Tuesday, March31, 2020
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Marine Weather and Tides
Manchester, 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 6:56AMSunset 7:37PM Tuesday March 31, 2020 9:23 AM PDT (16:23 UTC) Moonrise 10:30AMMoonset 12:51AM Illumination 51% Phase: First Quarter Moon; Moon at 7 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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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 843 Am Pdt Tue Mar 31 2020
.small craft advisory in effect from 3 pm pdt this afternoon through late Wednesday night...
Today..W winds 5 to 10 kt, becoming nw 10 to 20 kt with gusts up to 30 kt this afternoon. Wind waves 2 to 3 ft. NW swell 6 to 8 ft at 11 seconds. A slight chance of showers this morning.
Tonight..NW winds 20 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. NW swell 7 to 9 ft at 12 seconds.
Wed..NW winds 20 to 30 kt with gusts up to 40 kt. Wind waves 6 to 7 ft. NW swell 6 to 8 ft at 12 seconds and S around 2 ft at 19 seconds.
Wed night..NW winds 20 to 30 kt with gusts up to 40 kt. Wind waves 6 to 7 ft. NW swell 5 to 7 ft at 12 seconds.
Thu..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. NW swell 4 to 6 ft at 11 seconds and S around 2 ft at 18 seconds.
Thu night..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 5 to 6 ft. NW swell 3 to 5 ft at 10 seconds and S around 2 ft at 17 seconds.
Fri..NW winds 10 to 20 kt. Wind waves 4 to 5 ft. Mixed swell nw 3 to 4 ft and S around 2 ft. A chance of showers.
Sat..W winds 5 to 10 kt. Wind waves 3 to 4 ft. NW swell 3 to 5 ft and S around 2 ft. A chance of showers.
PZZ500 843 Am Pdt Tue Mar 31 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will increase this afternoon through Wednesday night as a low pressure system moves inland over the pacific northwest. The waters off the big sur coast will likely see some gale-force winds and/or gusts. Additionally, can't rule out some isolated gale-force gusts for the outer waters north of point pinos. Mixed swell will persist with a moderate northwest swell and a light southwesterly swell.


7 Day Forecast for Marine Location Near Manchester, CA
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location: 38.95, -123.73     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 311057 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 357 AM PDT Tue Mar 31 2020

SYNOPSIS. Another round of rain is expected this morning with some lingering showers in the afternoon and evening. Dry and chilly weather is expected Wednesday and Thursday mornings with another chance for rain late Friday and into the weekend.

DISCUSSION. An upper level trough moving into British Columbia/Washington state with moist zonal flow to south bringing some rain to northern CA and Oregon. Water vapor sat and the models show another wave moving through this morning bringing some more rain to areas north of Mendocino county. This is expected to bring another tenth to a half inch of rain. Snow levels are over 5,000 feet with this wave as well. This afternoon and evening snow levels will drop to 3,000 feet in the north, but there is only expected to be a few showers around by this point. Tonight with recent rain there will be quite a bit of moisture around and as areas this clear out, they will see fog develop in the valleys. This, combined with the fact that the airmass is not all that cold, don't expect frost tonight in most areas. The exception may be Trinity county which could see some in the colder spots. Wednesday skies are expected to clear as drier air moves in. This will set up Wednesday night into Thursday morning to be the coldest night of the week with temperatures in the upper 20s to mid 30s. Offshore flow will also help keep the coast clear and and allow for good radiational cooling. Frost advisories or freeze warnings will likely be needed for most areas (with the exception of Trinity county where the growing season hasn't stated yet).

Thursday inland temperatures expected continue to warm with highs climbing back into the 60s with sunshine. Thursday night into Friday morning could see some more frost, but it is expected to be less widespread as the airmass warms and there may be some high clouds around ahead of the next system. MKK

Long Term (Friday through Tuesday). Confidence is growing that we will see another rain event Friday night. At this point it still looks like we will see moderate rain spread across the area from Del Norte county to Lake county. The ensembles are in decent agreement on the rainfall amounts, although the exact timing could change slightly. The operational ECMWF is nearly 12 hours slower with most of the rain during the day on Saturday. Overall this system looks to bring mainly beneficial rain as the trajectory of the system is from the NW and doesn't have a strong moisture tap from the tropics. Snow levels looks to be generally over 4,000 feet.

There looks to be a short break in the rain late Saturday afternoon or evening with another system hot on it's heals for Sunday. Again confidence is low on the exact timing and strength, but growing on the potential for another system. This system has a bit more of a northerly trajectory and at this point looks like it may be colder. Snow levels in the north may drop to 3,000 feet or lower.

Early next weeks it looks like the wet pattern may continue with additional systems bringing rain. It also looks fairly cold for early April. MKK

AVIATION. The last in this series of fronts is forecast to exit the area this morning, with scattered showers and lifted ceilings following in its wake. Flying conditions are thus expected to generally improve as the day progresses, however pesky MVFR ceilings should persist through this afternoon. Low clouds and localized fog may develop in inland valleys overnight before more widespread clearing is expected during the day on Wednesday. /TDJ

MARINE. Gusty southerlies are expected to turn westerly and weaken early this morning an approaching front moves onshore. Winds should continue to clock around to northerly as the day progresses, then slowly accelerate this afternoon. A moderately fresh NW swell continues to build across the waters, and is expected to reach around 10 ft in the northern outers . and just shy of 10 ft everywhere else, leaving combined seas for today/Wednesday in the 9 to 10 ft range. Have lifted a SCY to cover the potentially hazardous seas in the northern outers today.

Northerly winds are currently expected to accelerate later this evening, generating short period northerly seas in response. Have lifted a SCY for the southern outers, starting this evening, to cover these winds . and have expanded it into the southern inners Wednesday morning as the pressure gradient tightens and the wind core shifts toward the coast. Localized gusts to 35 kt are possible Wednesday, particularly downwind of Cape Mendocino and near Pt Arena.

Northerlies should continue through late this week before breaking down as another system approaches the coast this weekend. Otherwise, after the current mid- period NW swell filters out late tomorrow, seas should be dominated by local, short- period wave generation through the rest of this week. /TDJ

EKA WATCHES/WARNINGS/ADVISORIES. CA . None. NORTHWEST CALIFORNIA COASTAL WATERS . None.

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
ANVC1 - 9416841 - Arena Cove, CA 3 mi54 min WNW 4.1 G 4.1 52°F 53°F1024.3 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 23 mi44 min WSW 5.8 G 7.8 52°F 52°F1023.9 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA31 mi28 minN 07.00 miLight Rain52°F48°F89%1023.3 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrS645S5SE6SW6W6S5S6S5SE3SE4S4S6S6S4CalmCalmSE3CalmCalmCalmCalmCalm
1 day agoCalmSE3SE8SE743SE4S44SE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE4
2 days agoCalmCalmCalm4S6SE6S3SE3SE3S3S3S4S3S4S4CalmCalmCalmE3N3CalmCalmCalmCalm

Tide / Current Tables for Point Arena, California
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Point Arena
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Tue -- 01:51 AM PDT     Moonset
Tue -- 03:40 AM PDT     5.02 feet High Tide
Tue -- 07:00 AM PDT     Sunrise
Tue -- 11:10 AM PDT     0.34 feet Low Tide
Tue -- 11:30 AM PDT     Moonrise
Tue -- 06:51 PM PDT     3.79 feet High Tide
Tue -- 07:38 PM PDT     Sunset
Tue -- 11:08 PM PDT     3.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.64.14.64.954.74.13.12.11.20.60.30.50.91.52.22.83.43.73.83.73.53.43.3

Tide / Current Tables for Point Arena, California Current
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Point Arena
Click for Map
Tue -- 01:51 AM PDT     Moonset
Tue -- 02:14 AM PDT     0.40 knots Max Flood
Tue -- 04:42 AM PDT     -0.00 knots Slack
Tue -- 07:00 AM PDT     Sunrise
Tue -- 08:31 AM PDT     -1.01 knots Max Ebb
Tue -- 11:30 AM PDT     Moonrise
Tue -- 12:38 PM PDT     0.00 knots Slack
Tue -- 03:42 PM PDT     0.68 knots Max Flood
Tue -- 07:22 PM PDT     -0.00 knots Slack
Tue -- 07:38 PM PDT     Sunset
Tue -- 09:17 PM PDT     -0.40 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.30.40.40.2-0.1-0.4-0.7-1-1-0.8-0.5-0.20.10.40.60.70.60.40.1-0.2-0.4-0.4-0.2

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Eureka, CA (12,3,4,5)
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Ground Weather Radar Station Sacramento, CA
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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.