Tuesday, March28, 2017 L-36.com


Marine Weather and Tides
Shelter Cove, CA

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:02AMSunset 7:39PM Tuesday March 28, 2017 4:55 AM PDT (11:55 UTC) Moonrise 6:43AMMoonset 7:35PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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- 234 Am Pdt Tue Mar 28 2017
.small craft advisory in effect through Wednesday afternoon...
Today..NW winds 10 to 15 kt. Waves W 14 ft at 15 seconds.
Tonight..NW winds 5 to 15 kt. Waves W 10 ft at 15 seconds.
Wed..NW winds 5 to 10 kt. Waves nw 10 ft at 16 seconds. Chance of rain.
Wed night..NW winds 5 to 10 kt. Waves nw 9 ft at 15 seconds.
Thu..N winds 15 to 20 kt. Waves nw 6 ft at 9 seconds...and nw 10 ft at 14 seconds.
Fri..N winds 10 to 20 kt. Waves N 5 ft at 9 seconds...and nw 9 ft at 14 seconds.
Sat..N winds 10 to 20 kt. Waves nw 11 ft at 15 seconds.
PZZ400 234 Am Pdt Tue Mar 28 2017
Synopsis for northern california waters..Light to moderate northerly winds will prevail across the waters through Tuesday. An elevated westerly swell will propagate across the waters for the next few days. A weak cold front will bring southerly winds to the waters on Wednesday and Wednesday night. Northerly winds will return Thursday and Friday.

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 280022
afdeka
area forecast discussion
national weather service eureka ca
522 pm pdt Mon mar 27 2017

Synopsis High pressure will build briefly this afternoon
bringing drier weather conditions through Tuesday. Another
rain producing system will arrive late Wednesday followed by
a dry and warmer period toward the weekend.

Update Did a quick update to the forecast to add a frost
advisory to northeast mendocino county. Clear skies and calm winds
will likely allow frost to form tonight. Mkk

Prev discussion /issued 353 pm pdt Mon mar 27 2017/
synopsis... High pressure will build briefly this afternoon
bringing drier weather conditions through Tuesday. Another
rain producing system will arrive late Wednesday followed by
a dry and warmer period toward the weekend.

Discussion... A drier northwesterly has set up promoting sunshine
and much drier air. Responsible for this is some upper level
ridging and stable air which will build toward the coast
throughout the remainder of this afternoon bringing a welcome end
to the shower activity. Cooler air will settle over the area
tonight and a frost advisory has been issued for the interior
valleys of mendocino county. Stronger subsidence and light
offshore winds should provide steady drying through early Tuesday.

A frost advisory will need to be considered with temperatures
expected to fall to near 34f- 36f across those valleys and
possibly lower locally. Except for morning frost, Tuesday is
shaping up to be a fine day after the morning low clouds and fog
burn off in the interior valleys. Dry conditions should last
through the morning hours on Wednesday as surface ridging remains
over the area. Another front will approach the west coast wed
afternoon. The models have slowed down the warm front slightly,
but still have the cold front moving through Wednesday night when
most of the rain is expected. Ridging aloft and robust northerly
flow at the surface will build after the passage of a mid level
shortwave trough on thu. With brisk northerly winds offshore,
coastal areas will probably get fairly windy each afternoon,
especially on Friday. Dry weather will likely hold into the
weekend, however the GFS and ECMWF continue to forecast the ridge
to flatten out toward the end of the weekend in response to
another shortwave trough. Some rain or showers will certainly be
possible Sun or mon. For now will keep the forecast dry with only
a slight chance of rain. We may need to beef up the rain chances
if the models continue on their present course. Jt/db
aviation... Showers were diminishing through the day. By the
afternoon, we are left with shallow convective clouds over the hills
and mountains, giving usVFR conditions. Do expect these convective
clouds to dissipate after sunset as we lose daytime heating. Do
expect northerly low level winds to develop over crescent city and
humboldt counties and this will bring in drier air into the area.

The dry air advection will limit the fog and low cloud potential
overnight at those airports. For ukiah airport, there won't be as
much dry air advection. Thus, put in some low clouds and reduced
visibilities for potential fog and low clouds formation. Tomorrow
should be a mostly sunny day across NW california. /rcl
marine... Westerly swells impacting NW california through middle of
the week. Northerly winds will prevail across NW california waters.

Winds will be increasing to advisory level starting on Thursday.

Through this afternoon, area buoys have been reporting northwest
wind around 10 to 15 kt. Do expect the northwest wind to continue
through tomorrow into Wednesday as a high pressure builds over the
eastern pacific ocean and a thermal trough sets up shop over
central valley. On Thursday, the high pressure will push east and
tightens the pressure gradient off the coast of NW california.

The northerly winds will pick up to small craft level starting on
Thursday. Looks like the strong northerlies will persist through
the start of the weekend.

Seas-wise, it is pretty excited for the next few days. We have a
decaying westerly mid-period wave group, while a notable westerly
swell move into the waters. This westerly swell will start off at
around 20 seconds. The period of this swell will shorten with time,
down to 12 to 14 seconds by Tuesday and Wednesday. With wave height
of around 10 feet, this warrant a small craft advisory due to seas.

Do have the small craft in effect through Wednesday.

Minimal changes to the previous forecast package were made, as the
forecast is still on track from the previous version.

Eka watches/warnings/advisories
Ca... Frost advisory from 1 am to 9 am pdt Tuesday for caz110-111-113.

Northwest california coastal waters... Small craft advisory until 3 pm pdt Wednesday for pzz450-455-470-
475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46213 - Cape Mendocino, CA (094) 39 mi34 min 54°F12 ft
HBYC1 - 9418767 - North Spit, CA 52 mi80 min ESE 4.1 G 5.1 46°F 53°F1029.2 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 mi61 minSSE 410.00 miMostly Cloudy41°F39°F93%1029.5 hPa

Wind History from FOT (wind in knots)
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Last 24hrE3CalmSE4SE4CalmN6N5NW8NW9N9NW7
G14
NW11NW14NW12N10NW5W5CalmS4SE7CalmCalmS3Calm
1 day agoE10SE12SE15
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SE19SE16E10E10S3NW7W8NW5N3CalmSE4SE4SE4SE5SE3CalmE3
2 days agoSE3SE5SE3SE4CalmS4CalmNW6NW8N11N9NW10
G15
NW8NW8NW4W4CalmS3CalmSE5SE5SE5SE5E10

Tide / Current Tables for Shelter Cove, California
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Shelter Cove
Click for Map
Tue -- 06:03 AM PDT     0.48 feet Low Tide
Tue -- 07:06 AM PDT     Sunrise
Tue -- 07:43 AM PDT     Moonrise
Tue -- 12:11 PM PDT     5.85 feet High Tide
Tue -- 06:15 PM PDT     0.46 feet Low Tide
Tue -- 07:37 PM PDT     Sunset
Tue -- 08:35 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
65.64.63.21.90.90.50.81.734.35.45.85.64.83.52.110.50.71.52.84.25.5

Tide / Current Tables for Punta Gorda, California Current
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Punta Gorda
Click for Map
Tue -- 12:36 AM PDT     -0.00 knots Slack
Tue -- 03:26 AM PDT     -1.36 knots Max Ebb
Tue -- 06:54 AM PDT     0.00 knots Slack
Tue -- 07:07 AM PDT     Sunrise
Tue -- 07:44 AM PDT     Moonrise
Tue -- 09:51 AM PDT     1.21 knots Max Flood
Tue -- 12:59 PM PDT     -0.00 knots Slack
Tue -- 03:47 PM PDT     -1.33 knots Max Ebb
Tue -- 07:13 PM PDT     0.00 knots Slack
Tue -- 07:38 PM PDT     Sunset
Tue -- 08:36 PM PDT     Moonset
Tue -- 10:08 PM PDT     1.16 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.4-0.3-0.9-1.3-1.3-1-0.50.10.61.11.210.6-0-0.7-1.2-1.3-1.1-0.6-0.10.40.91.21

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Eureka, CA (7,2,3,4)
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Ground Weather Radar Station Eureka, 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.