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Marine Weather and Tides Princeville, HI Version 3.4

NOTICE 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. 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

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Sunrise 6:28AM

Sunset 6:06PM

Friday October 18, 2019 2:03 PM HST (00:03 UTC)

Moonrise 10:04PM

Moonset 10:54AM

Illumination 72%

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.

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7 Day Forecast for Marine Location Near Princeville, HI

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Area Discussion for -

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Fxhw60 phfo 181945 afdhfo area forecast discussion national weather service honolulu hi 945 am hst Fri oct 18 2019 Synopsis Trade winds will continue over the islands through the weekend and into next week, periodically delivering clouds and showers to windward areas, although fewer showers are expected this weekend. Discussion To summarize, trade winds will prevail over the islands through the next week, albeit with some variations in speed, and some subtle variations in direction. The somewhat showery weather pattern of the last couple of days should trend a little drier over the weekend as a low aloft continues to distance itself from the islands. To elaborate, high pressure to the distant northeast of the islands will drift east the next couple of days, move little for a couple of days, and then drift toward the north in about 5 to 7 days from now. This will place the islands on the southwest periphery of the high's circulation, meaning that the prevailing moderate to locally breezy easterly trade winds will be occasionally weakened and somewhat veered to the east-southeast, especially on the western end of the island chain. This effect will be most pronounced when a front passes north of the islands Sunday Monday, and potentially again toward the end of next week. Water vapor imagery shows a broad trough aloft to the northwest of the islands, with early morning soundings showing an elevated subsidence inversion based between 8 and 10 thousand feet. Radar shows quite a few showers soaking windward areas, falling from open- celled showery cumulus. A trend toward fewer trade showers is expected over the weekend as the low aloft drifts away, a mid-level ridge builds nearby, and incoming pwat diminishes slightly. An increase in trade winds early next week may bring a subtle increase in windward shower coverage, but significant changes are not expected as moderate trades prevail. Long range guidance indicates the potential for much lighter winds in about a week, as the high weakens and a trough low develops north of the islands. Aviation Moderate to locally breezy trade wind flow will persist through Saturday. Ragged clouds and scattered light showers will focus mainly across windward areas, with some increase in coverage overnight. Afternoon sea breezes across leeward big island will be

weak, but sufficient for some cumulus development and a few showers possible late this afternoon and early evening. No airmets are in effect or anticipated at this time. Brief MVFR ceilings and visibilities are possible in showers. Otherwise,VFR conditions will prevail all areas. Marine High pressure northeast of the state will maintain the fresh to strong easterly trade winds through tomorrow afternoon. The small craft advisory (sca) continues through tomorrow afternoon for the typical windier waters near maui county and the big island. As a front moves closer to the state from the north late Saturday night, winds are expected to shift to the east-southeast, particularly over the southern end of the state. The front is expected to stay north of the islands, and will likely weaken the winds over the western islands. Expecting winds to shift back to a more easterly direction Monday. Surf is expected to remain below advisory levels through the forecast period. A combination of a west-northwest and north swell will hold surf along north facing shores. The north swell is expected to fade later today. A new small long-period swell expected Saturday will help maintain the surf along exposed shores. A gale low is expected to develop near the kurils Saturday night into Sunday, and then track to the east toward the date line Sunday into Monday. This would generate a northwest swell that could reach the islands late next week. A recent storm-force low far southeast of new zealand could bring a long-period south swell that would peak over the weekend, and then fade into early next week. The fresh to locally strong trade winds will maintain rough surf along east facing shores through tomorrow. As the winds weaken Sunday, expect some improvements. Hfo watches warnings advisories Small craft advisory until 6 pm hst Saturday for maalaea bay- pailolo channel-alenuihaha channel-big island leeward waters-big island southeast waters. Discussion... Birchard aviation... Ts marine... M ballard

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
NWWH1 - 1611400 - Nawiliwili, HI	20 mi	51 min	ENE 13 G 16	81°F			1017.6 hPa
51201 - Waimea Bay, HI (106)	82 mi	57 min			77°F	6 ft
51WH0 - WHOTS - Woods Hole Ocean Time-series	87 mi	93 min	E 14	81°F	81°F		1018.2 hPa	72°F

Wind History for Nawiliwili, HI

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NE10 G14

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NE9 G12

NE13 G16

NE10 G15

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E18 G22

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E14 G17

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NE13 G17

E14 G18

NE10

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NE7 G10

NE8 G11

NE2 G5

E15 G24

NE4 G8

E11 G14

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NE12 G15

E14 G18

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NE11 G15

N11 G15

NE12 G16

NE5 G8

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NE11 G15

NE8 G12

N5 G8

NW3

NE8 G11

NE6

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W6 G9

E7 G11

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NE11 G14

NE4 G8

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Lihue, Lihue Airport, HI	18 mi	70 min	ENE 14	10.00 mi	Mostly Cloudy	83°F	73°F	74%	1017.9 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI	19 mi	67 min	N 9	10.00 mi	Overcast	84°F	72°F	67%	1017.1 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)

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E12

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NE16 G20

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Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii

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Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii

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Weather Map

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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

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Wind Forecast for (20,4,5,8)

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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.