Thursday, October19, 2017 L-36.com


Marine Weather and Tides
Calpella, 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 7:26AMSunset 6:28PM Thursday October 19, 2017 7:23 AM PDT (14:23 UTC) Moonrise 6:13AMMoonset 5:53PM Illumination 1% Phase: New Moon; Moon at 29 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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PZZ540 Point Arena To Point Reyes To 10 Nm- 247 Am Pdt Thu Oct 19 2017
.small craft advisory in effect from this evening through late Friday night...
Today..S winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell nw 4 to 6 ft at 11 seconds and sw 3 ft at 15 seconds. Patchy fog in the morning. Slight chance of rain in the morning, then chance of rain in the afternoon.
Tonight..W winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft at 20 seconds...increasing to 13 to 16 ft at 20 seconds after midnight. SWell S 3 ft. Rain in the evening, then slight chance of rain after midnight.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 14 to 17 ft at 18 seconds. Slight chance of showers in the morning.
Fri night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 13 to 16 ft at 17 seconds.
Sat..NW winds 10 kt. Wind waves 2 ft or less. NW swell 9 to 12 ft at 14 seconds.
Sun..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft.
Mon..NW winds 5 to 15 kt. Wind waves 1 to 3 ft...becoming 2 ft or less. W swell 7 to 9 ft.
PZZ500 247 Am Pdt Thu Oct 19 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A cold front is forecast to pass through the region later this evening. Winds will increase along and just behind the front, occasionally gusting around 25 knots at times. Showers will be possible ahead of and along the cold front, as well. A very robust northwest, long period swell will arrive late this afternoon and through the evening, generating large waves and hazardous seas through at least Saturday. Operators of small crafts are urged to use extreme caution if out at sea over the next several days.

7 Day Forecast for Marine Location Near Calpella, CA
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location: 39.21, -123.35     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 191204
afdeka
area forecast discussion
national weather service eureka ca
504 am pdt Thu oct 19 2017

Synopsis A frontal system will bring increasing southerly winds
and widespread rain to the CWA today. A broad trough will be
passing through the pacific northwest which will allow for
lingering showers through the weekend. By early next week, high
pressure will build over the area leading to warm and dry weather.

Discussion
Short term (today through Friday) we await the arrival of a
frontal system this morning which will bring increasing southerly
winds and widespread rainfall to northwest california. The
strongest winds are forecast to be north of mendocino county,
especially for ridges above 1000 feet in del norte and humboldt
counties and coastal communities in del norte. Gusts up to 40 to
45 mph are expected for these locations, resulting in a wind
advisory from 11am to 5pm, while other areas remain below
criteria but remain breezy. Winds may cause branches and unhealthy
trees to fall, loose objects to topple over, and difficult
driving conditions for high profile vehicles. As for total
rainfall amounts through Friday, del norte county can expect to
see 1.50 to 2.0 inches with higher amounts possible in the ridges.

Humboldt county will also see a decent amount of rain with
totals ranging from 0.50 to 1.50 inches. Trinity and mendocino
counties are projected to receive anywhere from 0.30 to 0.75
inches. Cooler temperatures are forecast during this time frame
and with the passage of the front later this evening, snow levels
will drop to near 4500 to 5000 feet. Accumulating snow will
primarily occur north of hwy 299 and in the trinity alps and
siskiyou mountains; however, a light dusting to up to 1 inch of
snow accumulation may occur over south fork mountain and the yolla
bolly. Conditions will also be favorable for convective showers
and perhaps even a few thunderstorms over the ocean tonight. If a
stronger cell were to get going and hold together, coastal
communities north of CAPE mendocino may hear a few rumbles of
thunder.

Low temperatures for tonight will range from the 30s to near 50
with the coldest temperatures occurring in trinity, eastern del
norte, and northeast mendocino counties. No freeze or frost
products are expected for these areas, but those who have
sensitive plants may want to move them indoors or cover them up.

Especially if they haven't received killing cold temperatures yet.

Long term (Saturday through Friday) additional rainfall is
expected over the weekend as a warm front sets up over the
region. This will be a result of the trough pushing eastward and
high pressure building over the area. Accumulating rain is
expected to stay north of mendocino county with del norte and
northern humboldt counties receiving most of the rain. By early
next week drier and warmer weather will return to northwest
california.

Aviation A cold front generating rain across the pacific
northwest early this morning will sag southward into far NW california
by midday today. The rain may become briefly heavy this afternoon
and evening resulting in ifr ceilings and reduced vsbys for kcec.

Winds will be quite brisk both at the surface and aloft. Kcec may
experience gusts to 45 mph. For kacv the strong winds will
probably remain aloft and the potential for low level wind shear
will be present. The rain will likely hold off for kuki til this
evening or overnight. Conditions will likely deteriorate to MVFR
at kuki this evening. A trough in the cold and unstable air mass
following the front may produce isolated tstms near the coast
later tonight. Overall, conditions will likely improve toVFR or
MVFR later tonight for the coastal terminals after the front
transitions southeastward.

Marine The tail end of a cold front will move across
the waters today. Southerly winds in advance of this cold front will
briefly gust up to 35 kt north of CAPE mendo by early afternoon.

Steep southerly wind waves will also be generated, primarily outside
10nm and along the western fringes of the inner waters. Large west
to northwest swell from 18 to 22 feet with long periods will build
behind the front tonight. It may take til the mid to late evening
for the swell to arrive and for high surf to develop. High surf will
pound the shoreline on Friday with breakers around 23 to 25 feet
expected. A warm front will generate a new round of brisk southerly
winds and steep southerly waves north of CAPE mendo on Saturday.

Winds will fall below advisory or warning levels on Sunday, however
seas will likely remain elevated through the weekend. Brisk north
winds should return early next week.

Fire weather Increasing southerly winds are forecast for
today and will primarily affect coastal del norte county and
ridges above 1000 feet in del norte and humboldt counties. Gusts
up to 40 to 45 mph are expected for these areas, thus a wind
advisory has been issued. Elsewhere, winds are expected to be
breezy; however, with improving humidities and rain moving into
the area there should be a minimal fire threat. Look for all of
northwest california to receive a wetting rain with areas north of
mendocino county receiving the most amount of rain. For areas
where there are active fires, total rainfall amounts should reach
to at least 0.30 inches, especially as you move north of ukiah.

Additional chances for rain will continue into the weekend, but
should remain confined northern humboldt and del norte counties.

By early next week, high pressure will take hold of the forecast
and bring warming and drying conditions to the area.

Eka watches warnings advisories
Ca... High surf advisory from 5 pm this afternoon to 6 pm pdt Friday
for caz101-103-104-109.

Wind advisory from 11 am this morning to 5 pm pdt this afternoon
for caz101-102-104>106.

Northwest california coastal waters... Small craft advisory until 5 pm pdt this afternoon for pzz470.

Hazardous seas warning from 5 pm this afternoon to 6 pm pdt
Friday for pzz450-455-470-475.

Small craft advisory from 9 am this morning to 5 pm pdt this
afternoon for pzz450-455-475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANVC1 - 9416841 - Arena Cove, CA 28 mi54 min ESE 1.9 G 2.9 53°F 52°F1015.5 hPa
46263 32 mi54 min 52°F5 ft
46014 - PT ARENA - 19NM North of Point Arena, CA 33 mi44 min ESE 5.8 G 7.8 1014.9 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA9 mi88 minN 010.00 miOvercast46°F37°F73%1014.8 hPa

Wind History from UKI (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmW7W8NE7CalmCalmCalmCalmCalmCalmCalmCalmE3CalmCalmSE4Calm
1 day agoCalmCalmCalmCalmCalm3CalmCalm3SE5SE3E5CalmN4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmE3CalmCalm3N4CalmCalmCalmCalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Albion, California
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Albion
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Thu -- 05:09 AM PDT     1.14 feet Low Tide
Thu -- 07:14 AM PDT     Moonrise
Thu -- 07:29 AM PDT     Sunrise
Thu -- 11:29 AM PDT     5.87 feet High Tide
Thu -- 12:12 PM PDT     New Moon
Thu -- 05:46 PM PDT     0.23 feet Low Tide
Thu -- 06:29 PM PDT     Sunset
Thu -- 06:54 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.24.53.52.41.51.21.42.13.14.25.25.85.85.13.92.51.20.40.20.71.62.73.84.7

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
Click for Map
Thu -- 05:09 AM PDT     1.08 feet Low Tide
Thu -- 07:15 AM PDT     Moonrise
Thu -- 07:29 AM PDT     Sunrise
Thu -- 11:23 AM PDT     5.80 feet High Tide
Thu -- 12:12 PM PDT     New Moon
Thu -- 05:49 PM PDT     0.16 feet Low Tide
Thu -- 06:29 PM PDT     Sunset
Thu -- 06:54 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
54.43.42.31.51.11.323.14.25.25.75.753.82.41.20.40.20.61.52.63.84.6

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 (10,2,3,4)
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Ground Weather Radar Station Beal AFB, 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.