Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Manchester, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:04AMSunset 7:32PM Saturday March 25, 2017 6:40 AM PDT (13:40 UTC) Moonrise 4:52AMMoonset 4:09PM Illumination 4% 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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PZZ540 Point Arena To Point Reyes To 10 Nm- 310 Am Pdt Sat Mar 25 2017
Today..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 8 to 9 ft at 13 seconds.
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 7 to 9 ft at 14 seconds.
Sun..S winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 5 to 7 ft at 12 seconds. Chance of rain in the morning, then rain likely in the afternoon.
Sun night..W winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 6 to 7 ft at 12 seconds. Rain likely in the evening, then showers after midnight.
Mon..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 7 to 9 ft at 11 seconds. Chance of showers in the morning, then slight chance of showers in the afternoon.
Tue..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. W swell 9 to 12 ft.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft.
PZZ500 310 Am Pdt Sat Mar 25 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light winds and moderate seas will prevail across the waters through tonight, aside from south of pt sur and over northern Monterey bay where they are expected to moderately strengthen as the day progresses. Then on Sunday, winds over the northern waters will turn southerly and become somewhat stronger as a weak cold front approaches.

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 251256 cca
afdeka
area forecast discussion... Corrected aviation and marine
national weather service eureka ca
555 am pdt Sat mar 25 2017

Synopsis
A few hit and miss remain possible today, mainly this morning into
perhaps early afternoon, primarily for locations north of mendocino
county. Brief ridging will bring a temporary dry spell area-wide
tonight into Sunday morning, before another storm system brings
widespread rainfall, higher elevation snowfall, and gusty winds to
locations along and west of the coastal range. The on again off
again showery pattern will persist through Thursday morning, before
dry weather returns for the remainder of the week.

Discussion
Short term
(today and tonight)
showers remain possible through the first half of the day, before a
brief dry period commences tonight. As one storm system to our
southeast departs the region, the trough axis is in the midst of
crossing the forecast area early this morning. Additional jet energy
diving into the backside of this trough is what has let to a slight
increase in the showers this morning. This will hold true through
the first half of the day, before brief/weak ridging at the surface
and aloft overspreads the region while persisting into Sunday
morning. Look for afternoon highs to top out near seasonal values.

However, the next system will be quickly on the heels of the
departing trough, with clouds riding the ridge and spilling over the
area, resulting in only a slight decrease in cloud cover at best by
morning. The positive effect of the clouds will be better nocturnal
insolation, helping overnight lows remain a few degrees warmer,
perhaps giving your furnace a little bit more of a break.

Long term
(Sunday through Friday)
an off and on wet pattern will persist through the first half of the
week, before a pattern change brings increased sunshine and drying
to all of northwestern california. Before we get to that though, the
aforementioned storm system for Sunday will be moving into our neck
of the woods. A fairly strong area of low pressure will be
undergoing an occlusion process as it treks across the southeastern
pacific/southern gulf of alaska region, sending a trailing cold
front eastward. Ahead of this front, a 925mb jet of 45 to 50 knots
will develop across the outer waters and along the redwood coast
from CAPE mendocino north, in the late Sunday morning into the
afternoon time frame. This could bring some gusty winds to locations
to portions of humboldt and del norte counties. However, winds look
to be slightly less than yesterdays system.

As the front crosses the region during the afternoon and evening
hours, widespread rainfall will spread from west to east. Overall,
rainfall amounts don't look to be too significant, but some locally
heavy rainfall is expected, mainly for portions of humboldt and del
norte county along the south and west facing slopes. Things will be
on a downward trend for Monday, as precipitation becomes more
showery. Some higher elevation snowfall will occur during this time
as well, with snow levels gradually dropping from ~4500 to 3500
feet. Amounts will be light enough though to preclude any real
impacts to area passes, with the exception being scott mountain
pass, where some light accumulations will occur. As for the
convective potential, although 700mb and 500mb lifted indices do go
slightly negative, modest mid-level lapse rates and negligible
mucapes preclude any thunder inclusion in the zones (forecast) at
this time.

Another brief period of transient riding will build across the
region Monday evening into early Tuesday morning, with more dry
weather expected. However, another weak disturbance in the flow
aloft may bring additional precipitation back into the area for
Tuesday afternoon into Thursday morning time frame. This will need
to be watched though, as the models have shown a slight northward
drift in precipitation with some delay also seen in timing. In any
event, after this latter system, high pressure looks to build across
the state with perhaps a prolonged period, featuring mainly clear
skies and dry conditions. /pd

Aviation
Vfr conditions and light winds to calm conditions will continue at
kcec, kacv and kuki today as a weak high pressure ridge extends
across the region. However a few showers may move across some areas
at times today. Any showers may temporarily reduce ceilings and/or
visibilities to MVFR conditions at times primarily during the
morning.

Marine
Light winds and moderate seas will continue across the waters through
tonight as a weak high pressure ridge extends across the region. The
winds and seas will increase Sunday as a weak cold front approaches
the waters. The front will move across the waters Sunday evening.

Showers will move across the waters at times Sunday associated with
the cold front. The winds will increase Sunday. The winds and seas
will be higher across the outer waters and in or near any showers.

The winds will diminish Sunday night. Seas will increase Monday and
remain elevated through Wednesday as a westerly swell propagates
across the waters. Small craft advisories are likely across all the
waters Sunday due to increasing winds as the cold front moves across
the waters. Small craft advisories are likely across all the waters
Monday through Wednesday due to elevated seas associated with the
westerly swell.

Eka watches/warnings/advisories
Ca... None.

Northwest california coastal waters... None.

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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 mi40 min ENE 2.9 G 5.1 47°F 54°F1021.8 hPa (-0.8)
46014 - PT ARENA - 19NM North of Point Arena, CA 24 mi30 min E 3.9 G 5.8 53°F 1021.3 hPa51°F

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah, Ukiah Municipal Airport, CA31 mi1.7 hrsN 010.00 miPartly Cloudy43°F42°F97%1021.1 hPa

Wind History from UKI (wind in knots)
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S9SE5S5SE6S43SE4SE3CalmCalmNW4CalmN3CalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmCalm363SE6S8SW14SW11SW5E3CalmSE3CalmSE5CalmS3SE7SE6SE5S9
G16
2 days agoCalm334355Calm----W11
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NW8N6NE3N5E3CalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Point Arena, California
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Point Arena
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Sat -- 03:47 AM PDT     1.89 feet Low Tide
Sat -- 05:52 AM PDT     Moonrise
Sat -- 07:09 AM PDT     Sunrise
Sat -- 09:43 AM PDT     5.45 feet High Tide
Sat -- 04:22 PM PDT     0.05 feet Low Tide
Sat -- 05:09 PM PDT     Moonset
Sat -- 07:32 PM PDT     Sunset
Sat -- 10:49 PM PDT     5.03 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.13.32.621.92.22.93.84.75.35.454.12.91.60.60.10.20.81.93.14.14.85

Tide / Current Tables for Point Arena, California Current
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Point Arena
Click for Map
Sat -- 01:30 AM PDT     -0.92 knots Max Ebb
Sat -- 05:00 AM PDT     0.00 knots Slack
Sat -- 05:52 AM PDT     Moonrise
Sat -- 07:10 AM PDT     Sunrise
Sat -- 07:49 AM PDT     0.92 knots Max Flood
Sat -- 10:44 AM PDT     -0.00 knots Slack
Sat -- 01:43 PM PDT     -1.33 knots Max Ebb
Sat -- 05:09 PM PDT     Moonset
Sat -- 05:29 PM PDT     0.00 knots Slack
Sat -- 07:32 PM PDT     Sunset
Sat -- 08:26 PM PDT     1.13 knots Max Flood
Sat -- 11:35 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-0.9-0.9-0.7-0.4-00.50.80.90.80.4-0.2-0.8-1.2-1.3-1.1-0.8-0.30.30.81.11.10.80.4

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 (9,2,3,4)
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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.