Tuesday, October17, 2017 L-36.com


Marine Weather and Tides
Samoa, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 7:30AMSunset 6:33PM Tuesday October 17, 2017 5:21 PM PDT (00:21 UTC) Moonrise 4:13AMMoonset 4:54PM Illumination 6% Phase: Waning Crescent; Moon at 27 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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This is a Weather Statement Zone, please check the Date to see if it has expired
PZZ410 754 Am Pdt Thu Sep 7 2017
.a strong Thunderstorm over the waters... The areas affected include... Coastal waters from pt. St. George to cape mendocino ca out to 50... At 751 am pdt...doppler radar indicated Thunderstorms... Capable of producing local winds to around 30 knots and small hail. These storms are moving to the northwest at 25 knots. These Thunderstorms will continue through at least mid morning. Precautionary/preparedness actions... Mariners can expect gusty winds to around 30 knots...locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. && lat...lon 4174 12417 4160 12410 4114 12416 4104 12412 4077 12423 4076 12423 4081 12418 4081 12417 4069 12422 4071 12426 4065 12431 4063 12428 4062 12426 4061 12433 4045 12441 4052 12578 4178 12499 4178 12426
PZZ400 252 Pm Pdt Tue Oct 17 2017
Synopsis for northern california waters..An offshore ridge will maintain light to moderate northerly winds through tomorrow. Winds will become southerly tomorrow afternoon and increase ahead of a cold front. This system will generate steep wind waves on Thursday as well as a large nw swell that will build later on Thursday and persist through Fri.

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 172153
afdeka
area forecast discussion
national weather service eureka ca
253 pm pdt Tue oct 17 2017

Synopsis Widespread rains will spread across the region
Thursday afternoon into Friday, with lighter showers persisting
through the weekend. Drier and warmer conditions are then expected
next week.

Discussion A progressive upper flow regime was observed Tuesday
afternoon from roughly the aleutians eastward to the pacific
nw swrn canada. Within this flow regime, a vigorous shortwave
trough was emerging over the gulf of alaska, and is forecast to
dig sewd across the nern pacific through Wednesday night. A
surface frontal boundary will sharpen ahead of the upper wave, and
move onshore across nwrn ca by roughly midday Thursday. Frontal
ascent combined with moist southwesterly flow aloft will favor
widespread rainfall with the frontal passage, with storm total
Thursday-Friday rains near 2 inches over del norte county,
ranging to around a quarter inch over southern mendocino county.

After the frontal passage, 500 mb temperatures near -28 c will
spread inland across oregon, with slightly warmer midlevel
temperatures impacting northern ca. As a result, only marginal
destabilization will occur over nwrn ca, leading to a sub-
optimal airmass for coastal thunderstorms. In addition, warmer
midlevel air over NRN ca will restrict light snowfall to only the
highest peaks in the trinity alps.

Over the weekend, light shower activity will persist across the
area, with the highest probability located in del norte county.

Thereafter, model guidance shows midlevel ridging developing over
california, which signals a drier and warmer pattern for the
early to middle portions of next week.

Aviation A band of marine clouds formed and became quite
entrenched along the north coast early this morning. While
impacting airport CIGS & vis, local conditions rapidly dropped
down to ifr lifr at acv & cec with patchy drizzle reported at eka.

Clouds began to erode and shrink from the coast by late morning
to shortly after noonday whenVFR conditions finally prevailed.

Stratus remained hugged up along the southern mendocino coast
through afternoon. Interior areas remained clear with inland
mendocino reporting some fu hz due to wildfires. Through the
evening TAF period, model guidance suggest another round of
stratus and fog... As well as patchy drizzle... Redeveloping along
the coast through Wednesday morning. Ta

Marine Light to moderate northerly winds today and tonight
will diminish on Wed as southerly winds begin in advance of an
approaching cold front. As the winds begin to die down Thursday
afternoon a very large and long period west-northwest swell will
build behind the front Thu night. This very large swell will
persist into Friday however seas will remain elevated through the
weekend. Another round of brisk southerly winds and steep
southerly waves will return Fri night into Sat for the northern
waters. Large seas will persist through the weekend and into early
next week. Wci

Fire weather West-southwesterly winds are forecast to
strengthen across area ridgetops Wednesday night into Thursday
ahead of a cold front. However, rh values will be on the increase
as winds strengthen, which should mitigate a more significant fire
weather threat. By Thursday afternoon, widespread rain will spread
across northwest california, with storm total values near 2 inches
expected in del norte county, ranging to around a quarter inch
over southern mendocino county. Lighter showers will then persist
through the weekend, before warmer and drier conditions return
next week.

Beach hazards and surf Wave models remain consistent with very
large west-northwest swell building Thu night and fri. This swell
will build to around 17 to 20 feet with periods near 18 seconds
late Thu night and peak early Friday morning. Swell of this
magnitude will result in very large breakers in the surf zone as
well as hazardous waves in the harbor entrances. Current
indications are for surf to exceed 20 feet for west and northwest
oriented surf by late Thursday afternoon and remain elevated
through Friday night. This surf will slowly begin to decay through
the weekend. Wci

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory from 9
am to 3 pm pdt Thursday for pzz450- 455-475.

Hazardous seas watch from Thursday afternoon through Friday
afternoon for pzz450-455-470-475.

Small craft advisory from 3 am to 3 pm pdt Thursday for pzz470.

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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 mi51 min N 6 G 8.9 51°F 51°F1020.9 hPa
46244 - Humboldt Bay, North Spit, CA 11 mi90 min 51°F7 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 19 mi91 min N 3.9 G 5.8 50°F 51°F6 ft1020.7 hPa (-0.9)49°F
46213 - Cape Mendocino, CA (094) 46 mi59 min 52°F6 ft

Wind History for North Spit, Humboldt Bay, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Arcata / Eureka, Arcata Airport, CA13 mi28 minNW 710.00 miFair61°F50°F67%1020.2 hPa
Fortuna Rohnerville Airport, CA18 mi46 minW 910.00 miFair59°F50°F72%1020.7 hPa

Wind History from ACV (wind in knots)
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Last 24hrS4SW5SE4E3CalmCalmCalmE3CalmCalmCalmE3CalmCalmCalmCalmS4W3N5NW64NW10
G14
NW13NW7
1 day agoS4CalmCalmCalmCalmCalmE3NE3CalmE4CalmE3CalmCalmCalmCalmCalmNW4NW5NW4NW5W4W4S6
2 days agoS4S6SE4E3NE3CalmSE3E4E4E4E4E3E3CalmE3CalmCalm3SW3NW5NW6NW5W3SW4

Tide / Current Tables for Eureka, Humboldt Bay, California
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Eureka
Click for Map
Tue -- 04:42 AM PDT     0.53 feet Low Tide
Tue -- 05:13 AM PDT     Moonrise
Tue -- 07:30 AM PDT     Sunrise
Tue -- 11:25 AM PDT     7.25 feet High Tide
Tue -- 05:18 PM PDT     0.85 feet Low Tide
Tue -- 05:54 PM PDT     Moonset
Tue -- 06:32 PM PDT     Sunset
Tue -- 11:40 PM PDT     6.71 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.14.93.41.80.80.61.22.33.85.36.57.27.16.34.83.11.60.911.93.14.55.76.5

Tide / Current Tables for Fields Landing, Humboldt Bay, California
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Fields Landing
Click for Map
Tue -- 04:33 AM PDT     0.51 feet Low Tide
Tue -- 05:13 AM PDT     Moonrise
Tue -- 07:30 AM PDT     Sunrise
Tue -- 10:58 AM PDT     6.77 feet High Tide
Tue -- 05:09 PM PDT     0.82 feet Low Tide
Tue -- 05:54 PM PDT     Moonset
Tue -- 06:32 PM PDT     Sunset
Tue -- 11:13 PM PDT     6.27 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.44.22.81.40.60.61.32.545.46.46.86.45.442.51.30.81.123.34.65.76.2

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 (20,4,5,8)
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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.