Friday, July10, 2020
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Marine Weather and Tides
Urban Honolulu, 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 5:55AMSunset 7:18PM Friday July 10, 2020 4:13 PM HST (02:13 UTC) Moonrise 11:36PMMoonset 10:57AM Illumination 69% Phase: Waning Gibbous; Moon at 20 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
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PHZ116 Kaiwi Channel- 316 Pm Hst Fri Jul 10 2020
.small craft advisory in effect through Saturday afternoon...
Tonight..East winds to 25 knots. Wind waves 7 feet. Isolated showers.
Saturday..East winds to 25 knots. Wind waves 7 feet. Isolated showers.
Saturday night..Northeast winds 20 knots. Wind waves 6 feet. Isolated showers.
Sunday..Northeast winds 20 knots. Wind waves 6 feet. Isolated showers through the day.
Sunday night..East winds 20 knots. Wind waves 6 feet. Isolated showers.
Monday..East winds 15 knots. Wind waves 5 feet. Isolated showers through the day.
Monday night..East winds 15 knots. Wind waves 5 feet. Isolated showers.
Tuesday..East winds 20 knots. Wind waves 5 to 6 feet. Isolated showers.
Wednesday..East winds 15 knots. Wind waves 5 to 6 feet. Scattered showers.
PHZ100 316 Pm Hst Fri Jul 10 2020
Synopsis for hawaiian coastal waters.. High pressure north of the state will maintain fresh to locally strong trade winds into Monday before trending down slightly.


7 Day Forecast for Marine Location Near Urban Honolulu, HI
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As of July 8 NOAA did a network migration which caused issues with this section. Sorry for the inconfience.
location: 21.29, -157.88     debug


Area Discussion for -
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FXHW60 PHFO 110148 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 348 PM HST Fri Jul 10 2020

SYNOPSIS. Breezy trade winds will continue through the weekend with moderate trades expected next week. Showers will focus over windward and mountain areas with a few reaching leeward locations. Day to day shower trends will vary as pockets of moisture move through the islands.

DISCUSSION. High pressure located far north of the area will maintain breezy trade winds into next week. Current satellite imagery depicts a field of stable stratocumulus (SC) clouds upstream of the islands riding the trades. The SC will bring cloudy skies to windward areas with showers expected mainly over the mountains tonight as the orography squeezes the moisture out of the SC.

Our large scale weather pattern looks to remain unchanged over the next several days with a high pressure ridge north of the islands, and fronts passing from west to east through the Gulf of Alaska. Trades are expected to remain breezy through the weekend with a slight weakening next week as the high shifts eastward. Showers and clouds will focus over the mountain slopes and windward areas with only brief passing showers expected over leeward locations. Some increase in showers for Kauai and Oahu is possible Sunday night into Monday as a upper trough skirts the northern part of the state. Otherwise, day to day shower trends will vary as pockets of moisture move through with the trade winds.

AVIATION. Low clouds and showers area starting to reach Oahu this afternoon, and continue to impact windward Maui and the Big Island. Expecting some of these clouds to reach the windward side of Kauai later tonight. Overall VFR conditions are expected to prevail, however some passing MVFR conditions are possible in clouds and showers.

Breezy conditions are expected to continue for the next several days. AIRMET Tango remains in effect for mechanical low level turbulence to the lee of all mountains, and will likely be in place for a while.

Not expecting a need for any additional AIRMETs at this time.

MARINE. A breezy trade wind pattern will likely hold into Monday before trending down slightly. A Small Craft Advisory (SCA) remains posted for the typically windier waters around the Big Island and Maui County, as well as for windward Maui waters and the Kaiwi Channel. The windward Maui waters and Kaiwi channel SCA goes through Saturday and the SCA for the waters around Maui County and the Big Island through Sunday. This may need to be extended into Monday.

No significant swells are due well into next week. The current small south- southwest swell will taper off tonight. A mix of background south and southeast swells will continue to produce small surf along south facing shores through next week. Trade wind swells will gradually build through today, then hold into early next week, producing choppy surf along east facing shores. Additionally, TC Cristina in the far East Pacific could produce a small moderate- period east swell the middle of next week. Surf along north facing shores will remain nearly flat through next week.

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

Small Craft Advisory until 6 PM HST Saturday for Kaiwi Channel- Maui County Windward Waters.



DISCUSSION . Morrison AVIATION . M Ballard MARINE . EATON


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OOUH1 - 1612340 - Honolulu, HI 1 mi56 min 1016.1 hPa
51211 4 mi74 min 81°F4 ft
MOKH1 - 1612480 - Mokuoloe, HI 11 mi98 min E 7 G 14 81°F 82°F1016.9 hPa
51202 - Mokapu Point, HI (098) 14 mi48 min 81°F7 ft
51210 14 mi48 min 80°F6 ft
51212 14 mi48 min 81°F3 ft
51207 15 mi48 min 80°F6 ft
51201 - Waimea Bay, HI (106) 29 mi48 min 80°F4 ft

Wind History for Honolulu, HI
(wind in knots)    EDIT      (on/off)   Help
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NE6
G14
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G10
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G9
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G12
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G10
SE7
G11
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NE7
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NE9
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G10
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G7
NE6
G13
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NE6
G17
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G16
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G13
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G10
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G15
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G18
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G10

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Daniel K Inouye International Airport, HI5 mi21 minENE 1310.00 miMostly Cloudy86°F66°F53%1015.5 hPa
Oahu, Kalaeloa Airport, HI10 mi21 minE 12 G 1810.00 miOvercast85°F68°F57%1016.4 hPa
Kaneohe, Marine Corps Air Station, HI12 mi77 minE 15 G 2010.00 miMostly Cloudy82°F70°F67%1015.5 hPa
Wheeler Air Force Base / Oahu, HI15 mi78 minE 9 G 1710.00 miOvercast82°F66°F60%1015.4 hPa

Link to 5 minute data for PHNL

Wind History from HNL (wind in knots)
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Last 24hrE17
G23
NE6NE9NE10E11
G16
E12NE9E12E10NE9NE9NE7E12
G16
NE14
G21
E13E14NE16
G21
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G21
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NE17
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G27
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1 day agoNE17
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E15E12NE11NE5NE8E7E13E8E7NE9NE6NE11NE8N4NE8NE11E11
G19
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2 days agoNE14NE11E9NE9NE10NE9NE7NE10NE10NE10E6E9NE9NE7E6NE10NE14NE11NE16
G23
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NE12
G26
NE11
G19
NE15
G23
NE18
G26

Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Fri -- 02:05 AM HST     0.17 feet Low Tide
Fri -- 05:55 AM HST     Sunrise
Fri -- 07:44 AM HST     0.84 feet High Tide
Fri -- 10:56 AM HST     Moonset
Fri -- 12:19 PM HST     0.57 feet Low Tide
Fri -- 07:01 PM HST     1.63 feet High Tide
Fri -- 07:16 PM HST     Sunset
Fri -- 11:34 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.20.20.20.40.50.70.80.80.80.70.60.60.60.70.91.11.41.61.61.61.41.10.8

Weather Map
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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 (22,6,7,8)
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Ground Weather Radar Station Molokai, HI
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weather_mapweather_map weather_map

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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 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.