Tuesday, December10, 2019
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Marine Weather and Tides
Boonville, 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 7:19AMSunset 4:51PM Tuesday December 10, 2019 3:01 AM PST (11:01 UTC) Moonrise 4:06PMMoonset 5:40AM Illumination 98% 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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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 208 Am Pst Tue Dec 10 2019
Today..SE winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 4 to 6 ft at 15 seconds and S around 2 ft at 16 seconds. A chance of rain this afternoon.
Tonight..SE winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. W swell 6 to 8 ft at 15 seconds and S around 2 ft at 15 seconds. A chance of rain.
Wed..SE winds 10 to 15 kt. Wind waves 2 to 3 ft. W swell 7 to 8 ft at 15 seconds and S around 2 ft at 15 seconds. A slight chance of rain.
Wed night..SE winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 6 to 8 ft at 16 seconds. A chance of rain.
Thu..SE winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 9 to 11 ft at 19 seconds. A chance of rain.
Thu night..S winds up to 10 kt. Wind waves 1 ft. W swell 13 to 15 ft at 17 seconds. A chance of rain.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 12 to 14 ft. A chance of rain.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 8 to 10 ft. A chance of rain.
PZZ500 208 Am Pst Tue Dec 10 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light winds will persist over the coastal waters as a weak system approaches. A weak cold front will turn winds southerly today and bring a chance of showers this evening and into Wednesday. Light to moderate southerly winds will then continue through much of the week before shifting back out of the northwest towards the weekend. Moderate northwest swell will also persist before a longer period northwest swell arrives on Thursday. Wave heights will gradually build heading into the coming weekend creating hazardous seas conditions, particularly for smaller vessels.

7 Day Forecast for Marine Location Near Boonville, CA
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location: 38.89, -123.38     debug

Area Discussion for - Eureka, CA
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FXUS66 KEKA 092252 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 252 PM PST Mon Dec 9 2019

SYNOPSIS. A weak front will bring light rain to Northwest California Tuesday, followed by a brief period of high pressure on Wednesday, before an extended bout of wet weather begins on Wednesday night.

DISCUSSION. Visible imagery this morning showed interior valley fog was a bit more stubborn to clear out today. Though by late morning, most areas saw at least localized clearing, with the exception being in northern Trinity and northeast Humboldt counties where the valley fog has hung around into the early afternoon hours. Most of the Mendocino coast has been socked in all day and should persist the rest of the day, with only localized clearing possible. Dry conditions will prevail across the region through around midday on Tuesday as a weakening cold front approaches the area. As a result, light rain will spread into Northwest California Tuesday afternoon and evening. Overall totals are expected to be marginal, with the most favorable orographic areas only receiving around a half an inch. High pressure will build back into the region aloft early on Wednesday, bringing dry conditions back to the area as zonal mid-level flow develops. This moist zonal flow will allow for several weak impulses to move through the region, bringing several bouts of mostly light rain through early on Friday. Overall, these weak disturbances should be mostly benign, bringing mostly light winds and generally light rain.

AVIATION. Many parts of northwest California observed clearing skies with the exception of the Mendocino coast and some interior valleys. VFR should prevail for most areas through the evening but some MVFR ceilings will not be out of the question for valleys and parts of the coast late tonight. Meanwhile, an approaching storm system will bring mid to upper cloud cover across northwest California and generally light south winds tonight. Light rain will impact coastal airfields mid to late Tuesday morning and interior locations by the afternoon. Conditions will deteriorate to MVFR, possibly IFR at times, with the arrival of the rain and south- southeasterly winds will increase to near 10kt. KMZ

MARINE. Lower winds and seas will continue across northwest California waters tonight. An approaching frontal boundary will bring fresh southerly winds on Tuesday. Small craft advisories remain in effect for Tuesday with wind gusts approaching 25 kt offshore and steep seas reaching 8 to 11 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 and west winds return over the weekend. There is significant WNW swell forecast to impact the coastal waters on Thursday and Friday. The sea state will build rapidly on Thursday and Friday around 16 feet at 17 seconds. A hazardous seas warning may be necessary if the forecast remains on track. This swell could create dangerous conditions for mariners traversing the bar. EYS

EKA WATCHES/WARNINGS/ADVISORIES. CA . None. NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory from 9 AM to 9 PM PST Tuesday for PZZ470- 475.



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 18 mi56 min NE 2.9 G 4.1 50°F 54°F1024.5 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 39 mi22 min E 1.9 G 3.9 52°F 56°F1023.7 hPa50°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 44 mi22 min E 5.8 G 7.8 52°F 55°F1024.4 hPa52°F

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, CA20 mi66 minN 010.00 miOvercast51°F46°F86%1024 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrCalmCalmCalmN3NW4N33CalmCalmCalm3SW4SE7S74CalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmS4S5CalmN3CalmCalmCalmCalmCalmCalmSW5CalmW4NW4CalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoSE11S10
G17		S9
G17		SE11S12
G20		S6
G14		S7S5S7
G16		S11
G18		S12
G21		S16
G26		SE8
G15		S6SE6SE6SE6SE4CalmS4S4SE3CalmS4
Tide / Current Tables for Arena Cove, California (2)
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Arena Cove
Click for Map
Tue -- 03:04 AM PST     2.50 feet Low Tide
Tue -- 05:41 AM PST     Moonset
Tue -- 07:22 AM PST     Sunrise
Tue -- 08:56 AM PST     6.18 feet High Tide
Tue -- 04:06 PM PST     Moonrise
Tue -- 04:07 PM PST     -0.40 feet Low Tide
Tue -- 04:52 PM PST     Sunset
Tue -- 10:49 PM PST     4.56 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.83.22.72.52.73.44.35.25.96.25.953.72.20.9-0-0.4-0.20.61.62.73.74.44.6
Tide / Current Tables for Point Arena, California Current
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Point Arena
Click for Map
Tue -- 12:58 AM PST     -0.69 knots Max Ebb
Tue -- 04:14 AM PST     0.00 knots Slack
Tue -- 05:41 AM PST     Moonset
Tue -- 07:06 AM PST     0.80 knots Max Flood
Tue -- 07:22 AM PST     Sunrise
Tue -- 09:58 AM PST     -0.00 knots Slack
Tue -- 01:13 PM PST     -1.38 knots Max Ebb
Tue -- 04:07 PM PST     Moonrise
Tue -- 04:52 PM PST     Sunset
Tue -- 05:12 PM PST     0.00 knots Slack
Tue -- 08:11 PM PST     1.03 knots Max Flood
Tue -- 11:31 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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-0.6-0.7-0.6-0.4-0.10.30.60.80.70.4-0-0.6-1.1-1.4-1.3-1-0.6-0.10.40.9110.70.3
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 (6,6,7,8)
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Ground Weather Radar Station Sacramento, 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 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.