Thursday, March21, 2019 L-36.com


Marine Weather and Tides
Shelter Cove, 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 7:16AMSunset 7:30PM Thursday March 21, 2019 4:40 AM PDT (11:40 UTC) Moonrise 7:33PMMoonset 7:03AM 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- 246 Am Pdt Thu Mar 21 2019
.small craft advisory in effect from late tonight through Friday afternoon...
Today..S winds 5 to 10 kt. Waves W 7 ft at 15 seconds.
Tonight..SE winds 5 to 15 kt. Waves S 2 ft at 4 seconds...and W 8 ft at 14 seconds. Chance of rain.
Fri..SE winds 15 to 25 kt. Waves S 8 ft at 8 seconds...and W 8 ft at 15 seconds. Rain.
Fri night..W winds 5 kt. Waves S 4 ft at 6 seconds...and W 12 ft at 17 seconds.
Sat..NW winds 5 to 10 kt. Waves W 13 ft at 16 seconds.
Sun..SE winds 10 to 20 kt. Waves S 5 ft at 7 seconds...and W 9 ft at 12 seconds.
Mon..S winds 10 to 15 kt. Waves S 5 ft at 5 seconds...and W 9 ft at 13 seconds.
PZZ400 246 Am Pdt Thu Mar 21 2019
Synopsis for northern california waters..Relatively light southerly winds will last through this evening. Another front will approach the coast Friday morning bringing strengthening southerlies and short period southerly seas. These conditions will be accompanied by a building w-nw swell on Friday as well. Winds will ease for the bulk of the weekend while seas remain elevated.


7 Day Forecast for Marine Location Near Shelter Cove, CA
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location: 40.03, -124.07     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 202224
afdeka
area forecast discussion
national weather service eureka ca
324 pm pdt Wed mar 20 2019

Synopsis Periods of light rain will continue through this
evening, followed by mostly dry conditions tomorrow. Additional
rounds of rain can be expected Friday and again Monday through
potentially the end of the week.

Discussion An area of low pressure off the coast is continuing
to bring rain to the area this afternoon. Showers are generally
fairly light so far. Later this afternoon and evening another
shortwave moves through. This could bring some heavier to the
area. Snow levels remain over 5,000 feet this afternoon, but will
start to drop this evening to around 4,000 feet. The ensembles
show the potential for some light showers continuing late tonight
Thursday a transient area of upper level high pressure quickly
moves through the area. This should keep the things fairly dry,
but there is a chance for some showers mainly in the interior
Thursday afternoon. The combination of a fairly warm airmass and
all the moisture around make it unlikely that we will see frost
Thursday morning.

Thursday night mid and high clouds ahead of a cold front start to
move across NW california. Rain is expected to start Friday
morning as the front moves onshore. This should bring a fairly
quick shot of rain as the front moves inland by late in afternoon.

Gusty winds are expected as this front moves through the area, the
gfs and NAM are showing winds of 40 to 50 kt at 925 mb over the
waters. This should translate to gusts of 40 mph over the coastal
ridges. Higher gusts are possible, but this will need to be
watched as it gets closer. Friday night showers are expected as
the upper level trough moves overhead. A fairly cold airmass is
expected early Saturday morning and there is the potential for
some small hail with these showers. Confidence is low on how long
these showers will continue on Saturday. Some of the operational
models quickly dry things out, but the ensembles generally keep
pops fairly high in the morning.

Saturday afternoon the showers will taper off and another brief
period of high pressure is expected to build into the area. For
now it looks like there will be the potential for fairly
widespread frost over the area. This will depend on how much fog
and low clouds form, but quite a few inland areas could see frost.

Sunday night into Monday the system starts to move into the area.

Confidence still low on the exact timing of when this system will
move onshore, but high that will see a decent shot of rain on
Monday. Tuesday and Wednesday the pattern is expected to remain
wet. At this point the rain doesn't look like it will have large
impacts. Mkk

Aviation Showery rain continues to move northward over
northwestern california this afternoon as a system tracks from pt
arena toward the oregon coast. Conditions may occasionally drop to
ifr within heavier showers, however these should be relatively short-
lived and dissipate by early this evening. Relatively weak low-level
wind shear is also possible ahead of approaching bands of heavier
showers. After the showers finish, depending on the density of high
clouds tonight, we may see inland valley fog develop while easterly
winds at the coast should suppress fog development at kacv and kcec.

Tdj

Marine Westerly winds in the outer waters should shift to
southerly as a surface low pressure center tracks northward up the
coast. Along with this direction shift, winds across all waters
should weaken to below 15 kts by this evening. Southerlies are
expected to accelerate again tomorrow night with gusts to near gale
force, strongest offshore of pt. St. George. After these southerlies
subside winds are expected to stay relatively light through the
early part of the weekend.

The wnw swell currently dominating the coastal waters will continue
to weaken through this afternoon and into tomorrow. Strong
southerlies on Friday morning will generate short period southerly
seas to 10 ft across the northern outer waters on Friday before
subsiding into the weekend. Simultaneously, another solid wnw swell
will fill in on Friday and peak Saturday morning at around 14 ft at
16 seconds.

Tdj

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters...

gale watch from late Thursday night through Friday afternoon for
pzz470.

Small craft advisory until 4 pm pdt this afternoon for pzz455.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46213 - Cape Mendocino, CA (094) 40 mi40 min 52°F9 ft
HBYC1 - 9418767 - North Spit, CA 52 mi64 min ESE 7 G 8.9 42°F 52°F1019.9 hPa

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fortuna Rohnerville Airport, CA36 mi65 minESE 64.00 miOvercast39°F39°F100%1019.6 hPa

Wind History from FOT (wind in knots)
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1 day agoSE6SE5CalmCalmCalmCalmNW3N3NW3NW7NW12NW8W9CalmCalmCalmS4SE3SE5S3CalmSE6SE6SE6
2 days agoSE9SE9SE9SE9S5S3S3NW6NW9NW11NW11W12NW11NW4NW6CalmCalmCalmCalmSE4SE5S5SE5SE8

Tide / Current Tables for Shelter Cove, California
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Shelter Cove
Click for Map
Thu -- 12:03 AM PDT     6.12 feet High Tide
Thu -- 06:01 AM PDT     0.67 feet Low Tide
Thu -- 07:18 AM PDT     Sunrise
Thu -- 08:02 AM PDT     Moonset
Thu -- 12:01 PM PDT     6.31 feet High Tide
Thu -- 06:21 PM PDT     0.03 feet Low Tide
Thu -- 07:29 PM PDT     Sunset
Thu -- 08:33 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.15.84.83.4210.71.12.13.44.85.96.364.93.51.90.70.10.212.33.85.2

Tide / Current Tables for Punta Gorda, California Current
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Punta Gorda
Click for Map
Thu -- 12:42 AM PDT     -0.00 knots Slack
Thu -- 03:25 AM PDT     -1.33 knots Max Ebb
Thu -- 06:53 AM PDT     0.00 knots Slack
Thu -- 07:19 AM PDT     Sunrise
Thu -- 08:03 AM PDT     Moonset
Thu -- 09:49 AM PDT     1.28 knots Max Flood
Thu -- 12:53 PM PDT     -0.00 knots Slack
Thu -- 03:46 PM PDT     -1.46 knots Max Ebb
Thu -- 07:21 PM PDT     0.00 knots Slack
Thu -- 07:30 PM PDT     Sunset
Thu -- 08:34 PM PDT     Moonrise
Thu -- 10:15 PM PDT     1.26 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.5-0.2-0.9-1.3-1.3-1-0.50.10.71.21.31.10.6-0.1-0.8-1.3-1.5-1.2-0.8-0.20.411.31.2

Weather Map and Satellite Images
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wmap_P
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 (7,2,3,4)
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Ground Weather Radar Station Eureka, 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.