 | 3 PM | |
| Last 24hr | NE | NE | E | E | E | E | E | E | E | E | E | E | E | NE | E | NE | E | NE | NE | NE | NE | |||
| 1 day ago | E | E | E | E | E | NE | E | E | E | E | E | E | E | E | E | NE | NE | NE | NE | NE | NE | NE | ||
| 2 days ago | E | E | E | E | E | E | E | E | E | E G20 | E G15 | E G15 | E | E | E G17 | E | NE | E G16 | SE G15 | E |
Tide / Current Tables for Waikane, Kaneohe Bay, Oahu Island, Hawaii
EDIT Weekend mode (on/off) (on/off) Help One Week of DataWaikane
Click for Map
Mon -- 04:49 AM HST 1.59 feet High Tide
Mon -- 06:10 AM HST Sunrise
Mon -- 09:38 AM HST Moonset
Mon -- 10:47 AM HST 0.76 feet Low Tide
Mon -- 04:39 PM HST 1.95 feet High Tide
Mon -- 06:58 PM HST Sunset
Mon -- 09:53 PM HST Moonrise
Mon -- 11:50 PM HST 0.56 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 04:49 AM HST 1.59 feet High Tide
Mon -- 06:10 AM HST Sunrise
Mon -- 09:38 AM HST Moonset
Mon -- 10:47 AM HST 0.76 feet Low Tide
Mon -- 04:39 PM HST 1.95 feet High Tide
Mon -- 06:58 PM HST Sunset
Mon -- 09:53 PM HST Moonrise
Mon -- 11:50 PM HST 0.56 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| 0.6 | 0.8 | 1.1 | 1.3 | 1.5 | 1.6 | 1.5 | 1.3 | 1.1 | 0.9 | 0.8 | 0.8 | 0.9 | 1.1 | 1.4 | 1.7 | 1.9 | 1.9 | 1.8 | 1.6 | 1.3 | 1 | 0.8 | 0.6 |
Tide / Current Tables for Waimanalo, Oahu Island, Hawaii
EDIT (on/off) Help One Week of DataWaimanalo
Click for Map
Mon -- 05:20 AM HST 1.09 feet High Tide
Mon -- 06:10 AM HST Sunrise
Mon -- 09:37 AM HST Moonset
Mon -- 10:56 AM HST 0.48 feet Low Tide
Mon -- 05:10 PM HST 1.40 feet High Tide
Mon -- 06:58 PM HST Sunset
Mon -- 09:53 PM HST Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 05:20 AM HST 1.09 feet High Tide
Mon -- 06:10 AM HST Sunrise
Mon -- 09:37 AM HST Moonset
Mon -- 10:56 AM HST 0.48 feet Low Tide
Mon -- 05:10 PM HST 1.40 feet High Tide
Mon -- 06:58 PM HST Sunset
Mon -- 09:53 PM HST Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| 0.3 | 0.4 | 0.6 | 0.8 | 1 | 1.1 | 1.1 | 1 | 0.8 | 0.6 | 0.5 | 0.5 | 0.5 | 0.7 | 0.9 | 1.1 | 1.3 | 1.4 | 1.4 | 1.2 | 1 | 0.7 | 0.5 | 0.4 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
GOES 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 (23,6,7,8)
(on/off) Help
Ground Weather Radar Station Molokai, HI
(on/off) Help
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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. |