Friday, December13, 2019
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Marine Weather and Tides
Comptche, 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 7:22AMSunset 4:52PM Friday December 13, 2019 5:49 PM PST (01:49 UTC) Moonrise 6:30PMMoonset 8:50AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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- 231 Pm Pst Fri Dec 13 2019
.small craft advisory in effect through Sunday evening...
Tonight..NW winds 10 to 20 kt. Waves N 3 ft at 6 seconds... And W 14 ft at 17 seconds. Rain.
Sat..NW winds 5 to 15 kt. Waves nw 3 ft at 6 seconds...and nw 12 ft at 16 seconds. Showers likely.
Sat night..NW winds 5 to 15 kt. Waves nw 3 ft at 4 seconds... And nw 10 ft at 15 seconds. Chance of showers.
Sun..N winds 5 to 15 kt. Waves nw 10 ft at 14 seconds.
Sun night..N winds 5 to 10 kt. Waves nw 10 ft at 13 seconds.
Mon..SE winds 5 to 10 kt. Waves nw 8 ft at 15 seconds.
Tue..SE winds 10 to 15 kt. Waves se 3 ft at 7 seconds...and W 8 ft at 19 seconds.
Wed..SE winds 5 to 15 kt. Waves W 13 ft at 16 seconds.
PZZ400 231 Pm Pst Fri Dec 13 2019
Synopsis for northern california waters..An approaching front will bring a brief increase in S to sw winds today. Winds will shift to northerly behind the front tonight, followed by generally light winds this weekend and early next week. A large, long period nw swell will impact the area today and tonight, then very slowly subside into next week.


7 Day Forecast for Marine Location Near Comptche, CA
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location: 39.25, -123.48     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 132325 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 325 PM PST Fri Dec 13 2019

SYNOPSIS. A front will generate another round of light to moderate rain through this evening, followed by showers and lower snow levels Saturday afternoon. Drier weather is expected for Sunday and Monday. More rain is possible mid to late next week.

DISCUSSION. Short Term. (through Sunday night) . A cold front approaching continues to bring rain to much of the area this afternoon. This is expected to taper off late this afternoon and evening as the front pushes through. Cold air will start to filter in with this front, but most of the rain is expected to fall in the warm air with snow levels over 6,000 feet. Clearing skies are expected behind the front, although with the recent rain valley clouds are expected in the interior. Mainly dry weather is expected Saturday morning before the upper level trough moves in by mid to late afternoon bringing showers to the area. This is a colder airmass and snow levels will be around 3,000 feet. Accumulating is only expected above 3,500 feet in Humboldt and Del Norte counties. At this point it doens't look like this will cause major impacts so am not planning to issue a winter weather advisory. This colder air aloft will also bring the potential for small hail and thunder. Currently expect this to remain mainly over the northern waters but it is hard to rule out a weak thunderstorm moving onshore late Saturday afternoon or evening. These showers will slowly diminish late Saturday night and early Sunday morning.

Sunday late afternoon clouds may return and some light rain is possible in the north Sunday night. As the high pressure builds into the area some overrunning may bring some clouds and occasional light rain Sunday night into early Monday morning. Confidence is still low on this, but the models are starting to come into better better agreement on this. Any areas that do remain clear are expected to see valley fog. MKK

long Term. (Monday through Friday). The operational models have changed their tune once again with the 12Z runs and now bring show significant rain as early as Thursday. A full week of dry weather will most likely not happen, however it does look like the first part of next week will have below normal chances for precip as the next front in the queue splits and stalls offshore. The GFS still has some shower activity arriving around mid week. Confidence is growing that we will see significant precip late in the week and into the weekend. MKK

AVIATION. Widespread rain continues across northwest CA, producing variations in ceilings and visibility which have lead to numerous fluctuations between categories at area terminals this afternoon. Terminals are expected to generally reside in the MVFR/IFR range through late afternoon, with some periods of LIFR or VFR also possible as precipitation intensity varies. Rain will eventually taper off to showers through the evening before mostly coming to an end after 09z. Expecting airfields to generally settle into IFR cigs overnight into Saturday morning as precipitation comes to an end, although abundant low level moisture will also keep the threat of low stratus and fog with LIFR conditions in the range of possibilities. /CB

MARINE. As the approaching boundary and cold front near, long period westerly swells and southerly wind waves will continue until Saturday morning. Westerly swells of 16 feet at 16 to 17 seconds will diminish to 10 to 12 foot wave heights with periods around 15 seconds. New long period swells are developing and may arrive Wednesday and early Thursday. Moderate winds will switch from Southerly to Northerly tonight as the front moves through. Small Craft advisories in effect through late Sunday. /EYS

EKA WATCHES/WARNINGS/ADVISORIES. None.

NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory until 9 PM PST Sunday for PZZ450-455-470- 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
46014 - PT ARENA - 19NM North of Point Arena, CA 26 mi29 min WSW 7.8 G 9.7 56°F 55°F1018.6 hPa
ANVC1 - 9416841 - Arena Cove, CA 26 mi55 min S 1 G 2.9 55°F 55°F1019.2 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA17 mi1.9 hrsSSE 62.50 miLight Rain Fog/Mist53°F51°F93%1018.1 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3S3S5SE7S8S5SE63
1 day agoSE6SE3S5SE5SE5S9CalmS3CalmS4CalmCalmCalmCalmCalmCalmSW3CalmCalmCalmCalmCalmCalmW3
2 days agoS8S9E3CalmS6S4E3CalmCalmCalmCalmCalmCalmCalmS3SE3CalmE3CalmCalmCalmCalmS5S6

Tide / Current Tables for Albion, California
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Albion
Click for Map
Fri -- 12:29 AM PST     4.65 feet High Tide
Fri -- 05:01 AM PST     2.95 feet Low Tide
Fri -- 07:25 AM PST     Sunrise
Fri -- 08:50 AM PST     Moonset
Fri -- 10:55 AM PST     6.31 feet High Tide
Fri -- 04:52 PM PST     Sunset
Fri -- 05:59 PM PST     -1.08 feet Low Tide
Fri -- 06:31 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.64.64.23.63.133.23.84.65.46.16.3653.51.80.2-0.8-1.1-0.70.11.22.33.4

Tide / Current Tables for Point Cabrillo, California Current
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Point Cabrillo
Click for Map
Fri -- 12:57 AM PST     -0.00 knots Slack
Fri -- 03:03 AM PST     -0.67 knots Max Ebb
Fri -- 06:02 AM PST     0.00 knots Slack
Fri -- 07:26 AM PST     Sunrise
Fri -- 08:51 AM PST     Moonset
Fri -- 08:59 AM PST     0.75 knots Max Flood
Fri -- 11:38 AM PST     -0.00 knots Slack
Fri -- 03:12 PM PST     -1.54 knots Max Ebb
Fri -- 04:52 PM PST     Sunset
Fri -- 06:31 PM PST     Moonrise
Fri -- 07:06 PM PST     0.00 knots Slack
Fri -- 10:10 PM PST     1.14 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.5-0-0.5-0.7-0.6-0.3-00.30.60.70.60.3-0.2-0.7-1.3-1.5-1.4-1.1-0.6-0.10.50.91.11.1

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 (20,4,5,8)
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Ground Weather Radar Station Beal AFB, CA
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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.