Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Scotia, 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 2:03 PM PDT (21:03 UTC) Moonrise 4:17AMMoonset 6:36PM Illumination 2% 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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This is a Weather Statement Zone, please check the Date to see if it has expired
PZZ410 750 am pdt Thu aug 10 2017 a marine weather statement has been issued for the following areas... Waters from pt. St. George to cape mendocino ca out 60 nm... Humboldt bay bar... At 749 am pdt...doppler radar indicated a strong Thunderstorm... Capable of producing winds to around 30 knots. This Thunderstorm was located 16 nm west of eureka...moving southeast at 10 knots. Precautionary/preparedness actions... Mariners can expect gusty winds to around 30 knots...locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. && lat...lon 4082 12415 4082 12417 4085 12417 4076 12423 4081 12417 4069 12425 4071 12427 4069 12428 4063 12429 4063 12432 4050 12439 4087 12483 4108 12440 4093 12414 4085 12416 4087 12415 4086 12412
PZZ400 851 Am Pdt Sun Aug 20 2017
Synopsis for northern california waters..Northerly gales will continue across the outer waters through tonight. Gale force gusts will be possible nearshore, primarily near point saint george and cape mendocino. Seas will remain large and steep through early this week. Marine conditions are expected to slightly improve by the middle of the week before deteriorating yet again late in the week.

7 Day Forecast for Marine Location Near Scotia, CA
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location: 40.25, -124.37     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 201136
afdeka
area forecast discussion
national weather service eureka ca
436 am pdt Sun aug 20 2017

Synopsis Northeasterly winds will continue to transport smoke
across the redwood coast through early next week. Thunderstorms
will be possible over portions of trinity and northeastern
mendocino counties during the afternoon and evening hours of
Monday, Tuesday, and Wednesday.

Discussion High pressure off the coast and low pressure over
southern ca continues to bring a strong pressure gradient over the
northern portion of the area. North to northeast winds of 10 to 20
mph with gusts to 35 mph continue this morning. This offshore flow
is keeping most of the area clear of clouds and fog. There is
still fairly widespread smoke, especially in the northern portion
of the area. As the low starts to move north towards the area the
pressure gradient is weakening along the mendocino coast. This is
allowing a southerly surge of winds and stratus to start pushing
northwards.

Tonight offshore flow weakens considerably. Models are showing
that this will allow the stratus to spread northward. There is
still some weak offshore flow at 925 mb limit the stratus slightly
in humboldt and del norte counties. This is expected to start
burning off by mid morning, but will likely persist at the
immediate coast through late morning. In mendocino county the
southerly winds at the surface will likely push the stratus up
into the coastal areas from point arena to CAPE mendocino. This
may be slow to burn off as well.

Monday afternoon there is the potential for some thunderstorms
over the interior. Current models show the best potential to be
over the yolla bolla's. A storm or two could form in this area,
but it is not expected to be very widespread. Monday night stratus
will likely be more widespread at the coast and the marine layer
will deepen.

Tuesday afternoon looks to have the best chance for
thunderstorms. The upper level low continues to push north in this
pattern putting us in southeast flow. There is decent instability
and mid level lapse rates are around 7c km. Storm motion will be
weak, around 5 to 10 kt. This should help limit the potential for
lightning fires, but they may hold over until the warm weather
later in the week. Tuesday night the marine layer is expected to
be deep once again. Wednesday there is another chance for
thunderstorms. It certainly does not look as favorable as on
Tuesday. Another upper level trough starts to approach the area
bringing us southwest flow. This is much drier and mid level lapse
rates are poor as well. Left thunderstorms in the forecast, but if
models continue to show conditions this stable they may need to be
removed.

Thursday the upper level trough moves past the area. This will
likely be the coolest day with temperatures in the 80s to low 90s
in the inland areas. Friday into the weekend high pressure builds
back in the area bringing above normal temperatures again. This
also brings some more offshore flow which should limit the coastal
clouds. Additional smoke is possible, but this is difficult to
predict due to uncertainty on the size of the fires. Mkk

Aviation Due to fire in SW oregon near brookings and low level
northeasterly winds, there were smoke in the area including crescent
city and arcata. With the steep seas, there were also sea sprays in
the area. Do expect a combination of sea sprays and smoke will
reduce visibilities in crescent city and arcata airports today.

Think that smoke will be more dominant, so put that as the weather
group. Do expect conditions to lower to MVFR at times, otherwise it
should remain mostlyVFR for kcec and kacv. Do expect the gusty
north winds in crescent city to continue.

Meanwhile, marine stratus is trying to sneak into ukiah from the
south early this morning. If it does so, do expect the conditions to
lower to MVFR or ifr. If there is any marine stratus, it should
quickly burn off this morning, giving way toVFR conditions for the
rest of the day for ukiah.

Marine Steep seas and gale conditions will continue through
tonight. Overnight last night, buoys in NW california reported gale
force wind gusts with steep seas up to 16 to 18 feet. The active
marine weather is caused by a tight pressure gradient off nw
california coast, as a strong high pressure pinches against the west
coast while thermal low persists over central california. Do expect
improving conditions by Monday. Before then, we have gale warning
for the outside waters, small craft advisory for the inside waters,
and hazardous seas warning for the northern inside waters through
tonight.

Changes to the previous forecast package were minor. Utilized gfs
and NAM as the models of choice.

Fire weather Northeasterly winds gusting from 20-30 mph are
occurring this morning for elevations above 1500 feet in del
norte county. These winds combined with poor overnight rh recovery
of 30 to 45 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 through 8am Sunday for elevations above 1500 feet.

Surrounding the red flag warning, slightly weaker winds will limit
the severity of the
there is a chance of thunderstorms during the afternoon and
evening hours of Monday, Tuesday, and Wednesday across trinity and
northeastern mendocino counties. Current models show the best
chance for storms on Tuesday. These storms are expected to move
very slowly, which will favor wetting rainfall collocated with
lightning. Late in the week warm and dry conditions are expected
to return which will allow any holdover fires to continue to burn
and strengthen. Mkk

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

Northwest california coastal waters...

small craft advisory until 3 am pdt Monday for pzz450-455.

Hazardous seas warning until 9 am pdt this morning 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) 19 mi42 min 53°F12 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 34 mi74 min NW 7.8 G 9.7 55°F 52°F10 ft1013.3 hPa (+0.6)51°F
HBYC1 - 9418767 - North Spit, CA 37 mi88 min SSW 12 G 14 54°F 53°F1013.6 hPa
46244 - Humboldt Bay, North Spit, CA 45 mi43 min 55°F11 ft

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fortuna Rohnerville Airport, CA24 mi69 minN 128.00 miFair63°F53°F73%1013.5 hPa

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2 days agoNW12NW12NW9NW10NW9NW10NW6NW5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW5NW6NW10

Tide / Current Tables for Cape Mendocino, California
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Cape Mendocino
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Sun -- 05:02 AM PDT     -0.74 feet Low Tide
Sun -- 05:17 AM PDT     Moonrise
Sun -- 06:33 AM PDT     Sunrise
Sun -- 11:36 AM PDT     5.30 feet High Tide
Sun -- 04:59 PM PDT     2.06 feet Low Tide
Sun -- 07:36 PM PDT     Moonset
Sun -- 08:07 PM PDT     Sunset
Sun -- 10:45 PM PDT     6.68 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.23.720.6-0.4-0.7-0.40.51.73.14.35.25.34.83.932.32.12.43.34.55.66.56.7

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 (17,4,5,8)
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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.