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Marine Weather and Tides Captain Cook, 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 5:48AM

Sunset 7:04PM

Monday July 13, 2020 1:03 AM HST (11:03 UTC)

Moonrise 12:34AM

Moonset 1:15PM

Illumination 45%

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 Captain Cook, HI

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Area Discussion for -

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FXHW60 PHFO 130619 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 819 PM HST Sun Jul 12 2020

SYNOPSIS. A high pressure system north of the islands will keep moderate to locally breezy trade winds in the forecast through Monday. An upper level disturbance will line up with a low level trough passing from east to west across the state. Expect increasing shower activity tonight through Monday as both system move across the state. Trade winds will decrease in strength starting on Tuesday as the high pressure center drifts further north away from the Hawaiian Islands. These lighter trades will allow light sea breezes to develop over shelters leeward areas each day lasting through the end of next week. Stronger trade winds are forecast to return by Saturday.

DISCUSSION. This evenings satellite imagery shows an upper level closed low roughly 600 miles north of the Big Island drifting slowly westward along the axis of an upper level trough. The subtropical jet stream continues to spread cirrus clouds from west to east across the islands. In the lower levels clouds continue to move in an east to west direction with the moderate to breezy trade winds. Several bands of unstable open cell cumulus clouds are shown along a low level 700 mb trough axis moving into the islands from the east. Low level convergence near this trough will link up with upper level lift from an upper level trough over the islands, increasing shower activity from east to west through Monday. Periods of wet trade wind showers remain in the forecast for the next 24 hours.

In the big picture, a high pressure system north of the Hawaiian Islands will keep moderate to locally breezy trade winds in the forecast through Monday. By Tuesday this high pressure system drifts northeast away from the islands, decreasing local wind speeds, and allowing thermally driven land/sea breezes to develop over leeward areas. This light wind speed pattern will continue through Friday. High pressure builds back in by Saturday with another increase in showers just in time for the weekend.

The forecast grids this evening look good, no evening updates are expected.

AVIATION. An elongated ridge of high pressure north of the state will maintain moderate to occasionally breezy trades across the islands tonight. Scattered to numerous showers will mainly affect windward locations and bring periods of MVFR conditions due to lowered ceilings and visibility.

AIRMET Tango remains in effect below 8000 feet for south thru west of mountains due to tempo moderate turbulence.

MARINE. High pressure north-northeast of the islands will keep fresh to strong trades in place through Monday. As a result, a Small Craft Advisory (SCA) remains posted for the typically windy waters around Maui County and the Big Island. A couple troughs of low pressure will pass by to the north of the state Tuesday through Friday, easing the trades into the light to moderate range in most areas, with fresh trades holding in the typically windier channel waters. Trades should then ramp back up to locally strong levels next weekend as high pressure strengthens far to the north of the island chain.

There will be a series of small southerly swells over the next several days that will keep south shore surf near of just above background levels. A slightly larger long period south swell may fill in Friday and Saturday. East facing shores will continue to experience short period choppy surf produced by the trade winds. A small but slightly longer period east swell produced from former tropical cyclone Cristina, may provide a slight uptick in surf heights during the late Tuesday through Thursday time frame. No other significant swells are expected.

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



DISCUSSION . Bohlin AVIATION . JT MARINE . Jelsema

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
KWHH1	40 mi	46 min	NE 4.1 G 5.1	77°F	82°F		1015.1 hPa
ILOH1 - 1617760 - Hilo, HI	51 mi	46 min	NW 6 G 7	74°F	80°F		1015.5 hPa

Wind History for Kawaihae, HI

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

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Last 24hr

NE3

NE1

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E15 G24

E16 G29

E21 G33

E18 G29

SE10 G19

SE5 G15

E13 G22

E12 G17

SE15 G23

W6 G13

NW9 G15

NW12 G18

W12 G15

W12

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SE3 G7

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NW6 G9

N5 G11

SE10 G17

NW11 G15

W13 G17

W12

NW10

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W6

NW5 G9

E3 G6

E11 G16

E14 G22

E14 G25

SE18 G26

E17 G24

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Kailua / Kona, Keahole Airport, HI	13 mi	71 min	E 4	10.00 mi	Partly Cloudy	75°F	68°F	79%	1015.4 hPa

Link to 5 minute data for PHKO

Wind History from HKO (wind in knots)

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SE5

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1 day ago

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NE16 G25

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2 days ago

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Calm

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Tide / Current Tables for Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii

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Tide / Current Tables for Kailua Kona, Big 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 (7,2,3,4)

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Ground Weather Radar Station South Shore, HI

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