Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Manchester, 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 7:02AMSunset 4:55PM Tuesday November 21, 2017 9:43 AM PST (17:43 UTC) Moonrise 9:42AMMoonset 7:44PM Illumination 9% 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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PZZ540 Point Arena To Point Reyes To 10 Nm- 837 Am Pst Tue Nov 21 2017
Today..SE winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 3 to 4 ft at 11 seconds.
Tonight..SE winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 4 to 6 ft at 10 seconds.
Wed..S winds 10 kt...becoming W in the afternoon. Wind waves 2 ft or less. SW swell 6 to 8 ft at 12 seconds.
Wed night..W winds 10 kt. Wind waves 2 ft or less. W swell 5 to 6 ft at 15 seconds. Slight chance of rain.
Thanksgiving day..NW winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 5 to 6 ft at 15 seconds. Chance of rain.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 4 to 6 ft. Slight chance of rain.
Sat..SE winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft. Slight chance of rain.
PZZ500 837 Am Pst Tue Nov 21 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate winds will prevail over the coastal waters with north winds over southern waters and south winds over northern waters. Chances of rain will return to the northern waters towards the end of the week. West to northwest swell will increase mid-week.

7 Day Forecast for Marine Location Near Manchester, CA
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location: 38.95, -123.73     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 211134
afdeka
area forecast discussion
national weather service eureka ca
334 am pst Tue nov 21 2017

Synopsis Mainly dry weather and cloudy skies are expected
today with occasional light rain possible this afternoon in the
north. Wednesday and Thursday will continue to see unsettled
weather with cloudy skies and occasional light rain. Friday looks
mainly dry before another system brings rain for the weekend.

Discussion The atmospheric river and warm frontal boundary that
brought significant rain to the area yesterday have moved out of
the area. Water vapor satellite continues to shows a plume of
moisture off the coast and a ridge over the west coast. This has
brought a very warm and moist airmass to northwest ca this
morning. Along the coast temperatures are in the upper 50s to
middle 60s, while temperatures inland are somewhat cooler. Breezy
south winds are also impacting the area. Some gusts to 45 mph are
possible over the higher peaks of del norte county. These will
diminish slightly in the afternoon.

Mainly dry conditions are expected this morning although clouds
will persist and some light rain or drizzle is possible over the
higher terrain. Currently there is a shortwave well off the coast
riding up the plume of moisture. This afternoon the GFS has this
wave moving up through the southwest flow and pushing the moisture
plume and some precip onshore in humboldt and del norte counties.

Tonight the moisture plume moves back offshore, but clouds and
warm temperatures will persist. Some fog is possible, especially
in mendocino county if the high clouds clear out a bit.

Wednesday and Thursday the GFS continues to the GFS continues to
show subtle waves in the flow bringing occasional light precip to
the much of the area. Confidence is low on the exact timing and
strength of each of these waves, but due to the moist airmass
precip looks likely at some point.

Friday the ridge builds a bit and most of the area is expected
to see dry weather. There is still a slight chance of rain in the
forecast this is mainly due to the possibility of the systems on
either side of this window speeding up or slowing down. Partial
clearing is possible, but confidence is low on that as well.

Friday night into the weekend another system moves onshore.

Initially a warm front passes through the area Saturday, followed
by a cold front Saturday night and another one on Sunday. The gfs
is colder with this second system than the ecmwf. There is the
potential for snow down to hwy pass levels in trinity county. Mkk

Aviation PrevailingVFR conditions can be expected at most
terminals between 12z Tuesday and 12z Wednesday, with a few
exceptions. Low clouds and mist across interior valleys, including
near uki, may result in periodic lifr ceilings early in the morning
but should improve shortly after sunrise. Along the coast, brief
MVFR ceilings will be possible during the afternoon and evening
along with some light rain. In addition, coastal terminals will
flirt with llws criteria for nearly the entire 24 hour period,
likely maintaining near 30 kt of wind shear between 0 and 2000 ft
agl with minor fluctuations. Brc

Marine Southerly to southeasterly winds will continue to increase
across the waters this morning as a warm front lifts to the north of
the area and a cold front slowly approaches from the west. Winds
will peak during the afternoon, reaching near gale strength across
the waters 10+nm offshore and north of CAPE mendocino. Waters south
of the CAPE and closer to shore will remain more sheltered from
these stronger gales, but will be moderately breezy nonetheless.

These southerlies will result in building steep seas, particularly
in the northern offshore areas with the strongest winds.

Overnight Tuesday, winds will weaken slightly, but will remain fresh
to strong through late Wednesday. Meanwhile, both a fresh southwest
swell and a longer period northwest swell will move through the
waters at this time, and the end result will be a chaotic and
uncomfortable sea state that will last through Wednesday night.

Winds will weaken Thursday and allow the steeper southerly seas to
settle, but the previously mentioned swells will maintain improved
but still somewhat uncomfortable conditions through the end of the
week.

On Saturday, another cold front will bring a return of strong
southerlies, and this will be followed closely by a building long
period northwest swell. Brc

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters...

small craft advisory until 5 am pst early this morning for
pzz470.

Gale warning from 5 am early this morning to 4 pm pst this
afternoon for pzz470.

Small craft advisory until 4 am pst Wednesday for pzz475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANVC1 - 9416841 - Arena Cove, CA 3 mi44 min E 6 G 9.9 63°F 56°F1020.9 hPa (+0.5)
46014 - PT ARENA - 19NM North of Point Arena, CA 24 mi34 min SE 14 G 16 1019.3 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA31 mi1.8 hrsN 00.25 miFog53°F52°F96%1021.5 hPa

Wind History from UKI (wind in knots)
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Last 24hrS5S4S4SE6SE6S5S5S6SE4S3CalmE3CalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmNE4Calm3S3SW4S3CalmCalmCalmCalmCalmCalmNW5NW3CalmCalmSE4SE3SE4CalmCalmS8Calm
2 days agoCalmCalmCalmCalmN3W4W4CalmCalmCalmCalmCalmCalmCalmCalmNW3CalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Point Arena, California
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Point Arena
Click for Map
Tue -- 01:18 AM PST     4.49 feet High Tide
Tue -- 06:00 AM PST     2.87 feet Low Tide
Tue -- 07:04 AM PST     Sunrise
Tue -- 09:41 AM PST     Moonrise
Tue -- 11:47 AM PST     5.58 feet High Tide
Tue -- 04:56 PM PST     Sunset
Tue -- 07:02 PM PST     -0.11 feet Low Tide
Tue -- 07:43 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.14.54.443.532.933.54.24.95.45.65.24.43.32.110.2-0.10.10.81.72.8

Tide / Current Tables for Point Arena, California Current
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Point Arena
Click for Map
Tue -- 02:03 AM PST     -0.00 knots Slack
Tue -- 04:10 AM PST     -0.62 knots Max Ebb
Tue -- 07:04 AM PST     Sunrise
Tue -- 07:29 AM PST     0.00 knots Slack
Tue -- 09:41 AM PST     Moonrise
Tue -- 10:12 AM PST     0.61 knots Max Flood
Tue -- 12:53 PM PST     -0.00 knots Slack
Tue -- 04:17 PM PST     -1.26 knots Max Ebb
Tue -- 04:56 PM PST     Sunset
Tue -- 07:43 PM PST     Moonset
Tue -- 08:15 PM PST     0.00 knots Slack
Tue -- 11:17 PM PST     0.94 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.50-0.4-0.6-0.5-0.4-0.10.10.40.60.50.3-0-0.5-1-1.2-1.2-0.9-0.5-0.10.30.70.9

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 (12,3,4,5)
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Ground Weather Radar Station Sacramento, 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.