Monday, July23, 2018 L-36.com


Marine Weather and Tides
Keokea, HI

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Sunrise 5:55AMSunset 7:09PM Sunday July 22, 2018 8:13 PM HST (06:13 UTC) Moonrise 3:17PMMoonset 1:59AM Illumination 78% Phase: Waxing Gibbous; Moon at 10 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
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PHZ119 Maalaea Bay- 341 Pm Hst Sun Jul 22 2018
.small craft advisory in effect through Monday afternoon...
Tonight..North winds to 25 knots. Wind waves 2 feet or less.
Monday..North winds to 25 knots. Wind waves 2 feet or less. Isolated showers in the afternoon.
Monday night..Northeast winds to 25 knots. Wind waves 3 feet.
Tuesday..North winds to 25 knots. Wind waves 3 feet in the morning then 2 feet or less. Isolated showers in the afternoon.
Tuesday night..Northeast winds to 25 knots. Wind waves 3 feet. Isolated showers in the evening.
Wednesday..North winds to 25 knots. Wind waves 3 feet.
Wednesday night..North winds to 25 knots. Wind waves 3 feet.
Thursday..North winds to 25 knots. Wind waves 2 feet or less.
Friday..North winds to 25 knots. Wind waves 3 feet.
PHZ100 341 Pm Hst Sun Jul 22 2018
Synopsis for hawaiian coastal waters.. Surface high pressure far north of the islands will maintain locally breezy trade winds this week.

7 Day Forecast for Marine Location Near Keokea, HI
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location: 20.67, -156.34     debug


Area Discussion for -
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Fxhw60 phfo 230202
afdhfo
area forecast discussion
national weather service honolulu hi
402 pm hst Sun jul 22 2018

Synopsis
High pressure north of the area will continue to produce trade
winds through this week. A wetter trade wind pattern is expected
tonight through Tuesday night as an area of enhanced moisture
moves across the area. Showers will favor windward and mauka areas
with less shower activity over most leeward locations.

Discussion
Areas of high pressure are presently centered far north northeast
and far north northwest of the area. This places the islands in a
moderate trade wind environment. Moisture embedded in the trades
is causing for some passing showers over some windward and mauka
areas while most leeward locations are dry.

Satellite imagery shows an area of enhanced moisture associated
with a weak low level trough moving westward in the trade wind
flow. The leading edge of this moisture is presently about 50
miles east of the big island. The 00z soundings along with
satellite derived precipitable water values are currently around
1.5 inches over the area. Upstream the satellite derived values
are between 1.7 and 2.0 inches.

Winds in a layer between about 3000 feet and 10000 feet are
blowing from and east southeastly direction over the east end of
the island chain. The 00z hilo sounding depicts this rather
clearly. This may cause emissions from the lower east rift zone
and halemaumau crater to blown over nearby populated
areas. The return to a more normal east northeasterly direction
in these winds, is expected to occur around Tuesday.

A gradual increase in showers from east to west is expected over
the next couple of days as this area of moisture moves across the
area. Aloft, a mid level ridge is in place across the area. This
will keep the airmass relatively stable so heavy showers are not
expected. Most showers will be focused over windward and mauka
areas with the trade winds sufficiently strong enough to blow some
passing light showers over to leeward areas at times. Some
increase in afternoon and evening shower activity is also possible
over the kona slopes.

A slightly drier trade wind weather pattern is expected beginning
Tuesday and continuing through Wednesday. Trade winds may be a
notch lower as we will lie on the east side of the weak trough
that passed across the area.

For the second half of the week, high pressure will remain far
north north east of the area keeping the state in a moderate trade
winds environment. Another area of higher moisture may move across
the area during the Wednesday night through Thursday night time
period with an uptick in windward and mauka shower activity a
possibility. A drier airmass is then expected as we head into next
weekend.

Aviation
Locally breezy east winds will persist through the coming week.

Clouds and showers will increase starting this evening as a weak
trough with additional low level moisture spreads over the
islands from the east. MVFR conditions will become widespread over
east sections of the islands and mtn obsc may become widespread
enough to require airmets tonight. The cloudy, showery conditions
are likely to continue through tomorrow.

Marine
Surface high pressure far north of the islands will continue to
produce locally breezy trade winds this week. A small craft
advisory (sca) remains in effect for maalaea bay and the pailolo
and alenuihaha channels through the day Monday. The SCA will
likely continue into midweek for these same areas, and may expand
to include additional waters Monday night or Tuesday.

The current long period south swell will maintain tonight, and
then gradually lower Monday through Tuesday. A high surf advisory
remains in effect through Monday afternoon for south facing shores
of all islands. Otherwise, only small south swells are expected
to maintain background surf along south facing shores from mid-
week into next weekend. The trade winds will continue to produce
moderate short-period choppy surf along east facing shores this
week.

Hfo watches warnings advisories
High surf advisory until 6 pm hst Monday for niihau-kauai
windward-kauai leeward-oahu south shore-waianae coast-molokai-
lanai makai-kahoolawe-maui leeward west-maui central valley-
leeward haleakala-kona-south big island-big island north and
east-kohala.

Small craft advisory until 6 pm hst Monday for maalaea bay-
pailolo channel-alenuihaha channel.

Discussion... Burke
aviation... Powell
marine... Foster


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 17 mi49 min NE 15 G 19 79°F 81°F1015.5 hPa
51205 24 mi43 min 79°F6 ft
51213 36 mi43 min 80°F4 ft
51202 - Mokapu Point, HI (098) 88 mi39 min 80°F5 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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NE6
NE6
G11
NE9
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NE11
G16
N11
N8
G12
NE8
G11
N9
NE9
G15
N7
G10
NE9
N10
G16
NE8
G15
N7
G16
NE8
G16
N14
G18
N14
G18
NE10
G21
NE23
G29
N7
G18
NE20
G25
NE21
NE12
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NE9
G14
NE10
G17
NE12
G16
NE10
G14
NE12
G15
NE10
G14
NE7
G10
NE10
G13
NE9
NE6
E6
G10
E3
G13
NE7
G13
NE8
NE9
G14
NE14
G17
NE12
G17
NE11
NE13
G18
NE11
G15
N12
NE14
G17
NE12
G17
NE11
G15
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NE12
G15
NE11
NE9
G13
NE11
NE9
G13
NE11
G16
NE15
G21
NE18
G23
NE16
G23
NE19
G24
NE18
G24
NE18
G22
NE13
G20
NE15
G21
NE12
G15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI17 mi19 minENE 1010.00 miMostly Cloudy77°F75°F96%1016.3 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE9NE7NE10NE14NE11NE10NE8NE8NE11NE7NE11NE11NE14
G21
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G25
NE20
G23
NE19
G28
NE19NE20
G29
E18
G27
NE18
G27
NE15
G26
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NE15NE10
1 day agoNE11
G18
NE12NE12NE10NE11NE9NE5NE5NE4E10E7E8N11NE12NE14
G21
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G26
NE18
G23
NE18NE14
G23
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G23
NE15NE13
G21
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NE6
2 days agoNE11NE11NE9NE9NE11NE13NE15NE14NE11
G15
E7NE5E11NE12NE14
G22
E16
G24
E15
G25
NE19
G28
NE20
G27
NE22
G29
NE18
G27
NE18
G25
E16
G24
E11
G19
E12
G19

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Mon -- 12:41 AM HST     1.11 feet High Tide
Mon -- 02:42 AM HST     Moonset
Mon -- 05:56 AM HST     Sunrise
Mon -- 06:15 AM HST     0.03 feet Low Tide
Mon -- 01:52 PM HST     2.37 feet High Tide
Mon -- 04:08 PM HST     Moonrise
Mon -- 07:07 PM HST     Sunset
Mon -- 08:49 PM HST     0.57 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.110.70.40.200.10.30.61.11.622.32.42.21.91.51.10.80.60.60.60.8

Tide / Current Tables for Kuheia Bay, Kahoolawe Island, Hawaii
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Kuheia Bay
Click for Map
Mon -- 12:35 AM HST     1.01 feet High Tide
Mon -- 02:43 AM HST     Moonset
Mon -- 05:57 AM HST     Sunrise
Mon -- 06:26 AM HST     0.00 feet Low Tide
Mon -- 02:00 PM HST     2.29 feet High Tide
Mon -- 04:08 PM HST     Moonrise
Mon -- 07:07 PM HST     Sunset
Mon -- 09:12 PM HST     0.42 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
110.90.70.40.2000.20.511.51.92.22.32.21.91.51.10.80.50.40.50.6

Weather Map and Satellite Images
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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.
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Wind Forecast for (2,6,7,8)
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Ground Weather Radar Station Kohala, HI
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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.