Wednesday, July17, 2019 L-36.com


Marine Weather and Tides
Samoa, CA

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Sunrise 5:58AMSunset 8:47PM Wednesday July 17, 2019 3:48 AM PDT (10:48 UTC) Moonrise 8:38PMMoonset 5:38AM Illumination 100% Phase: Full Moon; Moon at 15 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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PZZ410 227 pm pst Fri feb 15 2019 a marine weather statement has been issued for the following areas... Waters from pt. St. George to cape mendocino ca out 60 nm... Humboldt bay bar... At 222 pm pst, doppler radar indicated lines of showers and isolated Thunderstorms over the waters north of cape mendocino, capable of producing winds to around 30 knots and small hail. This activity was moving east-northeast at 30 knots. Precautionary/preparedness actions... Water spouts are possible along with stronger Thunderstorms... Locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until these storms pass. && lat...lon 4174 12417 4154 12405 4153 12405 4154 12408 4124 12410 4114 12416 4089 12413 4084 12418 4086 12410 4082 12410 4065 12431 4060 12418 4062 12424 4063 12432 4045 12440 4047 12579 4129 12555 4168 12568 4178 12579
PZZ400 244 Am Pdt Wed Jul 17 2019
Synopsis for northern california waters..Fresh to strong northerly breezes will persist across the coastal waters through the end of the week, with seas building in response. In addition, modest long-period southerly and mid-period northwesterly swells will move through the waters for much of the week.


7 Day Forecast for Marine Location Near Samoa, CA
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location: 40.81, -124.19     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 162244
afdeka
area forecast discussion
national weather service eureka ca
344 pm pdt Tue jul 16 2019

Synopsis Aside from patchy drizzle, dry weather is expected
across northwest california through the weekend. Interior high
temperatures will generally be in the 80s to low 90s across the
interior, with hotter spots warming into the mid to upper 90s
Wednesday and Thursday. Abundant sunshine will occur across the
interior this week, while periods of marine stratus continue for
most coastal areas.

Discussion Definitely a noticeably cooler and cloudier
afternoon compared to yesterday for portions of the coast, and
especially some of the near-coastal river valleys of humboldt and
del norte county. The cooling has come thanks to a deeper marine
layer and inland push of marine stratus, which has been slow to
retreat even this afternoon across northwestern humboldt county.

This deeper marine push was a result of a passing mid upper-level
trough, which also brought in some cooler air aloft. This air has
weakened the marine inversion enough to allow for some mixing and
partial clearing of the stratus and stratocumulus in some spots,
particularly around mckinleyville and arcata. This trend may
continue for a little while longer into the early evening with
breezier north-northwest winds than the past few days. Otherwise,
expect the stratus will fill back in tonight. Stratus is already
expanding along the mendocino coast between fort bragg and point
arena, which likely portends a cloudier overnight and morning
ahead for western mendocino county. Wednesday afternoon may turn
out a bit sunnier for coastal areas than today, as the marine
cloudiness should be a bit shallower and thinner.

Disturbances will continue to occasionally swing through the
persistent pacific northwest trough through the end of the week.

One of these will clip northwest california Wednesday night into
Thursday. Model guidance supports the idea of a deepening marine
layer once again, with perhaps some drizzle and fog and a more
persistently cloudier day on Thursday.

Heading through the weekend and into next week, little change is
expected in the overall sensible weather across our region, with
continued dry weather outside of any drizzle at the coast. The
consensus of deterministic and long- range guidance points toward
a building high pressure ridge over the western united states,
while our longwave trough effectively retrogrades farther offshore
to our west. This may allow temperatures inland to creep above
seasonal averages, but even the hottest spots should not rise much
above the mid to upper 90s. The marine layer cloudiness may
become shallower, but also could tend to be more persistent at the
immediate coast. Northerly winds will probably tend to be lighter
after some breezier afternoons this week. Aad

Aviation Stratus, fog, and even some patchy drizzle have lingered
along the redwood coast throughout the day, with conditions at
coastal terminals fluctuating between lifr and MVFR well into the
afternoon. Expect this trend to continue into the evening before
conditions slide back towards more solid lifr overnight. Recent
visible satellite trends suggest cec may see a few periods ofVFR
this afternoon, however localized stratus development in the
vicinity of pt saint george is maintaining ifr CIGS as the
prevailing condition for the time being. There is some reason for
optimism that we could see a bit more clearing at the coast on
Wednesday with the low level inversion looking a little weaker and
the marine layer trending a bit shallower, however confidence is on
the low side as the evolution of the marine layer has proven very
difficult to nail down in recent days. Meanwhile,VFR conditions are
expected for the remainder of the week for inland airfields
including uki. Cb

Marine Northerly winds will continue to increase through this
evening before peaking overnight. Sustained wind speeds of 15 to 25
kt can be expected in many areas, with the strongest winds located
near and south of CAPE mendocino and in the vicinity of point saint
george where gusts to 30 kt can be expected. This will generate
larger, steep seas, generally ranging from 6 to 9 feet with a period
of 6 to 7 seconds. Winds will weaken approximately 5 kt or so
Wednesday through early Thursday, but seas will remain generally
elevated, particularly from CAPE mendocino southward.

By Thursday afternoon, winds will increase markedly across the
waters, and this will continue into the weekend. Winds will once
again be strongest across the outer waters and near south of cape
mendocino, where sustained winds of 25 to 30 kt and gusts to 35 kt
will be possible. In the more sheltered areas along the humboldt
coast, winds of 15 to 25 kt will be more common. In any case, this
will drive elevated and steep seas through the weekend.

In addition to the steep seas discussed above, a modest southerly
swell will continue to build into the waters through roughly
Thursday, with wave heights of around 3 to 4 feet and a period of
around 17 or 18 seconds. While not particularly large, its
presence may be felt in coves, harbor entrances and along beaches
with southerly exposure. Another small mid-period swell will enter
the waters from the northwest late Wednesday or early Thursday.

Brc cb

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory
until noon pdt Wednesday for pzz470.

Small craft advisory until 3 am pdt Thursday for pzz455.

Small craft advisory until 9 am pdt Thursday for pzz475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HBYC1 - 9418767 - North Spit, CA 3 mi73 min 52°F1016.7 hPa
46244 - Humboldt Bay, North Spit, CA 11 mi49 min 59°F4 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 19 mi29 min N 12 G 14 56°F1016.4 hPa
46213 - Cape Mendocino, CA (094) 46 mi49 min 58°F5 ft

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, CA13 mi56 minN 010.00 miOvercast60°F57°F93%1016.3 hPa
Fortuna Rohnerville Airport, CA18 mi79 minWNW 84.00 miOvercast57°F57°F100%1016.6 hPa

Wind History from ACV (wind in knots)
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Last 24hrN3N3N8N5NW6NW9NW10NW13NW13NW14NW14NW13NW12NW12NW12NW12NW8N4N6N4NW3NW4NW3Calm
1 day agoSE3CalmCalmCalmCalmNW5W6NW3NW6NW4NW8NW13NW16NW17NW13NW14NW10N9CalmN4NW3NW8N5Calm
2 days agoCalmSE5CalmSE3SE4CalmW6W6W5W6W5NW10NW8NW7NW8W5NW7SE3SE4E4CalmCalmCalmCalm

Tide / Current Tables for Eureka, Humboldt Bay, California
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Eureka
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Wed -- 12:38 AM PDT     7.70 feet High Tide
Wed -- 05:59 AM PDT     Sunrise
Wed -- 06:37 AM PDT     Moonset
Wed -- 07:24 AM PDT     -0.75 feet Low Tide
Wed -- 02:13 PM PDT     5.90 feet High Tide
Wed -- 07:11 PM PDT     2.89 feet Low Tide
Wed -- 08:45 PM PDT     Sunset
Wed -- 09:37 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.57.66.95.53.81.90.2-0.7-0.60.21.42.84.25.45.95.75.14.33.42.93.145.16.1

Tide / Current Tables for Fields Landing, Humboldt Bay, California
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Fields Landing
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Wed -- 12:12 AM PDT     7.27 feet High Tide
Wed -- 06:00 AM PDT     Sunrise
Wed -- 06:38 AM PDT     Moonset
Wed -- 07:23 AM PDT     -0.85 feet Low Tide
Wed -- 02:10 PM PDT     5.59 feet High Tide
Wed -- 07:02 PM PDT     3.12 feet Low Tide
Wed -- 08:45 PM PDT     Sunset
Wed -- 09:37 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.37.16.24.831.3-0.1-0.8-0.70.11.42.94.25.25.65.44.843.43.13.44.15.16.2

Weather Map and Satellite Images
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GOES Local Image of CentralWestCoast    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 Eureka, CA (6,6,7,8)
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Ground Weather Radar Station Eureka, CA
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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.