Tuesday, March26, 2019 L-36.com


Marine Weather and Tides
Hawi, HI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:23AMSunset 6:39PM Tuesday March 26, 2019 12:02 AM HST (10:02 UTC) Moonrise 12:00AMMoonset 10:58AM Illumination 71% 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
    EDIT      (on/off)   Help
PHZ121 Alenuihaha Channel- 927 Pm Hst Mon Mar 25 2019
.small craft advisory in effect through early Tuesday morning...
Rest of tonight..Northeast winds to 25 knots. Wind waves 8 feet. North swell 5 feet. Isolated showers.
Tuesday..East winds 20 knots. Wind waves 6 feet. North swell 5 feet. Isolated showers.
Tuesday night..East winds 15 knots. Wind waves 5 feet. North swell 4 feet. Isolated showers.
Wednesday..East winds 10 knots in the morning becoming variable less than 10 knots. Wind waves 3 feet. North swell 4 feet. Isolated showers.
Wednesday night..Winds variable less than 10 knots becoming west 10 knots after midnight. Wind waves 3 feet in the evening then 2 feet or less. Northwest swell 5 feet. Isolated showers.
Thursday..Northwest winds 10 knots. Wind waves 2 feet or less. Northwest swell 6 feet. Isolated showers.
Thursday night..Northeast winds 15 knots. Wind waves 4 feet. Northwest swell 6 feet. Scattered showers.
Friday..Northeast winds 20 knots. Wind waves 4 to 5 feet. Northwest swell 6 to 8 feet. Isolated showers.
Saturday..Northeast winds 20 knots. Wind waves 4 feet. Northwest swell 7 to 8 feet. Slight chance of showers.
PHZ100 927 Pm Hst Mon Mar 25 2019
Synopsis for hawaiian coastal waters.. High pressure to the north of the state will shift southeast and weaken through Wednesday while a front approaches from the northwest. The front will move into the islands Thursday, then slowly dissipate across the eastern islands through Saturday.


7 Day Forecast for Marine Location Near Hawi, HI
   Hourly   EDIT   Help
location: 20.41, -156.09     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 260633
afdhfo
area forecast discussion
national weather service honolulu hi
833 pm hst Mon mar 25 2019

Synopsis
A weakening high pressure system north of the islands will track
southeastward as trade wind speeds decreasing on Tuesday. A cold
frontal system approaching the hawaiian islands from the
northwest on Tuesday will break down the ridge north of the state
setting up light winds lasting through the weekend. Clouds and
showers from this front will move into kauai late Wednesday night
with unsettled weather slowly spreading southeast down the rest of
the island chain from Thursday into Friday. Expect lingering unsettled
showers over the windward sections of maui and the big island this
weekend.

Discussion
This evenings GOES satellite imagery shows a large band of clouds
and showers lingering over and north of kauai. Periods of
unstable showers will continue to move in along windward and
mountain slopes of all islands during the overnight period with
higher precipitation trends favoring the island of kauai.

In the big picture, a weakening 1025 mb surface high about 700
miles north of the hawaiian islands will continue to track towards
the southeast through Tuesday. Decreasing surface pressure
gradients will cause trade wind speeds to become light starting
tomorrow, allowing modified sea breezes to develop over the
leeward slopes of each island by afternoon. Minimal shower
activity remains in the forecast grids from Tuesday through
Wednesday. By Tuesday night offshore land breezes will form with
onshore sea breezes with clouds forming over mountain and interior
sections of each island on Wednesday.

A cold front will bring clouds and elevated showers to kauai by
Wednesday night. Clouds and numerous showers along the frontal
band will slowly spread southeastward to the rest of the island
chain on Thursday and Friday. The diminishing frontal band will
stall over the eastern half of the state on Friday with elevated
showers mainly affecting windward and mountain slopes of maui and
the big island. Cooler northerly winds will develop after frontal
passage and island temperatures will run a few degrees colder
through Friday.

On Saturday and Sunday, a weak high pressure system will track
across the central pacific keeping light winds across the island
chain. Some unsettled showers associated with the diminished cold
front will favor windward slopes of each island through Sunday.

By next week Monday and Tuesday, another shallow cold front moves
into the region from the northwest and light winds will continue
across the region. Additional clouds and scattered showers along
this next frontal band will move into the northwestern islands on
Tuesday morning. Stay tuned for changes in the precipitation
timing part of the forecast for next week, as a higher degree of
uncertainty remains with the long range model guidance with this
next frontal passage.

Aviation
High pressure north of hawaii will maintain a trade wind flow,
but as the high moves slowly to the east through Tuesday, winds
will gradually weaken. Lingering moisture over kauai will maintain
clouds and showers island wise tonight, with the other islands
seeing some trade wind showers over windward slopes. As winds
weaken on Tuesday, expect to see some clouds develop over interior
and leeward areas mainly during the afternoon hours.

Airmet sierra continues for mountain obscuration on kauai.

Anticipating this to continue throughout the night, withVFR
conditions expected elsewhere.

Marine
The trade winds have started its weakening trend, and this trend
will continue through Tuesday. The winds will finally become light
and variable early Wednesday, then change to westerly in the
afternoon as a front continue its approach to the islands. The
front is expected to reach kauai Thursday afternoon. The slow
moving front will dissipate across the eastern islands between
Thursday and Saturday. A moderate to fresh northerly wind flow
fills in immediately behind the front, then veer to more typical
trade winds over the weekend as a weak high pressure system passes
north of the islands. Another front will be approaching the
islands from the west late in the weekend, where it will be
altering the wind flow around the islands once again.

We currently have a small craft advisory (sca) for the typically
windy near-shore waters around maui county and waters south of the
big island to 6 am hst Tuesday. We expect this SCA to run its
course with no extension.

The north-northwest swell from this weekend continues to decline.

There is small reinforcement from the north tonight through
Wednesday. Then we have series of moderate to large swells for the
second half of the week. First, a large northwest swell with a 6
foot swell and a 17 second period arrives Wednesday and Wednesday
night. A north- northwest (340 degrees), 7 foot swell, 13 second
period, follows in Thursday night through Friday. Then, a more
west swell of 300 degrees, 6 feet and 15 seconds, comes in
Saturday and Saturday night. The Wednesday swell has the potential
of reaching advisory level surf for at least the north facing
shores. But we will be monitoring closely for all three of them.

With the dying trades, surf along east facing shores will be
trending down as well during the next 24 to 48 hours.

A couple of long period swell from the south will maintain small
surf along the south facing shores throughout the period.

Hfo watches warnings advisories
Small craft advisory until 6 am hst Tuesday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Discussion... Bohlin
aviation... M ballard
marine... Lau


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 29 mi32 min 74°F 77°F1017.9 hPa
KLIH1 - 1615680 - Kahului Bay, Maui, HI 39 mi32 min 73°F 1019.2 hPa
51205 46 mi32 min 75°F7 ft
ILOH1 - 1617760 - Hilo, HI 72 mi32 min 67°F 76°F1019 hPa

Wind History for Kawaihae, HI
(wind in knots)    EDIT      (on/off)   Help
12
AM
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
Last
24hr
NE4
E2
S3
G7
NE6
NE3
G6
NE4
NW6
G10
E2
S3
W7
NW7
NW9
W12
W12
W9
SW11
SW9
W8
W8
SW6
SW5
E4
--
N3
G6
1 day
ago
E4
E11
G16
NE6
G14
N4
N4
N3
E2
NW3
G6
NW3
NW5
W8
NW8
W11
W12
G15
W11
SW7
W5
W8
W4
NW4
W2
N2
E1
G4
NE2
2 days
ago
NE5
NE6
E9
G15
E8
G14
E13
G17
E11
G18
SW4
G10
W7
G10
W5
SW8
SW10
SW4
G8
E14
G23
SE8
G13
E8
G12
SE9
G13
E13
G16
NE6
G18
E3
G11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI38 mi68 minNNE 1110.00 miA Few Clouds73°F59°F62%1019.8 hPa

Wind History from HOG (wind in knots)
12
AM
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
Last 24hrNE53CalmS6SW3SE45NE12NE12NE17
G24
E18
G26
E19
G29
E21
G28
NE17
G28
NE16
G28
E16
G27
E18
G29
NE19
G27
NE16
G25
E15
G20
E13
G21
NE8NE11NE11
1 day agoNE9NE9NE9NE8NE7NE6SE7SE7NE8NE11NE16
G21
NE18
G22
NE16
G25
NE19
G29
E20
G30
NE17
G27
E16
G22
E15
G21
NE12
G22
NE11
G19
E11
G18
NE10E9NE5
2 days agoNE10NE7NE10NE7NE9NE5S7S3NE10NE11
G17
NE14NE17
G23
NE18NE21
G26
NE23NE21NE19
G25
NE20NE12NE13NE10NE12NE12NE14

Tide / Current Tables for Mahukona, Hawaii Island, Hawaii
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Mahukona
Click for Map
Tue -- 03:42 AM HST     0.40 feet Low Tide
Tue -- 06:22 AM HST     Sunrise
Tue -- 07:37 AM HST     0.69 feet High Tide
Tue -- 10:57 AM HST     Moonset
Tue -- 01:21 PM HST     0.15 feet Low Tide
Tue -- 06:36 PM HST     Sunset
Tue -- 09:13 PM HST     1.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
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
10.70.50.40.40.50.60.70.70.60.50.40.20.20.20.30.50.81.11.41.61.71.71.5

Tide / Current Tables for Makena, Maui Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Makena
Click for Map
Tue -- 03:27 AM HST     0.40 feet Low Tide
Tue -- 06:24 AM HST     Sunrise
Tue -- 07:31 AM HST     0.49 feet High Tide
Tue -- 10:58 AM HST     Moonset
Tue -- 01:06 PM HST     0.15 feet Low Tide
Tue -- 06:38 PM HST     Sunset
Tue -- 09:07 PM HST     1.50 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
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
0.80.60.50.40.40.40.50.50.50.40.40.30.20.10.20.30.50.811.31.41.51.51.3

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_P
GOES 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 (6,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Kohala, HI
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.