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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.

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Sunrise 6:57AM

Sunset 6:32PM

Thursday February 20, 2020 8:35 AM HST (18:35 UTC)

Moonrise 5:09AM

Moonset 4:18PM

Illumination 9%

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 Urban Honolulu, HI

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Area Discussion for -

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FXHW60 PHFO 201303 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 303 AM HST Thu Feb 20 2020

SYNOPSIS. Gusty trade winds will continue today, then gradually decrease tonight through Saturday as a front approaches from the northwest. Although rainfall will focus over windward and mauka locations, strong winds will push showers into leeward areas at times as well. Winds will become light and variable by Sunday as the front nears the islands, with sea and land breezes expected statewide. Showers will favor interior and mountain areas during the day and locations near the coast at night. Trade winds are expected to return early next week, with rather wet conditions possible over the western islands as the front stalls out in this vicinity.

DISCUSSION. Currently at the surface, a 1033 mb high centered around 900 miles north-northeast of Honolulu is driving strong and gusty trade winds across the island chain early this morning. Infrared satellite imagery shows the back edge of a swath of low clouds approaching the islands from the east, with mostly cloudy skies present across much of the state at the moment. Radar imagery shows numerous showers pushing into windward areas from Maui to Kauai, with coverage beginning to diminish over windward Big Island. Considerable leeward spillover continues into leeward sections of the smaller islands, while leeward Big Island is mainly dry. Main short term concerns revolve around trade wind trends and rain chances through the remainder of the work week and into the weekend.

Strong high pressure will slide eastward and weaken slightly over the next few days as a cold front approaches from the northwest. Strong and gusty trades will continue across the island chain today, and as a result, the Wind Advisory is now in effect for most areas of the state through 6 PM this evening. The trades are expected to trend lower tonight and Friday, then shift around to the east-southeast on Saturday as the front moves closer. Light and variable winds will likely develop by late Saturday across the western islands while moderate trades hold on across the eastern end of the state. The gradient will slacken further Saturday night, allowing a land breeze pattern to develop statewide, with this sea/land breeze pattern holding in place through at least Sunday night. Model solutions are in fairly good agreement showing the front or its remnant band of moisture pushing into the western islands Monday, then stalling out in this area through the first half of next week before dissipating. As the front stalls, a new high will slide by well to the north of the island chain. Trade winds look to return Monday, with moderate to breezy trades taking hold Monday night and continuing through the middle of next week.

As for weather details, the back edge of the showery low clouds is expected to push westward through the islands over the next few hours, with a much drier airmass overspreading the island chain around or shortly after daybreak. This should bring a more typical trade wind shower pattern to the local area through Friday night, with showers favoring windward and mauka areas. A few showers will continue to spread leeward, although there will likely be a reduction in leeward shower coverage given precipitable water values dropping to around 0.75 inches.

Over the weekend, a transition over to a sea breeze/land breeze pattern will keep showers favoring areas near the coast in an east-southeast to southeast boundary layer flow at night, and interior and mauka areas during the afternoon/early evening. A transition over to a trade wind pattern will bring a return of more windward/mauka showers and the occasional leeward spillover early next week. Rather wet conditions could develop over the western islands during the first half of next week however, as the front or its remnants stall out in this vicinity.

AVIATION. Gusty easterly trades and showery conditions due to a band of moisture/clouds moving through will continue through the early morning hours today. Although most of the shower coverage has been focusing over windward sections of the islands, the strong winds are managing to carry some showers over into leeward areas as well. Satellite imagery did show much drier air trailing this band of moisture, which has already begun to push into windward areas of the Big Island. This should result in a gradual drying trend through the morning hours from east to west. Until then, MVFR ceiling and visibilities will continue for windward areas, especially in and around passing showers. The strong trades should begin to trend down later this evening and into the overnight hours tonight.

AIRMET Sierra for tempo mountain obscuration is in effect for windward sides of Kauai, Oahu, Molokai, Maui and the Big Island. This may be cancelled by mid morning as conditions gradually improve and the aforementioned drier air fills in.

AIRMET Tango remains in effect for tempo moderate low level turbulence over and downwind of the terrain.

MARINE. A strong surface high pressure system is moving steadily east far north of the state. The very tight pressure gradient south of this feature is producing strong to near-gale force easterly trade winds over Hawaiian waters, with winds reaching gale force in areas where the wind accelerates around the islands. A Gale Warning remains in effect through this afternoon for the typically windier waters adjacent to the islands of Maui County and the Big Island. A Small Craft Advisory (SCA) also remains in effect through early Friday morning for all other Hawaiian Waters. The SCA will likely be scaled back to include fewer areas as winds and seas slowly diminish from Friday through Friday night.

By this weekend, the surface high will move farther away to the east, as a front approaches the state from the northwest. This will allow the trade winds to weaken, and start to shift out of the east-southeast over most areas by Saturday. The front is expected to move into the far northwest Hawaiian offshore waters Sunday, with increasing northeasterly trade winds returning behind the front.

The strong trade winds will maintain rough, elevated surf along east facing shores through Friday. As a result, a High Surf Advisory remains in effect through Friday afternoon for east facing shores of the islands. This surf will subside over the weekend as the trade winds weaken.

The current small northwest swell will continue through this evening, then gradually lower from later tonight through Friday. A slightly larger, long-period northwest swell arriving late Friday will likely peak on Saturday, then gradually lower from Sunday through Monday. A new large northwest swell is possible early next week. Elsewhere, a series of small south and south- southwest swells will maintain small background surf along south facing shores through this weekend.

HFO WATCHES/WARNINGS/ADVISORIES. Wind Advisory until 6 PM HST this evening for Kauai-Oahu-Molokai- Lanai-Kahoolawe-Maui Windward West-Maui Leeward West-Maui Central Valley-Windward Haleakala-Leeward Haleakala-South Big Island-Big Island North and East-Kohala.

High Surf Advisory until 6 PM HST Friday for Kauai Windward-Oahu Koolau-Olomana-Molokai Windward-Maui Windward West-Windward Haleakala-South Big Island-Big Island North and East.

Gale Warning until 6 PM HST this evening for Maalaea Bay-Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.

Small Craft Advisory until 6 AM HST Friday for Kauai Northwest Waters-Kauai Windward Waters-Kauai Leeward Waters-Kauai Channel- Oahu Windward Waters-Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters-Maui County Leeward Waters-Big Island Windward Waters.



DISCUSSION . Jelsema AVIATION . Gibbs MARINE . Houston

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
OOUH1 - 1612340 - Honolulu, HI	1 mi	54 min	E 6 G 17	74°F	76°F		1022.9 hPa
51211	4 mi	66 min			76°F	4 ft
MOKH1 - 1612480 - Mokuoloe, HI	11 mi	60 min	E 16 G 21	74°F	73°F		1023.5 hPa
51202 - Mokapu Point, HI (098)	14 mi	36 min			75°F	10 ft
51210	14 mi	36 min			75°F	10 ft
51212	14 mi	36 min			77°F	4 ft
51207	15 mi	36 min			75°F	10 ft
51201 - Waimea Bay, HI (106)	29 mi	36 min			75°F	7 ft

Wind History for Honolulu, HI

(wind in knots)    EDIT      (on/off)   Help

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

5 AM

6 AM

7 AM

8 AM

Last 24hr

NE6 G11

NE7 G18

E9 G19

NE10 G21

E9 G18

E8 G26

NE7 G15

NE7 G14

NE7 G11

NE10 G21

NE5 G11

NE6 G11

NE4 G16

NE3 G8

NE8 G11

E2 G9

E5 G13

NE6 G18

NE8 G18

NE6 G17

E7 G17

NE5 G11

E6 G12

E6 G15

1 day ago

N2

NE3 G7

NW2 G5

E6 G15

E8 G13

NE4 G13

NE6

NE7 G12

E5 G11

NE5 G9

NE4 G11

E3 G8

SE5 G19

NE9 G13

NE6 G9

NE3 G8

NE5 G9

NE10 G15

NE7 G11

NE7 G12

NE6 G14

NE6 G11

E5 G16

NE3 G8

2 days ago

E5 G8

NE3 G6

E5 G11

NE8 G17

NE10 G17

NE6 G13

NE3

NE6 G12

NE6 G9

NE5 G10

NE6 G10

NE5 G10

NE4 G8

NE6 G11

NE4 G8

NE6 G12

E2 G9

NE4 G9

NE1 G14

NE5 G10

NE6 G15

NE4 G9

N1 G10

NE5 G8

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Daniel K Inouye International Airport, HI	5 mi	43 min	ENE 17 G 21	10.00 mi	A Few Clouds	74°F	55°F	54%	1022.9 hPa
Oahu, Kalaeloa Airport, HI	10 mi	43 min	E 7	10.00 mi	Fair	74°F	57°F	57%	1023.8 hPa
Wheeler Air Force Base / Oahu, HI	15 mi	1.7 hrs	ENE 14	10.00 mi	A Few Clouds	67°F	58°F	73%	1022.1 hPa

Link to 5 minute data for PHNL

Wind History from HNL (wind in knots)

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

5 AM

6 AM

7 AM

8 AM

Last 24hr

E12 G25

E17 G25

NE13 G21

E15 G29

NE13 G24

E23 G33

NE22 G34

NE23 G32

NE21 G28

NE15 G25

NE17 G25

E18 G23

NE14 G25

NE17

NE14 G19

E17 G28

NE20 G25

E16 G25

NE19 G27

NE16

E15 G24

E17 G25

NE17 G23

NE17 G21

1 day ago

NE12

NE13 G17

NE15

NE14

NE17 G24

NE17 G25

NE19 G28

NE19 G26

E17 G21

NE17 G26

NE11

3

E12 G21

3

6 G17

NE11 G18

NE12

NE13 G24

E12 G17

NE12 G19

N10

NE12

NE11

NE16 G23

2 days ago

E13 G21

NE11

NE16 G23

E15 G22

NE16 G20

NE11 G22

NE15 G21

E17

E18 G22

NE14 G20

NE19 G23

E16 G22

NE15 G23

E12 G19

NE14 G21

NE11

NE10

NE11 G15

NE8

NE14

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NE11

E15 G19

E16

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Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii

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Tide / Current Tables for Hanauma Bay, Oahu 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 (13,3,4,5)

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Ground Weather Radar Station Molokai, HI

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