Saturday, February17, 2018 L-36.com


Marine Weather and Tides
Myrtle, 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 7:04AMSunset 5:56PM Saturday February 17, 2018 7:10 PM PST (03:10 UTC) Moonrise 8:17AMMoonset 7:56PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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 754 Am Pdt Thu Sep 7 2017
.a strong Thunderstorm over the waters... The areas affected include... Coastal waters from pt. St. George to cape mendocino ca out to 50... At 751 am pdt...doppler radar indicated Thunderstorms... Capable of producing local winds to around 30 knots and small hail. These storms are moving to the northwest at 25 knots. These Thunderstorms will continue through at least mid morning. 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 4174 12417 4160 12410 4114 12416 4104 12412 4077 12423 4076 12423 4081 12418 4081 12417 4069 12422 4071 12426 4065 12431 4063 12428 4062 12426 4061 12433 4045 12441 4052 12578 4178 12499 4178 12426
PZZ400 301 Pm Pst Sat Feb 17 2018
Synopsis for northern california waters..Light to moderate northerly winds and steep seas will continue through today. Northerly winds will increase again on Sunday which will be accompanied with a large nw swell entering the waters as well.

7 Day Forecast for Marine Location Near Myrtle, CA
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location: 40.8, -124.14     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 172307
afdeka
area forecast discussion
national weather service eureka ca
307 pm pst Sat feb 17 2018

Synopsis An incoming storm system will bring rain and snow
showers to northwest california beginning late this afternoon
through early Monday morning. Snow levels will rapidly fall from
3000 feet early Sunday morning to near 1000 feet Sunday night.

Small hail is possible along the coast. A prolonged period of
cold temperatures will persist into early next week.

Discussion Light rain will continue to spread south across the
area this evening as a cold front moves through the area. Snow
levels tonight will be above 5,000 feet with this initial band of
precip. Rainfall totals tonight are expected to range from a
tenth to a quarter of an inch in humboldt and del norte county
with lower amounts farther south and east.

Early Sunday the upper level trough will start to spread south
bring showers to the area. Models have come into better agreement
on some very cold air moving over the area. Snow levels are
expected to fall to around 1,000 feet in the north to 2,000 feet
in the south by late Sunday afternoon. Sunday night into early
Monday morning showers will start to diminish, but snow levels
will continue to fall to around 500 to 1,000 feet across the area.

A few snowflakes are possible at the coast, but no accumulation
of snow is expected. Small hail or ice pellets is likely with the
convective activity along the coast Sunday afternoon and evening.

Instability is not too high, only around 200 j kg, and lapse rates
are modest, between 6.5c and 7c km. The very cold airmass still
makes it likely there will be some accumulating small hail on
area roadways in the heavier showers. Monday morning a few
lingering showers are expected with snow levels ranging from 500
to 1,000 feet. Lows Sunday night will be in the 20s inland with
temperatures around freezing at times on the coast. Temperatures
will remain chilly in the afternoon with highs remaining in the
40s in most areas.

Monday night into Tuesday is expected to be the coldest morning
with 850 mb temps over the area are still around -5 to -8 c. With
clear skies temperatures could easily drop into the teens and
widespread areas in the 20s are likely, even at the coast. Some
single digit temperatures possible in the cold spots of trinity
county that remain clear. The main question will be cloud cover.

The models have recently started showing a fairly small system
passing by to the west of the area Tuesday morning. The current
model timing shows the clouds increasing around sunrise with some
light showers at the coast in the afternoon. Confidence is low on
the strength and location of this system due to it's relatively
small scale. If this moves farther onshore it could keep
temperatures warmer overnight. There is also the potential for
freezing fog to develop overnight, but it is not expected to be
very widespread. If this system does move onshore some light
precip is possible during the day on Tuesday and snow levels will
likely be quite low with it.

Tuesday night models show this system moving out fairly quickly,
although some lingering clouds could have some impact on
temperatures. In general the airmass behind this system looks
warmer so Wednesday morning is not expected to be as cold.

Late in the week and into the weekend the ECMWF is showing
several more fairly cold weather systems bringing some additional
rain and snow to the area. The GFS is much drier with these
systems, although cold air will remain over the area. Trended the
forecast slightly toward the ECMWF as it seems to have been
handling the moisture in these systems out of the north somewhat
better. Mkk
while northwest winds will generally remain light to
moderate throughout the waters the remainder of the day, winds are
expected to steadily increase Sunday morning, eventually reaching
near 30 kt sustained with gusts to 40 kt across the outer waters.

Meanwhile, a large swell from the northwest will move through the
waters Sunday evening through Monday morning. The combination of
steep wind-driven seas and the arriving swell will result in very
large and hazardous seas, with combined wave heights reaching 20 to
25 feet throughout much of the waters. As a result, a gale warning
has been issued for the outer waters from late Sunday morning
through Monday afternoon, and a hazardous seas warning has been
issued for the nearshore waters of humboldt and del norte counties.

Winds will steadily decrease through the day Tuesday, allowing seas
to slowly subside.

Tuesday and Wednesday, north winds of 15 to 20 kt will maintain
somewhat elevated seas, likely with wave heights between 7 and 9
feet. However, north winds will increase again Thursday through the
end of the week, resulting in the buildup of steeper seas that will
last through at least the end of Friday. Brc

Aviation Ceilings along the coast are gradually lowering along
the coast as a cold front approaches. MVFR ceilings have already
developed at cec, and are expected to do so shortly at acv as well.

Showers are also expected to move into both terminals this afternoon
and evening, and these showers along with periods of MVFR ceilings
will continue to impact both coastal terminals through Sunday
afternoon and likely beyond. Episodes of small hail and perhaps even
a brief snow shower or two will be possible early tomorrow morning.

At uki,VFR conditions continue to hold, but broken MVFR ceilings
will be possible overnight tonight through the day tomorrow. Brc

Marine While northwest winds will generally remain light to
moderate throughout the waters the remainder of the day, winds are
expected to steadily increase Sunday morning, eventually reaching
near 30 kt sustained with gusts to 40 kt across the outer waters.

Meanwhile, a large swell from the northwest will move through the
waters Sunday evening through Monday morning. The combination of
steep wind-driven seas and the arriving swell will result in very
large and hazardous seas, with combined wave heights reaching 20 to
25 feet throughout much of the waters. As a result, a gale warning
has been issued for the outer waters from late Sunday morning
through Monday afternoon, and a hazardous seas warning has been
issued for the nearshore waters of humboldt and del norte counties.

Winds will steadily decrease through the day Tuesday, allowing seas
to slowly subside.

Tuesday and Wednesday, north winds of 15 to 20 kt will maintain
somewhat elevated seas, likely with wave heights between 7 and 9
feet. However, north winds will increase again Thursday through the
end of the week, resulting in the buildup of steeper seas that will
last through at least the end of Friday. Brc

Eka watches warnings advisories
Ca... Winter weather advisory from 4 am Sunday to 4 am pst Monday for
caz102-104>108.

Northwest california coastal waters...

small craft advisory from 9 pm this evening to 9 am pst Sunday
for pzz470-475.

Gale warning from 9 am Sunday to 3 pm pst Monday for pzz470-475.

Small craft advisory from 3 am Sunday to 3 pm pst Monday for
pzz455.

Small craft advisory from 3 am to 3 pm pst Sunday for pzz450.

Hazardous seas warning from 3 pm Sunday to 3 pm pst Monday for
pzz450.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HBYC1 - 9418767 - North Spit, CA 5 mi40 min WNW 12 G 14 49°F 50°F1020.6 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi40 min 51°F7 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 21 mi80 min WNW 9.7 G 14 51°F 51°F7 ft1020.2 hPa (-1.3)47°F
46213 - Cape Mendocino, CA (094) 47 mi48 min 51°F6 ft

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Arcata / Eureka, Arcata Airport, CA13 mi17 minWNW 71.50 miLight Rain Fog/Mist50°F48°F93%1020.7 hPa
Fortuna Rohnerville Airport, CA17 mi35 minNW 90.25 miOvercast48°F46°F94%1020.3 hPa

Wind History from ACV (wind in knots)
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Last 24hrN7N4CalmNE3NE4E3E3CalmE4E3E3E4E3CalmCalmS3SW3W7CalmW7CalmW3CalmNW7
1 day agoN6N5CalmE3E3E4E4E4E3CalmE4E3CalmCalmCalmW3NW13NW14N18
G23
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N14N14N12N12
2 days agoN8N7NE4N7NE3E3SE3E3NE3E3CalmE4E5CalmCalmCalmNW3NW12NW16NW14N13N14N9N10

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
Click for Map
Sat -- 01:34 AM PST     6.65 feet High Tide
Sat -- 06:47 AM PST     2.32 feet Low Tide
Sat -- 07:07 AM PST     Sunrise
Sat -- 08:16 AM PST     Moonrise
Sat -- 12:58 PM PST     7.45 feet High Tide
Sat -- 05:53 PM PST     Sunset
Sat -- 07:15 PM PST     0.04 feet Low Tide
Sat -- 07:56 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.86.56.65.94.73.52.62.32.83.95.16.37.17.575.842.20.80.10.31.22.64.1

Tide / Current Tables for Humboldt Bay Entrance, California
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Humboldt Bay Entrance
Click for Map
Sat -- 01:01 AM PST     5.33 feet High Tide
Sat -- 06:45 AM PST     2.19 feet Low Tide
Sat -- 07:08 AM PST     Sunrise
Sat -- 08:17 AM PST     Moonrise
Sat -- 12:21 PM PST     6.08 feet High Tide
Sat -- 05:54 PM PST     Sunset
Sat -- 07:15 PM PST     -0.04 feet Low Tide
Sat -- 07:56 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
55.35.14.53.72.92.32.22.63.64.65.5665.34.22.91.50.5-00.212.43.7

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 (22,6,7,8)
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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.