Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Samoa, 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 7:01AMSunset 7:40PM Wednesday March 29, 2017 2:11 AM PDT (09:11 UTC) Moonrise 7:20AMMoonset 8:48PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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 /o.can.keka.ma.w.0062.000000t0000z-161123t1115z/ 301 Am Pst Wed Nov 23 2016
.the special marine warning is cancelled... The affected areas were... Coastal waters from pt. St. George to cape mendocino ca out 10 nm... Humboldt bay bar... The Thunderstorms have moved out of the area and no longer pose a significant threat to boaters. Lat...lon 4083 12412 4082 12417 4085 12417 4076 12423 4081 12418 4082 12413 4080 12418 4077 12420 4075 12419 4075 12422 4070 12426 4071 12427 4044 12442 4044 12443 4050 12450 4087 12429 4087 12416 4086 12417 4085 12409 time...mot...loc 1058z 282deg 14kt 4078 12425 4051 12443 4020 12433
PZZ400 924 Pm Pdt Tue Mar 28 2017
Synopsis for northern california waters..Light to moderate northerly winds will gradually back to the south tonight while a westerly swell propagates across the waters for the next few days. A weak cold front will maintain southerly winds on Wednesday and Wednesday night with a return to northerlies on Thursday.

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 282258
afdeka
area forecast discussion
national weather service eureka ca
358 pm pdt Tue mar 28 2017

Synopsis
As a cold front crosses the region, wet weather will
make a brief return for Wednesday into the first part of Thursday,
before ridging aloft brings dry conditions into early next week.

Another weak cold front will approach the region early next week,
with more rain possibly returning.

Discussion
Short term
(tonight and Wednesday)
after a very nice spring day today, get ready for a return to the
wet weather. Currently, ridging aloft has resulted in mainly clear
skies, with just a few high-level cirrus clouds moving across
portions of del norte and extreme northern humboldt county. However,
additional cloud cover is moving across into the region from the
west, with the leading edge of the cloud shield about 60 miles off
shore from crescent city. These clouds do extend southward and with
their rapid southeast movement, tthey'll overspread the area from west
to east through the night. This will help insulate the ground,
preventing temperatures from falling to quickly, with overnight lows
several degrees warmer than last night. With the growing season
underway across mendocino county, lows tonight look to remain above
40 degrees for most of the county, with no frost formation
anticipated.

Long term
(Wednesday evening Tuesday)
this has been a cooler and wetter than average rainy season, and
just like a scene from a movie you may know, the weather pattern may
reset itself to a "repeat scenario" next week. Before we get to that
though, our first storm system will be making inroads into our neck
of the woods during the day tomorrow. Widespread precipitation will
develop along and behind an approaching cold front, some of which
may be moderate in intensity at times, mainly across humboldt and
del norte county. Snow levels running near 8500 feet initially will
drop to around 4000 feet by Thursday morning/afternoon, with some
showers still in the vicinity. Thus, some higher elevation snowfall
will be possible.

There remains some potential for convection during this time as
well, mainly along and north of highway 299, and this is mainly if
you were to believe the GFS soundings. This is largely due to a
farther south trough, bringing the base of the colder air at 500 mb
across this area. This model continues to generate mucapes of a few
hundred joules with negative 700mb lifted indices, highest across
the trinity horn. Conversely, the higher resolution NAM shows little
if any instability. Given the model disparity, no thunder was added
to the forecast.

After this storm system departs the region, ridging at the surface
and aloft will build across northern california, before another
approaching front brings more wet weather early next week. /pd

Aviation
WidespreadVFR conditions should prevail through the
next TAF cycle for all terminals. Although some higher clouds may
filter across the region overnight bases will remain well above 10k.

The current drier northerly flow should prohibit any low cloud or
fog development both at the coast and across the interior.

Marine
Small craft advisory conditions will continue across all
waters mainly in response to a 10 ft mid period westerly swell. The
swell is expected to continue for at least a few more days. Little
wind chop is expected as winds remain light however a directional
change is anticipated overnight tonight as a weak front approaches
the coast. Light southerlies will be observed tomorrow before
slightly stronger northerlies return on Thursday and into the
weekend.

Eka watches/warnings/advisories
Ca... None.

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
HBYC1 - 9418767 - North Spit, CA 3 mi42 min SE 6 G 7 48°F 53°F1026.2 hPa
46244 - Humboldt Bay, North Spit, CA 10 mi51 min 54°F10 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 19 mi82 min E 1.9 G 3.9 53°F 53°F9 ft1025.7 hPa (-0.4)49°F
46213 - Cape Mendocino, CA (094) 46 mi50 min 53°F8 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 mi19 minN 07.00 miMostly Cloudy47°F46°F100%1026.4 hPa
Fortuna Rohnerville Airport, CA18 mi37 minSE 410.00 miMostly Cloudy45°F42°F93%1026.7 hPa

Wind History from ACV (wind in knots)
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Last 24hrE3CalmCalmE5E5E4S3CalmW6NW5NW5NW7NW9NW9NW8NW4NW7SE3SE3CalmE5E5CalmCalm
1 day agoSE3W9
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CalmCalmSE4N3NE3CalmNW9NW10NW8NW8NW14NW13NW16N11N9CalmNE3CalmCalmE4NE3E4
2 days agoE6E4SE5SE10SE9SE14
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W5SW10SW73SE3SE3SE4SE5CalmCalm

Tide / Current Tables for Eureka, Humboldt Bay, California
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Eureka
Click for Map
Wed -- 01:41 AM PDT     7.52 feet High Tide
Wed -- 07:04 AM PDT     Sunrise
Wed -- 07:41 AM PDT     -0.16 feet Low Tide
Wed -- 08:19 AM PDT     Moonrise
Wed -- 02:11 PM PDT     6.95 feet High Tide
Wed -- 07:38 PM PDT     Sunset
Wed -- 07:49 PM PDT     0.68 feet Low Tide
Wed -- 09:47 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.47.37.56.75.13.21.30.1-0.10.623.75.26.46.96.65.53.92.210.71.32.64.3

Tide / Current Tables for Fields Landing, Humboldt Bay, California
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Fields Landing
Click for Map
Wed -- 01:14 AM PDT     7.03 feet High Tide
Wed -- 07:04 AM PDT     Sunrise
Wed -- 07:32 AM PDT     -0.16 feet Low Tide
Wed -- 08:20 AM PDT     Moonrise
Wed -- 01:44 PM PDT     6.49 feet High Tide
Wed -- 07:39 PM PDT     Sunset
Wed -- 07:40 PM PDT     0.65 feet Low Tide
Wed -- 09:47 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.476.85.84.22.40.9-0-0.10.82.33.95.36.36.55.94.73.21.80.90.71.42.84.5

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 (5,6,7,8)
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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.