Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Shelter Cove, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 6:31AMSunset 8:07PM Sunday August 20, 2017 12:57 AM PDT (07:57 UTC) Moonrise 4:16AMMoonset 6:34PM Illumination 4% Phase: Waning Crescent; Moon at 28 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- 907 Pm Pdt Sat Aug 19 2017
.small craft advisory in effect through late Sunday night...
Tonight..N winds 15 to 25 kt with occasional gusts to 35 kt. Waves N 8 ft at 10 seconds...and sw 2 ft at 15 seconds. Patchy fog.
Sun..S winds 5 to 15 kt with gusts to 30 kt. Waves N 7 ft at 10 seconds...and W 2 ft at 15 seconds. Patchy fog.
Sun night..W winds 5 to 10 kt. Waves N 6 ft at 8 seconds... And nw 2 ft at 12 seconds. Patchy fog.
Mon..SW winds 5 kt. Waves N 4 ft at 7 seconds...and nw 2 ft at 12 seconds.
Mon night..W winds 5 kt. Waves N 5 ft at 7 seconds.
Tue..NW winds 5 to 15 kt. Waves N 4 ft at 6 seconds...and nw 3 ft at 10 seconds.
Wed..NW winds 10 to 20 kt. Waves nw 6 ft at 7 seconds...and nw 2 ft at 12 seconds.
Thu..NW winds 15 to 25 kt. Waves nw 6 ft at 7 seconds...and nw 2 ft at 11 seconds.
PZZ400 907 Pm Pdt Sat Aug 19 2017
Synopsis for northern california waters..Northerly gales will continue across the outer waters through Sunday. Gale force gusts will be possible nearshore, primarily near point saint george and cape mendocino. Seas will be large and steep through the weekend. Marine conditions are expected to settle by the middle of the coming week.

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 192219
afdeka
area forecast discussion
national weather service eureka ca
319 pm pdt Sat aug 19 2017

Synopsis Northeasterly winds will continue to transport smoke
across the redwood coast through early next week. Otherwise, above
average temperatures will persist across interior northwest
california through the middle of next week. In addition,
thunderstorms will be possible over portions of trinity and
northeastern mendocino counties during the afternoon and evening
hours of Monday, Tuesday, and Wednesday.

Discussion A tight surface pressure gradient will locally be
generated over nwrn ca tonight as high pressure builds swd over
srn or ncntrl ca, and a trough of lower pressure sharpens along
the coast. This will yield winds gusting from 20-30 kt across
exposed ridges in del norte county, resulting in a critical fire
weather threat (refer to the fire weather discussion below).

Northeasterly winds will also aid in transporting thick (mainly
elevated) smoke from inland wildfires swd across the redwood coast
through at least early next week.

Meanwhile, an upper-level low is forecast to develop in the
vicinity of coastal southern ca. A cooler midlevel airmass will
gradually spread north-northwest from the low, and aid in
destabilizing the environment over trinity and northeastern
mendocino counties Monday through Wednesday. This will will lead
to conditions supportive of thunderstorm development, with the
greatest coverage expected Tuesday afternoon evening.

Model guidance shows drier conditions and moderating inland
temperatures developing by next weekend as a ridge builds in the
wake of a trough passing E across the pac nw.

Aviation Dry conditions will persist for the next day as
surface high pressure remains over the eastern pacific. The
primary meteorological impact today and Sunday will be gusty
northerly coastal winds, particularly at cec, where the pressure
gradient is tightest between the high over the eastern pacific and
low pressure over interior california. Some coastal stratus will
redevelop tonight with pockets of lifr ceilings and visibilities
south of klamath.

Otherwise, a large non-meteorological impact will be continued
smoke streaming across the region from nearby wildfires bringing
localized MVFR ceilings and reduced visibilities at times. Rpa

Marine A strong gale is developing over the outer waters this
afternoon and will persist through tonight. Very steep seas will
develop in response to the winds, peaking between 14 and 16 feet
in the outer waters. Some of these seas will move into the inner
waters north of CAPE mendocino requiring the issuance of a
hazardous seas warning for the northern inner waters zone. The
seas will gradually subside Sunday into Monday as the winds begin
to decrease and the tightest pressure gradient shifts farther
west north. Gale warnings in the outer waters will be able to
expire by Monday morning.

A short period of moderated winds and lower seas is in store
early to mid week as an upper low develops off the
central southern california coast. Some light southerlies will be
possible along the immediate coastline which is not currently
depicted in the forecast.

Stronger northerlies will likely return late in the week as an
upper level ridge re-develops over the west coast. Rpa

Fire weather Northeasterly winds gusting from 20-30 mph are
forecast to occur for elevations above 1500 feet in del norte
county through Sunday morning. These winds combined with poor
overnight rh recovery near 20 percent and sufficiently dry fuels
will yield a locally critical fire weather threat. A red flag
warning remains in effect for fire zone 203 (upper smith) in
interior del norte county from 5pm this afternoon to 8am Sunday
for elevations above 1500 feet. Surrounding the red flag warning,
slightly weaker winds will limit the severity of the fire weather
threat.

There is a chance of thunderstorms during the afternoon and
evening hours of Monday, Tuesday, and Wednesday across trinity and
northeastern mendocino counties. These storms are expected to
move very slowly, which will favor wetting rainfall collocated
with lightning.

Eka watches warnings advisories
Ca... Red flag warning until 8 am pdt Sunday for caz203.

Northwest california coastal waters... Small craft advisory until
3 am pdt Monday for pzz450-455.

Hazardous seas warning until 9 am pdt Sunday for pzz450.

Gale warning until 3 am pdt Monday for pzz470-475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46213 - Cape Mendocino, CA (094) 40 mi36 min 53°F17 ft
HBYC1 - 9418767 - North Spit, CA 52 mi82 min SSW 5.1 G 5.1 54°F 54°F1013 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 mi83 minSE 47.00 miMostly Cloudy50°F48°F94%1013.2 hPa

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Last 24hrCalmSE3CalmCalmCalmNW3CalmNW4W3CalmNW4NW10NW11W11W14
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1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW5NW6NW10NW12NW11NW12NW13NW11NW9NW6NW3CalmCalmCalm
2 days agoS4SE4SE5S5CalmCalmCalmCalmN4N5N10NW13NW9NW12NW12NW9NW10NW9NW10NW6NW5CalmCalmCalm

Tide / Current Tables for Shelter Cove, California
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Shelter Cove
Click for Map
Sun -- 04:51 AM PDT     -0.90 feet Low Tide
Sun -- 05:16 AM PDT     Moonrise
Sun -- 06:32 AM PDT     Sunrise
Sun -- 11:22 AM PDT     5.27 feet High Tide
Sun -- 04:35 PM PDT     2.01 feet Low Tide
Sun -- 07:34 PM PDT     Moonset
Sun -- 08:05 PM PDT     Sunset
Sun -- 10:40 PM PDT     7.08 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.43.720.4-0.6-0.9-0.40.72.13.64.75.25.24.53.62.72.12.12.63.64.96.16.97

Tide / Current Tables for Punta Gorda, California Current
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Punta Gorda
Click for Map
Sun -- 01:51 AM PDT     -1.57 knots Max Ebb
Sun -- 05:17 AM PDT     Moonrise
Sun -- 05:45 AM PDT     0.00 knots Slack
Sun -- 06:33 AM PDT     Sunrise
Sun -- 08:51 AM PDT     1.30 knots Max Flood
Sun -- 12:00 PM PDT     -0.00 knots Slack
Sun -- 02:29 PM PDT     -0.91 knots Max Ebb
Sun -- 05:45 PM PDT     0.00 knots Slack
Sun -- 07:36 PM PDT     Moonset
Sun -- 08:06 PM PDT     Sunset
Sun -- 08:38 PM PDT     1.06 knots Max Flood
Sun -- 11:30 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1-1.4-1.6-1.4-1.1-0.50.20.81.21.31.10.70-0.6-0.9-0.9-0.7-0.40.10.7110.80.3

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 (3,6,7,8)
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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.