Wednesday, December11, 2019
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Marine Weather and Tides
Redwood Valley, 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 7:20AMSunset 4:51PM Wednesday December 11, 2019 2:04 PM PST (22:04 UTC) Moonrise 4:45PMMoonset 6:44AM Illumination 100% Phase: Full Moon; Moon at 15 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- 846 Am Pst Wed Dec 11 2019
.small craft advisory in effect from this evening through Friday evening...
Today..SE winds 10 to 20 kt. Waves se 7 ft at 7 seconds...and W 8 ft at 14 seconds. Chance of showers.
Tonight..SE winds 10 to 15 kt. Waves se 7 ft at 8 seconds... And W 12 ft at 16 seconds. Rain.
Thu..S winds 5 to 10 kt. Waves S 4 ft at 5 seconds...and W 15 ft at 18 seconds. Showers likely and rain.
Thu night..S winds 5 kt. Waves W 15 ft at 16 seconds.
Fri..NW winds 5 to 10 kt. Waves W 15 ft at 17 seconds.
Sat..NW winds 10 to 15 kt. Waves nw 11 ft at 15 seconds.
Sun..N winds 5 kt. Waves nw 12 ft at 13 seconds.
PZZ400 846 Am Pst Wed Dec 11 2019
Synopsis for northern california waters..A stronger front will move through the waters late tomorrow bringing increased southerlies and steep seas to mainly the northern waters. A large, long period west to northwest swell is forecast to impact the waters on Thursday and Friday.


7 Day Forecast for Marine Location Near Redwood Valley, CA
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location: 39.28, -123.35     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 111322 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 522 AM PST Wed Dec 11 2019

SYNOPSIS. Weak high pressure will briefly provide most of northwest California with some dry weather for part of today, with fairly mild and overcast conditions otherwise. Wet weather will return in earnest by the end of the day, with periods of light to moderate rain continuing into the weekend.

DISCUSSION. In the wake of yesterday's passing front and light rainfall, widely scattered showers have lingered overnight, and a few spotty showers will continue into this morning. These will be mostly focused around Del Norte County and some of the higher southwest-facing mountainous terrain. Elsewhere, expect a mostly dry start to the day, but light rain will likely start filling back in from the northwest this afternoon. Most of our area will see at least a trace to a few hundredths of an inch by sunset, followed by steadier and somewhat heavier rain moving in for tonight. Otherwise it will be a cloudy and mild day with a more noticeable southerly breeze along the coast and over the ridgetops. Some exposed coastal mountain ridgetops will see gusts to 30 mph at times, but most areas will see much lighter winds.

Our next round of inclement weather will be driven by a strong westerly jet stream taking direct aim at the southern Oregon and northern California coast. A plume of low and mid-level moisture will also focus on our stretch of coast tonight, along with a decent shot of warm air advection helping force precipitation. The better moisture and forcing will not last long, with precipitation becoming lighter and more showery heading into Thursday. The exception might be over Del Norte County and into the southwest-facing ridges, where steadier rain will tend to linger on Thursday.

Tonight, most areas will see between a quarter and a half-inch of rainfall, with heavier amounts confined to the mountains. Between this evening and Friday evening, total rainfall will be around an inch or less along the Humboldt coast, with closer to 2 inches across Del Norte county and locally over 3 inches across the mountains of Del Norte. Meanwhile, southern Mendocino may only see a quarter inch.

For Friday, another shortwave will enhance the shower activity across our region, before the main axis of moisture begins shifting to our south. A more significant shortwave rotating around the strong upper-low in the Gulf of Alaska will then track southeastward and shift the jet-stream south, with colder air pushing in ahead of it. High temperatures Saturday will struggle to get into the low 50s even in the milder coastal spots. Snow levels Friday night will begin to fall, and may drop into the 3000 to 3500 ft range across the northern half of our area by the end of the day on Saturday. Precipitation with that shortwave passing by on Saturday and Saturday night looks lighter though, so snow amounts over the mountains should not be very impactful. Even places like Horse Mountain and Scott Mountain Summit may struggle to get more than a few inches.

The consensus of ensemble and deterministic guidance still points toward a progressive ridge giving us a period of dry weather from Sunday into early next week. The pattern continues to look rather progressive and potentially wet, though not terribly wet, for the middle and later portions of next week. /AAD

Aviation. Moderately impacted ceilings and scattered showers should weaken this morning before slowly intensify later today as yet another front approaches the coast this evening. MVFR ceilings should lower a hair later today, with rain and IFR ceilings possible across Northwestern California as the front moves onshore. Associated rain showers should continue through tonight, with ceilings and visibilities likely remaining MVFR to IFR in the heavier showers.

MARINE. Southerlies strengthen once again today as a front approaches from the west. These look to increase to SCY levels in the outers this afternoon, generating short period southerly seas around 7 ft at 7 seconds. Meanwhile, a W swell continues to slowly decay through the day before a new long period W swell is fills in late tonight. This leaves combined seas of 9 to 11 ft through early this afternoon before building to 12 to 16 ft across all zones. This new west swell will dominate the sea state from tomorrow through this weekend, peaking Thursday night around 16 ft at 17 seconds.

BEACH HAZARDS. A large, long-period west-northwest swell will build in late tonight into Thursday morning, resulting in large breaking waves along our beaches. Surf heights of 21 to 25 feet will be possible along west to northwest-facing beaches, highest between Punta Gorda and Crescent City. Have issued a High Surf Advisory starting early Thursday morning and continuing into Friday. The duration of the advisory is longer to the north of Cape Mendocino. Oceangoers will want to be extra cautious near the surf zone, and avoid rocks and jetties that jut out into the surf.

EKA WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory from 9 AM Thursday to 9 AM PST Friday for CAZ109.

High Surf Advisory from 3 AM Thursday to 3 PM PST Friday for CAZ101-103-104.

NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory from 9 PM this evening to 9 PM PST Friday for PZZ450-455.

Small Craft Advisory until 9 PM PST Friday 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 32 mi46 min ESE 8 G 11 57°F 54°F1020.8 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA13 mi68 minN 010.00 miLight Rain54°F51°F90%1021.9 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrS5S6S5CalmS8S9E3CalmS6S4E3CalmCalmCalmCalmCalmCalmCalmS3SE3CalmE3CalmCalm
1 day agoSW4SE7S74CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE3CalmCalmCalmSE4S5S4
2 days agoSW5CalmW4NW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3NW4N33CalmCalmCalm3

Tide / Current Tables for Albion, California
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Albion
Click for Map
Wed -- 03:40 AM PST     2.62 feet Low Tide
Wed -- 06:45 AM PST     Moonset
Wed -- 07:24 AM PST     Sunrise
Wed -- 09:39 AM PST     6.22 feet High Tide
Wed -- 04:40 PM PST     -0.72 feet Low Tide
Wed -- 04:47 PM PST     Moonrise
Wed -- 04:52 PM PST     Sunset
Wed -- 09:14 PM PST     Full Moon
Wed -- 11:43 PM PST     4.57 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.23.73.12.72.633.84.75.56.16.25.74.63.11.50.2-0.6-0.7-0.20.71.72.83.84.4

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
Click for Map
Wed -- 03:38 AM PST     2.62 feet Low Tide
Wed -- 06:46 AM PST     Moonset
Wed -- 07:24 AM PST     Sunrise
Wed -- 09:32 AM PST     6.22 feet High Tide
Wed -- 04:38 PM PST     -0.72 feet Low Tide
Wed -- 04:47 PM PST     Moonrise
Wed -- 04:52 PM PST     Sunset
Wed -- 09:14 PM PST     Full Moon
Wed -- 11:36 PM PST     4.57 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.23.73.12.72.73.13.84.75.66.16.25.64.52.91.40.1-0.6-0.7-0.20.71.82.93.94.5

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 (17,4,5,8)
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Ground Weather Radar Station Beal AFB, 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.