Tuesday, September25, 2018 L-36.com


Marine Weather and Tides
Copperopolis, CA

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:53AMSunset 6:55PM Tuesday September 25, 2018 6:55 AM PDT (13:55 UTC) Moonrise 6:40PMMoonset 6:17AM Illumination 99% Phase: Full Moon; Moon at 15 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 256 Am Pdt Tue Sep 25 2018
Today..NW winds up to 10 kt...increasing to 5 to 15 kt with gusts up to 25 kt this afternoon.
Tonight..NW winds up to 10 kt.
Wed..NW winds 5 to 15 kt.
Wed night..NW winds 5 to 15 kt with gusts up to 25 kt.
Thu..NW winds 5 to 15 kt with gusts up to 25 kt.
Thu night..W winds 5 to 15 kt with gusts up to 25 kt.
Fri..W winds 5 to 10 kt.
Sat..SW winds 5 to 15 kt.
PZZ500 256 Am Pdt Tue Sep 25 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure over the eastern pacific extends into oregon. Winds will remain light along the coast through the week with the strongest winds north and west of the district. Low pressure will develop off the pacific northwest coast bringing southerly winds on Saturday.


7 Day Forecast for Marine Location Near Copperopolis, CA
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location: 37.94, -120.54     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 251104
afdsto
area forecast discussion
national weather service sacramento ca
330 am pdt Tue sep 25 2018

Synopsis
Warming to around 10 degrees above normal by midweek, then
cooling Friday into the weekend. Areas of gusty northerly wind
today will continue elevated fire weather concern. Slight chance
of showers over the coastal range and northern portions of the
forecast area this weekend.

Discussion
Upper ridging will continue to build inland across interior norcal
today into Wednesday resulting in northerly flow aloft and warming
ams. 1033 mb surface high pressure extends from epac through the
pacnw into the great basin. Enhanced low level pressure gradient
will continue areas of gusty northerly wind today. Strongest wind
expected in northern and western portions of the sacramento
valley, northeast foothills, western shasta mountains, and east
slopes of the coastal range. North wind of around 10 to 15 mph will
be typical with local gusts 25 to 35 mph. High temperatures today
are expected to warm another 2 to 5 degrees.

Some locally gusty north to northeast will continue to be
possible overnight Tuesday into Wednesday morning over shasta
county and eastern foothills and mountains. Pressure gradient
weakens by midday Wednesday. 1000-500mb thicknesses continue to
increase tomorrow with a few additional degrees of warming. High
temperatures Wednesday forecast to be about 10 degrees above
normal. Potential for some triple digit heat in the northern
sacramento valley.

Little change in high temperatures expected Thursday, then more
significant cooling Friday as deep closed upper low approaches.

Marine layer likely to deepen Thursday night into Friday as
onshore flow increases. Up to 10 degrees of cooling likely on
Friday with highs in the mid 80s to lower 90s for the central
valley with 60s to lower 80s for the mountains and foothills.

Pch
.Extended discussion (Saturday through Tuesday)
pacific low portion of the offshore rex block is forecast to push
onto the north coast by Saturday afternoon. This will bring
significantly cooler temperatures with daytime highs dropping to
between 5 and 10 degrees below normal. GFS and ECMWF both
indicating some precipitation associated with this low over the
coast range and northern mountains Saturday afternoon and evening.

This low opens and shifts to the northeast on Sunday but a few
lingering showers may still be possible over the shasta county
mountains. Models diverge going in to early next week with GFS and
ecmwf coming in with two different but interesting outcomes.

Ecmwf solution brings a fairly strong for the season pacific low
and frontal system into northern california on Monday.

Precipitation amounts with this scenario would be fairly
significant for early october and likely a fire season ending type
of event. GFS has a significantly different outcome taking the
pacific low to the southeast keeping it off the coast. In this
scenario, moisture from a tropical depression now south of baja is
forecast to be pulled northward into southern california on
Monday bringing a significant amount of precipitation to the
southern half of the state. For the most part this model solution
would leave northern california dry although the southern most cwa
could receive some light precipitation. The end of the extended
period, next Tuesday looks dry and a little warmer at this time
but model confidence is low with such a large variation in model
solutions.

Aviation
Vfr conditions the next 24 hours. Northwest to northeast winds
10-15 knots gusts to 25 knots sacramento northward and over the
sierra. Otherwise winds generally below 10 knots.

Sto watches warnings advisories
Red flag warning until 5 pm pdt this afternoon for central
sacramento valley in glenn, colusa, yuba, northern sutter, and
butte county below 1000 ft-eastern mendocino nf-eastern portion
of shasta trinity nf-lake county portion of lake-napa-sonoma
unit-northern motherlode from 1000 to 3000 ft. Includes portions
of nevada-yuba-placer-amador and eldorado units-northern
sacramento valley to southern tehama county line below 1000 ft-
northern sierra foothills from 1000 to 3000 ft. Includes
portions of shasta-trinity and butte units-northern sierra
including lassen np and plumas and lassen nf S west of the
sierra crest (west of evans peak-grizzly peak-beckworth peak)-
northern sierra including the tahoe and eldorado nf S west of
the sierra crest-southeast edge shasta-trinity nf and western
portions of tehama-glenn unit-southern sacramento valley in yolo-
sacramento far western placer, southern sutter and solano county
below 1000 ft-stanislaus nf west of the sierra crest.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PCOC1 - 9415144 - Port Chicago, CA 80 mi43 min 58°F 67°F1012.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 81 mi70 min W 1.9 55°F 1012 hPa49°F
RTYC1 - 9414523 - Redwood City, CA 94 mi37 min 70°F

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from O22 (wind in knots)
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Last 24hr--------CalmCalm----CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS5W8SW6SW74SW6
1 day agoSW6W4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm----SW5----------6
2 days agoSW63Calm3CalmCalm--CalmCalmCalmCalmCalm--CalmCalmCalmCalmS3S6------4--

Tide / Current Tables for Stockton, San Joaquin River, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Brandt Bridge, San Joaquin River, California Current
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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wmap_P
GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Sacramento, 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.