Page Links Change Location One Page Printer Page HELP Default setup SAVE setting RECALL saved setting

Marine Weather and Tides Halaula, HI Version 3.4

NOTICE 8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it. 8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue. 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 6:34AM

Sunset 5:41PM

Wednesday November 25, 2020 12:11 AM HST (10:11 UTC)

Moonrise 3:08PM

Moonset 2:50AM

Illumination 76%

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.

---

---

7 Day Forecast for Marine Location Near Halaula, HI

   Hourly   EDIT   Help

---

Area Discussion for -

      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXHW60 PHFO 250659 CCA AFDHFO

Area Forecast Discussion . CORRECTED National Weather Service Honolulu HI 859 PM HST Tue Nov 24 2020

SYNOPSIS. A moist and unstable airmass will bring the potential for a few lingering downpours across the state through Wednesday, with a thunderstorm or two possible over the Big Island Wednesday afternoon. A more stable trade wind weather pattern will return Wednesday night and hold through the Thanksgiving Day weekend. Showers will favor windward and mauka areas during the long weekend, with a stray shower reaching leeward areas from time to time.

DISCUSSION. Currently at the surface, a trough of low pressure is located around 150 miles west of Kauai and is moving westward at around 15 mph. Meanwhile further from the islands, a 1034 mb high is centered around 1600 miles northeast of Honolulu, while a cold front is located around 1150 northwest of Kauai. The resulting gradient is producing moderate trades across the island chain this evening. Infrared satellite imagery shows a mix of high and low clouds across the state producing partly to mostly cloudy conditions. Radar imagery shows scattered showers moving into windward areas, with a few of the more substantial showers making it into leeward locales from time to time. The greatest instability has shifted south and west of the islands where the only thunderstorm activity is seen at the moment. Main short term concerns focus on the potential for heavy rainfall and thunderstorms overnight, as well as the Flash Flood headline.

High pressure northeast of the state will slide eastward and weaken over the next couple days, as a cold front approaches from the northwest. This will allow the trades to ease slightly, but they should hold at moderate levels through Thursday. The cold front will fizzle out north of the islands Thursday night and Friday, as a new high builds north of the state, and this should strengthen the trades back up to locally breezy levels. Trades should then hold at locally breezy levels through the weekend, before easing into the light to moderate range as a new front approaches from the northwest.

As for the remaining weather details, the greatest instability and deepest moisture has exited to the west of the islands, and this should lead to a decrease in the potential for heavy rainfall and thunderstorms. A few brief downpours will be possible over the next 24 hours or so, but the threat for widespread heavy rainfall and flooding has diminished considerably. Therefore the Flash Flood Watch for Maui and the Big Island has been cancelled with the evening package. The threat for thunder has diminished as well, with linger thunder chances expected to remain confined to the waters south and west of the state. The one exception is over the Big Island Wednesday afternoon, where daytime heating and terrain effects may lead to a thunderstorm or two. Elsewhere, we should see a return to a more typical trade wind shower regime.

Fairly typical trade wind weather should then prevail Wednesday night through the Thanksgiving Day weekend and into early next week. Showers will favor windward and mauka areas with a stray shower reaching leeward areas from time to time. There is the potential for some old frontal remnants and some cooler weather to move into the islands over the weekend, but details differ considerably between the GFS and ECWMF at the moment. Given the uncertainty will follow a blended forecast approach until detail become more clear.

AVIATION. Although most of the heavy showers and thunderstorms should remain out over the adjacent coastal waters overnight into Wednesday with the upper trough over the region, a few moving ashore and impacting the islands will remain possible. MVFR CIGS and VSBYS will be expected in and around any showers that develop and move through. Although most of this activity will favor windward and mountain locations, breezy trades will carry some showers into interior and leeward locations periodically.

AIRMET Sierra remains in effect for north through east sections of all islands.

AIRMET Tango for low-level mechanical turbulence remains in effect over and downwind of terrain for the entire area.

MARINE. A slight weakening of northeasterly high pressure will allow for the subtle lowering of trades through mid week. The Small Craft Advisory (SCA) has been scaled back to the typical windier waters and channels surrounding Maui County and those waters south of the Big Island through Wednesday afternoon. After a brief lull in winds late Wednesday through early Thursday, trades are expected to restrengthen and back a bit northeast from Thanksgiving into the holiday weekend in response to the passage of a late week decaying front.

Northwest swells will continue to subside through Wednesday. Low, moderate period northwest swells will arrive Wednesday and Thursday. Slightly larger northwest swells will build Friday and peak out late Saturday into Sunday. As these weekend swells subside early next week, longer period northwesterly swells emanating from a strong weekend North Pacific gale will begin arriving late Sunday. North and west-facing shore surf will again lift to double digit heights by early next week but is forecast to remain below advisory levels.

Weakening easterly trades will have eastern-facing shore surf declining and then leveling out the next few days. Other than a small bit of wrap from the declining east wind wave swell, surf along south-facing shores will remain small through the Holiday weekend.

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



DISCUSSION . Jelsema AVIATION . Gibbs MARINE . Blood

---

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
KWHH1	14 mi	53 min	ESE 2.9 G 4.1
ILOH1 - 1617760 - Hilo, HI	52 mi	53 min	SE 2.9 G 5.1	71°F	80°F		1017.5 hPa
KLIH1 - 1615680 - Kahului Bay, Maui, HI	58 mi	53 min	ENE 13 G 17

Wind History for Kawaihae, HI

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

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

12 AM

Last 24hr

NE4

--

NE5

NE3

N4 G8

NE6

NE4

NE3 G6

W3

N1

W6

SW10

W2

W4 G7

W5

NW1

--

SW2

NE3

NE3

SE3 G6

NE3

NE4

NE3

1 day ago

N5 G8

W6 G17

NW9 G12

W9 G12

NW3 G7

W10

SW7

W9 G12

W5 G10

W9

W12

NW10

W18 G23

W12 G15

W12 G15

W11

W10 G13

W10

NW3 G7

SE2

W4

W8

SW3

NE2

2 days ago

N8 G13

W11 G17

NW11 G23

W22

W11

N8 G16

W10 G14

W13 G19

W11 G15

NW14 G22

SE7 G17

W15 G20

NW18 G30

NW10 G24

W14 G17

E5 G15

W6 G12

W12 G15

NW4

NW2 G5

---

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
Bradshaw Army Air Field / Hawaii, HI	34 mi	73 min	E 6	10.00 mi	Fair	52°F	18°F	27%	1017.1 hPa

Link to 5 minute data for PHSF

Wind History from HSF (wind in knots)

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

12 AM

Last 24hr

Calm

E5

E5

NE3

E5

Calm

E6

E8

SE14 G19

SE17 G22

SE14 G21

SE15 G21

SE11 G19

SE14 G17

SE14 G20

SE8 G17

SE5

E7

Calm

E5

E3

E7

E6

E7

1 day ago

SE16 G25

E12

SE14 G18

E10

E13 G20

SE13 G21

E6

E4 G19

SE5

SE10 G18

SE15 G26

SE20 G27

SE18 G28

S13 G25

SE15 G19

SE13 G21

SE11 G20

NE9

E10

E7

E5

E4

E7

E5

2 days ago

SE21 G30

SE18 G26

E13 G26

E14 G30

SE16 G26

E15 G25

E19 G23

E19 G32

SE17 G26

SE20 G33

SE20 G32

SE17 G26

SE17 G24

SE21 G28

SE14 G19

SE9 G19

E9

SE17 G25

SE18 G26

SE19 G26

SE17 G27

SE17 G26

SE16 G25

E14 G20

---

Tide / Current Tables for Mahukona, Hawaii Island, Hawaii

   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data

---

Tide / Current Tables for Kawaihae, Big Island, Hawaii

   EDIT      (on/off)   Help   One Week of Data

---

Weather Map

       (on/off)   Help Weather Map

---

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

---

Ground Weather Radar Station Kohala, HI

   (on/off)   Help

---

Cookie Policy: This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser. Privacy Policy: I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway. 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.