Tuesday, March28, 2017 L-36.com


Marine Weather and Tides
Westhaven-Moonstone, CA

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 7:02AMSunset 7:39PM Tuesday March 28, 2017 6:50 AM PDT (13:50 UTC) Moonrise 6:43AMMoonset 7:36PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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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PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 234 Am Pdt Tue Mar 28 2017
.small craft advisory in effect through Wednesday afternoon...
Today..NW winds 5 to 10 kt. Waves W 13 ft at 15 seconds.
Tonight..S winds up to 5 kt. Waves W 9 ft at 16 seconds.
Wed..SW winds up to 5 kt. Waves W 9 ft at 16 seconds. Rain.
Wed night..W winds 5 to 10 kt. Waves W 9 ft at 15 seconds.
Thu..N winds 10 to 20 kt. Waves N 5 ft at 8 seconds...and W 9 ft at 14 seconds.
Fri..N winds 10 to 20 kt. Waves N 5 ft at 8 seconds...and W 8 ft at 14 seconds.
Sat..N winds 5 to 15 kt. Waves nw 12 ft at 15 seconds.
PZZ400 234 Am Pdt Tue Mar 28 2017
Synopsis for northern california waters..Light to moderate northerly winds will prevail across the waters through Tuesday. An elevated westerly swell will propagate across the waters for the next few days. A weak cold front will bring southerly winds to the waters on Wednesday and Wednesday night. Northerly winds will return Thursday and Friday.

7 Day Forecast for Marine Location Near Westhaven-Moonstone, CA
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location: 41.05, -124.1     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 281215
afdeka
area forecast discussion
national weather service eureka ca
515 am pdt Tue mar 28 2017

Synopsis Upper level ridging will maintain dry weather
today through tonight. A cold front will bring a chance of rain
Wednesday through Thursday morning.

Discussion Upper level ridging will build over the area
today providing dry weather conditions and warmer afternoon
temperatures. Satellite imagery has been showing mid layer
clouds swiftly moving over the area from time to time in the
northwesterly flow aloft. Even with the high and mid clouds,
it is shaping up to be a fine day with fairly pleasant afternoon
temperatures, primarily for the interior.

We do have a frost advisory for interior portions of mendocino
county for early this morning. Temperatures across northern
mendocino county interior valleys were running in the mid to
upper 30s. The mid clouds have been hindering the full rate of
cooling. The advisory will be close. Thus will leave it as is.

What a surprise, the one dry weather day will not last. On
Wednesday a cold front will approach the north coast and rain
will once again enter the forecast picture. Broad scale ascent
will increase through the day on Wed and light rain will probably
start in the afternoon for areas north of the king range. The cold
front will push through Wednesday evening when most of the rain
will occur. Highest amounts and chances will be in del norte and
humboldt counties. Southern mendocino may not see any measurable
rain.

A mid level shortwave trough will generate additional showers
later Wed night into early thu. Instability will increase wed
night into Thu morning in response to strong 500mb cooling.

Isolated thunderstorms will be possible out near the coast and
over the coastal mountains north of the king range. The NAM and
gfs were not in great agreement with the degree of instability.

This will need to be looked at more closely by the next couple of
shifts for inclusion into the forecast.

The GFS has also been hinting at the possibility of convection in
trinity county Wednesday afternoon as a 110kt westerly speed max
noses toward CAPE mendocino. The NAM and bufkit soundings were not
as aggressive with the convective threat. Confidence is not high
enough to include thunder in the forecast at this point due to the
incongruities between these two models.

Upper level ridging will quickly rebuild later on Thursday after
the shortwave trough progresses eastward. Robust northerly winds
will develop behind this shortwave on thu. The brisk north flow
will last through Friday. Blustery northerly winds are expected
at the coast, primarily on Friday. The ridge will start to flatten
out and weaken on Saturday in response to another upper trough.

This trough will probably produce some light rain or showers on
Sunday. Additional light rain chances may follow on Monday before
the ridge rebuilds on Tuesday.

Aviation Vfr to MVFR conditions and light winds to calm
conditions will continue at kcec through early this morning. The
lower conditions will due to reduced ceilings and/or visibilities.

Vfr conditions and light winds will prevail at kcec late this
morning through tonight as a high pressure ridge persist across
the region.VFR conditions and light winds to calm conditions will
continue at kacv and kuki through tonight.

Marine Light to moderate winds will continue today through
Wednesday as a high pressure ridge maintains a relaxed pressure
gradient across the waters. An elevated westerly swell will
continue propagating across the waters this week. The seas will
diminish slightly Wednesday night. A weak cold front will move
across the region early Thursday. The winds and seas will increase
Thursday. Small craft advisories will continue in effect across
all the waters through Wednesday afternoon due to the westerly
swell. Another weak cold front will move across the waters late
Saturday and early Sunday. Small craft advisories are likely
across the southern outer waters Thursday through Saturday due to
elevated winds and seas. Small craft advisories are likely across
the northern outer waters through Saturday due to elevated winds
and/or seas. Small craft advisories are likely across the southern
near shore waters Thursday and again on Saturday due to elevated
winds and/or seas. Small craft advisories are likely across the
northern near shore waters on Saturday due to elevated seas.

Eka watches/warnings/advisories
Ca... Frost advisory until 9 am pdt this morning for caz110-111-113.

Northwest california coastal waters... Small craft advisory
until 3 pm pdt Wednesday for pzz450-455-470-475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46244 - Humboldt Bay, North Spit, CA 18 mi59 min 53°F12 ft
HBYC1 - 9418767 - North Spit, CA 21 mi74 min SE 5.1 G 7 45°F 53°F1029.3 hPa
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 32 mi60 min N 9.7 G 12 51°F 52°F13 ft1028.8 hPa (+0.3)44°F
CECC1 - 9419750 - Crescent City, CA 48 mi50 min NE 4.1 G 6 46°F 54°F1029.2 hPa (+0.0)

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Arcata / Eureka, Arcata Airport, CA4 mi57 minE 510.00 miFair41°F41°F100%1029.3 hPa

Wind History from ACV (wind in knots)
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Last 24hrSE4N3NE3CalmNW9NW10NW8NW8NW14NW13NW16N11N9CalmNE3CalmCalmE4NE3E4E3CalmCalmE5
1 day agoSE9SE14
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W5SW10SW73SE3SE3SE4SE5CalmCalmSE3W9
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2 days agoCalmN7E4E4W3W5W6NW8NW8NW5NW5NW5NW3CalmCalmE3E3SE3SE4E4E6E4SE5SE10

Tide / Current Tables for Trinidad Harbor, California
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Trinidad Harbor
Click for Map
Tue -- 12:29 AM PDT     6.72 feet High Tide
Tue -- 06:39 AM PDT     0.27 feet Low Tide
Tue -- 07:05 AM PDT     Sunrise
Tue -- 07:43 AM PDT     Moonrise
Tue -- 12:46 PM PDT     6.62 feet High Tide
Tue -- 06:53 PM PDT     0.25 feet Low Tide
Tue -- 07:37 PM PDT     Sunset
Tue -- 08:36 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.66.65.84.42.81.30.40.312.33.95.46.46.664.83.21.60.60.30.823.65.3

Tide / Current Tables for Mad River Slough, Arcata Bay, Humboldt Bay, California
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Mad River Slough
Click for Map
Tue -- 01:23 AM PDT     7.61 feet High Tide
Tue -- 07:06 AM PDT     Sunrise
Tue -- 07:18 AM PDT     0.32 feet Low Tide
Tue -- 07:43 AM PDT     Moonrise
Tue -- 01:38 PM PDT     7.55 feet High Tide
Tue -- 07:31 PM PDT     0.30 feet Low Tide
Tue -- 07:37 PM PDT     Sunset
Tue -- 08:35 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.87.57.46.44.72.81.20.40.61.63.356.47.47.56.75.13.21.50.50.41.32.94.7

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Eureka, CA (9,2,3,4)
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Ground Weather Radar Station Eureka, CA
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weather_mapweather_map weather_map

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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.