Tuesday, January21, 2020
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Marine Weather and Tides
Samoa, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:34AMSunset 5:21PM Tuesday January 21, 2020 12:02 PM PST (20:02 UTC) Moonrise 4:58AMMoonset 2:34PM Illumination 12% Phase: Waning Crescent; Moon at 26 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 1119 Am Pdt Mon Sep 16 2019
.isolated strong Thunderstorms over the coastal waters... The areas affected include... Coastal waters from point saint george to cape mendocino ca out 60 nm... At 1114 am, doppler radar indicated a few strong Thunderstorms, capable of producing wind gusts to around 30 knots, from 5 nm northwest of orick to 45 nm west of patrick's point. These storms are moving southeast at 10 knots. 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 these storms passes. && lat...lon 4174 12416 4145 12406 4123 12411 4114 12416 4105 12415 4106 12414 4102 12411 4070 12426 4071 12426 4058 12435 4083 12572 4096 12565 4178 12460 4178 12426
PZZ400 830 Am Pst Tue Jan 21 2020
Synopsis for northern california waters..Southerly winds weaken and switch to southwesterly this morning. The current westerly swell will be significantly reinforced today. An active storm track across the ne pacific will drive hazardous seas through the remainder 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 211241 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 441 AM PST Tue Jan 21 2020

SYNOPSIS. A cold front will bring widespread rain and high elevation snow this morning, followed by showers this afternoon. Light rain will be possible Wednesday through Friday, mainly north of Cape Mendocino. Widespread rain is expected this weekend.

DISCUSSION. A frontal boundary was moving onto the North coast early this morning (4AM). The front will steadily move south and eastward through the early morning hours, producing a bout of moderate to heavy rain. Snow levels will fall to around 4000 to 4500 feet right behind the front. A period of heavy snow is expected for elevations above 4500 feet in Trinity county. A winter storm warning remains in effect through much of today for the northern Trinity county mountains. The main impact will be travel on route 3 at Scott Mountain Pass. Satellite imagery showed a well defined clear/dry slot offshore behind the front. The rain and showers will likely come to an end fairly quickly this afternoon and evening as this region of subsidence moves over the forecast area.

Overnight, winds have been gusty to 40 to 50 mph along of the Del Norte county coast and over the ridges of Humboldt county. The winds will switch to the SW and diminish quickly after frontal passage early this morning. We will let the wind advisory run til 6 am when it is set to expire.

A warm front may bring spats of light rain to primarily Del Norte and far northern Humboldt counties Wed and Thu. Otherwise ridging aloft and rising 500MB heights will likely result in dry weather for the remainder of the forecast area. Granted the warming aloft and light surface winds will be favorable for fog and low clouds in the interior valleys.

The potential for longer duration steady rain will increase over the weekend as a southwesterly fetch of moisture slowly transitions across the region. The weekend is shaping up to be a wet one, with snow levels above all the major passes in NW California. A period of heavy rain will be possible this weekend. There does not appear to be much of a break in the wet weather come early next week either.

AVIATION. A tight frontal boundary swept from north to south along the coast this morning, bringing short- lived MVFR conditions to most terminals. While the brunt of the rain is expected to pass quickly, weak scattered convective showers should persist across the region through this morning and possibly into the early afternoon. Thus flying conditions should remain on the borderline between VFR and MVFR through most of the morning before slowly improving as the day progresses. HOwever, another weak front may impact conditions at terminals to the north of Cape Mendocino late tonight and early tomorrow morning. /TDJ

MARINE. Southerly gales have rapidly diminished this morning as a front swept onshore. Winds behind this front should veer slightly southwesterly for most of the day and stay below advisory levels before switching back towards the south early Wednesday morning as another front approaches the coast. Winds should remain relatively southerly and fluctuate around low SCY levels for the foreseeable future.

Short period southerly seas filter out this morning in response to the weakening winds while the current west swell should be significantly reinforced today. Widespread combined seas of 15 to 17 ft are expected by this afternoon, primarily due to this building swell. Seas then quickly diminish for the next couple of days, potentially dropping below 10 ft for the inner and southern outers for Wednesday night and Thursday. Another long period west swell is expected to fill in late this week, elevating seas through at least the first half of this weekend. /TDJ

EKA WATCHES/WARNINGS/ADVISORIES. Wind Advisory until 6 AM PST early this morning for CAZ101-102-104>106. Winter Storm Warning until 3 PM PST this afternoon for CAZ107.

NORTHWEST CALIFORNIA COASTAL WATERS . Gale Warning until 5 AM PST early this morning for PZZ450. Small Craft Advisory until 3 PM PST Wednesday for PZZ470. Small Craft Advisory until 3 AM PST Wednesday for PZZ455-475.



Visit us at https://www.weather.gov/eureka

Follow us on Facebook and Twitter at: https://www.facebook.com/NWSEureka https://www.twitter.com/NWSEureka

For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HBYC1 - 9418767 - North Spit, CA 3 mi86 min 51°F1017.2 hPa
46244 - Humboldt Bay, North Spit, CA 11 mi32 min 52°F12 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 19 mi32 min S 14 G 18 52°F 52°F1016.9 hPa49°F
46213 - Cape Mendocino, CA (094) 46 mi32 min 52°F16 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 mi2.2 hrsSE 610.00 miOvercast48°F44°F86%1016.7 hPa

Link to 5 minute data for KACV

Wind History from ACV (wind in knots)
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Last 24hrCalmW8NW8W5SW454S4S16
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SE8W12CalmS4SE8SE6SE7SE6
1 day agoCalmNW4W5CalmCalmCalmCalmE4CalmE4CalmCalmCalmCalmCalmCalmE4CalmNE4E3E3CalmCalm3
2 days agoSE5SE4E4CalmSE4E5E5CalmE4CalmE3E5SE4S4CalmSE3SE3E4E3CalmS4E4CalmS4

Tide / Current Tables for Eureka, Humboldt Bay, California
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Eureka
Click for Map
Tue -- 02:33 AM PST     2.90 feet Low Tide
Tue -- 04:58 AM PST     Moonrise
Tue -- 07:35 AM PST     Sunrise
Tue -- 09:02 AM PST     7.84 feet High Tide
Tue -- 02:34 PM PST     Moonset
Tue -- 03:57 PM PST     -0.49 feet Low Tide
Tue -- 05:20 PM PST     Sunset
Tue -- 10:50 PM PST     5.46 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.43.6333.64.55.66.67.47.87.56.44.831.2-0.1-0.5-0.10.71.83.14.45.35.4

Tide / Current Tables for Fields Landing, Humboldt Bay, California
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Fields Landing
Click for Map
Tue -- 02:23 AM PST     2.95 feet Low Tide
Tue -- 04:58 AM PST     Moonrise
Tue -- 07:35 AM PST     Sunrise
Tue -- 08:41 AM PST     7.56 feet High Tide
Tue -- 02:35 PM PST     Moonset
Tue -- 04:02 PM PST     -0.73 feet Low Tide
Tue -- 05:20 PM PST     Sunset
Tue -- 10:46 PM PST     5.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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43.4333.64.65.76.77.47.575.84.22.40.7-0.3-0.7-0.40.51.83.24.355.2

Weather Map
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wmap_P
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Eureka, CA (15,3,4,5)
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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 numerous 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.