Saturday, July11, 2020
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Marine Weather and Tides
Trinidad, 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 5:52AMSunset 8:51PM Friday July 10, 2020 10:53 PM PDT (05:53 UTC) Moonrise 11:27PMMoonset 10:23AM Illumination 68% Phase: Waning Gibbous; Moon at 20 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- 859 Pm Pdt Fri Jul 10 2020
Tonight..NW winds 5 to 10 kt. Waves nw 5 ft at 5 seconds. Patchy fog.
Sat..N winds 5 to 15 kt. Waves N 5 ft at 5 seconds. Patchy fog.
Sat night..N winds 5 to 15 kt. Waves N 5 ft at 5 seconds.
Sun..N winds 10 to 15 kt. Waves N 5 ft at 5 seconds.
Sun night..N winds 10 to 15 kt. Waves nw 6 ft at 7 seconds.
Mon..N winds 10 to 20 kt. Waves N 7 ft at 7 seconds.
Tue..N winds 10 to 20 kt. Waves N 7 ft at 7 seconds.
Wed..N winds 10 to 20 kt. Waves N 5 ft at 8 seconds.
PZZ400 859 Pm Pdt Fri Jul 10 2020
Synopsis for northern california waters..Moderate to locally strong northerlies and steep seas will persist south of cape mendocino through this weekend. Winds will increase over the northern waters beginning early on Saturday.


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


Area Discussion for - Eureka, CA
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FXUS66 KEKA 102145 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 245 PM PDT Fri Jul 10 2020

SYNOPSIS. Hotter weather is expected in the interior this weekend and next week as strong high pressure aloft sets up across NW CA. Ocean breezes will keep coastal areas seasonably cool and cloudy at times. However light offshore looks possible toward the middle of next week allowing coastal areas to see sunnier skies and warmer daytime temperatures.

DISCUSSION. An upper ridge of high pressure, centered over the four corners region, will expand north and westward on Friday. The warmer air mass aloft should lead to a shallower and more compressed marine layer today through Saturday. This will result in more fog, perhaps dense at times, right near the shoreline. The fog and low cloud may linger into the afternoon hours near the shoreline north of Cape Mendocino again on Saturday with some clearing possible. Northerly winds south of the Cape will be sufficient to mix out the fog and low cloud. Stronger northerlies and offshore flow will likely erode the stratus Sunday into Monday. Temperatures will edge upward a few degrees over the weekend. Heat risk will increase to moderate levels early to mid next week as 850MB temperatures are projected to reach 22-25C which should yield highs around 98-105F in the hotter valleys of Lake, Trinity and interior Mendocino Counties. Thus considerations of localized Heat Advisories will need to be considered for Monday and Tues and possible Wed. Offshore flow should also propel temperatures into the lower to mid 90s in the valleys of Del Norte and Humboldt counties early to mid next week. Near coast area including Humboldt Bay could see highs near 70 or above during this period. Probability of 100F or more at Ukiah is 50-60% Mon and Tue. The probability of 95F or more at Hoopa is about 60% Tue and Wed. There is still about 3 to 5 degrees of spread from the blended ensemble mean. Temperatures will likely remain above normal in the interior through the end of next week. Looking at increased potential of a return of convective activity across the eastern interior zones late next week. At this time confidence is too low to introduce into the forecast but will continue to monitor.

AVIATION. IFR to LIFR conditions along most of the Del Norte, Humboldt and portions of the Mendocino coasts experienced marine stratus early today. Stratus and LIFR conditions have lingered near KACV with overcast and haze but should scatter out or slightly diminish later today. Similar conditions are expected at KCEC with a return of stratus tonight. Calm to light winds are expected overnight which could keep the conditions stratified and prime for much of the same Saturday at the coastal terminals. Gentle Breezes at KUKI today will ease to light air tonight with VFR conditions prevailing. /EYS


MARINE. Northerlies ranging from 15 to 25 knots will persist over portions of the southern waters through at least the weekend. A Small Craft Advisory is in place for the southern outer waters to cover these winds and the associated short-period seas. Winds will increase over the northern waters as the pressure gradient tightens tonight. Sustained winds will increase to 15 to 25 knots late on Sunday over the northern outer waters and will likely warrant an advisory. Both inner water zones will flirt with advisory criteria, especially around Point Saint George and Cape Mendocino. These zones will also be monitored by future shifts in case any advisories may be needed. Northerlies will remain elevated over the waters through the middle of next week.

EKA WATCHES/WARNINGS/ADVISORIES. CA . None. NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory until noon PDT Sunday for PZZ475.



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

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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
46244 - Humboldt Bay, North Spit, CA 16 mi57 min 56°F3 ft
HBYC1 - 9418767 - North Spit, CA 21 mi77 min 51°F1021 hPa
NJLC1 21 mi95 min NNW 12 G 14 55°F
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 33 mi133 min N 5.8 G 7.8 56°F 56°F1020.9 hPa55°F
CECC1 - 9419750 - Crescent City, CA 47 mi53 min NW 4.1 G 5.1 55°F 53°F1020.5 hPa (-0.0)

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 mi60 minN 410.00 miFair60°F50°F70%1020.9 hPa

Link to 5 minute data for KACV

Wind History from ACV (wind in knots)
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Last 24hrCalmCalmE3CalmCalmCalmCalmSE3E3CalmN3NW5W344NW8NW15NW18NW16
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NW14NW15--N11N4
1 day agoS4S5CalmSE3SE4CalmCalmSE5CalmCalmS5NW5NW7NW6W6NW12NW7NW9NW12NW17
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2 days agoN8N5CalmCalmCalmSE3SE3SE3E4CalmW44W5W5NW6NW9NW14
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Tide / Current Tables for Trinidad Harbor, California
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Trinidad Harbor
Click for Map
Sat -- 12:26 AM PDT     Moonrise
Sat -- 04:14 AM PDT     5.06 feet High Tide
Sat -- 05:54 AM PDT     Sunrise
Sat -- 10:49 AM PDT     0.84 feet Low Tide
Sat -- 12:23 PM PDT     Moonset
Sat -- 05:40 PM PDT     5.65 feet High Tide
Sat -- 08:49 PM PDT     Sunset
Sat -- 11:50 PM PDT     2.48 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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33.54.24.85.14.94.43.52.51.610.91.2234.155.55.65.34.63.83.12.6

Tide / Current Tables for Mad River Slough, Arcata Bay, Humboldt Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (1,6,7,8)
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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 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.