Monday, December9, 2019
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Marine Weather and Tides
Mendocino, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:18AMSunset 4:51PM Sunday December 8, 2019 11:56 PM PST (07:56 UTC) Moonrise 3:02PMMoonset 3:39AM Illumination 93% Phase: Waxing Gibbous; Moon at 12 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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PZZ455 Cape Mendocino To Pt Arena Out 10 Nm- 818 Pm Pst Sun Dec 8 2019
Tonight..NE winds 5 to 10 kt. Waves W 6 ft at 8 seconds...and nw 5 ft at 16 seconds.
Mon..NE winds 5 kt...becoming w. Waves sw 3 ft at 7 seconds... And nw 6 ft at 15 seconds.
Mon night..SE winds 5 to 10 kt. Waves nw 7 ft at 15 seconds.
Tue..SE winds 5 to 10 kt. Waves S 2 ft at 5 seconds...and W 8 ft at 15 seconds.
Tue night..SE winds 5 to 10 kt. Waves S 4 ft at 5 seconds... And W 10 ft at 16 seconds.
Wed..SE winds 5 to 10 kt. Waves S 4 ft at 6 seconds...and W 8 ft at 16 seconds.
Thu..SE winds 5 to 10 kt. Waves S 4 ft at 7 seconds...and W 15 ft at 18 seconds.
Fri..SW winds 5 to 10 kt. Waves nw 8 ft at 18 seconds.
PZZ400 818 Pm Pst Sun Dec 8 2019
Synopsis for northern california waters..Lower winds and seas will continue through Monday before the next frontal boundary brings moderate south winds and building seas on Tuesday. A large, long period west-northwesterly swell is forecast to impact the waters on Thursday and Friday.


7 Day Forecast for Marine Location Near Mendocino, CA
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location: 39.3, -123.8     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 082256 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 256 PM PST Sun Dec 8 2019

SYNOPSIS. Dry and mild weather is expected tonight and Monday, with some patchy valley fog lingering through Monday morning. A weak front will bring light rain back to the area on Tuesday, with mild but showery weather continuing through much of the remainder of the week.

DISCUSSION. Precipitation has mostly come to an end across northwest California this afternoon as the upper level trough departs to the southeast, with just a few weak showers lingering over the higher terrain of Trinity and eastern Mendocino Counties. A highly amplified ridge building over the west coast tonight will support mainly dry and mild conditions through Monday. More extensive cloud cover may linger along the coast tonight, but partial clearing over the interior coupled with abundant low level moisture from the recent rainfall will likely support widespread fog development over the interior valleys through Monday morning. Otherwise, mostly sunny skies will prevail across much of the area during the day on Monday. This period of dry weather will be relatively short lived as the ridge is bisected by another shortwave approaching the BC/WA coast early in the week, which will allow a weak upper disturbance and corresponding front to move across northern CA on Tuesday. Rainfall amounts with this next system look to be limited to a few tenths of an inch between Tuesday afternoon and early Wednesday morning, with no strong winds expected. A zonal flow pattern will then become established over the area for the latter half of the week, with a series of embedded waves providing occasional chances for rain into next weekend. This could amount to an additional few inches of rain across the northern extent of the area between Wednesday night and Saturday, with lower amounts farther south. That said, no major weather impacts are expected across the area over the next seven days. /CB

AVIATION. Low clouds continue to afflict northwest California airfields with MVFR ceilings expected to filter in and out through the remainder of the day. Conditions will deteriorate tonight along coastal areas and interior valleys as fog settles in and causes ceiling and visibility restrictions. Winds will remain generally lighter and northerly through the TAF period. However, eddies in the low-level flow will result in periods of southerly winds, especially for KCEC. Come Monday, expect VFR conditions with high ceilings possible. KMZ

MARINE. Building high pressure will cause lower winds and seas to to continue in northwest California waters through at least Monday. Then an approaching frontal boundary will bring moderate southerly winds for Tuesday. Small craft advisories will be likely with wind gusts approaching 25 kt offshore and steep seas reaching 8 to 12 feet. The weather pattern will remain unsettled through the rest of the week with additional weather systems bringing the potential for rain. This means moderate southerly winds will continue through the rest of the work week before increasing north winds return over the weekend. The sea state over the next few days will be comprised of various mid-period swells from the southwest to northwest as well as wind-driven waves with the frontal passage on Tuesday. In addition, there is a significant WNW swell forecast to impact northwest California on Thursday and Friday. The sea state will build rapidly on Thursday and peak Friday morning around 16 feet at 18 seconds. A hazardous seas warning may be necessary if the forecast remains on track. This swell could create dangerous conditions in the harbor channel so stay tuned to the forecast. KMZ

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
46014 - PT ARENA - 19NM North of Point Arena, CA 10 mi37 min NNW 7.8 G 9.7 55°F 55°F1020.3 hPa54°F
ANVC1 - 9416841 - Arena Cove, CA 27 mi63 min NNE 1 G 4.1 49°F 54°F1020.5 hPa

Wind History for Arena Cove, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA34 mi2 hrsN 07.00 miFair47°F45°F93%1020 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrSE3CalmS4CalmS4S5CalmN3CalmCalmCalmCalmCalmCalmSW5CalmW4NW4CalmCalmCalmCalmCalmCalm
1 day agoS7SE8S5SE11S10
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Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
Click for Map
Mon -- 02:21 AM PST     2.16 feet Low Tide
Mon -- 04:39 AM PST     Moonset
Mon -- 07:23 AM PST     Sunrise
Mon -- 08:26 AM PST     5.91 feet High Tide
Mon -- 03:29 PM PST     0.04 feet Low Tide
Mon -- 03:31 PM PST     Moonrise
Mon -- 04:51 PM PST     Sunset
Mon -- 10:04 PM PST     4.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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32.52.22.32.83.64.55.45.95.85.34.22.91.60.60.10.10.61.42.43.344.34.2

Tide / Current Tables for Point Cabrillo, California Current
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Point Cabrillo
Click for Map
Mon -- 12:04 AM PST     -0.70 knots Max Ebb
Mon -- 03:27 AM PST     0.00 knots Slack
Mon -- 04:39 AM PST     Moonset
Mon -- 06:20 AM PST     0.80 knots Max Flood
Mon -- 07:23 AM PST     Sunrise
Mon -- 09:15 AM PST     -0.00 knots Slack
Mon -- 12:23 PM PST     -1.28 knots Max Ebb
Mon -- 03:31 PM PST     Moonrise
Mon -- 04:24 PM PST     0.00 knots Slack
Mon -- 04:51 PM PST     Sunset
Mon -- 07:22 PM PST     0.96 knots Max Flood
Mon -- 10:35 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.6-0.4-0.20.20.60.80.80.50.1-0.4-1-1.3-1.2-1-0.7-0.20.30.70.90.90.70.3-0.2

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Eureka, CA (2,6,7,8)
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Ground Weather Radar Station Eureka, CA
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weather_mapweather_map weather_map

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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 numerious 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.