Monday, October18, 2021
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Marine Weather and Tides
Trinidad, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:30AMSunset 6:32PM Monday October 18, 2021 12:17 PM PDT (19:17 UTC) Moonrise 5:05PMMoonset 4:26AM Illumination 94% Phase: Waxing Gibbous; Moon at 13 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- 913 Am Pdt Mon Oct 18 2021
.small craft advisory in effect from Tuesday morning through Wednesday morning...
Today..SW winds 5 kt. Waves W 8 ft at 12 seconds.
Tonight..S winds 5 to 10 kt. Waves nw 8 ft at 12 seconds.
Tue..S winds 10 to 20 kt. Waves nw 7 ft at 11 seconds. A chance of rain.
Tue night..S winds 15 to 25 kt. Waves S 7 ft at 8 seconds... And W 6 ft at 14 seconds.
Wed..S winds 10 to 15 kt. Waves W 11 ft at 14 seconds.
Thu..S winds 10 to 20 kt. Waves S 6 ft at 7 seconds...and W 8 ft at 14 seconds.
Fri..S winds 5 to 10 kt. Waves W 15 ft at 15 seconds.
PZZ400 913 Am Pdt Mon Oct 18 2021
Synopsis for northern california waters..Light winds this morning will shift back to southerly and increase later this afternoon and evening ahead of the next front. Southerly gales are expected for the outer waters Tuesday afternoon into Wednesday morning.


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 181311 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 611 AM PDT Mon Oct 18 2021

SYNOPSIS. Drier weather is forecast today through most of Tuesday. A front will generate gusty southerly winds Tuesday afternoon through Tuesday night. Most of the rain with this front will arrive Tuesday night and Wednesday morning. A wet and active weather pattern will continue through the weekend and probably into early next week.

DISCUSSION. Isolated light showers continued early this morning in moist northwesterly flow on the backside of an upper low over the northern Great Basin. Upper ridging will build over the area this afternoon bringing drying and an end to the showers. Winds tonight will not be sufficient to scour out shallow moist air in the interior river valleys and valley fog will form. Dry weather should last through most of Tuesday as southerly winds steadily increase. Southerly winds will increase Tuesday afternoon and become gusty in advance of the front. High resolution models have been trending toward windier conditions, with gusts to 45-55 mph over the higher elevations of Humboldt County. Winds appear to peak late Tuesday evening or just after midnight. A wind advisory for gusts to 50 mph will need to be considered.

Higher rain amounts are expected for southern Mendocino and Lake counties Tuesday night through Wednesday morning with this front. Latest guidance indicates 24 hour amounts from 0.50in to 0.75in in SE Mendo and Lake Counties. We may see a break in the precip Wed afternoon/evening as a ridge builds in advance of the next trough. Periods of light rain will probably redevelop for Mendo and Lake Counties by early Thur morning as southerly upslope flow increases in advance of the next front. Models were not in great agreement with the passage and timing of the 500mb shortwave, however the ensembles and national blend of models continue to indicate at least a moderate rain maker, over 0.50in in 24 hours for much the area, with high chances for 1 inch or more over Del Norte/northern Humboldt Counties Thu PM through Fri AM.

Another break in the wet weather is possible later on Friday, however the weekend is looking wet and possibly windy at times. Rain on the order of inches in 24 hours is expected this weekend. Confidence is high with ensemble moisture plumes and national blend of models remaining consistent every run. There is considerable uncertainty on timing. If the wet weather continues into mid next week (Oct 27), we will be near or above normal for the month of October.

AVIATION. By the early morning hours, the lower clouds were beginning to scatter out after the passing of a front. Nighttime fog products were showing hints of inland radiational fog attempting to develop due to the recent rains, though there were still a good bit of mid-level clouds in the mix. Visibilities have periodically been dropping at the coastal terminals this morning due to the these radiational effects, especially at KCEC. Mostly VFR conditions will win out later this morning, with light winds. Southerly winds will begin picking up by Tuesday morning, and will turn quite gusty later Tuesday afternoon and night.

MARINE. Winds over the waters eased overnight after the passing of a cold front. This trend will continue today until later this afternoon and evening when southerlies will begin picking up. Small Craft Advisory level winds will begin quickly filing in from the west into the outer waters by early tomorrow morning. Hoisted Small Craft Advisories this package to cover the outer waters. By noon tomorrow, gale-strength southerlies will take over in the outer zones where the watches have been upgraded to Gale Warnings. Recent model runs have been nudging the stronger winds farther toward the coast, so went ahead with Small Craft Advisories for the inners later Tuesday morning. The gales look to just hang west along the borders of the inner waters, but will penetrate the inners around, and areas just north and south of the cape. Winds will be strongest in the Northern Outer waters, where gusts to 49kts to isolated 50kts will occur. Some thunderstorms may develop late Tuesday night and early Wednesday morning over mostly the outer waters, and could mix down some of the stronger winds above the surface. The southerlies will weaken Wednesday, but will likely remain gusty before increasing Thursday again ahead of another front. This pattern will likely continue into the weekend.

EKA WATCHES/WARNINGS/ADVISORIES. CA . None. NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory from 9 AM Tuesday to 8 AM PDT Wednesday for PZZ450-455.

Small Craft Advisory from 3 AM to noon PDT Tuesday for PZZ470.

Gale Warning from noon Tuesday to 3 AM PDT Wednesday for PZZ470.

Small Craft Advisory from 3 AM to 3 PM PDT Tuesday for PZZ475.

Gale Warning from 3 PM Tuesday to midnight PDT Tuesday night for PZZ475.



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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
TDPC1 1 mi48 min 50°F
46244 - Humboldt Bay, North Spit, CA 16 mi22 min 53°F10 ft
HBXC1 20 mi48 min 51°F
HBYC1 - 9418767 - North Spit, CA 21 mi42 min 52°F1017.9 hPa
NJLC1 21 mi54 min WSW 5.1G6 51°F
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 30 mi28 min S 5.8G7.8 51°F 1017.4 hPa50°F
CECC1 - 9419750 - Crescent City, CA 47 mi48 min S 2.9G4.1 51°F 52°F1017.5 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 mi25 minWSW 75.00 miFog/Mist52°F48°F86%1017.9 hPa

Link to 5 minute data for KACV

Wind History from ACV (wind in knots)
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Last 24hrSW12
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S5S4S6S5W80SW4S5SW3SE3S6S40SW3N40E300--00SW7
1 day agoW6NW4NW4S3W300E400E300E3E40E6SE4N3E6E4S7SE10
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2 days agoNW7NW5NW7NW6S3S7SE5NW40E3E3NE3E400E4E30E3E30--NW4NW5

Tide / Current Tables for Trinidad Harbor, California
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Trinidad Harbor
Click for Map
Mon -- 04:48 AM PDT     0.76 feet Low Tide
Mon -- 05:26 AM PDT     Moonset
Mon -- 07:32 AM PDT     Sunrise
Mon -- 11:09 AM PDT     6.63 feet High Tide
Mon -- 05:22 PM PDT     1.05 feet Low Tide
Mon -- 06:04 PM PDT     Moonrise
Mon -- 06:30 PM PDT     Sunset
Mon -- 11:24 PM PDT     6.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.5
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4.4
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1.8
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Tide / Current Tables for Arcata Wharf, Humboldt Bay, California
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Arcata Wharf
Click for Map
Mon -- 05:26 AM PDT     Moonset
Mon -- 05:56 AM PDT     0.65 feet Low Tide
Mon -- 07:31 AM PDT     Sunrise
Mon -- 12:19 PM PDT     6.89 feet High Tide
Mon -- 06:04 PM PDT     Moonrise
Mon -- 06:29 PM PDT     1.21 feet Low Tide
Mon -- 06:30 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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