Sunday, January17, 2021
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Marine Weather and Tides
Trinidad, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:36AMSunset 5:17PM Sunday January 17, 2021 11:29 AM PST (19:29 UTC) Moonrise 10:38AMMoonset 10:13PM Illumination 19% Phase: Waxing Crescent; Moon at 4 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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PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 836 Am Pst Sun Jan 17 2021
.small craft advisory in effect until 4 pm pst this afternoon...
.hazardous seas warning in effect from 4 pm pst this afternoon through Monday morning...
Today..N winds 10 to 20 kt. Gusts up to 30 kt. Waves N 13 ft at 10 seconds...and W building to 9 ft at 21 seconds.
Tonight..N winds 15 to 25 kt. Waves N 13 ft at 10 seconds... And W 13 ft at 19 seconds.
Mon..N winds 10 to 20 kt. Waves N 12 ft at 10 seconds...and W 12 ft at 18 seconds.
Mon night..N winds 10 to 20 kt. Waves N 9 ft at 9 seconds... And W 9 ft at 16 seconds.
Tue..NE winds 5 to 15 kt. Waves N 5 ft at 7 seconds...and W 5 ft at 14 seconds.
Wed..N winds 5 to 10 kt. Waves N 6 ft at 7 seconds...and W 7 ft at 16 seconds.
Thu..NW winds 5 to 15 kt. Waves W 11 ft at 13 seconds.
PZZ400 836 Am Pst Sun Jan 17 2021
Synopsis for northern california waters..Gale force northerly winds will develop this afternoon and evening over the outer waters. Steep hazardous seas will subsequently spread toward the coast this evening through Monday morning. Winds may weaken during Wednesday, but that will be followed by another period of gusty north winds during the second half of the upcoming work week.


7 Day Forecast for Marine Location Near Trinidad, CA
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location: 41.06, -124.14     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 171110 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 310 AM PST Sun Jan 17 2021

SYNOPSIS. Dry weather will prevail through the middle of the upcoming week. Offshore flow through Tuesday will result in warm days and cool nights in the valleys, with locally strong winds over exposed mountainous terrain. Precipitation may return towards the end of the week.

DISCUSSION. An upper level ridge remains over the West Coast this morning, promoting mainly clear skies across much of northwest California. Some locally dense fog is present once again along the Redwood Coast, but this should clear much more quickly today as drier air starts to take hold with increased offshore flow. The ridge will begin to flatten out with the approach of a weak shortwave this afternoon, resulting in an increase in high clouds across the area. Meanwhile, warm temperatures aloft will continue to support afternoon highs well into the 70s across interior Mendocino and Lake Counties, potentially putting a daily record in jeopardy at Ukiah.

The aforementioned shortwave feature will signal a transition to a much more amplified pattern beginning tonight as it strengthens and dives southward along the CA coast, with the strong ridge quickly strengthening offshore on Monday while a secondary wave dropping through the Great Basin digs a deep trough spanning from the intermountain west into southern CA. This will bring breezy offshore flow to NW CA through Tuesday, with a long-duration, strong wind event still expected at the higher elevations of Mendocino and Lake Counties. The details haven't changed much from previous forecast packages, with gusts to around 50 mph or slightly higher likely on exposed ridges. A Wind Advisory remains in effect from late this evening evening through Tuesday evening.

Winds will subside during the middle of the week as high pressure moves back overhead, followed by a cooler trend with increasing chances for precipitation as large scale troughing returns to the West Coast towards the end of the week. /CB

AVIATION. Patchy dense fog and stratus was occurring along the Humboldt and Del Norte coast early Sunday morning. However, winds above the surface are beginning to take on an offshore component, and that trend will continue during the rest of Sunday. Drier air will subsequently spread out across the coast and aid in dissipating stratus and fog. Light to moderate low-level wind shear will also become probable tonight as northeast winds at 2000 feet ASL strengthen to 20+ kt.

Garner

MARINE. A series of long period west-northwest swells will impact the coastal waters through the next week. Seas will remain somewhat chaotic and hazardous as a result. Hazardous seas will be particularly likely tonight as gale force northerlies develop over the outer waters. Steep hazardous seas over the outer waters will subsequently propagate toward the immediate coast and support a hazardous seas warning from Sunday evening through Monday morning. Otherwise, gusty north winds may briefly weaken during Wednesday, and then restrengthen during Thursday and Friday.

Garner

FIRE WEATHER. An unseasonably strong offshore wind event remains on track to impact the southern reaches of the area from tonight into Tuesday, mainly impacting the mountain ridges and exposed high terrain above 2000 feet across interior Mendocino and Lake Counties. Hi-Res model guidance continues to support gusts near and possibly exceeding 50 mph at times on exposed ridges. Despite the expected dry and windy conditions, recent rainfall will help to keep fuel moisture in check which should be enough to preclude more widespread fire weather concerns. However, expect these winds to be accompanied by increasingly low humidity Monday into Tuesday, with poor recoveries only in the 20 to 35 percent range across the ridges, and afternoon humidity in the teens or low twenties. Winds will ease with a gradually higher humidities through mid to late week, along with cooler temperatures. /CB/AAD

BEACH HAZARDS. A long period swell will impact west facing beaches through Monday. That swell will aid in a slight risk for sneaker waves today, and hazardous surf during Monday.

Garner

EKA WATCHES/WARNINGS/ADVISORIES. CA . Wind Advisory from 10 PM this evening to 10 PM PST Tuesday for CAZ110-111-113>115.

NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory until 4 PM PST this afternoon for PZZ450- 455-470.

Hazardous Seas Warning from 4 PM this afternoon to 10 AM PST Monday for PZZ450-455.

Gale Warning from 4 PM this afternoon to 10 PM PST Monday for PZZ470.

Small Craft Advisory until 1 AM PST Monday for PZZ475.

Gale Warning from 1 AM to 10 PM PST Monday for PZZ475.



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
TDPC1 1 mi59 min 52°F
46244 - Humboldt Bay, North Spit, CA 16 mi63 min 53°F8 ft
HBXC1 20 mi59 min 52°F
HBYC1 - 9418767 - North Spit, CA 21 mi53 min 53°F1025.5 hPa
NJLC1 21 mi65 min N 7.8 G 9.7 49°F
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 30 mi49 min N 9.7 G 14 53°F 53°F1024.8 hPa51°F
CECC1 - 9419750 - Crescent City, CA 47 mi59 min N 9.9 G 12 61°F 52°F1025.8 hPa

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, CA5 mi36 minN 38.00 miFair53°F49°F86%1025.5 hPa

Link to 5 minute data for KACV

Wind History from ACV (wind in knots)
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Last 24hrNW8W4S6S5W3S4S4S3E3CalmCalmNE3CalmCalmSE3E4CalmE4E3CalmCalmE3N6N3
1 day agoCalmS3W3W4CalmE3W5NE3E4CalmCalmS4S3S3CalmCalmCalmCalmNE3CalmCalmCalmCalmNW7
2 days agoCalmW65NW4NW7E5CalmCalmE6SE3E4CalmCalmCalmE3SE3CalmCalmE3NE3E6E4N8N4

Tide / Current Tables for Trinidad Harbor, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Trinidad Harbor
Click for Map
Sun -- 02:54 AM PST     6.32 feet High Tide
Sun -- 07:38 AM PST     Sunrise
Sun -- 08:29 AM PST     2.99 feet Low Tide
Sun -- 10:37 AM PST     Moonrise
Sun -- 02:05 PM PST     6.24 feet High Tide
Sun -- 05:15 PM PST     Sunset
Sun -- 08:47 PM PST     0.56 feet Low Tide
Sun -- 10:14 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.95.26.16.365.24.33.53.13.13.54.35.25.96.265.242.71.50.80.612

Tide / Current Tables for Arcata Wharf, Humboldt Bay, California
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Arcata Wharf
Click for Map
Sun -- 04:05 AM PST     6.16 feet High Tide
Sun -- 07:37 AM PST     Sunrise
Sun -- 09:33 AM PST     2.90 feet Low Tide
Sun -- 10:37 AM PST     Moonrise
Sun -- 03:06 PM PST     6.29 feet High Tide
Sun -- 05:16 PM PST     Sunset
Sun -- 09:57 PM PST     0.27 feet Low Tide
Sun -- 10:14 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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23.54.95.86.25.95.34.43.5333.54.35.266.36.15.34.22.81.50.60.30.7

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
Ground Weather Radar Station




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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.