Sunday, April30, 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 6:13AMSunset 8:14PM Sunday April 30, 2017 7:53 AM PDT (14:53 UTC) Moonrise 9:12AMMoonset 12:00AM Illumination 21% Phase: Waxing Crescent; Moon at 5 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 1227 pm pdt Wed apr 19 2017 a marine weather statement has been issued for the following areas... Coastal waters from cape mendocino to pt. Arena ca out 10 nm... Coastal waters from pt. St. George to cape mendocino ca out 10 nm... Humboldt bay bar... Waters from cape mendocino to pt. Arena ca from 10 to 60 nm... Waters from pt. St. George to cape mendocino ca from 10 to 60 nm... Scattered Thunderstorms will continue to develop through 3 pm. The main storm hazards will be dangerous cloud to water lightnig...wind gusts to 40 knots or more...small hail...and waterspouts. 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.ground 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 4156 12410 4150 12398 4153 12407 4154 12408 4089 12413 4076 12423 4087 12414 4085 12409 4083 12408 4065 12431 4060 12416 4051 12413 4063 12432 4043 12441 4044 12581 4129 12555 4168 12568 4178 12579
PZZ400 253 Am Pdt Sun Apr 30 2017
Synopsis for northern california waters..Northerly winds will increase today through tonight after a weak front moves across the pacific northwest and high pressure rebuilds toward the coast. North winds will ease on Mon while seas remain steep.

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 301029
afdeka
area forecast discussion
national weather service eureka ca
329 am pdt Sun apr 30 2017

Synopsis Generally mild and dry conditions are forecast to
prevail across the region through Wednesday. Thereafter, cooler
temperatures and increasing rain chances appear possible during
the latter portions of the upcoming week.

Discussion The previous forecast package is generally on track
through Thursday. Light rain or drizzle is expected Sunday
morning over humboldt and del norte counties as a frontal boundary
weakens over the area. A similar scenario repeats Monday
night... With very light rain possible over del norte county. In
addition, a strengthening marine boundary layer inversion will aid
in stratus over the pacific... As well as adjacent coastal areas
north of CAPE mendocino. Otherwise, a midlevel ridge is forecast
to shift east to the great basin by Thursday. Low-level
temperatures will warm as this takes place, with many interior
valleys experiencing highs in the 80s Wednesday and Thursday.

Deterministic and ensemble model guidance then depict an
amplified upper trough digging south toward nwrn ca Friday into
Sunday. The 00z GFS and ECMWF showed good agreement with the
evolution of this trough... However, the 06z run of the GFS has
backed off on its southward extent. Thus, forecast uncertainty is
relatively high beyond Thursday/day 5.

Aviation Stratus just offshore the coast will push into the
coastal terminals this morning. Ifr ceilings are expected with
perhaps reduced vsbys in drizzle and mist. Conditions should
improve this afternoon as mixing increases, however MVFR ceilings
may linger into the afternoon hours. Coastal low clouds will
probably redevelop by mid evening as winds decouple.VFR will
continue to prevail through the period at kuki, though some
patches of low cloud will be possible along the mendocino coast.

Marine Light to moderate northerlies will prevail through the
forecast period. Scatterometer pass from yesterday indicated winds
from 20 to 25 kt over the waters south of CAPE mendo. The
advisory for small craft appears to be on track. North of cape
mendocino, winds have been lighter, however a brief northerly
surge will develop today after a front pushes across the pacific
northwest. North of CAPE mendo, winds will be marginal for an
advisory today with mostly gusts to 25 kt or so. Seas will
probably take til this evening to become large and steep again.

Northerly winds will ease north of the CAPE on Monday as another
front approaches the west coast and disrupts the offshore ridge.

South of CAPE mendo, north winds will remain in the 15 to 25kt
range to warrant an advisory through mid week.

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

Northwest california coastal waters... Small craft advisory from 2
pm this afternoon to 5 am pdt Monday for pzz455-470.

Small craft advisory until 5 am pdt Wednesday 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 mi77 min E 1.9 G 1.9 48°F 51°F1026.7 hPa
46244 - Humboldt Bay, North Spit, CA 10 mi62 min 54°F4 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 19 mi63 min N 12 G 14 51°F 53°F4 ft1025.9 hPa (+0.6)50°F
46213 - Cape Mendocino, CA (094) 46 mi61 min 53°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 mi60 minE 510.00 miOvercast44°F43°F96%1027 hPa
Fortuna Rohnerville Airport, CA18 mi58 minN 010.00 miFair43°F42°F100%1026.4 hPa

Wind History from ACV (wind in knots)
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Last 24hrCalmCalmNW4NW5W7NW9NW12NW13
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NW16NW17NW12N8NW6CalmNW3CalmCalmCalmE4CalmE3E3E5
1 day agoCalmCalmNW7NW14N13
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NW13NW15NW10NW7N8CalmSE4SE5E5E4E4E3E4CalmCalm
2 days agoE3CalmNW6NW13NW15NW13NW17NW18
G24
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N16N9N9N7NE5NE4N6N5E4CalmCalmCalmE3E4

Tide / Current Tables for Eureka, Humboldt Bay, California
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Eureka
Click for Map
Sun -- 12:05 AM PDT     Moonset
Sun -- 03:19 AM PDT     7.74 feet High Tide
Sun -- 06:15 AM PDT     Sunrise
Sun -- 10:00 AM PDT     -1.37 feet Low Tide
Sun -- 10:11 AM PDT     Moonrise
Sun -- 05:02 PM PDT     5.92 feet High Tide
Sun -- 08:12 PM PDT     Sunset
Sun -- 09:58 PM PDT     2.53 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.86.17.27.77.56.54.72.60.6-0.8-1.4-0.90.21.73.24.65.65.95.64.73.72.92.52.9

Tide / Current Tables for Fields Landing, Humboldt Bay, California
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Fields Landing
Click for Map
Sun -- 12:05 AM PDT     Moonset
Sun -- 02:52 AM PDT     7.23 feet High Tide
Sun -- 06:16 AM PDT     Sunrise
Sun -- 09:51 AM PDT     -1.32 feet Low Tide
Sun -- 10:12 AM PDT     Moonrise
Sun -- 04:35 PM PDT     5.53 feet High Tide
Sun -- 08:12 PM PDT     Sunset
Sun -- 09:49 PM PDT     2.43 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.96.177.26.75.53.81.90.2-1-1.3-0.70.523.54.75.45.554.23.32.62.42.9

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 (10,2,3,4)
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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.