Saturday, April20, 2019 L-36.com


Marine Weather and Tides
Samoa, CA

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 6:28AMSunset 8:02PM Saturday April 20, 2019 9:14 AM PDT (16:14 UTC) Moonrise 8:42PMMoonset 6:37AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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 827 Am Pdt Sat Apr 20 2019
Synopsis for northern california waters..Northerly winds gusting to gale force and steep, short-period seas will develop across the coastal waters early this morning and persist through this evening. Otherwise, a W to nw swell will subside through the weekend.


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 201103
afdeka
area forecast discussion
national weather service eureka ca
403 am pdt Sat apr 20 2019

Synopsis Damp, drizzly conditions will continue in del norte,
humboldt and trinity counties through the morning, with gradual
improvement later in the afternoon. However, a few weak
thunderstorms will be possible in far eastern trinity county this
afternoon. A warming and drying trend can be expected Sunday
through mid week, with a slight cooling trend and slight chances
for showers late in the week.

Discussion Widespread light rain and drizzle is ongoing across
much of the area early Friday morning, particularly across the
hills of humboldt and del norte counties where orographic lift is
maximized, as a weak cold front passes through the region. This
will generally continue through approximately late morning before
significant drying aloft reduces precipitation in all but the
most favorably oriented mountain ranges. By late morning and early
afternoon, the cooler temperatures aloft associated with the core
of the passing upper low will begin to move into northern
california, and the combination of this along with modest surface
heating may be enough to generate some weak instability. This will
be maximized to the east of trinity county for the most part, but
it's not impossible that a few weak thunderstorms could develop
very near the eastern boundary of trinity county by early
afternoon. In any case, any storms that manage to develop here
will be weak and relatively fast moving toward the southeast.

Meanwhile, northerly winds are expected to increase across the
coastal waters throughout the day Friday as the pressure gradient
strengthens between deepening surface low pressure across the
sacramento valley and building high pressure across the eastern
pacific. These northerlies will hug the coast closely, resulting
in gusty conditions very near the water and along prominent
coastal ridges and headlands. Sustained winds of 20 to 30 mph
with gusts to 40 or 45 mph will be possible in these areas between
mid afternoon and this evening before diminishing overnight.

By Sunday, a building ridge of high pressure will kick off a
prolonged warming and drying trend that will continue through at
least mid week. While coastal temperatures may warm slightly into
the low 60s by Monday and Tuesday, the more significant warming
will take place across the interior where valleys will likely
climb well into the 80s. No precipitation is expected either,
likely until Wednesday afternoon at the very earliest.

Slightly cooler temperatures and slight chances for showers are
likely to return Wednesday through the end of the week as the
upper level ridge weakens and allows for weak shortwave troughs to
move through the area. Brc

Aviation Marine stratus is generally expected to persist through
today along the coast and inland to the coastal hills. Ceilings are
expected to lift later this morning and afternoon, allowing mostly
ifr to MVFR conditions to prevail along the coast. Gusty north to
northwest are forecast to develop along the coast this morning and
are expected to persist through late this evening. Marine stratus
could be impacted by these gusty winds, allowing for some clearing
along the coast later today. Low clouds will be possible across
interior valleys through late this morning, withVFR conditions
expected to prevail by mid-morning.

Marine North to northwest winds will continue to increase this
morning, with gusts to gale force likely from mid-morning until
early tonight across all coastal zones. Gale force gusts will still
be possible across the outer zones through early Sunday morning.

Steep, short-period seas will develop as a result of these gusty
northerlies. These steep short-period seas will range from 7 to 11
feet at 7 to 9 seconds. Winds will remain elevated through early
Sunday and are forecast to gradually weaken through early next week,
though winds will remain around 15 to 25 knots across the outer
waters through mid-week. Winds are then forecast to strengthen to
near gale force again late next week across the outer waters.

Otherwise, a west to northwest swell will wane this weekend. Brc

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory until 8 am pdt this morning for pzz450-455-
470-475.

Gale warning from 8 am this morning to 11 pm pdt this evening
for pzz450-455.

Gale warning from 8 am this morning to 5 am pdt Sunday for
pzz470-475.

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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 mi98 min 55°F1015.3 hPa
46244 - Humboldt Bay, North Spit, CA 11 mi44 min 54°F10 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 19 mi44 min NNW 23 G 29 54°F1016.6 hPa
46213 - Cape Mendocino, CA (094) 46 mi44 min 54°F10 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 mi21 minN 17 G 249.00 miOvercast51°F48°F92%1015.8 hPa
Fortuna Rohnerville Airport, CA18 mi19 minNW 104.00 miMostly Cloudy50°F48°F94%1015.6 hPa

Wind History from ACV (wind in knots)
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Last 24hrS3W5W7CalmNW9NW9W5NW11NW10NW11NW11N9NW7N7N7N4NW3N10N8N12N12N11N10N17
G24
1 day agoNW5W3NW5NW5W4SW6NW7NW7W4NW4W4S5S3CalmCalmNW3CalmCalm3CalmCalmCalmN4NW3
2 days agoNW6NW7NW15NW15NW16NW17NW15
G22
NW14NW13NW11N10N6NE3CalmCalmCalmNE3CalmCalmE3CalmCalmCalmCalm

Tide / Current Tables for Eureka, Humboldt Bay, California (2)
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Eureka
Click for Map
Sat -- 01:22 AM PDT     8.20 feet High Tide
Sat -- 06:30 AM PDT     Sunrise
Sat -- 07:36 AM PDT     Moonset
Sat -- 07:41 AM PDT     -0.63 feet Low Tide
Sat -- 02:18 PM PDT     6.76 feet High Tide
Sat -- 07:36 PM PDT     1.60 feet Low Tide
Sat -- 08:01 PM PDT     Sunset
Sat -- 09:42 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.48.186.952.80.9-0.4-0.60.11.53.24.96.16.76.65.64.22.71.81.72.33.65.2

Tide / Current Tables for Fields Landing, Humboldt Bay, California
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Fields Landing
Click for Map
Sat -- 12:55 AM PDT     7.66 feet High Tide
Sat -- 06:30 AM PDT     Sunrise
Sat -- 07:32 AM PDT     -0.61 feet Low Tide
Sat -- 07:37 AM PDT     Moonset
Sat -- 01:51 PM PDT     6.32 feet High Tide
Sat -- 07:27 PM PDT     1.53 feet Low Tide
Sat -- 08:01 PM PDT     Sunset
Sat -- 09:42 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.37.77.25.94.12.10.5-0.5-0.50.31.83.5566.35.94.83.52.31.61.72.53.85.4

Weather Map and Satellite Images
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wmap_P
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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Eureka, CA (12,3,4,5)
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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.