Sunday, March26, 2017 L-36.com


Marine Weather and Tides
Paia, HI

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:21AMSunset 6:40PM Sunday March 26, 2017 2:40 PM HST (00:40 UTC) Moonrise 5:32AMMoonset 5:40PM Illumination 0% Phase: New Moon; Moon at 29 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
PHZ119 Maalaea Bay- 933 Am Hst Sun Mar 26 2017
.small craft advisory in effect through Monday afternoon...
Rest of today..North winds to 25 kt. Wind waves 3 ft.
Tonight..Northeast winds to 25 kt. Wind waves 3 ft.
Monday..North winds to 25 kt. Wind waves 2 ft or less.
Monday night..North winds 20 kt. Wind waves 2 ft or less.
Tuesday..Northeast winds 20 kt. Wind waves 2 ft or less.
Tuesday night..Northeast winds 20 kt. Wind waves 2 ft or less.
Wednesday..Northeast winds 20 kt. Wind waves 2 ft or less.
Thursday..Northeast winds 20 kt. Wind waves 2 ft or less.
PHZ100 933 Am Hst Sun Mar 26 2017
Synopsis for hawaiian coastal waters.. High pressure north of the islands will shift east into the early portion of the week as a cold front passes far north of the state.

7 Day Forecast for Marine Location Near Paia, HI
   Hourly   EDIT   Help
location: 20.9, -156.36     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 261935
afdhfo
area forecast discussion
national weather service honolulu hi
935 am hst Sun mar 26 2017

Synopsis
A persistent ridge of high pressure northeast of the islands will
keep trade winds blowing through next weekend, with locally breezy
levels expected today and tonight. A dry and stable airmass will
keep showers limited and confined primarily to windward slopes
through the first half of the work week. An increase in trade wind
showers is then expected Wednesday through next weekend as upper
level troughing sets up over the island chain.

Discussion
Currently at the surface, a 1028 mb high centered around 1050
miles northeast of honolulu, is driving moderate to breezy trade
winds across the state this morning. Mimic total precipitable
water (pw) imagery shows a dry airmass remaining in place across
the area, with pw values right around 1 inch. This correlates
well with the 12z soundings from phto and phli which came in with
pw values of 0.93 and 1.06 inches respectively. Additionally both
of the early morning soundings showed a stable airmass firmly
encompassing the island chain, with a sharp low level inversion
between 4 and 5 kft at each site. Satellite imagery shows some low
clouds moving into windward areas with the trades, while leeward
areas remain mostly clear. Meanwhile, radar imagery shows some
light showers moving into windward section of the big island and
just to the north of molokai, with mainly rain free conditions
elsewhere. Main short term concern continues to focus around the
ongoing high surf headlines.

Today through Tuesday night,
high pressure northeast of the islands will keep a fairly tight
pressure gradient in place across the islands through tonight,
with moderate to breezy trades expected to continue. The trade
wind speeds are expected to drop off a notch Monday through
mid week, as high pressure lifts further northeast and away from
island chain. A dry and stable airmass is expected to limit shower
activity through the period, with pw values remaining around 1
inch. Showers will favor windward and mauka areas, primarily
during the overnight and early morning hours.

Wednesday through Saturday,
model solutions are in good agreement showing high pressure
remaining anchored well to the northeast of the state through the
period, with a weakening front approaching from the northwest late
in the week. Light to moderate trades are expected through the
end of the work week, with localized sea breezes possible,
particularly across the western islands where the pressure
gradient won't be as tight. The trades are then expected to
increase back to moderate and locally breezy levels over the
weekend as a re-enforcing area of high pressure north of the
island chain, tightens the pressure gradient once again. Aloft, a
weakness in the upper level ridge is expected to move overhead
during the middle and latter part of the week, and this should de-
stabilize the airmass a bit. This in combination with increasing
boundary layer moisture resulting from the persistent easterly
trades, should lead to an increase in trade wind showers across
the islands. Showers will continue to favor windward and mauka
areas, with activity most prevalent during the overnight and early
morning hours.

Aviation
Locally breezy trade winds will continue today. The morning
soundings show the inversion height to be around 4.5 kft. Airmet
tango for low level turbulence over and immediately south through
west of the mountains remains posted.

Scattered clouds and isolated showers will favor the windward and
mountain areas. Expect predominatelyVFR conditions, however some
brief passing showers may introduce short periods of MVFR
cigs/vis.

Marine
Hazardous boating and beach conditions will continue into Monday
before trending down into mid week due to a combination of fresh
to strong trade winds and a large west-northwest (wnw; 300-310
deg) swell that is currently moving down the island chain. These
conditions have led to a small craft advisory for all hawaiian
waters due to winds (25 to 30 kts, strongest in the channels)
and/or seas (10 ft or greater) through Monday. The large wnw
swell will generate life-threatening surf along exposed north and
west facing shores into Monday before slowly trending down into
mid week.

For the building wnw swell, the latest pacioos nearshore buoy
observations are remaining in good agreement with the latest wave
model guidance. However, earlier this morning a few observations
at the waimea buoy spiked into the 9 to 12 ft range a couple of
times through the overnight hours. Although these random spikes in
wave heights appear to have been or could have been spurious (a
few feet higher than the fully exposed hanalei buoy), the north
facing shores of oahu remain in the warning. The west side of
oahu was left in the advisory, due to the anticipated shadowing
associated with this westerly swell direction. Elsewhere, wave
heights are remaining around 9 ft at hanalei and around 7 ft at
the pauwela buoy. The offshore buoys northwest of kauai have
peaked with heights ranging from 11 to 13 ft, which was the
predicted peak of this swell event.

Surf along east facing shores will remain small and choppy
through the upcoming week due to moderate to strong onshore winds
persisting.

Surf along south facing shores could see a slight increase late
today due to the previously discussed wnw swell wrapping around
the islands. A slight increase in surf along south facing shores
is possible Thursday through Saturday due to a long-period swell
(190 deg) associated with recent activity across the southern
pacific.

For the outlook, another large long-period wnw (310 deg) swell
will be possible across the islands Thursday night through the
weekend. The latest deterministic and ensemble guidance remain in
decent agreement over the next few days and depict a storm-force
low developing off the coast of japan tonight into Monday, then
tracking ene to the date line Tuesday night into Wednesday while
intensifying to around a 970 mb low. A large batch of gale- to
storm- force westerly winds focused toward the region through
this time is forecast with seas peaking within the 30 to 40 ft
range. Swell across the islands associated with this storm will
likely lead to another period of warning-level surf and advisory-
level seas. More details will follow this week as this system
evolves and confidence increases with regard to specifics on
arrival times and impacts.

Hfo watches/warnings/advisories
High surf warning until 6 am hst Monday for niihau-kauai
windward-kauai leeward-oahu north shore-oahu koolau-kona-south
big island-kohala.

High surf advisory until 6 am hst Monday for waianae coast-
molokai-maui windward west-maui central valley-windward
haleakala.

Small craft advisory until 6 pm hst Monday for all hawaiian
waters-
discussion... Jelsema
aviation... Eaton
marine... Evans


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
KLIH1 - 1615680 - Kahului Bay, Maui, HI 6 mi41 min ENE 25 G 33 78°F 77°F1019 hPa (-2.6)
51205 9 mi62 min 76°F8 ft
51203 - Kaumalapau, HI (146) 35 mi26 min 79°F6 ft
51202 - Mokapu Point, HI (098) 78 mi37 min 76°F8 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
Last
24hr
NE15
G23
NE16
G21
NE16
G20
NE17
G23
NE15
G23
NE14
G17
NE11
G16
NE11
G15
E11
G14
NE14
G21
N12
NE11
G17
NE16
G23
NE15
G21
NE16
G20
NE15
G20
SE5
NE15
G25
N2
G7
N11
G16
NE22
G28
NE24
G30
NE22
G32
NE25
G33
1 day
ago
NE17
G21
NE12
G22
NE17
G22
NE13
G19
NE11
G16
N6
G9
N4
N6
NE15
G20
N14
G18
N13
G16
N10
G16
N12
G19
N13
G17
N16
G20
N10
G13
NW10
G15
N12
G17
NE14
G17
NE12
G16
NE16
G22
NE17
G22
NE16
G24
N18
G23
2 days
ago
NE13
G17
NE15
G20
NE14
G18
NE15
G20
NE12
G16
NE15
G20
NE13
G17
E6
G10
NE9
E3
W1
W4
G8
N4
SE2
S3
NW6
E4
G7
NW4
NE4
G7
NE12
G17
NE11
G18
NE15
G21
NE12
G19
NE15
G21

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI4 mi47 minENE 25 G 3310.00 miPartly Cloudy and Windy86°F64°F49%1019.2 hPa
Lahaina - West Maui, HI17 mi56 minNE 12 G 2115.00 miPartly Cloudy81°F62°F54%1020.7 hPa

Wind History from HOG (wind in knots)
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
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
Last 24hrNE23
G34
E20
G30
NE18
G26
NE16
G23
NE13
G18
NE14
G22
E12
G20
NE7E7NE16
G23
NE13NE9NE14
G23
NE12
G23
NE14NE12
G17
SE9NE15
G27
S44NE22
G30
NE20
G29
NE23
G31
NE25
G33
1 day agoNE16
G25
E13
G20
NE15NE14NE9E4E4NE4NE16E5CalmCalmN3E5CalmNE9NE6NE12NE14
G21
NE14
G24
E14
G22
NE17
G22
NE18
G28
NE21
G29
2 days agoNE14NE14NE15
G20
E14
G21
NE7
G17
E10E7
G15
E5NE5SE4W4SE5SE5S6SE6NW5SE5CalmE7NE14
G20
E13
G20
E17
G25
E16
G22
NE14
G21

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Kahului
Click for Map
Sun -- 01:41 AM HST     2.27 feet High Tide
Sun -- 05:32 AM HST     Moonrise
Sun -- 06:24 AM HST     Sunrise
Sun -- 08:00 AM HST     0.09 feet Low Tide
Sun -- 01:47 PM HST     1.80 feet High Tide
Sun -- 05:39 PM HST     Moonset
Sun -- 06:38 PM HST     Sunset
Sun -- 07:48 PM HST     -0.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.92.22.321.61.10.60.20.10.20.511.41.71.81.61.20.70.3-0-0.10.10.51.1

Tide / Current Tables for Kihei, Maui (Hawaii)
   EDIT      (on/off)   Help   One Week of Data
Kihei
Click for Map
Sun -- 03:03 AM HST     2.08 feet High Tide
Sun -- 05:32 AM HST     Moonrise
Sun -- 06:24 AM HST     Sunrise
Sun -- 09:13 AM HST     -0.06 feet Low Tide
Sun -- 03:29 PM HST     1.68 feet High Tide
Sun -- 05:39 PM HST     Moonset
Sun -- 06:38 PM HST     Sunset
Sun -- 09:10 PM HST     -0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.21.61.92.121.61.10.50.1-0.100.30.71.11.41.61.61.410.50.1-00.10.4

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
cpac_satellite

GOES Local Image of Hawaii    EDIT
Geos

Wind Forecast for (20,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Molokai, 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.