Tuesday, December18, 2018 L-36.com


Marine Weather and Tides
Anchor Bay, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:25AMSunset 4:53PM Tuesday December 18, 2018 6:59 PM PST (02:59 UTC) Moonrise 2:21PMMoonset 2:49AM Illumination 88% Phase: Waxing Gibbous; Moon at 11 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- 235 Pm Pst Tue Dec 18 2018
.small craft advisory in effect through Thursday afternoon...
Tonight..S winds 5 to 10 kt...becoming east after midnight. Wind waves 2 ft or less. W swell 11 to 14 ft at 14 seconds. SWell sw 2 to 3 ft. A chance of rain this evening.
Wed..SW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 11 to 14 ft at 15 seconds and W 2 to 5 ft at 23 seconds.
Wed night..NE winds 5 to 10 kt. Wind waves 2 ft or less. W swell 13 to 15 ft at 19 seconds.
Thu..SE winds 5 to 15 kt. Wind waves 2 ft or less. W swell 10 to 12 ft at 17 seconds. A slight chance of rain.
Thu night..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 10 to 12 ft at 15 seconds. A chance of rain.
Fri..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 8 to 12 ft.
Fri night..NW winds 10 to 20 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 6 to 9 ft.
Sat..NW winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 5 to 10 ft. A chance of rain.
Sun..W winds up to 10 kt. Wind waves 2 ft or less. W swell 11 to 14 ft. A chance of rain.
PZZ500 235 Pm Pst Tue Dec 18 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Locally gusty northwest winds will continue along the big sur coast through this evening. A weak frontal boundary stalled over the region will result in light and variable winds across the northern waters and light northerly winds over the southern waters through Wednesday. Another large long-period swell will build Wednesday before subsiding Thursday. Hazardous sea conditions will also continue through Thursday.


7 Day Forecast for Marine Location Near Anchor Bay, CA
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location: 38.82, -123.68     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 182240
afdeka
area forecast discussion
national weather service eureka ca
240 pm pst Tue dec 18 2018

Synopsis Rain will taper off to showers this evening as a cold
front exits the area. A brief break in the weather will occur on
Wednesday followed by yet another weather system arriving on
Thursday.

Discussion A weak cold front is moving eastward across the
area this afternoon, bringing light to moderate rain to much of
northwest california. The highest amounts have generally been
found over the higher terrain of del norte and northern humboldt
into parts of trinity county, with lighter amounts over mendocino
county. The front will clear the area later this evening, leaving
scattered to widespread showers in its wake. These showers will
gradually taper off overnight and come to an end by Wednesday
morning. A more benign weather regime is on tap for Wednesday as
an upper level ridge builds into the region from the south,
bringing warmer and drier but still probably mostly cloudy
conditions to the area through Wednesday night. The break from the
more active weather will be brief as another front arrives on
Thursday with another shot of rain and gusty southerly winds.

There is still some model disagreement on the exact timing, but it
appears rain will begin along the north coast by early Thursday
afternoon at the latest. Rain amounts look to tempered a bit by
the progressive nature of this system, with amounts once again
higher to the north and trending lower to the south over mendocino
county. At this time it looks like most areas will see between
0.5 and 1.00 inch of precipitation, with locally higher amounts
over del norte county. Another wind advisory may eventually
become necessary for portions of del norte, but that determination
will be made as we get closer to the event.

This next system will quickly depart to the east Thursday night,
yielding another period of quieter weather Friday into Saturday as
zonal flow is once again established across northern california.

Some cloud cover is expected to linger across the region given
the broad onshore flow regime, but at least some clearing and
sunshine is possible by Friday, particularly across interior areas
where colder overnight lows will be possible as we approach the
weekend.

The next system will arrive over the area Sunday or Monday as a
deep trough digs over the western u.S. This has the potential to
bring much colder air to the region, resulting in increased
thunderstorm and small hail potential and much lower snow levels
than in recent days and weeks. Obviously there is still much to
be determined with respect to a system this far out in the
forecast, however this will bear close monitoring in the coming
days. Cb

Aviation A bout of rain associated with yet another frontal
system moved into northwest california this morning through
afternoon. As the front continued to approach, pre-frontal
conditions at all terminals deteriorated from mostly MVFR to ifr.

Steady rain amounts from mid-morning rendered over 1 2 inch at
cec (a couple mod-heavy reports) and about 1 3 of an inch at acv
by noonday. Rain will taper at the coast by late afternoon as the
front moves ashore and inland. Moderate to strong southerly winds
were present at the coastal terminals. Low level "speed" wind
shear (possible +60 at cec) and mostly "directional" shear were
also concerning. By 1:30 pm, winds had began to decrease, shifting
ssw as front neared the coast. In general, post frontal improving
conditions expected this evening although some low cloudiness and
reduced CIGS may continue into Wednesday morning. Ta

Marine Southerly gales have begun to slowly subside early this
afternoon as a cold front moves onshore. This trend will continue
through the night, allowing the steeper, locally generated wind
waves to subside. However, the persistent westerly swell will
maintain elevated seas despite the decrease in wind speeds.

Significant wave heights are expected to range from around 13 to
17 feet between this afternoon and Wednesday night, likely on the
higher end of that range Wednesday afternoon and evening as a
reinforcing westerly swell surge causes wave heights to increase.

By early Thursday, another approaching cold front will bring another
round of strong southerly winds that will continue through sometime
Thursday afternoon. A gale watch has been issued for the waters
north of CAPE mendocino and 10 nm or farther offshore Thursday as
a result. These increasing winds will once again generate steep
seas in addition to the already large west swell present in the
waters.

Winds will quickly shift to the north late Thursday and subside,
allowing steeper seas to settle. Meanwhile, the large westerly swell
will decay as well, and may allow wave heights to finally drop below
10 feet by Saturday. Late Saturday through the remainder of the
weekend, a series of storm systems and another building west swell
will bring a return of hazardous ocean conditions. Brc

Beach hazards Breaking wave heights have subsided just enough to
allow the high surf advisory to expire. However, elevated breaking
wave heights of 13 to 17 feet will continue to impact area beaches
tonight and tomorrow morning, and even waves of this height may
result in locally hazardous conditions along beaches and
especially rocks and jetties. In addition, a resurging west swell
will cause breaking waves to increase to around 18 to 22 feet by
Wednesday afternoon, and may require the issuance of yet another
high surf advisory in future forecasts. Brc

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory until 9
pm pst Friday for pzz450-455-475.

Gale watch from late Wednesday night through Thursday afternoon
for pzz470.

Small craft advisory until 3 am pst Thursday for pzz470.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANVC1 - 9416841 - Arena Cove, CA 7 mi60 min S 2.9 G 5.1 58°F 57°F1025.3 hPa (+0.0)
46014 - PT ARENA - 19NM North of Point Arena, CA 32 mi50 min SSW 7.8 G 12 58°F 57°F1024.5 hPa58°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 45 mi50 min SSW 9.7 G 9.7 58°F1025.9 hPa

Wind History for Arena Cove, CA
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--

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA34 mi2.1 hrsS 73.00 miLight Rain Fog/Mist53°F51°F93%1024.8 hPa

Wind History from UKI (wind in knots)
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Last 24hrCalmCalmN3W3SE3CalmSE3CalmCalmCalmCalmS3CalmCalmCalmCalmCalmCalmS8S8S7S8S7S7
1 day agoW3W3CalmCalmCalmCalmW3CalmCalmCalmCalmCalmCalmCalmE4CalmCalmCalmCalmCalmCalmW3CalmCalm
2 days agoSE9
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4NW4N6N6

Tide / Current Tables for Arena Cove, California
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Arena Cove
Click for Map
Tue -- 12:33 AM PST     2.04 feet Low Tide
Tue -- 02:49 AM PST     Moonset
Tue -- 07:10 AM PST     6.01 feet High Tide
Tue -- 07:28 AM PST     Sunrise
Tue -- 02:10 PM PST     0.94 feet Low Tide
Tue -- 02:21 PM PST     Moonrise
Tue -- 04:54 PM PST     Sunset
Tue -- 08:17 PM PST     4.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.12.12.43.24.155.765.85.24.23.121.30.91.11.62.43.23.94.24.13.73.1

Tide / Current Tables for Point Arena, California Current
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Point Arena
Click for Map
Tue -- 01:56 AM PST     0.00 knots Slack
Tue -- 02:50 AM PST     Moonset
Tue -- 04:59 AM PST     0.84 knots Max Flood
Tue -- 07:28 AM PST     Sunrise
Tue -- 08:03 AM PST     -0.00 knots Slack
Tue -- 11:04 AM PST     -1.18 knots Max Ebb
Tue -- 02:21 PM PST     Moonrise
Tue -- 03:06 PM PST     0.00 knots Slack
Tue -- 04:54 PM PST     Sunset
Tue -- 05:55 PM PST     0.84 knots Max Flood
Tue -- 09:04 PM PST     -0.00 knots Slack
Tue -- 11:24 PM PST     -0.75 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.5-0.300.40.70.80.70.50-0.5-1-1.2-1.1-0.8-0.5-0.10.40.70.80.70.50-0.4-0.7

Weather Map and Satellite Images
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GOES 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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Wind Forecast for Eureka, CA (21,6,7,8)
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Ground Weather Radar Station Sacramento, 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.