Tuesday, January16, 2018 L-36.com


Marine Weather and Tides
Mendocino, 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 7:28AMSunset 5:17PM Tuesday January 16, 2018 5:28 PM PST (01:28 UTC) Moonrise 7:11AMMoonset 5:15PM Illumination 0% Phase: New Moon; Moon at 0 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- 229 Pm Pst Tue Jan 16 2018
.small craft advisory in effect through Wednesday afternoon...
.hazardous seas warning in effect from late Wednesday night through Saturday morning...
Tonight..SE winds 5 to 15 kt. Waves W 13 ft at 15 seconds. Slight chance of rain.
Wed..SE winds 10 to 20 kt with gusts to around 35 kt. Waves W 12 ft at 14 seconds.
Wed night..S winds 10 to 20 kt. Gusts up to 35 kt. Waves S 5 ft at 8 seconds...and W 15 ft at 17 seconds. Rain.
Thu..SW winds 5 to 15 kt. Waves W 22 ft at 18 seconds.
Thu night..SW winds 5 to 15 kt. Waves N 3 ft at 5 seconds... And W 20 ft at 16 seconds. Showers likely and slight chance of Thunderstorms.
Fri..W winds 5 to 10 kt. Waves W 20 ft at 16 seconds. Slight chance of Thunderstorms.
Sat..S winds 5 to 15 kt. Waves nw 17 ft at 15 seconds.
Sun..SW winds 15 to 25 kt. Waves sw 11 ft at 9 seconds...and W 12 ft at 15 seconds.
PZZ400 229 Pm Pst Tue Jan 16 2018
Synopsis for northern california waters..An increase in southerlies will occur on Wednesday as another moderate front moves across the waters. A long period westerly swell around 13 ft will continue through Wednesday...followed by a long period 20 ft westerly swell on Thursday and Friday.

7 Day Forecast for Marine Location Near Mendocino, CA
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location: 39.3, -123.8     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 162234
afdeka
area forecast discussion
national weather service eureka ca
234 pm pst Tue jan 16 2018

Synopsis Mainly dry conditions will occur across northwest
california through midday Wednesday. Thereafter, southerly winds
will strengthen ahead of a storm system during Wednesday
afternoon. This will be followed by an extended period of
precipitation Wednesday evening into Saturday. In addition, snow
levels will fall to 2500 feet Thursday night and Friday.

Discussion A weak warm frontal boundary is expected to move
onshore this evening. So light rain or drizzle is possible,
especially in the higher elevations. The models have been fairly
inconsistent with this, so confidence is low. As this warm front
moves off to the northeast warm and breezy conditions will move
across the area on Wednesday. These winds will be fairly strong,
gusts of 35 to 45 mph along the coast and over the near coastal
ridges. The strongest winds are expected with front passage and
are expected to diminish after the front passes. So we have
shortened the duration of the wind advisory, otherwise it looks
like it is on track. The ridges may need an advisory light rain
is expected to start early to mid afternoon along the coast.

Wednesday night the front moves through and brings moderate to
locally heavy rain. This will taper off Thursday morning. Most of
the precip with the main front will fall above 6,000 feet.

Thursday afternoon and overnight showers will increase as the cold
air aloft moves over the area. The heaviest showers are expected
to be in humboldt and del norte county. Along the coast there is
the potential for small hail. This will bring the slight chance
for thunder as well. Snow levels are expected to drop to 2,500 to
3,000 feet Friday morning. Went a few hundred feet below the
model forecast snow levels as the heavy showers will likely drive
snow levels a bit lower. Issued a winter storm watch for areas of
del norte and humboldt county over 3,000 feet. Some snow is likely
down to 2,500 feet, but confidence is low on the amounts. This
will need to be watched. This may need to be expanded to the
southwestern humboldt and trinity, but amounts to only at
advisory levels so will hold off on this for now.

Saturday high pressure starts to build into the area briefly.

Snow levels will rise and the showers will diminish. The next
system is expected to start to move into the area Saturday night
into Sunday. This front slowly moves across the area and has the
potential to bring heavy rain to the area. Snow levels look to be
above most major passes for the heaviest precip, but confidence
is low on how high they will be. Mkk

Aviation Coastal terminals north of the CAPE mendocino became
vfr by middle morning... Even as high clouds continued streaming
across the region. Plenty of low level moisture persisted over
mendocino interior valleys through the afternoon: uki was a
revolving cycle of MVFR-ifr as light shallow rain and moisture
continued over the valley. At the coast: large surf and westerly
light winds at acv brought cig vis tumbling into ifr at noon due
to haze sea spray. The remainder of the TAF period (through
Wednesday afternoon) will see increasing pre-frontal clouds that
will gradually lower. This evening: warm frontal drizzle this
evening is possible at the far NW coast. Also, southerly winds
will increase overnight as the cold front advances. Models show
llws possibilities at cec and acv by Wednesday afternoon. Inland
valley areas can expect low CIGS and vis once again the morning.

Marine Very active marine sea state and weather will be in store
for NW california waters over the next few days. A moderate cold
front will move across the coastal waters on Wednesday accompanied
by gale force southerlies across the northern outer waters while the
inner waters approach gale force status. Along with the wind and
increasing wind chop... A long period large westerly swell will also
move across the waters late Wednesday and Thursday. Peak significant
wave heights will approach 20 to 24 feet at around 20 seconds and
persist through Thursday. Due to the significant swell, a hazardous
seas warning remains in affect from early Thursday morning through
Saturday morning.

Surfzone The large long period westerly swell mentioned above will
arrive to the coast on Thursday. Swell heights offshore should range
between 20 and 22 feet but when the swell reaches the shore... Resulting
waves are expected to break near 25 to 30 ft. This falls within our high
surf warning criteria thus a warning is now in effect for Thursday.

Timing of peak waves looks to occur from early Thursday morning
through the afternoon so there will be some good opportunities to
view the surf. Of course extreme caution should be exercised as
higher run up waves are always possible.

Eka watches warnings advisories
Ca... High surf warning from 10 pm Wednesday to 10 pm pst Thursday for
caz101-103-104-109.

Winter storm watch from Thursday evening through Friday evening
for caz105-106.

Wind advisory from 11 am to 8 pm pst Wednesday for caz101.

Winter storm watch from Thursday afternoon through Friday
evening for caz102.

Northwest california coastal waters...

small craft advisory until 4 am pst Thursday for pzz450-475.

Hazardous seas warning from 4 am Thursday to 10 am pst Saturday
for pzz450-455-475.

Small craft advisory until 3 pm pst Wednesday for pzz455.

Small craft advisory until 7 am pst Wednesday for pzz470.

Gale warning from 7 am to 10 pm pst Wednesday for pzz470.

Hazardous seas warning from 10 pm Wednesday to 10 am pst
Saturday for pzz470.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46014 - PT ARENA - 19NM North of Point Arena, CA 10 mi38 min WNW 3.9 G 7.8 13 ft1023.1 hPa
ANVC1 - 9416841 - Arena Cove, CA 27 mi40 min W 1.9 G 4.1 55°F 56°F1023.4 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA34 mi92 minN 010.00 miOvercast59°F53°F81%1021.9 hPa

Wind History from UKI (wind in knots)
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Last 24hrS6S4SE7CalmCalmN3E4CalmCalmCalmCalmS3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmW3CalmCalmCalmCalmCalmCalmCalmCalmE3CalmCalmCalmCalmCalmSE5S9SE8S6SE3SE8
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW3CalmCalmW5

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
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Tue -- 04:01 AM PST     3.05 feet Low Tide
Tue -- 07:10 AM PST     Moonrise
Tue -- 07:32 AM PST     Sunrise
Tue -- 10:02 AM PST     6.30 feet High Tide
Tue -- 05:11 PM PST     -0.19 feet Low Tide
Tue -- 05:15 PM PST     Moonset
Tue -- 05:17 PM PST     Sunset
Tue -- 06:18 PM PST     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.64.33.73.233.23.84.65.466.365.242.61.20.2-0.2-00.71.72.93.94.5

Tide / Current Tables for Point Cabrillo, California Current
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Point Cabrillo
Click for Map
Tue -- 01:55 AM PST     -0.60 knots Max Ebb
Tue -- 05:11 AM PST     0.00 knots Slack
Tue -- 07:11 AM PST     Moonrise
Tue -- 07:33 AM PST     Sunrise
Tue -- 07:58 AM PST     0.75 knots Max Flood
Tue -- 10:46 AM PST     -0.00 knots Slack
Tue -- 02:01 PM PST     -1.37 knots Max Ebb
Tue -- 05:15 PM PST     Moonset
Tue -- 05:17 PM PST     Sunset
Tue -- 06:05 PM PST     0.00 knots Slack
Tue -- 06:18 PM PST     New Moon
Tue -- 09:07 PM PST     1.03 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-0.5-0.6-0.5-0.3-0.10.30.60.70.60.3-0.1-0.7-1.2-1.4-1.3-1-0.6-0.10.50.9110.7

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 (20,4,5,8)
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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.