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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 6:10AM | Sunset 7:00PM | Monday August 19, 2019 4:59 AM HST (14:59 UTC) | Moonrise 10:01PM | Moonset 9:46AM | Illumination 84% |  |
PHZ110 Kauai Northwest Waters- 344 Am Hst Mon Aug 19 2019
Today..East winds 15 knots. Wind waves 4 feet. South swell 3 feet in the afternoon. Isolated showers through the day.
Tonight..East winds 20 knots. Wind waves 4 feet. South swell 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Tuesday..East winds 20 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..East winds 20 knots. Wind waves 5 feet. South swell 5 feet. SWell northwest 3 feet. Isolated showers through the day.
Wednesday night..East winds 20 knots. Wind waves 5 feet. Mixed swell south 3 feet and northwest 3 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 4 feet. Mixed swell south 3 feet and northwest 3 feet. Scattered showers.
Friday..East winds 15 knots. Wind waves 3 feet. SWell northwest 3 feet. Scattered showers.
Today..East winds 15 knots. Wind waves 4 feet. South swell 3 feet in the afternoon. Isolated showers through the day.
Tonight..East winds 20 knots. Wind waves 4 feet. South swell 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Tuesday..East winds 20 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..East winds 20 knots. Wind waves 5 feet. South swell 5 feet. SWell northwest 3 feet. Isolated showers through the day.
Wednesday night..East winds 20 knots. Wind waves 5 feet. Mixed swell south 3 feet and northwest 3 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 4 feet. Mixed swell south 3 feet and northwest 3 feet. Scattered showers.
Friday..East winds 15 knots. Wind waves 3 feet. SWell northwest 3 feet. Scattered showers.
PHZ100 344 Am Hst Mon Aug 19 2019
Synopsis for hawaiian coastal waters.. A surface ridge north of the islands will weaken and shift south today. 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 Thursday into Friday.
Synopsis for hawaiian coastal waters.. A surface ridge north of the islands will weaken and shift south today. 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 Thursday into Friday.
7 Day Forecast for Marine Location Near Haena, HI
Hourly EDIT Helplocation: 22.2, -159.68 debug
Area Discussion for -
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxhw60 phfo 191341 afdhfo area forecast discussion national weather service honolulu hi 341 am hst Mon aug 19 2019 Synopsis A ridge of high pressure north of the state will keep trade winds blowing through the weekend. The trades will strengthen a bit during the middle of the work week, and again next weekend, otherwise light to moderate trades will prevail. Showers will favor windward and mauka areas, particularly during the overnight and early morning hours. A bit of an increase in shower activity is expected tonight through Tuesday night, particularly across windward sections of maui county and the big island. A bit more showery weather is also expected Thursday night through Friday night, as a front approaches from the north. Otherwise fairly dry trade wind weather will prevail. Discussion Currently at the surface, a east to west oriented ridge of high pressure is located around 325 miles north of kauai. The resulting gradient is producing light to moderate trade winds across the island chain early this morning. Infrared satellite imagery shows clear to partly cloudy skies in place in most areas, with some more extensive cloud cover lingering over leeward sections of the big island. Radar imagery shows a few light showers moving into windward areas, with mainly rain free conditions in leeward sections. Main short term concerns revolve around rain chances and trade wind trends over the next few days. A ridge of high pressure will remain north of the state through the forecast period, keeping trade winds blowing across the island chain. Light to moderate trades will continue through Tuesday night, although we should see a slight increase in trade wind speeds Monday night through Tuesday night as a weak trough of low pressure slides by to the south of the islands. Generally dry, stable trade wind weather will prevail today, with light showers mainly affecting windward and mauka areas. With the trough sliding by south of the state, we should see an increase in trade wind showers tonight through Tuesday night, particularly across windward sections of maui county and the big island. Drier more stable conditions along with moderate to locally breezy trade winds are expected to return Wednesday through Thursday, with windward and mauka areas remaining the main shower targets. A digging upper level trough north of the state in the vicinity of 30n, will drive a frontal boundary southward toward the islands Thursday night through Friday night, easing the trade winds back into the moderate range. Although the front isn't expected to make it southward into the state, elevated inversion heights and an increase in boundary layer moisture should bring more trade wind showers to the islands for the tail end of the work week as well. High pressure will then build northeast of the state next weekend, with deep layer ridging stabilizing the airmass over the islands as the upper level trough retrogrades westward. As a result, we should see a return of fairly dry trade wind weather and moderate to locally breezy conditions. Aviation Light to moderate trades winds will continue through the period. |
Clouds and showers will favor windward and mountain locations, mainly through the overnight and early morning hours. Mostly dry conditions will prevail over leeward areas, with the exception being over the big island where clouds and showers form (best coverage through the afternoon and evening hours). Brief periods with MVFR CIGS and vsbys will be possible in and around showers. No airmets are currently in effect. Marine A nearly east to west oriented surface ridge located about 300 nm north of lihue is forecast to weaken and shift southward later today. This will result in light to moderate northeast trade winds across the hawaiian coastal waters. 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 Thursday through Friday. Surf along south facing shores will remain small early today, with mainly background swell energy from the southwest and southeast. An upward trend in surf is anticipated beginning later today as a new large, long-period south swell begins to spread across the hawaiian waters. Surface analysis charts showed a compact 956 mb storm-force low southeast of new zealand early last week, which produced a captured fetch aimed toward hawaii's swell window. Data from scatterometer passes confirmed an area of storm-force winds aimed northward during this time period. In addition, altimeter passes within this area showed seas ranging from 35 to 42 feet. This swell has already moved through the nearshore pacioos buoy at pago pago, which showed seas and energy levels that were 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. Expect a high surf advisory (hsa) to be issued for south facing shores starting tonight. 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. The small west swell associated with recent tropical cyclones in the northwest pacific will steadily trend down today. 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 None. Discussion... Jelsema aviation... Gibbs marine... Houston |
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 |
| 51208 | 8 mi | 59 min | 4 ft | |||||
| NWWH1 - 1611400 - Nawiliwili, HI | 24 mi | 65 min | WSW 4.1 G 6 | 73°F | 86°F | 1015 hPa | ||
| 51201 - Waimea Bay, HI (106) | 91 mi | 47 min | 78°F | 3 ft |
Wind History for Nawiliwili, HI
(wind in knots) EDIT (on/off) Help| 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 | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | |
| Last 24hr | W | W | W | SW | NE G11 | NE G12 | NE G13 | E G12 | E | NE G11 | NE G13 | NE G13 | NE G10 | NE G11 | NE | NE | W | W | W | W G6 | W | SW | W | W |
| 1 day ago | NE G12 | E G12 | E G15 | E | E G15 | E G14 | E | E | E | NE G15 | NE G14 | NE G13 | NE G13 | NE G13 | NE | NE G11 | NE G15 | NE G12 | NE G13 | NE | NE G13 | NE G11 | NE G9 | W |
| 2 days ago | NE G16 | NE G16 | NE G20 | E G23 | NE G12 | E G21 | E | E G16 | E G16 | E G15 | NE G16 | NE G14 | NE G14 | NE | NE | NE G9 | NE G12 | NE G12 | NE G12 | NE G10 | E G16 | E G16 | E G14 | NE G12 |
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 |
| Kekaha, Pacific Missile Test Facility Barking Sands, HI | 10 mi | 63 min | E 4 | 10.00 mi | Fair | 76°F | 62°F | 62% | 1014.4 hPa |
| Lihue, Lihue Airport, HI | 23 mi | 66 min | NE 7 | 10.00 mi | Partly Cloudy | 80°F | 71°F | 74% | 1014.9 hPa |
Link to 5 minute data for PHBK
Wind History from HBK (wind in knots)
| 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 | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | |
| Last 24hr | E | E | E | E | NW | NW | NW | NW | W | W | W | SW | S | E | N | Calm | Calm | E | NE | E | ||||
| 1 day ago | E | E | E | E | SW | NW | N | NW | NW | W | W | SW | SW | S | NE | E | E | E | E | E | E | E | ||
| 2 days ago | E | E | Calm | W | W | W | NW | NW | W | W | W | NW | NW | E | E | E | E | E | E | E |
Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
EDIT Weekend mode (on/off) (on/off) Help One Week of DataHanalei Bay
Click for Map
Mon -- 05:07 AM HST 1.29 feet High Tide
Mon -- 06:16 AM HST Sunrise
Mon -- 09:44 AM HST Moonset
Mon -- 10:18 AM HST 0.56 feet Low Tide
Mon -- 04:57 PM HST 1.65 feet High Tide
Mon -- 07:06 PM HST Sunset
Mon -- 10:00 PM HST Moonrise
Mon -- 11:21 PM HST 0.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 05:07 AM HST 1.29 feet High Tide
Mon -- 06:16 AM HST Sunrise
Mon -- 09:44 AM HST Moonset
Mon -- 10:18 AM HST 0.56 feet Low Tide
Mon -- 04:57 PM HST 1.65 feet High Tide
Mon -- 07:06 PM HST Sunset
Mon -- 10:00 PM HST Moonrise
Mon -- 11:21 PM HST 0.36 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 |
| 0.4 | 0.6 | 0.8 | 1.1 | 1.2 | 1.3 | 1.2 | 1.1 | 0.9 | 0.7 | 0.6 | 0.6 | 0.7 | 0.9 | 1.2 | 1.4 | 1.6 | 1.7 | 1.6 | 1.4 | 1 | 0.7 | 0.5 | 0.4 |
Tide / Current Tables for Waimea Bay, Kauai Island, Hawaii
EDIT (on/off) Help One Week of DataWaimea Bay
Click for Map
Mon -- 12:32 AM HST 0.27 feet Low Tide
Mon -- 06:15 AM HST 0.99 feet High Tide
Mon -- 06:17 AM HST Sunrise
Mon -- 09:45 AM HST Moonset
Mon -- 11:58 AM HST 0.43 feet Low Tide
Mon -- 06:05 PM HST 1.27 feet High Tide
Mon -- 07:06 PM HST Sunset
Mon -- 10:01 PM HST Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 12:32 AM HST 0.27 feet Low Tide
Mon -- 06:15 AM HST 0.99 feet High Tide
Mon -- 06:17 AM HST Sunrise
Mon -- 09:45 AM HST Moonset
Mon -- 11:58 AM HST 0.43 feet Low Tide
Mon -- 06:05 PM HST 1.27 feet High Tide
Mon -- 07:06 PM HST Sunset
Mon -- 10:01 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 | 0.3 | 0.4 | 0.6 | 0.8 | 0.9 | 1 | 1 | 0.9 | 0.7 | 0.6 | 0.5 | 0.4 | 0.5 | 0.6 | 0.8 | 1 | 1.2 | 1.3 | 1.2 | 1.1 | 0.9 | 0.7 | 0.5 |
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 (10,2,3,4)
(on/off) Help
Ground Weather Radar Station Kauai, HI
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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. |